Bifunctional Ionic Covalent Organic Networks for Enhanced Simultaneous Removal of Chromium(VI) and Arsenic(V) Oxoanions via Synergetic Ion Exchange and Redox Process
Integration of the anion-receptor guanidinium and redox-active phenol functionalities in the context of an ionic covalent organic network (iCON) promotes a synergistic ion-exchange-redox process that can effectively sequester chromate and arsenate simultaneously in water regardless of the concentration and presence of other interfering oxoanions. AbstractChromium (VI) and arsenic (V) oxoanions are major toxic heavy metal pollutants in water threatening both human health and environmental safety. Herein, the development is reported of a bifunctional ionic covalent organic network (iCON) with integrated guanidinium and pheno...
Source: Small - October 23, 2021 Category: Nanotechnology Authors: Ping Li, Joshua T. Damron, Gabriel M. Veith, Vyacheslav S. Bryantsev, Shannon M. Mahurin, Ilja Popovs, Santa Jansone ‐Popova Tags: Research Article Source Type: research

Layer ‐Tunable Nonlinear Optical Characteristics and Photocarrier Dynamics of 2D PdSe2 in Broadband Spectra
2D PdSe2 has emerged as a new 2D material exhibiting prominent layer-dependent electronic structures. Herein, layer-tunable optical bandgap, nonlinear absorption, and photocarrier dynamics of 2D PdSe2 films in broadband visible-to-near-infrared wavelengths are systematically demonstrated. This work enriches the understanding of the correlations between layer/electronic structure and nonlinear optical properties in PdSe2 for further exploring their versatile applications. AbstractLayered 2D transition metal dichalcogenides (TMDCs) exhibited fascinating nonlinear optical (NLO) properties for constructing varied promising opt...
Source: Small - October 22, 2021 Category: Nanotechnology Authors: Chenyu Ye, Zhenqi Yang, Junhao Dong, Yongfeng Huang, Miaomiao Song, Baisheng Sa, Jingying Zheng, Hongbing Zhan Tags: Research Article Source Type: research

Contribution of the Sub ‐Surface to Electrocatalytic Activity in Atomically Precise La0.7Sr0.3MnO3 Heterostructures
This study on the electrocatalytic activity of epitaxial heterostructures provides new insight in designing efficient electrocatalytic nanomaterials and core-shell architectures. (Source: Small)
Source: Small - October 22, 2021 Category: Nanotechnology Authors: Jegon Lee, Prajwal Adiga, Sang A Lee, Seung Hyun Nam, Hyeon ‐Ah Ju, Min‐Hyoung Jung, Hu Young Jeong, Young‐Min Kim, Cindy Wong, Radwan Elzein, Rafik Addou, Kelsey A. Stoerzinger, Woo Seok Choi Tags: Research Article Source Type: research

Nitrogen ‐Doped Carbon Networks with Consecutive Conductive Pathways from a Facile Competitive Carbonization‐Etching Strategy for High‐Performance Energy Storage
This study opens an encouraging avenue toward the tailored synthesis of metal-organic frameworks (MOFs)-derived carbon electrodes for renewable energy storage applications and devices. (Source: Small)
Source: Small - October 22, 2021 Category: Nanotechnology Authors: Siliang Liu, Zhe Zhao, Li Jin, Jing Sun, Chenlu Jiao, Qin Wang Tags: Research Article Source Type: research

Optimizing SnO2 −x/Fe2O3 Hetero‐Nanocrystals Toward Rapid and Highly Reversible Lithium Storage
The optimizing SnO2 −x/Fe2O3 hetero-nanocrystals with the help of density functional theory calculations are demonstrated as anode materials for high-energy and fast-charging lithium-ion batteries. Engineering oxygen vacancy and the early-generated metallic Fe enabling easy fracture of Li –O bonds synergistically enhance the electrochemical reversibility and reaction kinetics. After stabilized by reduced graphene oxide, they show an excellent lithium storage capacity and cycling stability. AbstractEngineering oxygen vacancy and boosting Li2O reversibility on oxides-based electrode are of significance but remain...
Source: Small - October 22, 2021 Category: Nanotechnology Authors: Chen Hu, Ling Chen, Yanjie Hu, Aiping Chen, Long Chen, Hao Jiang, Chunzhong Li Tags: Research Article Source Type: research

Bio ‐Derived Surface Layer Suitable for Long Term Cycling Ni‐Rich Cathode for Lithium‐Ion Batteries
Tooth-enamel derived material is applied to the surface of Ni-rich cathode material, and this layer gradually changes into a more stable material by reacting with HF in electrolyte, which is called fluorization. The cathode shows more stable battery characteristics than the bare electrode. AbstractSince Ni-rich cathode material is very sensitive to moisture and easily forms residual lithium compounds that degrade cell performance, it is very important to pay attention to the selection of the surface modifying media. Accordingly, hydroxyapatite (Ca5(PO4)3(OH)), a tooth-derived material showing excellent mechanical and therm...
Source: Small - October 22, 2021 Category: Nanotechnology Authors: Chang ‐Heum Jo, Natalia Voronina, Hee Jae Kim, Hitoshi Yashiro, Najma Yaqoob, Olivier Guillon, Payam Kaghazchi, Seung‐Taek Myung Tags: Research Article Source Type: research

Smart Nanogatekeepers for Tumor Theranostics
The emerging progress of structure-transformable nanogatekeepers and structure-stable nanogatekeepers is briefly introduced for tumor imaging and therapy: the former mainly overview nanogatekeepers undergoing structural transformation in tumor microenvironments, cell membranes, and organelles, while the latter particularly overview intelligent structure-stable nanogatekeepers through reversible activation and artificial individualization receptors for tumor theranostics. AbstractNanoparticulate drug delivery systems (nano-DDSs) are required to reliably arrive and persistently reside at the tumor site with minimal off-targe...
Source: Small - October 22, 2021 Category: Nanotechnology Authors: Xunfa Zhang, Yang Chen, Xian He, Yachao Zhang, Mei Zhou, Chengjun Peng, Zhonggui He, Shuangying Gui, Zhenbao Li Tags: Review Source Type: research

Strong Penetration ‐Induced Effective Photothermal Therapy by Exosome‐Mediated Black Phosphorus Quantum Dots
A novel BPQDs@EXO nanospheres (BEs) photothermal agent is synthesized by electroporation method to successfully accelerate the permeability on tumoral organoids, along with great biocompatibility, long circulation time, and excellent tumor targeting ability. AbstractNanocancer medicine, such as photothermal therapy (PTT), as a promising way to solve cancer without side effects, faces a huge biological barrier during the circulation of nanoparticles in the body, including nanobiological interactions in the blood, isolation of nanoparticles in the macrophage system, tumor spillover effect, and especially uneven intratumoral ...
Source: Small - October 22, 2021 Category: Nanotechnology Authors: Jing Liu, Kezhen Yi, Qi Zhang, Hang Xu, Xingang Zhang, Dong He, Fubing Wang, Xiangheng Xiao Tags: Research Article Source Type: research

In Situ Grown CoMn2O4 3D ‐Tetragons on Carbon Cloth: Flexible Electrodes for Efficient Rechargeable Zinc–Air Battery Powered Water Splitting Systems
Flexible 3D CoMn2O4 is grown on carbon cloth by a facile in situ hydrothermal method. The controlled tetragonal morphology of CMO-U@CC reveals high exposure of active surface area and electronic conductivity. The multifunctional electrode with improved kinetics boosts the electrocatalytic activities (ORR, OER, and HER) to integrate the rechargeable zinc –air battery and water splitting systems. AbstractThe integration of energy conversion and storage systems such as electrochemical water splitting (EWS) and rechargeable zinc –air battery (ZAB) is on the vision to provide a sustainable future with green energy r...
Source: Small - October 22, 2021 Category: Nanotechnology Authors: Gnanaprakasam Janani, Subramani Surendran, Hyeonuk Choi, Mi ‐Kyung Han, Uk Sim Tags: Research Article Source Type: research

Sub ‐Nanometer Confined Ions and Solvent Molecules Intercalation Capacitance in Microslits of 2D Materials
Solvent/ions cointercalation and desolvation process, to construct the intercalation model related with sub-nanometer confined ions and solvent molecules (H2O) to further optimize the intercalation capacitance model. Combining with the density functional theory calculation, it is found that the intercalation capacitance arises from the diffusion of solvated ion and controlled by quantum and electrochemical capacitance for desolvated ion. AbstractThe ion intercalation behavior in 2D materials is widely applied in energy storage, electrocatalysis, and desalination. However, the detailed effect of ions on the performance, com...
Source: Small - October 22, 2021 Category: Nanotechnology Authors: Yaqing Guo, Xufeng Hong, Yaqiong Su, Wen Luo, Ruohan Yu, Jinsong Wu, Emiel J. M. Hensen, Liqiang Mai, Yuancheng Cao Tags: Research Article Source Type: research

Graphene Confers Ultralow Friction on Nanogear Cogs
Atomically thin graphene covered silicon textured surface is pivotal for nanoscale robotics and nanogear operations. The conformation of graphene over serrated grooves provides mechanical strength and controlled frictional energy dissipation. It can channelize the mobility of nanoscale objects in a specific direction. Also, the asymmetrical straining in graphene over different grooves separation begins an era of straintronics. AbstractFriction-induced energy dissipation impedes the performance of nanomechanical devices. Nevertheless, the application of graphene is known to modulate frictional dissipation by inducing local ...
Source: Small - October 22, 2021 Category: Nanotechnology Authors: Andrea Mescola, Guido Paolicelli, Sean P. Ogilvie, Roberto Guarino, James G. McHugh, Alberto Rota, Erica Iacob, Enrico Gnecco, Sergio Valeri, Nicola M. Pugno, Venkataramana Gadhamshetty, Maksud M. Rahman, Pulickel Ajayan, Alan B. Dalton, Man Tags: Research Article Source Type: research

Self ‐Assembly of Protein‐Containing Lipid‐Bilayer Nanodiscs from Small‐Molecule Amphiphiles
Two small-molecule amphiphiles with diglucose headgroups and either a hydrocarbon or a fluorocarbon hydrophobic chain directly assemble lipids and membrane proteins to form lipid-bilayer nanodiscs. These self-assembled nanostructures have a gentle effect on the encapsulated lipid-bilayer core and membrane proteins. The fluorinated amphiphile appears particularly promising because its chain is both hydrophobic and lipophobic. AbstractWhen membrane proteins are removed from their natural environment, the quality of the membrane-solubilizing agent used is critical for preserving their native structures and functions. Nanodisc...
Source: Small - October 21, 2021 Category: Nanotechnology Authors: Florian Mahler, Annette Meister, Carolyn Vargas, Gr égory Durand, Sandro Keller Tags: Research Article Source Type: research

Air Bubble Bridge ‐Based Bioinspired Underwater Adhesion (Small 42/2021)
Underwater AdhesionIn article number2103423, Huawei Chen and co-workers propose a novel concept of underwater adhesion inspired by the diving beetle, which utilizes air bubbles as an adhesive to realize nondestructive and repeatable adhesion working across a wide range of scales. The bubble acting forces can be adjusted and controlled by spine structures and surface wettability. These findings enrich the underwater adhesion strategy and provide potential solutions for the fields of chemical, medical and mechanical engineering. (Source: Small)
Source: Small - October 21, 2021 Category: Nanotechnology Authors: Yan Wang, Liwen Zhang, Yurun Guo, Yang Gan, Guang Liu, Deyuan Zhang, Huawei Chen Tags: Inside Back Cover Source Type: research

Machine Learning Accelerated, High Throughput, Multi ‐Objective Optimization of Multiprincipal Element Alloys (Small 42/2021)
Multiprincipal Element AlloysIn article number2102972, Teng Li and co-workers present a highly efficient design strategy of multiprincipal element alloys (MPEAs) through a coherent integration of molecular dynamic simulation, machine learning algorithms and genetic algorithm. Such a design strategy not only yields remarkable precision of prediction of the critical resolved shear stress and Young's modulus of CoNiCrFeMn MPEAs with an impressively low error, but also enables a drastic 12 600-fold reduction of prediction time in comparison with pure atomic simulations. The multi-objective genetic algorithm further helps ident...
Source: Small - October 21, 2021 Category: Nanotechnology Authors: Tian Guo, Lianping Wu, Teng Li Tags: Back Cover Source Type: research

Label ‐Free Identification of Single Mononucleotides by Nanoscale Electrophoresis (Small 42/2021)
Identification of MononucleotidesIn article number2102567, Steven A. Soper, Sunggook Park, and co-workers develop a novel polymer nanofluidic sensor consisting of a nanochannel column and two sub-10 nm in-plane pores formed in polymer substrate via nanoimprint lithography. This nanosensor demonstrates label-free detection and identification of dNMPs, the building block of DNAs, via their time-of-flight through the nanochannel column. (Source: Small)
Source: Small - October 21, 2021 Category: Nanotechnology Authors: Junseo Choi, Zheng Jia, Ramin Riahipour, Collin J. McKinney, Charuni A. Amarasekara, Kumuditha M. Weerakoon ‐Ratnayake, Steven A. Soper, Sunggook Park Tags: Frontispiece Source Type: research

Hybrid Metal –Boron Diatomic Site Embedded in C2N Monolayer Promotes C–C Coupling in CO2 Electroreduction (Small 42/2021)
Hybrid Metal –Boron Diatomic SiteIn article number2104445, Wei An and co-workers demonstrate the validity of a novel hybrid atomic site which is able to promote CO2 electroreduction (CO2RR). Besides the carbon-affinity of the metal, the electronic spin state of the metal can also play an important role in modulating selectivity and C –C coupling in CO2RR. (Source: Small)
Source: Small - October 21, 2021 Category: Nanotechnology Authors: Miaomiao He, Wei An, Yuanqiang Wang, Yong Men, Shuang Liu Tags: Inside Front Cover Source Type: research

Effective Screening Route for Highly Active and Selective Metal −Nitrogen‐Doped Carbon Catalysts in CO2 Electrochemical Reduction (Small 42/2021)
Computational Screening for ElectrocatalystsIn article number2103705, Jeong Woo Han and co-workers introduce the computational screening route for highly and selective metal-nitrogen-doped carbon (M-N-C) catalysts in electrochemical CO2 reduction. Identified M-N-C catalysts are synthesized and characterized for experimental validation. This screening route provides a feasible path toward rational electrocatalyst design and insights into the correlation between experimental and theoretical studies. (Source: Small)
Source: Small - October 21, 2021 Category: Nanotechnology Authors: Byoung Joon Park, Ying Wang, Yechan Lee, Kyung ‐Jong Noh, Ara Cho, Myeong Gon Jang, Rui Huang, Kug‐Seung Lee, Jeong Woo Han Tags: Cover Picture Source Type: research

Masthead: (Small 42/2021)
(Source: Small)
Source: Small - October 21, 2021 Category: Nanotechnology Tags: Masthead Source Type: research

3D Printed Embedded Metamaterials
The manufacturing of 3D and conformal metamaterials remains a major challenge. In this paper, the projection micro-stereolithography 3D printing technology combined with the liquid metal filling method is employed to fabricate the metamaterials, which are characterized with embedded features that can effectively protect the metal resonance layer from external influence, and integrated molding of macro –micro structures and function-structure. AbstractThe manufacturing of 3D and conformal metamaterials remains a major challenge. The projection micro-stereolithography 3D printing technology combined with the liquid met...
Source: Small - October 21, 2021 Category: Nanotechnology Authors: Kun Peng Zhang, Yan Fei Liao, Bin Qiu, Yue Kun Zheng, Ling Ke Yu, Gong Han He, Qin Nan Chen, Dao Heng Sun Tags: Research Article Source Type: research

Recent Advances in Pyroelectric Materials and Applications
The emerging advances in pyroelectric materials include various structures and performance, potential applications based on the pyroelectric effect. AbstractAs one important subclass of piezoelectric materials, pyroelectric materials have caused increasing attention owing to the unique pyroelectric effect induced by spontaneous polarization, showing broad promising application prospects due to various electrical responses induced by time-dependent temperature variation. This review systematically introduces the pyroelectric effect and evaluation of pyroelectric materials and follows by analyzing and concluding the novel pr...
Source: Small - October 21, 2021 Category: Nanotechnology Authors: Ding Zhang, Heting Wu, Chris R. Bowen, Ya Yang Tags: Review Source Type: research

Ion ‐Conductive Hydrogel‐Based Stretchable, Self‐Healing, and Transparent NO2 Sensor with High Sensitivity and Selectivity at Room Temperature
An intrinsically stretchable, self-healing, transparent, and ion-conductive hydrogel is utilized to fabricate NO2 gas sensors. The sensing mechanism reveals that the redox reaction of NO2 at the electrode –hydrogel interface induces current variation. The sensor exhibits high sensitivity (119.9%/ppm), ultralow limit of detection (86 ppt), good selectivity. Meanwhile, it can operate in both anaerobic and aerobic environments at room temperature. AbstractHere stretchable, self-healable, and transparent gas sensors based on salt-infiltrated hydrogels for high-performance NO2 sensing in both anaerobic environment and air...
Source: Small - October 21, 2021 Category: Nanotechnology Authors: Zixuan Wu, Limin Rong, Jinglan Yang, Yaoming Wei, Kai Tao, Yubin Zhou, Bo ‐Ru Yang, Xi Xie, Jin Wu Tags: Research Article Source Type: research

Molecular Engineering of Laser ‐Induced Graphene for Potential‐Driven Broad‐Spectrum Antimicrobial and Antiviral Applications
This study highlights the synergy of surface potential and photothermal effect in the inactivation of pathogens and it provides a direction for designing porous materials for airborne disease removal and water disinfection. (Source: Small)
Source: Small - October 21, 2021 Category: Nanotechnology Authors: Meijia Gu, Libei Huang, Zhaoyu Wang, Weihua Guo, Le Cheng, Yuncong Yuan, Zhou Zhou, Liu Hu, Sijie Chen, Chao Shen, Ben Zhong Tang, Ruquan Ye Tags: Research Article Source Type: research

Starch Capped Atomically Thin CuS Nanocrystals for Efficient Photothermal Therapy
This study not only presents a new type of photothermally highly efficient ultrathin CuS NCs, but also offers in-depth LSPR modeling investigations useful for other photothermal nanomaterial designs. (Source: Small)
Source: Small - October 21, 2021 Category: Nanotechnology Authors: Zhiyong Zheng, Ping Yu, Huili Cao, Mengyu Cheng, Thomas Zhou, Li E. Lee, Jens Ulstrup, Jingdong Zhang, Christian Engelbrekt, Lixin Ma Tags: Research Article Source Type: research

Photoactivated Self ‐Disassembly of Multifunctional DNA Nanoflower Enables Amplified Autophagy Suppression for Low‐Dose Photodynamic Therapy
An efficient autophagy suppressor is constructed for improving the therapeutic effect of low-dose photodynamic therapy, which can perform photoactivated burst release of oligonucleotide drug by self-disassembly of DNA nanostructure to achieve amplifiedATG5 gene silencing for enhancing antitumor effect. AbstractLow-dose photodynamic therapy (PDT) holds great promise for reducing undesired patient photosensitivity in cancer treatment. Yet, its therapeutic effect is significantly affected by intracellular cytoprotective processes, such as autophagy. Here, an efficient autophagy suppressor is developed, which is a multifunctio...
Source: Small - October 21, 2021 Category: Nanotechnology Authors: Jinjin Shi, Danyu Wang, Yanrui Ma, Jingwen Liu, Yanan Li, Rashed Reza, Zhenzhong Zhang, Junjie Liu, Kaixiang Zhang Tags: Research Article Source Type: research

Recent Advanced Development of Artificial Interphase Engineering for Stable Sodium Metal Anodes
Solid electrolyte interphase on the Na anode surface largely determines the deposition behavior of Na anode. This review article is aimed to address the prospects of the artificial interphase engineering by solving the drawbacks of Na metal anodes. AbstractA solid electrolyte interphase (SEI) on a sodium (Na) metal anode strongly affects the Na deposition morphology and the cycle life of Na metal batteries (SMBs). SMB applications are hindered by an unstable SEI and dendrite growth on the Na anode surface, which directly cause low coulombic efficiency and can even lead to safety issues. An artificial interface layer can st...
Source: Small - October 21, 2021 Category: Nanotechnology Authors: Tian Wang, Yongbin Hua, Zhanwei Xu, Jae Su Yu Tags: Review Source Type: research

Optimized Methodology for the Calculation of Electrostriction from First ‐Principles
A new method for the calculation of electrostrictive properties using density functional theory is presented, validated, and compared with existing methods. The method, which relies on density functional perturbation theory, exhibits significant advantages of efficiency, robustness, ease of use, and clarity over previous finite-field based methodologies. Applications, including the decomposition of the electrostriction tensor in BaZrO3 are shown. AbstractIn this work a new method for the calculation of the electrostrictive properties of materials using density functional theory is presented. The method relies on the thermo...
Source: Small - October 21, 2021 Category: Nanotechnology Authors: Daniel S. P. Tanner, Eric Bousquet, Pierre ‐Eymeric Janolin Tags: Research Article Source Type: research

A Novel Cascade Nanoreactor Integrating Two ‐Dimensional Pd‐Ru Nanozyme, Uricase and Red Blood Cell Membrane for Highly Efficient Hyperuricemia Treatment
A cascade nanoreactor, Pd-Ru/Uricase@RBC, is fabricated by integrating Pd-Ru with uricase and red blood cell (RBC) membrane for hyperuricemia therapy. By combining uricase activity with the catalase-like activity of Pd-Ru, the Pd-Ru/Uricase@RBC can effectively degrade uric acid to allantoin and H2O2, and subsequently catalyze the product H2O2 to O2, thereby realizing safe and efficient hyperuricemia treatment. AbstractNanozyme-based cascade reaction has emerged as an effective strategy for disease treatment because of its high efficiency and low side effects. Herein, a new and highly active two-dimensional Pd-Ru nanozyme i...
Source: Small - October 20, 2021 Category: Nanotechnology Authors: Jiang Ming, Tianbao Zhu, Jingchao Li, Zichen Ye, Changrong Shi, Zhide Guo, Jingjuan Wang, Xiaolan Chen, Nanfen Zheng Tags: Research Article Source Type: research

Highly Poison ‐Resistant Single‐Atom Co–N4 Active Sites with Superior Operational Stability over 460 h for H2S Catalytic Oxidation
Herein, isolated cobalt atoms anchored on a porous tri-s-triazine based NC framework are prepared by an efficient synthesis method. The as-synthesized single-atom Co –N4 catalysts exhibit remarkable catalytic activity for H2S selective oxidation. This outcome not only offers a competitive oxidative desulfurization catalyst, but also inspires the fundamental understanding of the underlying structure –activity relationships of the catalysts. AbstractEfficient catalytic elimination of hydrogen sulfide (H2S) with high activity and durability in nature gas and blast-furnace gas is very critical for both fundamental ...
Source: Small - October 20, 2021 Category: Nanotechnology Authors: Ganchang Lei, Yawen Tong, Lijuan Shen, Yong Zheng, Shijing Liang, Wei Lin, Fujian Liu, Yanning Cao, Yihong Xiao, Lilong Jiang Tags: Research Article Source Type: research

Multifunctional Carbon Nanocomposites as Nanoneurons from Multimode and Multianalyte Sensing to Molecular Logic Computing, Steganography, and Cryptography
Carbon nanoparticles derived from biowastes via physically exfoliation method are employed as reducing agents and stabilizers for one-step and green synthesis of multifunctional silver –carbon nanocomposites, which own antibacterial ability and show wonderful applications in multiplexed sensing, molecular logic, and molecular crypto-steganography due to the stimuli-responsive nanoneuron behaviors producing five signal modes when inputting hydrogen peroxide, ascorbic acid, and do pamine. AbstractInspired by information exchange and logic functions of life based on molecular recognition and interaction networks, ongoin...
Source: Small - October 20, 2021 Category: Nanotechnology Authors: Qing Feng Yao, Min Xia Quan, Jin Hua Yang, Qing Yu Liu, Zhen Qi Bu, Wei Tao Huang Tags: Research Article Source Type: research

Synergistic Dual ‐Atom Molecular Catalyst Derived from Low‐Temperature Pyrolyzed Heterobimetallic Macrocycle‐N4 Corrole Complex for Oxygen Reduction
The identification of metal –N4 active sites based on non-precious electrocatalysts for the cathodic oxygen reduction reaction (ORR) to reduce the cost of low-temperature fuel cells is highly challenging. Herein, the authors have newly developed a defined heterobimetallic (Co–Fe) center preserved by low-temperature pyrolys is of its pristine macrocycle-N4 corrole integrated on multi-walled carbon nanotubes for enhanced ORR performance. AbstractA heterobimetallic corrole complex, comprising oxygen reduction reaction (ORR) active non-precious metals Co and Fe with a corrole-N4 center (PhFCC), is successfully synt...
Source: Small - October 19, 2021 Category: Nanotechnology Authors: Satyanarayana Samireddi, V. Aishwarya, Indrajit Shown, Saravanakumar Muthusamy, Sreekuttan M. Unni, Ken ‐Tsung Wong, Kuei‐Hsien Chen, Li‐Chyong Chen Tags: Research Article Source Type: research

Calcium Peroxide Nanoparticles ‐Embedded Coatings on Anti‐Inflammatory TiO2 Nanotubes for Bacteria Elimination and Inflammatory Environment Amelioration
A dual drug-loading system on titanium implants is developed. The catechol motif-modified methacrylated gelatin hydrogel encapsulates calcium peroxide nanoparticles and adheres to IL-4 loaded TiO2 nanotubes. It efficiently eliminates S. aureus contamination and induces M2 phenotype polarization of macrophages both in vitro and in vivo. Moreover, it effectively inhibits pro-inflammatory response of the infected tissue and improves tissue regeneration. AbstractImplant-associated bacterial infections significantly impair the integration between titanium and soft tissues. Traditional antibacterial modifications of titanium imp...
Source: Small - October 19, 2021 Category: Nanotechnology Authors: Ye He, Ke Li, Xin Yang, Jin Leng, Kun Xu, Zhang Yuan, Chuanchuan Lin, Bailong Tao, Xuan Li, Jingwei Hu, Liangliang Dai, Ryan Becker, Tony Jun Huang, Kaiyong Cai Tags: Research Article Source Type: research

Development of Conductive Hydrogels for Fabricating Flexible Strain Sensors
Conductive hydrogels are extensively studied in the field of strain sensors due to their conductivity, mechanical properties, self-healing, and anti-freezing properties, which allow strain sensors to show excellent performance even at subzero temperatures. This review summarizes the properties of conductive hydrogels and their application in the fabrication of strain sensors working in different modes. AbstractConductive hydrogels can be prepared by incorporating various conductive materials into polymeric network hydrogels. In recent years, conductive hydrogels have been developed and applied in the field of strain sensor...
Source: Small - October 19, 2021 Category: Nanotechnology Authors: Gang Li, Chenglong Li, Guodong Li, Dehai Yu, Zhaoping Song, Huili Wang, Xiaona Liu, Hong Liu, Wenxia Liu Tags: Review Source Type: research

Strained Endotaxial PbS Nanoprecipitates Boosting Ultrahigh Thermoelectric Quality Factor in n ‐Type PbTe As‐Cast Ingots
An ideal thermoelectric material requests a weak coupling between charge and phonon transport, i.e., a high thermoelectric quality factorµ/ κL. In this work an interesting periodically strained PbS/PbTe phase boundary of nanometer scale is designed and it is demonstrated that its special strain distribution is in favor of achieving this goal. AbstractLead telluride (PbTe) has long been regarded as an excellent thermoelectric material at intermediate temperature range (573 –873 K); however, n-type PbTe's performance is always relatively inferior to its p-type counterpart mainly due to their different elect...
Source: Small - October 18, 2021 Category: Nanotechnology Authors: Shixuan Liu, Yong Yu, Di Wu, Xiao Xu, Xiaolian Chao, Zupei Yang, Jiaqing He Tags: Research Article Source Type: research

3D Printed Scaffolds for Monolithic Aerogel Photocatalysts with Complex Geometries
Macroscopically sized nanoparticle-based aerogel monoliths are optimized for photocatalytic methanol reforming by introducing 3D printed polymeric scaffolds. The careful design of the scaffolds allows studying gas flow through and ultraviolet light penetration into the aerogels. Matching the geometry of the photocatalyst with that of the flow reactor results in a maximized hydrogen production rate of 1200 µmol g−1 h−1. AbstractMonolithic aerogels composed of crystalline nanoparticles enable photocatalysis in three dimensions, but they suffer from low mechanical stability and it is difficult to p...
Source: Small - October 18, 2021 Category: Nanotechnology Authors: Murielle Schreck, Nicole Kleger, Fabian Matter, Junggou Kwon, Elena Tervoort, Kunal Masania, Andr é R. Studart, Markus Niederberger Tags: Research Article Source Type: research

Acoustofluidic Droplet Sorter Based on Single Phase Focused Transducers
Single phase focused transducer (SPFT) is a novel acoustofluidic tool for droplet sorting, using a unique interdigital transducer design. The capability of the SPFT to generate high acoustic intensities enables high efficiency cell-laden droplet sorting with a low input voltage and a high biocompatibility. This new sorting technology shows significant potential as a tool for droplet-based screening and analysis. AbstractDroplet microfluidics has revolutionized the biomedical and drug development fields by allowing for independent microenvironments to conduct drug screening at the single cell level. However, current microfl...
Source: Small - October 18, 2021 Category: Nanotechnology Authors: Ruoyu Zhong, Shujie Yang, Giovanni Stefano Ugolini, Ty Naquin, Jinxin Zhang, Kaichun Yang, Jianping Xia, Tania Konry, Tony Jun Huang Tags: Research Article Source Type: research

Chiral Nematic Coatings Based on Cellulose Nanocrystals as a Multiplexing Platform for Humidity Sensing and Dual Anticounterfeiting
A novel chiral nematic structure-regulation approach-charge-driven coordinated pitch-regulation system is introduced to assemble cellulose nanocrystal-based stimuli-responsive coatings. The proposed system endows a high anisotropic dissymmetry (>0.3), sensitivity (13.1 nm/1% at 68 –75% relative humidity, RH) and tunable transmitted colors (blue to orange) at given rotation angles (RA) for these coatings, which integrates in a “RH-RA-color” ternary code suitable for anticounterfeiting and humidity-responsiveness. AbstractThe need for a precise regulation of the properties of chiral nematic structures in...
Source: Small - October 18, 2021 Category: Nanotechnology Authors: Guomin Zhao, Yanping Huang, Changtong Mei, Shengcheng Zhai, Yan Xuan, Zhipeng Liu, Mingzhu Pan, Orlando J. Rojas Tags: Research Article Source Type: research

Carbon Yarn ‐Ball‐Entangled SiO2 Anode with Excellent Electrochemical Performance for Lithium‐Ion Batteries
Nanoscale SiO2 closely adheres to entangled carbon wires, creating a micrometer-sized yarn-ball-like secondary particle. The carbon yarn-ball structure provides a network of electron conduction highways and accommodates the large volume expansion of SiO2. Greatly enhanced conductivity and structural stability give rise to excellent electrochemical performance during high-rate charge/discharge cycling. AbstractVarious nanoscale SiO2 and their composites have demonstrated superior electrochemical performance as anodes for lithium-ion batteries. However, both the battery production and real applications require the integratio...
Source: Small - October 16, 2021 Category: Nanotechnology Authors: Dan Wang, Tongshuai Wang, Miao He, Ting Wang, Hailong Wang Tags: Research Article Source Type: research

Ultrastretchable, Adhesive, and Antibacterial Hydrogel with Robust Spinnability for Manufacturing Strong Hydrogel Micro/Nanofibers
The ultrastretchable hydrogel of adhesion and antimicrobial activity is designed with robust spinnability for manufacturing hydrogel micro/nanofibers with excellent mechanical properties (tensile stress: 422.0  MPa, strain: 86.5%, Young's modulus: 8.7 GPa, and toughness: 281.6 MJ m−3). AbstractThe ultrastretchable (over 12  400%) hydrogel with long-lasting adhesion, strong antibacterial activity, and robust spinnability is developed based on the oxidative decarboxylation and quinone-catechol reversible redox reaction induced by Ag-lignin nanoparticles in a precursor solution containing citric acid...
Source: Small - October 16, 2021 Category: Nanotechnology Authors: Xiao He, Zhangkang Li, Jia Li, Dinesh Mishra, Yuxuan Ren, Ian Gates, Jinguang Hu, Qingye Lu Tags: Research Article Source Type: research

Ultrathin Twisted Germanium Sulfide van der Waals Nanowires by Bismuth Catalyzed Vapor –Liquid–Solid Growth
Germanium sulfide (GeS) van der Waals nanowires are of interest for twistronics due to their tunable interlayer twist. Using Bi as a vapor –liquid–solid growth catalyst extends the accessible diameters of GeS nanowires down to ≈15 nm while maintaining tens of µm in length. The ultrathin nanowires carry screw dislocations, are chiral, achieve high twist rates, and show pronounced quantum confinement. Abstract1D nanowires of 2D layered crystals are emerging nanostructures synthesized by combining van der Waals (vdW) epitaxy and vapor –liquid–solid (VLS) growth. Nanowires of the group ...
Source: Small - October 16, 2021 Category: Nanotechnology Authors: Eli Sutter, Peter Sutter Tags: Research Article Source Type: research

Bi ‐Functional Fe3O4/Au/CoFe‐LDH Sandwich‐Structured Electrocatalyst for Asymmetrical Electrolyzer with Low Operation Voltage
A bi-functional Fe3O4/Au/CoFe-LDH sandwich-structured catalyst is used in an asymmetrical electrochemical cell for electrocatalytic hydrogen evolution reaction (HER) and glucose oxidation reaction (GOR) in alkali solution. 10  mA cm−2 current density is achieved by a cell voltage of 0.48  V. 89.7% selectivity of GOR is maintained even at 1000 mA cm−2. AbstractThe reduction of the overall electrolysis potential to produce hydrogen is a critical target for fabricating applicable hydrogen evolution cells. Sandwich-structured Fe3O4/Au/CoFe-LDH is synthesized via a spontaneous galvanic displacement re...
Source: Small - October 16, 2021 Category: Nanotechnology Authors: Fengchao Sun, Yan Zhou, Zihan You, Hanhan Xia, Yongxiao Tuo, Shutao Wang, Cuiping Jia, Jun Zhang Tags: Research Article Source Type: research

Nanoarrays of Individual Liposomes and Bacterial Outer Membrane Vesicles by Liftoff Nanocontact Printing
Liposomes and extracellular vesicles are captured in nanoscale arrays via their surface biomarkers. Capture is enabled by creating antibody and toxin nanodot arrays with liftoff nanocontact printing. The nanodots are ≈425 nm in diameter, resulting in a maximum of one captured particle per nanodot. Individual particle resolution is maintained, and the number of particles per unit area is maximized. AbstractAnalytical characterization of small biological particles, such as extracellular vesicles (EVs), is complicated by their extreme heterogeneity in size, lipid, membrane protein, and cargo composition. Analysis o...
Source: Small - October 16, 2021 Category: Nanotechnology Authors: Jennie L. Cawley, Megan E. Blauch, Shannon M. Collins, Justin B Nice, Qing Xie, Luke R. Jordan, Angela C. Brown, Nathan J. Wittenberg Tags: Research Article Source Type: research

Octopus ‐Type Crown‐Bisphthalocyaninate Anchor for Bottom‐Up Assembly of Supramolecular Bilayers with Expanded Redox‐Switching Capability
A new heteroleptic bisphthalocyaninate with one ligand bearing eight thioacetate terminated “tentacles” and one tetra-crown substituted ligand is synthesized. Self-assembled monolayer based on this complex is formed on gold. Supramolecular crown-ether–potassium interaction is then used to append tetra-crown-phthalocyanine adlayer that provides another available redox-state in the nan oscale system, totaling four, which can all be read-out optically. AbstractAchievement of information storage at molecular level remains a pressing task in miniaturization of computing technology. One of the promising approac...
Source: Small - October 16, 2021 Category: Nanotechnology Authors: Alexander V. Shokurov, Alexey V. Yagodin, Alexander G. Martynov, Yulia G. Gorbunova, Aslan Yu. Tsivadze, Sofiya L. Selektor Tags: Research Article Source Type: research

Enhanced Efficiency and Excellent Thermostability in Organic Photovoltaics via Ternary Strategy with Twisted conjugated Compound
The TBD-PDI-C11-Se (C11-Se) is introduced as a multifunctional component that can improve the crystallinity of PM6 and suppress the aggregation of the acceptor. High efficiency of 17.25% is achieved based on PM6:Y6 ternary device. Besides, C11-Se as a third component to improve both the efficiency and thermal stability simultaneously in the other three systems is reported. AbstractThe thermal stability of high-efficiency organic photovoltaics (OPVs) is critical to the manufacturing of this technology. Therefore, targeted strategies and approaches shall be developed to improve efficiency and stability, simultaneously. Herei...
Source: Small - October 16, 2021 Category: Nanotechnology Authors: Lifu Zhang, Heng Zhao, Ming Hu, Xinkang Wang, Lei Hu, Houdong Mao, Zhongyi Yuan, Wei Ma, Yiwang Chen Tags: Research Article Source Type: research

Bloch Surface Waves Mediated Micro ‐Spectroscopy
In this report, a new type of Bloch surface wave (BSW) based micro-spectrometer is proposed. A single silicon nanoparticle sitting on a dielectric multilayer substrate is used to excite the BSW which acts as a nanoscale unknown source. Taking advantage of the dispersion relations of BSWs, an abundant spectrally related database is formed that is useful for spectrum retrieval applications. Back-focal plane images are used to monitor the change of angular spectrum corresponding to the dispersion relationship of Bloch surface waves. Combined with an iterative algorithm, experimental retrieval of visible-range monochromatic an...
Source: Small - October 16, 2021 Category: Nanotechnology Authors: Ruxue Wang, Xinrui Lei, Li Liu, Longsheng Wu, Aimin Wu Tags: Research Article Source Type: research

Development and Evaluation of Sn Foil Anode for Sodium ‐Ion Batteries
Binder- and conducting agent- free Sn foil is studied as anode for sodium-ion batteries. The excellent electrochemical performance (high areal loading and superior cyclability) is obtained with aid of self-healing properties. In addition, full cell with Na3V2(PO4)3 cathode delivers excellent rate and cycling performance. This strategy is expected to facilitate the development of high-capacity anodes for high-energy-density sodium-ion batteries. AbstractMetal foil electrodes are simple to prepare and have a high active material loading, making them well suited for the fabrication of inexpensive high-energy-density batteries...
Source: Small - October 16, 2021 Category: Nanotechnology Authors: Changhyeon Kim, Huihun Kim, Milan K. Sadan, Minyeong Jeon, Gyubong Cho, Jouhyeon Ahn, Kiwon Kim, Kwonkoo Cho, Hyojun Ahn Tags: Research Article Source Type: research

Investigating Time ‐Dependent Active Motion of Janus Micromotors using Dynamic Light Scattering
In this work, the non-steady state active motion of Janus micromotors (JM) as a function of fuel concentration, JM concentration, and time after fuel addition is studied. Characterization by dynamic light scattering and the analyses presented provide new insights into the mechanism of active motion in non-steady state systems. AbstractAdvances in fabrication methods have positioned Janus micromotors (JMs) as candidates for use as autonomous devices in applications across diverse fields, spanning drug delivery to environmental remediation. While the design of most micromotors is straightforward, the non-steady state active ...
Source: Small - October 16, 2021 Category: Nanotechnology Authors: Alex McGlasson, Laura C. Bradley Tags: Research Article Source Type: research

Encapsulating Fe2O3 Nanotubes into Carbon ‐Coated Co9S8 Nanocages Derived from a MOFs‐Directed Strategy for Efficient Oxygen Evolution Reactions and Li‐Ions Storage
A unique yolk-shell structure of Fe2O3 nanotube@hollow Co9S8 nanocage@C is rationally designed and synthesized via engineering a Fe2O3 nanotube@ZIF-67 core-shell structure followed by chemical etching/anion exchange and carbonization at high temperature in sequence. This material exhibits outstanding electrocatalytic activity and stability for alkaline oxygen evolution reaction, and good high-rate capability as anode material of Li-ions batteries. AbstractThe development of high-efficiency, robust, and available electrode materials for oxygen evolution reaction (OER) and lithium-ion batteries (LIBs) is critical for clean a...
Source: Small - October 16, 2021 Category: Nanotechnology Authors: Shoushuang Huang, Zhiqiang Jin, Yanwei Ding, Ping Ning, Qiaochuan Chen, Jie Fu, Qian Zhang, Jie Zhang, Peijun Xin, Yong Jiang, Zhangjun Hu Tags: Research Article Source Type: research

Bimetallic ‐MOF‐Derived Amorphous Zinc/Cobalt–Iron‐Based Hollow Nanowall Arrays via Ion Exchange for Highly Efficient Oxygen Evolution
A controllable ion-exchange method to synthesize amorphous zinc/cobalt-iron hydroxide-based hollow nanowall arrays (A-Zn/Co-Fe HNAs) derived from bimetallic metal organic frameworks. The optimized nanostructure of A-Zn/Co-Fe HNAs delivers a low overpotential of 226 mV to reach a current density of 10 mA cm−2 with a small Tafel slope of 37.81 mV dec−1 and exhibits high durability over 80 h. AbstractOxygen evolution reaction (OER) is critical for optimizing renewable energy systems, including metal –air batteries and water electrolysis. One major challenge for OER is to develop durable and cost-effective el...
Source: Small - October 16, 2021 Category: Nanotechnology Authors: Zhengxiang Gu, Xuelian Wei, Xiaoqin Zhang, Zhengyu Duan, Zhongwei Gu, Qiyong Gong, Kui Luo Tags: Research Article Source Type: research

Unveiling the Actual Catalytic Sites in Nanozyme ‐Catalyzed Oxidation of o‐Phenylenediamine
In this report, mechanistic studies of nanozyme-catalyzed oxidation of OPD are performed and a distinguishably different mechanism from that of natural enzymes is found. A combination of Fourier transform infrared spectroscopy, nuclear magnetic resonance, electrospray ionization mass spectrometry, and electron microscopic studies provides compelling evidence that polymerization of OPD occurs on the surface of several different nanozymes. The unexpected polymerization causes a dense coating layer of poly(o-phenylenediamine) (POPD) on nanozymes renders the intrinsic properties of nanozymes. Therefore, this fundamental discov...
Source: Small - October 16, 2021 Category: Nanotechnology Authors: Lu Cheng, Fengxia Wu, Haibo Bao, Fenghua Li, Guobao Xu, Yongjun Zhang, Wenxin Niu Tags: Research Article Source Type: research

Constructing 3D Interconnected Si/SiOx/C Nanorings from Polyhedral Oligomeric Silsesquioxane
Polyhedral oligomeric silsesquioxane (POSS) has great potential for controllable and designable material preparation due to its organic –inorganic properties and unique molecular structure. In this work, POSS is introduced into the controllable preparation of functional carbon based nanomaterials, and 3D interconnected Si/SiOx/C nanoring with uniform diameter are successfully prepared by the “bottom-up” strategy. AbstractPolyhedral oligomeric silsesquioxane (POSS) is a family of organic/inorganic hybrid materials with specific molecular symmetry, and shows great potential in the structural design of nanom...
Source: Small - October 15, 2021 Category: Nanotechnology Authors: Xieji Lin, Xinjian Chen, Fan Zhang, Yue Dong, Xiaohong Chen, Ang Li, Huaihe Song Tags: Research Article Source Type: research