Al2O3 ‐Assisted Confinement Synthesis of Oxide/Carbon Hollow Composite Nanofibers and Application in Metal‐Ion Capacitors
A thin and homogeneous atomic ‐layer‐deposition Al2O3 layer is applied to confine the pyrolysis of precursor fibers, which transform into metal (or metal oxide) –carbon composite hollow fibers after removal of Al2O3. The obtained freestanding hollow fibers may have a wider application than the metal ‐ion capacitor that is demonstrated in this article. AbstractHollow micro ‐/nanostructures are widely explored for energy applications due to their unique structural advantages. The synthesis of hollow structures generally involves a “top‐down” casting process based on hard or soft templates. Herein,...
Source: Small - July 9, 2020 Category: Nanotechnology Authors: Zhifei Mao, Huanwen Wang, Dongliang Chao, Rui Wang, Beibei He, Yansheng Gong, Hong Jin Fan Tags: Full Paper Source Type: research

Endosomal Escape of Polymer ‐Coated Silica Nanoparticles in Endothelial Cells
Smart materials have attracted significant attention due to their ability to modulate the surrounding environment. However, in the biological context, they cannot be presumed inert. A set of parameters to assess biological function following endosomal disruption and escape of polymer ‐coated silica nanoparticles is provided. This analysis provides insight into the recovery of endothelial cells following nanoparticle insult. AbstractCurrent investigations into hazardous nanoparticles (i.e., nanotoxicology) aim to understand the working mechanisms that drive toxicity. This understanding has been used to predict the biologi...
Source: Small - July 9, 2020 Category: Nanotechnology Authors: Alessandro Parodi, Michael Evangelopoulos, Noemi Arrighetti, Armando Cevenini, Megan Livingston, Sm Z. Khaled, Brandon S. Brown, Iman K. Yazdi, Francesca Paradiso, Jocelyn N. Campa ‐Carranza, Alessandro De Vita, Francesca Taraballi, Ennio Ta Tags: Full Paper Source Type: research

Artificial Biology: Molecular Design and Cell Mimicry
Small, Volume 16, Issue 27, July 9, 2020. (Source: Small)
Source: Small - July 9, 2020 Category: Nanotechnology Authors: Alexander N. Zelikin, Brigitte St ädler Tags: Editorial Source Type: research

Synthetic Antibodies: Molecularly Imprinted Synthetic Antibodies: From Chemical Design to Biomedical Applications (Small 27/2020)
In article numberhttps://doi.org/10.1002/smll.2019066441906644, Guoqing Pan and co ‐workers comprehensively discuss the recent progress of molecularly imprinted synthetic antibodies (MISAs) from fundamental chemical design to their emerging biomedical applications. Meanwhile, the possibility of MISAs as qualified substitutes or even to transcend the performance of natural antibo dies is discussed from the perspective of frontier needs in biomedicine. (Source: Small)
Source: Small - July 9, 2020 Category: Nanotechnology Authors: Jingjing Xu, Haohan Miao, Jixiang Wang, Guoqing Pan Tags: Inside Front Cover Source Type: research

Artificial Biology: Artificial Biology: Molecular Design and Cell Mimicry (Small 27/2020)
Artificial biology is a cross ‐disciplinary field that aims to mimic/reconstruct the function of natural macromolecules, organelles, cells, and small life forms, using synthetic tools. The articles in this Special Issue provide a multi‐angled view on artificial biology across the length‐scales from synthetic mimics of enzy mes and antibodies to micromotors, organelles, cells, and artificial tissues. The Special Issue is introduced in article numberhttps://doi.org/10.1002/smll.2020034422003442 by guest editors Alexander N. Zelikin and Brigitte St ädler. (Source: Small)
Source: Small - July 9, 2020 Category: Nanotechnology Authors: Alexander N. Zelikin, Brigitte St ädler Tags: Cover Picture Source Type: research

Micro ‐/Nanomotors: Micro‐/Nanomotors toward Biomedical Applications: The Recent Progress in Biocompatibility (Small 27/2020)
In article numberhttps://doi.org/10.1002/smll.2019061841906184, Yingfeng Tu, Fei Peng, and co ‐workers highlight the recent progress of biocompatible micro‐/nanomotor systems and their applications in the biomedical field. By summarizing the effort that has been made for the biocompatibility of micro‐/nanomotors during the past decade, it is expected that the real‐world application o f micro‐/nanomotors in biomedicine will be further developed. (Source: Small)
Source: Small - July 9, 2020 Category: Nanotechnology Authors: Juanfeng Ou, Kun Liu, Jiamiao Jiang, Daniela A. Wilson, Lu Liu, Fei Wang, Shuanghu Wang, Yingfeng Tu, Fei Peng Tags: Back Cover Source Type: research

3D Printing: Shaping Giant Membrane Vesicles in 3D ‐Printed Protein Hydrogel Cages (Small 27/2020)
In article numberhttps://doi.org/10.1002/smll.2019062591906259, Petra Schwille and co ‐workers demonstrate 3D printing of a microscale device made of a biocompatible protein hydrogel that can be used to induce reversible shape changes in trapped vesicles by pH‐stimulus. These soft material‐based cages provide an artificial microenvironment, which may in the future allow us to i nvestigate how synthetic cells react to and interact with external mechanical cues. (Source: Small)
Source: Small - July 9, 2020 Category: Nanotechnology Authors: Haiyang Jia, Thomas Litschel, Michael Heymann, Hiromune Eto, Henri G. Franquelim, Petra Schwille Tags: Inside Back Cover Source Type: research

Masthead: (Small 27/2020)
Small, Volume 16, Issue 27, July 9, 2020. (Source: Small)
Source: Small - July 9, 2020 Category: Nanotechnology Tags: Masthead Source Type: research

Visualizations of Mercury Methylation and Dynamic Transformations by In Vivo Imaging
The visualization of mercury methylation and dynamic transformations of Hg(II) and MeHg are achieved in living biological systems by imaging. With a double ‐response fluorescent probe (DPAHB), well distinguishable responses (blue emission for Hg(II), yellow emission for MeHg without any interference) are observed, which innovatively accomplish simultaneous sensing of both species for in vivo examination. AbstractVisualization of Hg(II) and MeHg in their native contexts is significant for examining mercury poisoning, while it is challenging because of indistinguishable fluorescent (FL) signals during FL imaging. Herein, v...
Source: Small - July 8, 2020 Category: Nanotechnology Authors: Qiang Fu, Xuchan Fan, Jianghui Sun, Hongwei Tan, Yan Wang, Jin Ouyang, Na Na Tags: Full Paper Source Type: research

Recent Advances on Self ‐Supported Arrayed Bifunctional Oxygen Electrocatalysts for Flexible Solid‐State Zn–Air Batteries
Recent advances on the application of nanoarrayed bifunctional oxygen electrocatalysts as air cathodes for flexible solid ‐state Zn–air batteries are reviewed. Various arrayed bifunctional oxygen electrocatalysts, including carbonaceous material arrays, transition metal compound arrays, and transition metals/carbon arrays transition metal compounds/carbon arrays, and their applications in Zn–air batteries with tw o configurations (i.e., planar stacks and cable fibers), are discussed. AbstractFlexible solid ‐state Zn–air batteries have been rapidly developed benefiting from the uprising demand for wear...
Source: Small - July 8, 2020 Category: Nanotechnology Authors: Yijie Wang, Qinghe Cao, Cao Guan, Chuanwei Cheng Tags: Review Source Type: research

Mechano ‐Informed Biomimetic Polymer Scaffolds by Incorporating Self‐Powered Zinc Oxide Nanogenerators Enhance Motor Recovery and Neural Function
In this study, a piezoelectric zinc oxide nanogenerator scaffold is manufactured by 3D injectable multilayer biofabrication. The piezoelectric polymeric scaffold displays desirable mechanical and physical characteristics, such as aligned porosity, high elasticity, scaffold stiffness, surface energy, and excellent shear behavior. In addition, its biocompatibility supplies Schwann cells with an adhesive, proliferative, and angiogenic interface, as is reflected by higher expression of functional proteins including nerve growth factor (NGF) and vascular endothelial growth factor (VEGF). In vivo mechanical stimuli by treadmill ...
Source: Small - July 7, 2020 Category: Nanotechnology Authors: Yun Qian, Yuan Cheng, Jialin Song, Yang Xu, Wei ‐En Yuan, Cunyi Fan, Xianyou Zheng Tags: Full Paper Source Type: research

Smartdust 3D ‐Printed Graphene‐Based Al/Ga Robots for Photocatalytic Degradation of Explosives
Water ‐driven 3D‐printed graphene‐based smartdust robots provide added insight into the large‐scale fabrication, easy functionalization, and propulsion of tiny robots for environmental applications using novel photocatalysts. AbstractMilli/micro/nanorobots are considered smart devices able to convert energy taken from different sources into mechanical movement and accomplish the appointed tasks. Future advances and realization of these tiny devices are mostly limited by the narrow window of material choices, the fuel requirement, multistep surface functionalization, rational structural design, and propulsion abilit...
Source: Small - July 7, 2020 Category: Nanotechnology Authors: Bahareh Khezri, Katherine Villa, Filip Novotn ý, Zdeněk Sofer, Martin Pumera Tags: Full Paper Source Type: research

The Nanomechanical Bit
The potential of nanomechanical devices for nanomechanical memory and logic operations is considered. Various device approaches are discussed including nano ‐electromechanical systems in silicon and carbon nano‐tube switches, and combinations of nanomechanical resonators. With their scalability, robustness, and outstanding power efficiency, a new avenue for computing devices is naturally expected in conjunction with quantum mechanical circuits. AbstractThe applicability of nanomechanical devices for computational approaches is reviewed. The focus is on the representation and processing of information based on nanomecha...
Source: Small - July 6, 2020 Category: Nanotechnology Authors: Chulki Kim, Robert Marsland, Robert H. Blick Tags: Review Source Type: research

Efficient Oxygen Evolution and Gas Bubble Release Achieved by a Low Gas Bubble Adhesive Iron –Nickel Vanadate Electrocatalyst
Vanadate anionic modification boosts the intrinsic activity of Fe and Ni active sites and surface wettability of FeNi catalyst for advanced oxygen evolution reaction. Operando Raman electrospectroscopy reveals the in situ formation of β‐NiOOH and γ‐FeOOH active phases in the presence of vanadate poly‐oxo‐anions during the oxygen evolution reaction. Operando dynamic specific resistance measurement depicts accelerated gas bubble dissipation via vanadate‐modification. AbstractSurface chemistry is a pivotal prerequisite besides catalyst composition toward advanced water electrolysis. Here, an evident enhan...
Source: Small - July 6, 2020 Category: Nanotechnology Authors: Kamran Dastafkan, Quentin Meyer, Xianjue Chen, Chuan Zhao Tags: Full Paper Source Type: research

Dual pH/ROS ‐Responsive Nanoplatform with Deep Tumor Penetration and Self‐Amplified Drug Release for Enhancing Tumor Chemotherapeutic Efficacy
Multiple physiological and pathological barriers have greatly limited the application of nanomedicine in clinical settings. Herein, a pH/reactive oxygen species dual ‐responsive drug delivery system is synthesized which can achieve prolonged blood circulation, deep tumor penetration, active‐targeting of cancer cells, endosome/lysosome escape and intracellular selectivity self‐amplified drug release. This drug delivery system provides a strategy for effecti ve cancer therapy. AbstractPoor deep tumor penetration and incomplete intracellular drug release remain challenges for antitumor nanomedicine application in clinic...
Source: Small - July 6, 2020 Category: Nanotechnology Authors: Yongfei Li, Mie Chen, Bowen Yao, Xun Lu, Boyang Song, Shauna N. Vasilatos, Xiang Zhang, Xiaomei Ren, Chang Yao, Weihe Bian, Lizhu Sun Tags: Full Paper Source Type: research

Hierarchical Nanorods of MoS2/MoP Heterojunction for Efficient Electrocatalytic Hydrogen Evolution Reaction
Nanorod ‐like hierarchical MoS2/MoP heterojunctions are synthesized via MoO3 nanorods as the starting sacrificial template. The obtained H ‐MoS2/MoP has high stability and excellent HER activity, due to optimized electronic structure of S and decreased free energy of H adsorption. AbstractHierarchical nanostructures with tailored component and architectures are attractive for energy ‐related applications. Here, the delicate design and construction of hierarchical MoS2/MoP (H ‐MoS2/MoP) nanorods for the hydrogen evolution reaction (HER) are demonstrated. This multiscale design rationally combines the compositional a...
Source: Small - July 6, 2020 Category: Nanotechnology Authors: Qian Liu, Ziqian Xue, Baoming Jia, Qinglin Liu, Kang Liu, Yiyang Lin, Min Liu, Yinle Li, Guangqin Li Tags: Communication Source Type: research

Suppression of Persistent Photoconductivity of Rubrene Crystals using Gate ‐Tunable Rubrene/Bi2Se3 Diodes with Photoinduced Negative Differential Resistance
This work demonstrates an effective strategy to suppress the persistent photoconductivity in rubrene crystals by using rubrene/Bi2Se3 heterojunctions. The photoresponse speed is significantly reduced for more than two orders (from over 10  s to 54 ms), meanwhile the photoresponsivity is 124 A W−1. The heterojunction transistor also exhibits photoinduced negative differential resistance and gate ‐tunable backward‐like diode behavior. AbstractOrganic single ‐crystalline semiconductors show great potential in high‐performance photodetectors. However, they suffer from persistent photoconductivity (PPC) ...
Source: Small - July 6, 2020 Category: Nanotechnology Authors: Ke Pei, Fakun Wang, Wei Han, Sanjun Yang, Kailang Liu, Kewei Liu, Huiqiao Li, Tianyou Zhai Tags: Full Paper Source Type: research

Temperature ‐Dependent Tip‐Induced Motion of Ga Adatom on GaAs (110) Surface
Temperature dependent adsorption sites and tip ‐induced motions of Ga adatoms on a semiconductor GaAs (110) surface are explored in a real space image using scanning tunneling microscopy (STM). The surface adsorption potential profile of the Ga adatom on the GaAs (110) obtained by first‐principles calculations successfully demonstrates oberv ed temperature depending phenomena. AbstractThe temperature ‐dependent tip‐induced‐motion of a Ga adatom on a GaAs (110) surface is experimentally demonstrated using scanning tunneling microscopy (STM). The surface adsorption energy profile obtained by first‐principle elect...
Source: Small - July 2, 2020 Category: Nanotechnology Authors: Shigeru Kaku, Junji Yoshino Tags: Full Paper Source Type: research

Respiration Monitoring: From Molecular Reconstruction of Mesoscopic Functional Conductive Silk Fibrous Materials to Remote Respiration Monitoring (Small 26/2020)
In article numberhttps://doi.org/10.1002/smll.2020002032000203, Xiang Yang Liu and co ‐workers meso‐reconstruct silkworm silk fibrous materials based on carbon nanotubes which give rise to conductive silk fibers, for the fabrication of silk flexible electronics. They have humidity dependent conductivity and can be developed into biocompatible electronic humidity sensors. The comb ination with cloud computation and big data leads to remote monitoring and diagnosis of respiration and other physiological conditions. (Source: Small)
Source: Small - July 2, 2020 Category: Nanotechnology Authors: Liyun Ma, Qiang Liu, Ronghui Wu, Zhaohui Meng, Aniruddha Patil, Rui Yu, Yun Yang, Shuihong Zhu, Xuwei Fan, Chen Hou, Yanran Li, Wu Qiu, Lianfen Huang, Jun Wang, Naibo Lin, Yizao Wan, Jian Hu, Xiang Yang Liu Tags: Back Cover Source Type: research

Perovskite Photodetectors: Sensitive and Stable Tin –Lead Hybrid Perovskite Photodetectors Enabled by Double‐Sided Surface Passivation for Infrared Upconversion Detection (Small 26/2020)
In article numberhttps://doi.org/10.1002/smll.2020015342001534, Liang Shen and co ‐workers demonstrate a sensitive and stable Sn‐Pb perovskite photodetector, employing phenethylammonium iodide to complete defects passivation aiming the top and bottom of films. The double‐sided surface passivation engineering can promote the grain growth, reduce the density of trap states an d improve surface hydrophobicity. Finally, it realizes infrared up‐conversion application for visualization. (Source: Small)
Source: Small - July 2, 2020 Category: Nanotechnology Authors: Yan Zhao, Chenglong Li, Jizhong Jiang, Boming Wang, Liang Shen Tags: Inside Back Cover Source Type: research

Enzyme Sampling: Temporal Sampling of Enzymes from Live Cells by Localized Electroporation and Quantification of Activity by SAMDI Mass Spectrometry (Small 26/2020)
In article numberhttps://doi.org/10.1002/smll.2020005842000584, Milan Mrksich, Horacio D. Espinosa, and co ‐workers report on a method for non‐destructively sampling enzymes multiple times from small populations of cells, using localized electroporation in microfluidic live cell analysis devices. The enzymes are captured in extraction chambers, where they modify immobilized substrates on a self‐ass embled monolayer, and their activity is quantified using self‐assembled monolayers for matrix‐assisted laser desorption/ionization (SAMDI) mass spectrometry. (Source: Small)
Source: Small - July 2, 2020 Category: Nanotechnology Authors: Prithvijit Mukherjee, Eric J. Berns, Cesar A. Patino, Elamar Hakim Moully, Lingqian Chang, S. Shiva P. Nathamgari, John A. Kessler, Milan Mrksich, Horacio D. Espinosa Tags: Inside Front Cover Source Type: research

Carbon Nanothorn Arrays: One ‐Step Preparation of Highly Durable Superhydrophobic Carbon Nanothorn Arrays (Small 26/2020)
In article numberhttps://doi.org/10.1002/smll.2019070131907013, Changshui Huang and co ‐workers directly prepare the methyl substituted graphdiyne nanothorn arrays (MGDY NTAs) on a variety of substrates by a one‐step method, which shows superhydrophobic properties, and high durability. The MGDY NTAs can be applied in the fields of metal corrosion protection and oil–water separat ion. (Source: Small)
Source: Small - July 2, 2020 Category: Nanotechnology Authors: Xiaodong Li, Ning Wang, Jianjiang He, Ze Yang, Fuhua Zhao, Kun Wang, Changshui Huang Tags: Cover Picture Source Type: research

Masthead: (Small 26/2020)
Small, Volume 16, Issue 26, July 2, 2020. (Source: Small)
Source: Small - July 2, 2020 Category: Nanotechnology Tags: Masthead Source Type: research

Is GSH Chelated Pt Molecule Inactive in Anti ‐Cancer Treatment? A Case Study of Pt6GS4
In this report, endogenous biothiol is utilized to precisely synthesize a GSH chelated Pt molecule (Pt6GS4). This Pt6GS4 molecule can be well taken up by aggressive triple negative breast cancer (TNBC) cells. Subsequently, its metabolites could enter nuclei to interact with DNA, finally the DNA ‐Pt complex triggers TNBC cell apoptosis via the p53 pathway. Impressively, high efficacy for anti‐cancer treatment is achieved by Pt6GS4 both in vitro and in vivo when compared with traditional first ‐line carboplatin in the same dosage. Compared with carboplatin, Pt6GS4 keeps tumor bearing mice alive for a longer time and is...
Source: Small - July 2, 2020 Category: Nanotechnology Authors: Chunyu Zhang, Liang Gao, Qing Yuan, Lina Zhao, Wenchao Niu, Pengju Cai, Jiaojiao Li, Xu Han, Zhesheng He, Fuping Gao, Yaling Wang, Huaidong Jiang, Zhifang Chai, Xueyun Gao Tags: Full Paper Source Type: research

Engineering Supramolecular Polymer Conformation for Efficient Carbon Nanotube Sorting
The addition of chain stoppers significantly improves carbon nanotube (CNT) sorting with an H ‐bonding supramolecular polymer. In‐depth characterization reveals that this supramolecular polymer exhibits ring–chain equilibrium, and that stoppers skew the distribution toward chains, which can wrap CNTs more effectively. Careful selection of the stopper–monomer ratio results in doubling of the sorting yield without compromising the purity or properties of sorted CNTs. AbstractSupramolecular polymer sorting is a promising approach to separating single ‐walled carbon nanotubes (CNTs) by electronic type. Unlike...
Source: Small - July 2, 2020 Category: Nanotechnology Authors: Theodore Z. Gao, Zehao Sun, Xuzhou Yan, Hung ‐Chin Wu, Hongping Yan, Zhenan Bao Tags: Full Paper Source Type: research

Hyperboloid ‐Drum Microdisk Laser Biosensors for Ultrasensitive Detection of Human IgG
The new kind of microdisk lasers in a hyperboloid ‐drum (HD) shape is a combination of a dye‐doped photoresist and a silica microdisk. Such HD microdisk laser biosensors can achieve specific detection of human immunoglobulin G in phosphate‐buffered saline and artificial serum. The results from this study are approximately four orders of magni tude more sensitive than previous reports. AbstractWhispering gallery mode (WGM) microresonators have been used as optical sensors in fundamental research and practical applications. The majority of WGM sensors are passive resonators that require complex systems, thereby limitin...
Source: Small - July 2, 2020 Category: Nanotechnology Authors: Zhihe Guo, Yingchun Qin, Peizong Chen, Jinliang Hu, Yi Zhou, Xuyang Zhao, Zhiran Liu, Yiyan Fei, Xiaoshun Jiang, Xiang Wu Tags: Full Paper Source Type: research

A High ‐Energy and Long‐Life Aqueous Zn/Birnessite Battery via Reversible Water and Zn2+ Coinsertion
A mechanism of aqueous rechargeable zinc ion batteries is demonstrated. Through engineering Zn2+ primary solvation sheath in aqueous electrolyte, highly reversible [Zn(H2O)2]2+ intercalation/extraction into/from birnessite cathode is obtained and cathode –electrolyte interfaces are in‐situ formed suppressing the Mn dissolution. In addition, the Zn metal anode also shows high reversibility without formation of “death‐zinc” and detrimental dendrite. AbstractAqueous rechargeable Zn/birnessite batteries have recently attracted extensive attention for energy storage system because of their low cost and hig...
Source: Small - July 2, 2020 Category: Nanotechnology Authors: Zhiguo Hou, Mengfei Dong, Yali Xiong, Xueqian Zhang, Huaisheng Ao, Mengke Liu, Yongchun Zhu, Yitai Qian Tags: Full Paper Source Type: research

Confinement Growth of Layered WS2 in Hollow Beaded Carbon Nanofibers with Synergistic Anchoring Effect to Reinforce Li+/Na+ Storage Performance
Tungsten disulfide (WS2) nanosheets are anchored on the surface and inside of hollow beaded carbon nanofibers (HB CNFs) via a confined growth strategy to construct hierarchical structure HB WS2@CNFs. The conversion mechanism of Li+/Na+ storage is analyzed by an ex situ method. This special structure can effectively restrain the volume effect and improve the storage performance of lithium ‐ion batteries and sodium‐ion batteries. AbstractNovel nitrogen doped (N ‐doped) hollow beaded structural composite carbon nanofibers are successfully applied for lithium‐ion batteries (LIBs) and sodium‐ion batteries (SIBs). Tung...
Source: Small - July 2, 2020 Category: Nanotechnology Authors: Huayu Wu, Xing Chen, Chen Qian, Hui Yan, Chenyi Yan, Nuo Xu, Yuanzhe Piao, Guowang Diao, Ming Chen Tags: Full Paper Source Type: research

Adsorption ‐Free Growth of Ultra‐Thin Molybdenum Membranes with a Low‐Symmetry Rectangular Lattice Structure
Ultra ‐thin body‐centered‐cubic phase molybdenum membranes with a low‐symmetry rectangular (110) crystal face are synthesized via an adsorption free reaction. This work provides new insight for the preparation of well‐defined two‐dimensional transition metals with (110) faces and also is benef icial for the exploration and development of low‐symmetry rectangular lattice structured materials with unique properties. AbstractAlthough low ‐symmetry lattice structure of 2D transition metals is highly anticipated for both fundamental research and potentially distinctive application, it still has not been experime...
Source: Small - July 2, 2020 Category: Nanotechnology Authors: Jingjing Si, Mengqi Zeng, Huy Q. Ta, Shuting Zheng, Jihai Liao, Xiaobao Yang, Mark H. R ümmeli, Lei Fu Tags: Communication Source Type: research

In Vivo Repeatedly Activated Persistent Luminescence Nanoparticles by Radiopharmaceuticals for Long ‐Lasting Tumor Optical Imaging
Radiopharmaceuticals (18F ‐FDG) with a short decay half‐life are used as the internal light source to in vivo excite Cr3+‐doped zinc gallate (ZGCs) for long‐lasting luminescence for multiple times. This strategy can provide tumor luminescence imaging with high sensitivity, high contrast, and long decay time at desired time, greatly benefiting image‐guided surgery in the future. AbstractPersistent luminescence nanoparticles (PLNPs) with rechargeable near ‐infrared afterglow properties attract much attention for tumor diagnosis in living animals since they can avoid tissue autofluorescence and greatly improve the...
Source: Small - July 2, 2020 Category: Nanotechnology Authors: Nian Liu, Junpeng Shi, Qiang Wang, Jingru Guo, Zhenyu Hou, Xinhui Su, Hongwu Zhang, Xiaolian Sun Tags: Full Paper Source Type: research

Urchin ‐Like Fe3Se4 Hierarchitectures: A Novel Pseudocapacitive Sodium‐Ion Storage Anode with Prominent Rate and Cycling Properties
A Fe3Se4 anode featuring urchin ‐like hierarchitectures presents ultrahigh rate capability and outstanding cyclic stability in sodium‐ion batteries. As revealed by electrochemical analyses and in situ XRD, the phase transformation from monoclinic to amorphous structure accompanied by the pseudocapacitive Na+ storage behavior accounts for the superior electrochemical performance. AbstractTransition metal chalcogenides have received great attention as promising anode candidates for sodium ‐ion batteries (SIBs). However, the undesirable cyclic life and inferior rate capability still restrict their practical applications...
Source: Small - July 2, 2020 Category: Nanotechnology Authors: Jian Zhang, Yongchang Liu, Hui Liu, Yuzhu Song, Shengdong Sun, Qiang Li, Xianran Xing, Jun Chen Tags: Full Paper Source Type: research

Bath Electrospinning of Continuous and Scalable Multifunctional MXene ‐Infiltrated Nanoyarns
Continuous and electroactive MXene ‐based nanofiber yarns (nanoyarns) are fabricated using a bath electrospinning method, which captures MXene flakes throughout the entire cross‐section of a nanoyarn, maximizing interactions between nanofibers and flakes. The high stretchability of polymeric nanofibers and the electrical and elec trochemical properties of MXene offer a platform for storing energy and sensing body movements in wearable textiles. AbstractElectroactive yarns that are stretchable are desired for many electronic textile applications, including energy storage, soft robotics, and sensing. However, using curre...
Source: Small - July 2, 2020 Category: Nanotechnology Authors: Ariana Levitt, Shayan Seyedin, Jizhen Zhang, Xuehang Wang, Joselito M. Razal, Genevieve Dion, Yury Gogotsi Tags: Full Paper Source Type: research

Ultrathin 2D Mesoporous TiO2/rGO Heterostructure for High ‐Performance Lithium Storage
2D ultrathin mesoporous TiO2/rGO heterostructure is fabricated after heat treatment of the coprecipitated single ‐layered Ti3O72 −/GO nanosheet. Owing to the ultrathin mesoporous characteristics and the enhanced ionic and electron conductivity, the resulting 2D ultrathin mesoporous heterostructures can deliver an extremely high lithium storage capacity and excellent cycling stability at high current density. AbstractLithium ‐ion batteries (LIBs) have been widely applied and studied as an effective energy supplement for a variety of electronic devices. Titanium dioxide (TiO2), with a high theoretical capacity (335...
Source: Small - July 2, 2020 Category: Nanotechnology Authors: Yaru Liang, Xiang Xiong, Zhuijun Xu, Qingbing Xia, Liyang Wan, Rutie Liu, Guoxin Chen, Shu ‐Lei Chou Tags: Full Paper Source Type: research

Enhanced Photocatalytic H2 ‐Production Activity of CdS Quantum Dots Using Sn2+ as Cocatalyst under Visible Light Irradiation
Sn2+ greatly enhances the H2‐production activity of water‐soluble CdS quantum dots (QDs). Sn2+ ions are reduced to Sn atoms by the electrons generated from the conduction band of CdS quantum dots under visible light irradiation. Sn atoms not only serve as photocatalytic cocatalyst for hydrogen generation, but also participate in forming CdS/Sn Schottky heterojunction. AbstractHerein, oil ‐soluble CdS quantum dots (QDs) are first prepared through a solvent‐thermal process. Then, oil‐soluble CdS QDs are changed into water‐soluble QDs via ligand exchange using mercaptopropionic acid as capping agent at pH 13. The ...
Source: Small - July 2, 2020 Category: Nanotechnology Authors: Xianglin Xiang, Bicheng Zhu, Bei Cheng, Jiaguo Yu, Hongjin Lv Tags: Full Paper Source Type: research

X ‐Ray‐Induced Growth Dynamics of Luminescent Silver Clusters in Zeolites
Luminescent silver clusters can be formed in zeolite frameworks by X ‐ray irradiation, but they have a broader size distribution. Cluster growth dynamics is framework‐dependent and is also dependent on degree of silver loading in the framework. Growth from cations to luminescent clusters then non‐luminescent metallic nanoparticles is observed. AbstractHerein, AlKα X ‐rays are used to drive the growth of luminescent silver clusters in zeolites. The growth of the silver species is tracked using Auger spectroscopy and fluorescence microscopy, by monitoring the evolution from their ions to luminescent clusters an...
Source: Small - July 2, 2020 Category: Nanotechnology Authors: Oliver Fenwick, Eduardo Couti ño‐Gonzalez, Fanny Richard, Sara Bonacchi, Wouter Baekelant, Dirk Vos, Maarten B. J. Roeffaers, Johan Hofkens, Paolo Samorì Tags: Full Paper Source Type: research

SnO2 Quantum Dots: Rational Design to Achieve Highly Reversible Conversion Reaction and Stable Capacities for Lithium and Sodium Storage
SnO2 quantum dots ( ≈5 nm) embedded in porous N‐doped carbon matrix (SnO2/NC) are developed via a hydrothermal step combined with a self ‐polymerization process at room temperature. The ultrasmall size in quantum dots greatly shortens the ion diffusion distance and lowers the internal strain, significantly improving the conversion reaction efficiency and initial coulombic efficiency in lithium and sodium storage. AbstractSnO2 has been considered as a promising anode material for lithium ‐ion batteries (LIBs) and sodium ion batteries (SIBs), but challenging as well for the low‐reversible conversion reaction an...
Source: Small - July 2, 2020 Category: Nanotechnology Authors: Yong Cheng, Shaohua Wang, Lin Zhou, Limin Chang, Wanqiang Liu, Dongming Yin, Zheng Yi, Limin Wang Tags: Full Paper Source Type: research

Graphitic Carbon Nitride Stabilizers Meet Microfluidics: From Stable Emulsions to Photoinduced Synthesis of Hollow Polymer Spheres
In this study, a special surface‐modified g‐CN is used to form stable Pickering emulsions. Using a PDMS‐based microfluidic device designed for stable production of both single and double emulsions, it is shown that surface‐modified g‐CNs allow the manufacture of unconventionally stable and precise Pickering emulsions. Shell thickness of the double emulsions is varied to emphasize the robustness of the device and also to demonstrate the extraordinary stabilization brought by the surface‐modified carbon nitride used in this study. Due to the electrostatic stabilization also in the oil phase, double emulsions are ...
Source: Small - July 2, 2020 Category: Nanotechnology Authors: Naresh Yandrapalli, Tom Robinson, Markus Antonietti, Baris Kumru Tags: Communication Source Type: research

Hierarchically Well ‐Developed Porous Graphene Nanofibers Comprising N‐Doped Graphitic C‐Coated Cobalt Oxide Hollow Nanospheres As Anodes for High‐Rate Li‐Ion Batteries
Hierarchically well ‐developed porous graphene nanofibers comprising N‐doped graphitic C‐coated cobalt oxide hollow nanospheres are introduced as anodes for high‐rate Li‐ion batteries. In view of the highly efficient Li+ ion/electron diffusion and high structural stability, the unique nanostructuring strategy has a huge potential in opening new frontiers for high ‐rate and long‐lived stable energy storage systems. AbstractHierarchically well ‐developed porous graphene nanofibers comprising N‐doped graphitic C (NGC)‐coated cobalt oxide hollow nanospheres are introduced as anodes for high‐rate Li‐ion ...
Source: Small - July 2, 2020 Category: Nanotechnology Authors: Jae Seob Lee, Min Su Jo, Rakesh Saroha, Dae Soo Jung, Young Hoe Seon, Jun Su Lee, Yun Chan Kang, Dong ‐Won Kang, Jung Sang Cho Tags: Full Paper Source Type: research

Phosphorus ‐Doped Iron Nitride Nanoparticles Encapsulated by Nitrogen‐Doped Carbon Nanosheets on Iron Foam In Situ Derived from Saccharomycetes Cerevisiae for Electrocatalytic Overall Water Splitting
Saccharomycetes cerevisiae is used as a nitrogen source to safely produce metal nitride instead of the high ‐cost and hazardous NH3. Elemental diffusion pattern and contact form forS. cerevisiae affect the composition and phase of products. The obtained P ‐Fe3N@NC NSs/IF with Fe sites as the active center and P ‐doping regulating H‐binding strength exhibits excellent electrocatalytic performance for overall water splitting. AbstractIt is vitally essential to propose a novel, economical, and safe preparation method to design highly efficient electrocatalysts. Herein, phosphorus ‐doped iron nitride nanoparticles en...
Source: Small - July 2, 2020 Category: Nanotechnology Authors: Guixiang Li, Jiayuan Yu, Wanqiang Yu, Linjing Yang, Xiaoli Zhang, Xiaoyan Liu, Hong Liu, Weijia Zhou Tags: Full Paper Source Type: research

Temperature ‐Dependent Tip‐Induced Motion of Ga Adatom on GaAs (110) Surface
Temperature dependent adsorption sites and tip ‐induced motions of Ga adatoms on a semiconductor GaAs (110) surface are explored in a real space image using scanning tunneling microscopy (STM). The surface adsorption potential profile of the Ga adatom on the GaAs (110) obtained by first‐principles calculations successfully demonstrates oberv ed temperature depending phenomena. AbstractThe temperature ‐dependent tip‐induced‐motion of a Ga adatom on a GaAs (110) surface is experimentally demonstrated using scanning tunneling microscopy (STM). The surface adsorption energy profile obtained by first‐principle elect...
Source: Small - July 2, 2020 Category: Nanotechnology Authors: Shigeru Kaku, Junji Yoshino Tags: Full Paper Source Type: research

Respiration Monitoring: From Molecular Reconstruction of Mesoscopic Functional Conductive Silk Fibrous Materials to Remote Respiration Monitoring (Small 26/2020)
In article numberhttps://doi.org/10.1002/smll.2020002032000203, Xiang Yang Liu and co ‐workers meso‐reconstruct silkworm silk fibrous materials based on carbon nanotubes which give rise to conductive silk fibers, for the fabrication of silk flexible electronics. They have humidity dependent conductivity and can be developed into biocompatible electronic humidity sensors. The comb ination with cloud computation and big data leads to remote monitoring and diagnosis of respiration and other physiological conditions. (Source: Small)
Source: Small - July 2, 2020 Category: Nanotechnology Authors: Liyun Ma, Qiang Liu, Ronghui Wu, Zhaohui Meng, Aniruddha Patil, Rui Yu, Yun Yang, Shuihong Zhu, Xuwei Fan, Chen Hou, Yanran Li, Wu Qiu, Lianfen Huang, Jun Wang, Naibo Lin, Yizao Wan, Jian Hu, Xiang Yang Liu Tags: Back Cover Source Type: research

Perovskite Photodetectors: Sensitive and Stable Tin –Lead Hybrid Perovskite Photodetectors Enabled by Double‐Sided Surface Passivation for Infrared Upconversion Detection (Small 26/2020)
In article numberhttps://doi.org/10.1002/smll.2020015342001534, Liang Shen and co ‐workers demonstrate a sensitive and stable Sn‐Pb perovskite photodetector, employing phenethylammonium iodide to complete defects passivation aiming the top and bottom of films. The double‐sided surface passivation engineering can promote the grain growth, reduce the density of trap states an d improve surface hydrophobicity. Finally, it realizes infrared up‐conversion application for visualization. (Source: Small)
Source: Small - July 2, 2020 Category: Nanotechnology Authors: Yan Zhao, Chenglong Li, Jizhong Jiang, Boming Wang, Liang Shen Tags: Inside Back Cover Source Type: research

Masthead: (Small 26/2020)
Small, Volume 16, Issue 26, July 2, 2020. (Source: Small)
Source: Small - July 2, 2020 Category: Nanotechnology Tags: Masthead Source Type: research

Enzyme Sampling: Temporal Sampling of Enzymes from Live Cells by Localized Electroporation and Quantification of Activity by SAMDI Mass Spectrometry (Small 26/2020)
In article numberhttps://doi.org/10.1002/smll.2020005842000584, Milan Mrksich, Horacio D. Espinosa, and co ‐workers report on a method for non‐destructively sampling enzymes multiple times from small populations of cells, using localized electroporation in microfluidic live cell analysis devices. The enzymes are captured in extraction chambers, where they modify immobilized substrates on a self‐ass embled monolayer, and their activity is quantified using self‐assembled monolayers for matrix‐assisted laser desorption/ionization (SAMDI) mass spectrometry. (Source: Small)
Source: Small - July 2, 2020 Category: Nanotechnology Authors: Prithvijit Mukherjee, Eric J. Berns, Cesar A. Patino, Elamar Hakim Moully, Lingqian Chang, S. Shiva P. Nathamgari, John A. Kessler, Milan Mrksich, Horacio D. Espinosa Tags: Inside Front Cover Source Type: research

Carbon Nanothorn Arrays: One ‐Step Preparation of Highly Durable Superhydrophobic Carbon Nanothorn Arrays (Small 26/2020)
In article numberhttps://doi.org/10.1002/smll.2019070131907013, Changshui Huang and co ‐workers directly prepare the methyl substituted graphdiyne nanothorn arrays (MGDY NTAs) on a variety of substrates by a one‐step method, which shows superhydrophobic properties, and high durability. The MGDY NTAs can be applied in the fields of metal corrosion protection and oil–water separat ion. (Source: Small)
Source: Small - July 2, 2020 Category: Nanotechnology Authors: Xiaodong Li, Ning Wang, Jianjiang He, Ze Yang, Fuhua Zhao, Kun Wang, Changshui Huang Tags: Cover Picture Source Type: research

Graphitic Carbon Nitride Stabilizers Meet Microfluidics: From Stable Emulsions to Photoinduced Synthesis of Hollow Polymer Spheres
In this study, a special surface‐modified g‐CN is used to form stable Pickering emulsions. Using a PDMS‐based microfluidic device designed for stable production of both single and double emulsions, it is shown that surface‐modified g‐CNs allow the manufacture of unconventionally stable and precise Pickering emulsions. Shell thickness of the double emulsions is varied to emphasize the robustness of the device and also to demonstrate the extraordinary stabilization brought by the surface‐modified carbon nitride used in this study. Due to the electrostatic stabilization also in the oil phase, double emulsions are ...
Source: Small - July 2, 2020 Category: Nanotechnology Authors: Naresh Yandrapalli, Tom Robinson, Markus Antonietti, Baris Kumru Tags: Communication Source Type: research

Hierarchically Well ‐Developed Porous Graphene Nanofibers Comprising N‐Doped Graphitic C‐Coated Cobalt Oxide Hollow Nanospheres As Anodes for High‐Rate Li‐Ion Batteries
Hierarchically well ‐developed porous graphene nanofibers comprising N‐doped graphitic C‐coated cobalt oxide hollow nanospheres are introduced as anodes for high‐rate Li‐ion batteries. In view of the highly efficient Li+ ion/electron diffusion and high structural stability, the unique nanostructuring strategy has a huge potential in opening new frontiers for high ‐rate and long‐lived stable energy storage systems. AbstractHierarchically well ‐developed porous graphene nanofibers comprising N‐doped graphitic C (NGC)‐coated cobalt oxide hollow nanospheres are introduced as anodes for high‐rate Li‐ion ...
Source: Small - July 2, 2020 Category: Nanotechnology Authors: Jae Seob Lee, Min Su Jo, Rakesh Saroha, Dae Soo Jung, Young Hoe Seon, Jun Su Lee, Yun Chan Kang, Dong ‐Won Kang, Jung Sang Cho Tags: Full Paper Source Type: research

Phosphorus ‐Doped Iron Nitride Nanoparticles Encapsulated by Nitrogen‐Doped Carbon Nanosheets on Iron Foam In Situ Derived from Saccharomycetes Cerevisiae for Electrocatalytic Overall Water Splitting
Saccharomycetes cerevisiae is used as a nitrogen source to safely produce metal nitride instead of the high ‐cost and hazardous NH3. Elemental diffusion pattern and contact form forS. cerevisiae affect the composition and phase of products. The obtained P ‐Fe3N@NC NSs/IF with Fe sites as the active center and P ‐doping regulating H‐binding strength exhibits excellent electrocatalytic performance for overall water splitting. AbstractIt is vitally essential to propose a novel, economical, and safe preparation method to design highly efficient electrocatalysts. Herein, phosphorus ‐doped iron nitride nanoparticles en...
Source: Small - July 2, 2020 Category: Nanotechnology Authors: Guixiang Li, Jiayuan Yu, Wanqiang Yu, Linjing Yang, Xiaoli Zhang, Xiaoyan Liu, Hong Liu, Weijia Zhou Tags: Full Paper Source Type: research

Efficient Bifunctional Catalytic Electrodes with Uniformly Distributed NiN2 Active Sites and Channels for Long ‐Lasting Rechargeable Zinc–Air Batteries
A 3D hierarchical self ‐supported air electrode composed of NiN2 active sites and Ni nanoparticles encapsulated in carbon nanotubes exhibits superior oxygen reduction and oxygen evolution catalytic activities. The rechargeable zinc –air batteries based on the as‐prepared air electrode show outstanding long term stability, high power density, and specific capacity. AbstractFreestanding bifunctional electrodes with outstanding oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) properties are of great significance for zinc –air batteries, attributed to the avoided use of organic binder and str...
Source: Small - July 1, 2020 Category: Nanotechnology Authors: Zihe Cai, Shengxuan Lin, Jiajia Xiao, Tahir Muhmood, Yuhang Chen, Yifan Wang, Xiaobin Hu, Lirong Zheng Tags: Full Paper Source Type: research

A Unique Double ‐Layered Carbon Nanobowl‐Confined Lithium Borohydride for Highly Reversible Hydrogen Storage
A double ‐layered carbon nanobowl‐confined LiBH4 composite is prepared by a facile melt infiltration process. The composite readily desorbs and absorbs ≈8.5 wt% of H2 at 300 °C and 100 bar of hydrogen pressure. The practical volumetric energy density reaches as high as 82.4 g L−1 with considerable dehydriding kinetics after cold pressing to form a pellet. AbstractPoor reversibility and high desorption temperature restricts the practical use of lithium borohydride (LiBH4) as an advanced hydrogen store. Herein, a LiBH4 composite confined in unique double ‐layered carbon nanobowls prepared by a facile me...
Source: Small - July 1, 2020 Category: Nanotechnology Authors: Ruyan Wu, Xin Zhang, Yongfeng Liu, Lingchao Zhang, Jianjiang Hu, Mingxia Gao, Hongge Pan Tags: Full Paper Source Type: research