Confining ZnS/SnS2 Ultrathin Heterostructured Nanosheets in Hollow N ‐Doped Carbon Nanocubes as Novel Sulfur Host for Advanced Li‐S Batteries
Ultrathin petal-like heterostructured ZnS/SnS2 nanosheets confined in hollow N-doped carbon nanocubes as a conceptually novel sulfur host are developed. Benefiting from the unique structure and sophisticated composition, a high-capacity and long-life Li-S battery can be realized. AbstractHollow nanostructured hosts are important scaffolds to achieve high sulfur loading, fast charge transfer, and conspicuous restraint of lithium polysulfides (LiPSs) shuttling in lithium-sulfur (Li-S) batteries. However, developing high-efficiency hollow hosts for improving utilization and conversion of aggregated sulfur in the hollow chambe...
Source: Small - May 18, 2022 Category: Nanotechnology Authors: Bo Yan, Yan Li, Lin Gao, Huachao Tao, Lulu Zhang, Shengkui Zhong, Xifei Li, Xuelin Yang Tags: Research Article Source Type: research

Bridging the Interfacial Contact for Improved Stability and Efficiency of Inverted Perovskite Solar Cells
[2-(9H-carbazol-9-yl) ethyl] phosphonic acid (2P) is introduced to modify the surface of the hole-transport layer (HTL). 2P benefits the perovskite growth and interfacial contact. Moreover, 2P-modified HTL shows better energy-level alignment with perovskite. The 2P-incorporated inverted perovskite solar cell delivers a high efficiency of 22.17% and keeps stable under ambient atmosphere (RH: ≈30–40%) without encapsulation for 7200 h. AbstractInverted perovskite solar cells (PSCs) have received widespread attention due to their facile fabrication and wide applications. However, their power conversion efficiency (PCE) is ...
Source: Small - May 17, 2022 Category: Nanotechnology Authors: Yulan Huang, Tanghao Liu, Dongyang Li, Qing Lian, Yun Wang, Guoliang Wang, Guojun Mi, Yuanyuan Zhou, Abbas Amini, Baomin Xu, Zikang Tang, Chun Cheng, Guichuan Xing Tags: Research Article Source Type: research

Colloidal Multiscale Assembly via Photothermally Driven Convective Flow for Sensitive In ‐Solution Plasmonic Detections
A light-induced, linker-free and on-spot 3D multiscale coassembly of plasmonic nanoparticles is developed to detect enhanced Raman signals of liquid samples including multiscale analytes from nano to micron. Using the photothermally driven 3D coassembly, a dramatic Raman enhancement of molecules, microplastics, and microbe is achieved by up to fivefold magnitude compared to the previous colloidal assembly methods. AbstractThe assembly of metal nanoparticles and targets to be detected in a small light probe volume is essential for achieving sensitive in-solution surface-enhanced Raman spectroscopy (SERS). Such assemblies ge...
Source: Small - May 17, 2022 Category: Nanotechnology Authors: Junhee Park, Seungki Lee, Hyunjoo Lee, Seungyeon Han, Tae Ho Kang, Dongchoul Kim, Taewook Kang, Inhee Choi Tags: Research Article Source Type: research

Thermochromic Cs2AgBiBr6 Single Crystal with Decreased Band Gap through Order ‐Disorder Transition
This work shows a thermochromic strategy to decrease the band gap of Cs2AgBiBr6 by approximately 0.36  eV, obtaining the smallest reported band gap of 1.69 eV under ambient conditions. The high annealing temperature leads to an order to partially disorder the transition of Ag and Bi atoms at the B-site, which broadens the band edge and decreases the band gap. AbstractLead-free Cs2AgBiBr6 double perovskite is considered to be a promising alternative to the traditional lead-based analogues due to its long carrier lifetime, high structural stability, and non-toxicity. However, the large band gap limits its absorption of vis...
Source: Small - May 16, 2022 Category: Nanotechnology Authors: Yaru Zhang, Yilong Song, Yuan Lu, Zhuang Zhang, Yang Wang, Yang Yang, Qingfeng Dong, Yi Yu, Peng Qin, Fuqiang Huang Tags: Research Article Source Type: research

pH Stimuli ‐Responsive, Rapidly Self‐healable Coatings Enhanced the Corrosion Resistance and Osteogenic Differentiation of Mg‐1Ca Osteoimplant
A pH stimuli-responsive silk-halloysite (HNT)/phytic acid (PA) self-healing coating (Silk-HNT/PA) is fabricated on Mg-1Ca alloy. Halloysite (HNT) significantly improves the loading efficiency and shortens the self-healing time of Silk-PA coating. The Silk-HNT/PA coating improves the corrosion resistance and osteogenic differentiation of Mg-1Ca alloy. AbstractMg-Ca alloys have emerged as a promising research direction for biomedical implants in the orthopedic field. However, their clinical use is deterred by their fast corrosion rate. In this work, a pH stimuli-responsive silk-halloysite (HNT)/phytic acid (PA) self-healing ...
Source: Small - May 16, 2022 Category: Nanotechnology Authors: Dandan Xia, Zhaojun Jia, Yunong Shen, Yufeng Zheng, Yan Cheng, Pan Xiong, Shaokang Guan, Yuqian Xu, Fan Yang, Yunsong Liu, Yongsheng Zhou Tags: Research Article Source Type: research

Construction of Synergistic Ni3S2 ‐MoS2 Nanoheterojunctions on Ni Foam as Bifunctional Electrocatalyst for Hydrogen Evolution Integrated with Biomass Valorization
In this study, a Ni3S2-MoS2 nanoheterojunction catalyst with strong electronic interactions is prepared. It exhibits high efficiency for both the HER and the electrooxidation of 5-hydroxymethylfurfural (HMF). In a two-electrode cell with Ni3S2-MoS2 serving as both the anode and cathode, the potential is only 1.44  V at a current density of 10 mA cm−2, which is much lower than that of pure water splitting. Density functional theory calculations confirm that the strong chemisorption of H and HMF at the interface leads to outstanding electrocatalytic activity. The findings not only provide a strategy for developing effici...
Source: Small - May 16, 2022 Category: Nanotechnology Authors: Shaowei Yang, Ying Guo, Yike Zhao, Ling Zhang, Haidong Shen, Jinhui Wang, Jinjin Li, Chen Wu, Wenbin Wang, Yueling Cao, Sifei Zhuo, Qiuyu Zhang, Hepeng Zhang Tags: Research Article Source Type: research

Sustainable ‐Macromolecule‐Assisted Preparation of Cross‐linked, Ultralight, Flexible Graphene Aerogel Sensors toward Low‐Frequency Strain/Pressure to High‐Frequency Vibration Sensing
Sustainable-macromolecule-derived carbons are efficiently employed to cross-link the graphene nanosheets for constructing ultralight, highly flexible, and biomimetic porous graphene aerogel sensors, which show superior compressibility and resilience, good mechanical strength and durability, and satisfactory fire-resistance, as well as the outstanding low-frequency strain/pressure to high-frequency vibration electromechanical sensing performance. AbstractUltralight and highly flexible aerogel sensors, composed of reduced graphene oxide cross-linked by sustainable-macromolecule-derived carbon, are prepared via facile freeze-...
Source: Small - May 16, 2022 Category: Nanotechnology Authors: Zhihui Zeng, Na Wu, Weidong Yang, Hao Xu, Yaozhong Liao, Chenwei Li, Mirko Lukovi ć, Yunfei Yang, Shanyu Zhao, Zhongqing Su, Xuehong Lu Tags: Research Article Source Type: research

Combination of Metal ‐Phenolic Network‐Based Immunoactive Nanoparticles and Bipolar Irreversible Electroporation for Effective Cancer Immunotherapy
For successful cancer immunotherapy, the authors present a combination therapy of metal-phenolic network-based nanoparticles and bipolar irreversible electroporation (IRE). Antigen-presenting cells are primed by a CpG-ODN-coated Mn-phenolic network (CMP) that elicits M1 polarization and proinflammatory cytokine release. Immunogenic cell death is induced by the bipolar IRE. Finally, the combination of CMP nanoparticles with bipolar IRE demonstrates superior anti-tumor activity. AbstractTo circumvent the limitations of conventional cancer immunotherapy, it is critical to prime antigen-presenting cells (APCs) to initiate the ...
Source: Small - May 16, 2022 Category: Nanotechnology Authors: Jun ‐Hyeok Han, Ha Eun Shin, Jiyoung Lee, Jeon Min Kang, Jung‐Hoon Park, Chun Gwon Park, Dong Keun Han, Ik‐Hwan Kim, Wooram Park Tags: Research Article Source Type: research

A Synthetic Protocell ‐Based Heparin Scavenger
Semipermeable proteinosomes are developed to scavenge heparin, and a comparable performance to the commercial antidote, protamine sulfate, is demonstrated. The toxic effect of the cationic binder and the polyelectrolyte complexes are shielded by the biocompatible compartment. Moreover, selective heparin-scavenging performance is achieved through adjusting local scavenger or surrounding salt concentrations, making such a platform promising in scavenging polyelectrolytes in general. AbstractHeparin is a commonly applied blood anticoagulant agent in clinical use. After treatment, excess heparin needs to be removed to circumve...
Source: Small - May 16, 2022 Category: Nanotechnology Authors: Qing Liu, Shuo Yang, Iris Seitz, Anna ‐Maria Makri Pistikou, Tom F. A. Greef, Mauri A. Kostiainen Tags: Research Article Source Type: research

New Trends in Nanoarchitectured SERS Substrates: Nanospaces, 2D Materials, and Organic Heterostructures
This article reviews recent fabrication methods for surface-enhanced Raman spectroscopy (SERS) substrates with a focus on advanced nanoarchitecture based on noble metals with special nanospaces (round tips, gaps, and porous spaces), nanolayered 2D materials, including hybridization with metallic nanostructures (NSs), and the contemporary repertoire of nanoarchitecturing with organic molecules. The use of SERS for multidisciplinary applications has been extensively investigated because the considerably enhanced signal intensity enables the detection of a very small number of molecules with molecular fingerprints. Nanoarchit...
Source: Small - May 16, 2022 Category: Nanotechnology Authors: Olga Guselnikova, Hyunsoo Lim, Hyun ‐Jong Kim, Sung Hyun Kim, Alina Gorbunova, Miharu Eguchi, Pavel Postnikov, Takuya Nakanishi, Toru Asahi, Jongbeom Na, Yusuke Yamauchi Tags: Review Source Type: research

Plasmonic Hydrogen Sensors
Hydrogen sensors based on plasmonic nanostructures with their plasmonic effect, metal-hydrogen interaction, working principle, and sensing properties are introduced in this review. The merit and demerit of different types of plasmonic nanostructures are summarized and potential development directions are proposed, aiming to inspire more ingenious designs and execution of plasmonics for advanced hydrogen sensors. AbstractHydrogen is regarded as the ultimate fuel and energy carrier with a high theoretical energy density and universality of sourcing. However, hydrogen is easy to leak and has a wide flammability range in air. ...
Source: Small - May 14, 2022 Category: Nanotechnology Authors: Bin Ai, Yujing Sun, Yiping Zhao Tags: Review Source Type: research

Free ‐Standing Nanoarrays with Energetic Electrons and Active Sites for Efficient Plasmon‐Driven Ammonia Synthesis
Free-standing plasmonic nanoarrays are designed for efficient and monolithic photoelectrochemical (PEC) nitrogen reduction toward ammonia (NH3) synthesis, especially under visible light irradiation. Intriguingly, the integration of both energetic hot electrons from plasmonic KxMoO3 nanoarrays and catalytically active sites of Au nanoparticles enables the Au/KxMoO3/Mo/KxMoO3/Au nanoarrays to exhibit a high-performance plasmon-driven PEC NH3 synthesis activity. AbstractDirect ammonia (NH3) synthesis from water and atmospheric nitrogen using sunlight provides an energy-sustainable and carbon-neutral alternative to the Haber ...
Source: Small - May 14, 2022 Category: Nanotechnology Authors: Weiyi Jiang, Haona Zhang, Yang An, Yuyin Mao, Zeyan Wang, Yuanyuan Liu, Peng Wang, Zhaoke Zheng, Wei Wei, Ying Dai, Hefeng Cheng, Baibiao Huang Tags: Research Article Source Type: research

Engineered Bacteria with Genetic Circuits Accumulating Nanomagnets as MRI Contrast Agents
By employing synthetic biology,Escherichia coli is engineered to harbor genetic circuitries for the purpose of accumulating magnetite crystals inside/on the cell surface as a potentially alternative way with minimal side effects to healthy cells to enhance in vivo cancer targeting for MRI imaging, hyperthermia, or drug delivery. AbstractThe demand for highly efficient cancer diagnostic tools increases alongside the high cancer incidence nowadays. Moreover, there is an imperative need for novel cancer treatment therapies that lack the side effects of conventional treatment options. Developments in this aspect employ magneti...
Source: Small - May 14, 2022 Category: Nanotechnology Authors: Merve Yavuz, Mustafa Ütkür, Ebru Şahin Kehribar, Ecrin Yağız, Emine Ülkü Sarıtaş, Urartu Özgür Şafak Şeker Tags: Research Article Source Type: research

Electrically Accelerated Self ‐Healable Polyionic Liquid Copolymers
Electrically accelerated self-healable poly(ionic liquids) copolymers with frequency-dependent parallel resistor-capacitor circuit properties developed in these studies are capable of multiple damage-repair cycles. Self-healing is accelerated by the application of alternating electric fields which induce movement of charges giving rise to interchain physical crosslinks that accelerate the recovery of van der Waals forces facilitating self-healing. AbstractElectrically accelerated self-healable poly(ionic liquids) copolymers that exhibit resistor-capacitor (RC) circuit properties are developed. At low alternating current (A...
Source: Small - May 14, 2022 Category: Nanotechnology Authors: Qianhui Liu, Siyang Wang, Zeyu Zhao, Jianhua Tong, Marek W. Urban Tags: Research Article Source Type: research

Ru/Rh Cation Doping and Oxygen ‐Vacancy Engineering of FeOOH Nanoarrays@Ti3C2Tx MXene Heterojunction for Highly Efficient and Stable Electrocatalytic Oxygen Evolution
A cation-doping and oxygen-vacancy engineering is developed to fabricate Ru/Rh-doped FeOOH nanoarrays with abundant oxygen-vacancies in situ grown on Ti3C2Tx MXene (Ru/Rh-FeOOH@Ti3C2Tx), which presents superior OER activity and stability in alkaline media. Experimental and theoretical results verify Ru/Rh-cation doping and oxygen vacancy can decrease adsorption/desorption energy barrier and activation energy, optimizing intrinsic OER activity of Ru/Rh-FeOOH@Ti3C2Tx. AbstractOxyhydroxides hold promise as highly-efficient non-noble electrocatalysts for the oxygen evolution reaction (OER), but their poor conductivity and stru...
Source: Small - May 14, 2022 Category: Nanotechnology Authors: Bing Zhang, Jiongwei Shan, Xinying Wang, Yanjie Hu, Yunyong Li Tags: Research Article Source Type: research