Silicon Radical ‐Induced CH4 Dissociation for Uniform Graphene Coating on Silica Surface (Small 16/2024)
Graphene FrameworksIn article number2306325, Zheng-Ze Pan, Devis Di Tommaso, Hirotomo Nishihara, and co-workers tackle the surface inertness of SiO2 on graphene coating over chemical vapor deposition via the pre-grafting of trimethyl silane (TMS) groups on the pristine SiO2 surface. TMS-grafted SiO2 facilitates the graphene growth via the in-situ formed Si radicals that catalyze CH4 dissociation. This provides insights on the graphene growth chemistries, promoting the synthesis of tailored graphene-based materials. (Source: Small)
Source: Small - April 18, 2024 Category: Nanotechnology Authors: Kritin Pirabul,
Qi Zhao,
Zheng ‐Ze Pan,
Hongyu Liu,
Mutsuhiro Itoh,
Kenichi Izawa,
Makoto Kawai,
Rachel Crespo‐Otero,
Devis Di Tommaso,
Hirotomo Nishihara Tags: Frontispiece Source Type: research
Cs ‐treatments in Kesterite Thin‐Film Solar Cells for Efficient Perovskite Tandems (Small 16/2024)
Thin-Film Solar CellsA facile CsF treatment enhances CZTSSe grain growth and phase homogeneity, resulting in effective charge transport and a favorable P-N junction. This leads to a significant performance enhancement in CZTSSe thin-film solar cells, increasing efficiency from 8.38% to 10.20%. The CsF-treated CZTSSe bottom cell is integrated into a mechanically-stacked perovskite/CZTSSe 4T tandem solar cell, achieving the highest reported tandem efficiency of 23.01%. More in article number2307175, Jaeyeong Heo, Gee Yeong Kim, Jin Young Kim, and co-workers. (Source: Small)
Source: Small - April 18, 2024 Category: Nanotechnology Authors: Sun Kyung Hwang,
So Jeong Park,
Jae Hyun Park,
Joo Ho Yoon,
Jae Yu Cho,
Deok Ki Cho,
Jaeyeong Heo,
Gee Yeong Kim,
Jin Young Kim Tags: Inside Front Cover Source Type: research
Charge Carriers Localization Effect Revealed through Terahertz Spectroscopy of MXene: Ti3C2Tx (Small 16/2024)
Terahertz SpectroscopyIn article number2306200, Tao Zhao, Tianwu Wang, Guangyou Fang, and co-workers generated broadband terahertz pulses by dual-color laser-induced air plasma. Subsequently, the interaction between terahertz waves and MXene reveals the localized charge carrier effects caused by electron-phonon scattering. In the image, ‘e’ and ‘p’ represent electrons and phonons, respectively, while the dial indicates electrons (charge carriers) localized due to electron-phonon scattering. (Source: Small)
Source: Small - April 18, 2024 Category: Nanotechnology Authors: Enen Li,
Jincheng Wei,
Tianyu Zhang,
Hujie Wan,
Yuguang Cheng,
Jiafeng Xie,
Hong Li,
Kai Zhang,
Jingyin Xu,
Jinkang Hu,
Qiye Wen,
Xu Xiao,
Tao Zhao,
Min Hu,
Fuhai Su,
Tianwu Wang,
Guangyou Fang Tags: Cover Picture Source Type: research
Masthead: (Small 16/2024)
(Source: Small)
Source: Small - April 18, 2024 Category: Nanotechnology Tags: Masthead Source Type: research
AIB3IIC2IIIQ6VIXVII: A Thioborate Halide Family for Developing Wide Bandgap Infrared Nonlinear Materials by Coupling Planar [BS3] and Polycations
Six new metal thioborates ABa3B2S6X (A = Rb, Cs; X = Cl, Br, I), belonging to a new AIB3IIC2IIIQ6VIXVIII${{\mathrm{A}}}^{\mathrm{I}}{\mathrm{B}}_3^{{\mathrm{II}}}{\mathrm{C}}_2^{{\mathrm{III}}}{\mathrm{Q}}_6^{{\mathrm{VI}}}{{\mathrm{X}}}^{{\mathrm{VIII}}}$ family, are designed by coupling NLO-active [BS3] planar units and halide-centered polycations, and synthesized by the flux method at a relatively low temperature of 650 °C. ABa3B2S6X (A = Rb, Cs; X = Br, I) show wide bandgaps ( ≈ 3.5 eV), high LIDT (≈ 6 × AGS), large NLO response (≈ 0.6 × AGS), demonstrating that planar [BS3] is a good NLO-active unit and th...
Source: Small - April 18, 2024 Category: Nanotechnology Authors: Jiazheng Zhou,
Ketian Hou,
Yu Chu,
Zhihua Yang,
Junjie Li,
Shilie Pan Tags: Research Article Source Type: research
Gas Release as an Efficient Strategy to Tune Mechanical Properties and Thermoresponsiveness of Dynamic Molecular Crystals
Stimuli-responsive crystals of piperazinium trifluoroacetate exhibit (1) plastic deformation readily upon stressing and (2) jumping upon heating. Moreover, the controlled release of volatile coformer (trifluoroacetic acid, jumping-mate) from the lattice helps to tune both functionalities [1 and 2] efficiently by partially preserving the system's integrity. A new crystal engineering strategy to gain further control over multi-stimuli-responsive crystals to build next-generation smart and adaptive materials is established. AbstractDynamic molecular crystals combining multiple and finely tunable functionalities are attracting...
Source: Small - April 17, 2024 Category: Nanotechnology Authors: Susobhan Das,
Luca Catalano,
Yves Geerts Tags: Research Article Source Type: research
An All ‐In‐One Integrating Strategy for Designing Platinum(II)‐Based Supramolecular Polymers for Photocatalytic Hydrogen Evolution
A series of chalcogenoviologen-containing platinum(II)-based supramolecular polymers featuring distinctive donor –acceptor structures for efficient hydrogen evolution is designed. Incorporating the photosensitizer, electron transfer mediator and catalyst into a unified photocatalytic system can minimize the electron transfer distance between photosensitizer and active sites, reducing the possibility of elect ron–hole recombination and enhancing the photocatalytic performance. AbstractOrganic polymer photocatalysts have achieved significant progress in photocatalytic hydrogen evolution, while developing the integrated o...
Source: Small - April 16, 2024 Category: Nanotechnology Authors: Yanyan Qin,
Pengfei She,
Yidi Wang,
Wai ‐Yeung Wong Tags: Research Article Source Type: research
Room ‐Temperature High‐Performance Photodetector and Phototransistor Based on PdSe2/ZnIn2S4 Alloy Heterojunctions
PdSe2/sulfur vacancies-ZnIn2S4 (Sv-ZIS) alloy heterojunction connected by chemical bonding is proposed for realizing efficient photogenerated carrier transfer. Thanks to the tight interfacial contact and enhanced light absorption of the heterojunction, the as-fabricated photodetectors exhibit excellent performance in terms of photocurrent, switching ratio, responsivity, and detectivity. Moreover, the transistor with gate voltage modulation capability amplifies the photocurrent to the milliampere level and increases the responsivity. AbstractVarious semiconductor devices have been developed based on 2D heterojunction materi...
Source: Small - April 16, 2024 Category: Nanotechnology Authors: Mingchao Li,
Wei Guan,
Cihui Liu,
Fangjian Xing,
Yubin Zheng,
Yunsong Di,
Guiyuan Cao,
Shibiao Wei,
Ying Wang,
Guofeng Yang,
Liyan Yu,
Zhixing Gan Tags: Research Article Source Type: research
Harnessing Pb –S Interactions for Long‐Term Water Stability in Cesium Lead Halide Perovskite Nanocrystals
By employing a ligand exchange strategy with (11-mercaptoundecyl)-N,N,N-trimethylammonium bromide (MUTAB), the authors capitalized on lead-sulfur (Pb −S) interactions. MUTAB passivates the nanocrystal (NC) surface, ensuring water dispersibility and stability, unlike oleyl amine/oleic acid (OAm/OAc)-capped counterparts prone to rapid degradation. The optoelectronic properties of MUTAB-stabilized NCs are validated through efficient 3,3′,5,5′- tetramethylbenzidine (TMB) oxidation under visible light irradiation. AbstractLead halide perovskite nanocrystals (LHP NCs) have garnered attention as promising light-harvesting m...
Source: Small - April 16, 2024 Category: Nanotechnology Authors: Monika Ahlawat,
Ankita Sahu,
Vishal Govind Rao Tags: Research Article Source Type: research
Ultrathin, Mechanically Durable, and Scalable Polymer ‐in‐Salt Solid Electrolyte for High‐Rate Lithium Metal Batteries
Al2O3 coated polyethylene (PE/AO) separators are proposed to fabricate ultrathin, mechanically durable, and scalable polymer-in-salt (PIS) solid-state electrolytes. The Al2O3 coating significantly improves the wettability, mechanical durability, and thermal stability of PIS electrolytes. The resulting PE/AO@PIS thus exhibits favorable ionic transferability for high-rate solid-state lithium-metal-based symmetrical and full cells. AbstractPolymer-in-salt solid-state electrolytes (PIS SSEs) are emerging for high room-temperature ionic conductivity and facile handling, but suffer from poor mechanical durability and large thick...
Source: Small - April 16, 2024 Category: Nanotechnology Authors: Long Pan,
Shengfa Feng,
Hui Sun,
Xiong Xiong Liu,
Pengcheng Yuan,
Mufan Cao,
Min Gao,
Yaping Wang,
ZhengMing Sun Tags: Research Article Source Type: research
Microneedle Patch for Transdermal Sequential Delivery of KGF ‐2 and aFGF to Enhance Burn Wound Therapy
Transdermal Co-delivery of growth factors combination for enhanced therapy of burn wound. AbstractSevere burn wounds usually destroy key cells ’ functions of the skin resulting in delayed re-epithelization and wound regeneration. Promoting key cells’ activities is crucial for burn wound repair. It is well known that keratinocyte growth factor-2 (KGF-2) participates in the proliferation and morphogenesis of epithelial cells while acidic fibroblast growth factor (aFGF) is a key mediator for fibroblast and endothelial cell growth and differentiation. However, thick eschar and the harsh environment of a burn wound often d...
Source: Small - April 16, 2024 Category: Nanotechnology Authors: Huacheng He,
Wen Huang,
Shihui Zhang,
Jie Li,
Jian Zhang,
Bingxin Li,
Jie Xu,
Yuting Luo,
Huiling Shi,
Yue Li,
Jian Xiao,
Odinaka Cassandra Ezekiel,
Xiaokun Li,
Jiang Wu Tags: Research Article Source Type: research
Orientation Manipulation and Defect Passivation for Perovskite Solar Cells by a Natural Compound
This study reveals that tea saponin (TS), a natural compound serves as a SnO2 modifier, facilitates optimal growth of perovskite crystals on the (111) facet. The modification promotes preferential crystal orientation through hydrogen bond and Lewis coordination. TS forms a chelate with SnO2, resulting in a smoother film and n-type doping, leading to improved carrier extraction and reduced defects. The TS-modified perovskite solar cells achieve a champion efficiency of 24.2%, leveraging from an obvious enhancement of open-circuit voltage (Voc) of 1.18 V and fill factor (FF) of 82.8%. The devices also demonstrate enhanced ...
Source: Small - April 16, 2024 Category: Nanotechnology Authors: Yunfei Ouyang,
Zeping Ou,
Ibrahim Mwamburi Mwakitawa,
Tianyu Xia,
Yi Pan,
Can Wang,
Qin Gao,
Bo Zhang,
Kun Chen,
Zijuan He,
Tatyana Shumilova,
Bing Guo,
Yujie Zheng,
Tingming Jiang,
Zhu Ma,
Kuan Sun Tags: Research Article Source Type: research
Suppressing Deep ‐Level Trap Toward Over 13% Efficient Solution‐Processed Kesterite Solar Cell
In this study, a NaOH-Se intermediate layer introduced at the back interface can optimize Cu2ZnSnS4 (CZTS)precursor films and subsequently adjust the Se and alkali metal content to favor grain growth during selenization. Through this back interface engineering, issues such as non-uniform grain arrangement on the surface, voids in bulk regions, and poor contact at the back interface of absorber layers are effectively addressed. This method not only optimizes morphology but also suppresses deep-level defect formation, thereby promoting carrier transport at both interfaces and bulk regions of the absorber layer. Consequently,...
Source: Small - April 16, 2024 Category: Nanotechnology Authors: Yingfen Li,
Yue Jian,
Fang Huang,
Nian Zhou,
Wanqiu Chai,
Juguang Hu,
Jun Zhao,
Zhenghua Su,
Shuo Chen,
Guangxing Liang Tags: Research Article Source Type: research
Deep Electron Redistributions Induced by Dual Junctions Facilitating Electroreduction of Dilute Nitrate to Ammonia
By constructing the ternary catalyst Co/Co3O4@NC, the electron transfer is relayed through the double heterojunction of Co@Co3O4 and Co3O4@NC, resulting in the deep electronic regulation of Co. As a result, Co/Co3O4@NC exhibits superior performance for diluting electrochemical NO3− reduction reaction (NO3RR) over ever-reported Co-based electrocatalysts. This work provides a promising strategy for deep electronic state regulation of electrocatalysts. AbstractThe electronic states of metal catalysts can be redistributed by the rectifying contact between metal and semiconductor e.g., N-doped carbon (NC), while the interfaci...
Source: Small - April 16, 2024 Category: Nanotechnology Authors: Lu ‐Hua Zhang,
Bo Zhang,
Yaohua Hong,
Yang You,
Yuzhuo Zhou,
Jiayu Zhan,
David Alonzo Poole III,
Fengshou Yu Tags: Research Article Source Type: research
A Novel Induction ‐Type Pressure Sensor based on Magneto‐Stress Impedance and Magnetoelastic Coupling Effect for Monitoring Hand Rehabilitation
A novel induction-type pressure sensor based on magneto-stress impedance and magnetoelastic coupling effect is proposed. The sensor exhibits a wide sensing range (up to 1 MPa), excellent robustness (over 15 000 cycles), fast response/recovery, and superior linearity within 100 kPa. When integrated into a split-fingerboard, the sensor with a capacitor can monitor hand rehabilitation effectiveness sensitively and robustly. AbstractVisualization of training effectiveness is critical to patients ’ confidence and eventual rehabilitation. Here, an innovative magnetoinductive pressure sensor is proposed for monitoring hand reha...
Source: Small - April 16, 2024 Category: Nanotechnology Authors: Zihao Zhu,
Diana Estevez,
Tangfeng Feng,
Yanlin Chen,
Yunlong Li,
Huijie Wei,
Yuchen Wang,
Yunfei Wang,
Lizhong Zhao,
Syed Arsalan Jawed,
Faxiang Qin Tags: Research Article Source Type: research
