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Performance Enhancement of Transparent and Flexible Triboelectric Nanogenerator Based on One-Dimensionally Hybridized Copper/Polydimethylsiloxane Film

SSRN

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SSRN 2022年

作者： Li, Gui-Zhong Cai, Ya-Wei Wang, Gui-Gen Sun, Na Li, Fei Zhou, Hai-Ling Zhang, Xiao-Nan Zhao, Hai-Xu Wang, Yuanhao Han, Jie-Cai Yang, Ya Shenzhen518055 China CAS Center for Excellence in Nanoscience Beijing Key Laboratory of Micro-Nano Energy and Sensor Beijing Institute of Nanoenergy and Nanosystems Chinese Academy of Sciences Beijing101400 China SUSTech Engineering Innovation Center School of Environmental Science and Engineering Southern University of Science and Technology Guangdong Shenzhen518055 China National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Harbin Institute of Technology Harbin150080 China School of Nanoscience and Technology University of Chinese Academy of Sciences Beijing100049 China College of Mechanical and Electrical Engineering Wenzhou University Wenzhou325035 China

Wearable/portable devices are essential for the automation, intelligence and digitization of next-generation electronic products. However, it is still challenging to obtain a kind of flexible, transparent and lightweight power source for these. Here, both a dual-electrode poly-(dimethylsiloxane)/copper nanowires (PDMS/Cu NWs) based TENG and a single-electrode mode TENG based on half-embedded Cu NWs electrode and PDMS/Cu NWs negative friction layer was fabricated by cost-effective and feasible methods. Respectively, these as-obtained TENGs show good flexibilities and transparency. Meanwhile, the two kinds of TENG exhibit high output voltages and power densities of 120 V and 2.0 W/m 2 , 45 V and 0.135 W/m 2 , respectively. The enhancements are ascribed to the increase of capacitance and electron flow in the friction layers caused by doping Cu NWs. The advantages of the PDMS/Cu NWs based TENG include the ease of fabrication, good biocompatibility, flexibility and transparency, empowering it as a promising sustainable method for obtaining daily environmental energy as a self-powered source to drive wearable/portable electronic devices. © 2022, The Authors. All rights reserved.

关键词： Nanogenerators

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A simple and economic method to modify large organic surfaces for enhancing adhesion and transparent Au/PMMA with high electromagnetic shielding efficiency

表面科学技术（英文）

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表面科学技术（英文） 2024年第1期2卷 139-148页

作者： Gang Gao Shiqi Zeng Kun Li Chao Duan Yujie Qin Lei Yang Hong Zhang Wenxin Cao Jiaqi Zhu National Key Laboratory of Science and Technology On Advanced Composites in Special Environments Harbin Institute of TechnologyHarbin 150080People's Republic of China Center of Analysis Measurement Harbin Institute of TechnologyHarbin 150001People's Republic of China Zhengzhou Research Institute Harbin Institute of TechnologyZhengzhou 450046People's Republic of China National Key Laboratory of Science and Technology On Advanced Composites in Special Environments Harbin Institute of TechnologyHarbin 150080People's Republic of China Zhengzhou Research Institute Harbin Institute of TechnologyZhengzhou 450046People's Republic of China

This study introduces a simple and cost-effective approach for modifying large organic surfaces,facilitating robust adhesion between Au films and polymethyl methacrylate(PMMA)while retaining transparency to visible light and effectively shielding against electromagnetic interference(EMI).The proposed surface modification method employs a cheap low-power conventional UV lamp to illuminate organic surfaces in an open environment,rend-ing it convenient and applicable for surfaces ranging from small to massive,irrespective of size,shape and *** subjecting transparent PMMA glass to a brief 20-30 min exposure to a 36 W UV lamp positioned 5 cm away from the sample surface,the PMMA surface is dramatically modified and the surface is turned from hydrophobic to hydrophilic,establishing a strong adhesion between PMMA and Au *** resulting Au/PMMA glass exhibits remarkable transparency about 70％within the visible light spectrum,coupled with an impressive EMI shielding efficiency that surpasses 20 dB across a broad range of electromagnetic wavebands,encompassing the S,C,X and Ku bands that correspond to the wave frequencies of major electromagnetic pollution and crucial applications of 5G communication,credit card validation,radar systems,traffic control,*** characterizations have been con-ducted,elucidating the underlying *** study presents an important advancement,and the accessible and scalable nature of the large-scalable surface modification method has far-reaching implications across numerous industrial sectors and applications,in addition to transparent EMI shielding Au/PMMA glasses.

关键词： Au films PMMA glass Transparency Electromagnetic shielding efficiency

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Inter-layer superlubricity in a carbon nanotube array induced by high-temperature annealing

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Physical chemistry chemical physics : PCCP 2025年第23期27卷 2025 Jun 2页

作者： Yunlong Fan Yushun Zhao Kaiyi Zheng Yingxia He Chao Sui Xiaodong He Chao Wang School of Astronautics Harbin Institute of Technology Harbin 150001 China. yushunzhao@***. Center for Composite Materials and Structures Harbin Institute of Technology Harbin 150080 China. National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Harbin Institute of Technology Harbin 150080 China.

The development of strong and ultra-stretchable CNT-based materials remains a key focus in high-tech industries. High-temperature annealing presents a promising approach to fabricating highly fused CNT-based materials, where individual CNTs merge into highly interconnected structures. To understand the underlying mechanisms, a large-scale atomic/molecular massively parallel simulator (LAMMPS) is utilized to conduct molecular dynamics (MD) simulations. Accurate CEDIP and AIREBO potentials are selected to model the dynamic behavior of carbon atoms during the annealing and compression processes. The results demonstrate that a highly connected CNT array can transition into a compact graphene-like structure through the fusion of inter-tube covalent bonds. Additionally, simulations of lateral compression, tension, and cyclic loading reveal that the mechanical properties of annealed CNT arrays are strongly influenced by their structural morphology. Moreover, inter-tube and inter-layer sliding and failure behavior significantly impact the resulting mechanical properties. In this study, the maximum stretchability of the annealed CNT array reaches up to 700%. This work sheds light on the intrinsic structural evolution of CNT arrays under high-temperature annealing and provides valuable theoretical insights for the design of next-generation CNT-based metamaterials.

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The low-entropy hydration shell at the binding site of spike RBD determines the contagiousness of SARS-CoV-2 variants

arXiv

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arXiv 2022年

作者： Yang, Lin Guo, Shuai Hou, Chengyu Li, Jiacheng Shi, Liping Liao, Chenchen Shi, Rongchun Ma, Xiaoliang Zheng, Bing Fang, Yi Ye, Lin He, Xiaodong National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Center for Composite Materials and Structures Harbin Institute of Technology Harbin150080 China School of Aerospace Mechanical and Mechatronic Engineering The University of Sydney NSW2006 Australia School of Electronics and Information Engineering Harbin Institute of Technology Harbin150080 China School of Chemistry and Materials Science Heilongjiang University Harbin150001 China Mathematical Science Institute The Australian National University CanberraACT0200 Australia Shenzhen STRONG Advanced Materials Research Institute Co. Ltd. Shenzhen518035 China

The infectivity of SARS-CoV-2 depends on the binding affinity of the receptor-binding domain (RBD) of the spike protein with the angiotensin converting enzyme 2 (ACE2) receptor. The calculated RBD-ACE2 binding energies indicate that the difference in transmission efficiency of SARS-CoV-2 variants cannot be fully explained by electrostatic interactions, hydrogen-bond interactions, van der Waals interactions, internal energy, and nonpolar solvation energies. Here, we demonstrate that low-entropy regions of hydration shells around proteins drive hydrophobic attraction between shape-matched low-entropy regions of the hydration shells, which essentially coordinates protein-protein binding in rotational-configurational space of mutual orientations and determines the binding affinity. An innovative method was used to identify the low-entropy regions of the hydration shells of the RBDs of multiple SARS-CoV-2 variants and the ACE2. We observed integral low-entropy regions of hydration shells covering the binding sites of the RBDs and matching in shape to the low-entropy region of hydration shell at the binding site of the ACE2. The RBD-ACE2 binding is thus found to be guided by hydrophobic collapse between the shape-matched low-entropy regions of the hydration shells. A measure of the low-entropy of the hydration shells can be obtained by counting the number of hydrophilic groups expressing hydrophilicity within the binding sites. The low-entropy level of hydration shells at the binding site of a spike protein is found to be an important indicator of the contagiousness of the coronavirus. © 2022, CC BY.

关键词： SARS

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Stability Criterion for Electrodeposition in Solid-State Batteries with Metallic Anodes

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PRX Energy 2024年第1期3卷 013010-013010页

作者： Yuanpeng Liu Jiawei Zhang Bowen Zhang Haowen Gao Dongjiang Chen Mingsheng Wang Changguo Wang Center for Composite Materials Harbin Institute of Technology Harbin 150001 China National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Harbin Institute of Technology Harbin 150080 China State Key Laboratory of Physical Chemistry of Solid Surfaces College of Materials Xiamen University 361005 Xiamen China State Key Laboratory of Electronic Thin Film and Integrated Devices University of Electronic Science and Technology of China Chengdu 610054 China

We establish an analytical criterion for stable electrodeposition by combining electrochemistry and mechanics. In situ experiments combined with molecular simulations are performed to validate the robustness of the theoretical predictions. Our analysis shows that stable electrodeposition is intimately linked with the interfacial defect size, fracture toughness, and molar volume of solid electrolytes. We find an exponential scaling law between the critical current density and the interfacial defect size, and the inherent softening in strength of grain boundaries lowers the critical current density in polycrystalline solid electrolytes. Modeling and analyses provide roadmaps to design solid electrolytes with metallic anodes for achieving stable electrodeposition.

关键词： Electrochemical properties Solid-state batteries Surface instabilities Solid-solid interfaces

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Corrigendum to ‘Experimental investigation of thermal architected metamaterials for regulating transient heat transfer’ [International Journal of Heat and Mass Transfer volume 193 (2022) 1–10/122960]

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International Journal of Heat and Mass Transfer 2023年 211卷

作者： Xingwei Zhang Xiao He Linzhi Wu Key Laboratory of Advanced Ship Materials and Mechanics College of Aerospace and Civil Engineering Harbin Engineering University Harbin 150001 China National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Harbin Institute of Technology Harbin 150080 China Center for Composite Materials Harbin Institute of Technology Harbin 150001 China

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Construction of a controllable dual-channel structure of Al2O3 and boron nitride within cellulose nanofiber composite films to improve through-plane thermal conductivity

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Polymer 2025年 330卷

作者： Zhou, Weiguang Sun, Mingqi Yang, Lei Fang, Jing Zhu, Jiaqi Yan, Chenxin Liu, Xiongjun Han, Xiao Gao, Junguo School of Materials Science and Chemical Engineering Harbin University of Science and Technology Harbin150080 China Center of Analysis Measurement Harbin Institute of Technology Harbin150001 China National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Harbin Institute of Technology Harbin150080 China Jiangsu Shangshang Cable Group Co. Ltd Liyang213300 China

Cellulose nanofiber-based thermal interface materials demonstrate significant potential for application in miniaturized electronic devices with high-power. However, they face a significant limitation: low through-plane thermal conductivity (TC). In this study, we designed a novel dual-channel structure through leveraging volumetric exclusion effect of a thermoplastic polyurethane (TPU) template during vacuum filtration process. A primary channel was constructed based on a cherimoya-like core-shell structure (TPU@Al2O3), wherein TPU microspheres served as the core and spherical Al2O3 constituted the shell. Meanwhile, functional boron nitride (f-BN) was assembled into interstitial spaces of these biomimetic core-shell particles to form an auxiliary channel. These films with 16 vol% Al2O3 and 20 vol% f-BN can achieve a through-plane TC of 2.07 W/mK, representing a thermal conductivity enhancement (TCE) ratio of 508 %. The synergistic efficiency between Al2O3 and f-BN attains an exceptional value (159.8 %), which is resulted from the high matching degree (0.413) between their phonon density of states. Thermal conduction behavior of composite films with distinct structures was simulated to investigate the mechanism of the TCE through the transient-state finite element method via COMSOL. Meanwhile, the films with the dual-channel structure exhibit excellent performance of thermal management as thermal interface materials (TIMs), effectively reducing the operating temperature of a central processing unit (CPU) with a powder dissipation of 253 W to 35 °C, which is lower than 22 °C compared to pure CNF. The innovative design of dual-channel structures in films pave the way for broad applications of CNF in the thermal management of electronic devices. © 2025

关键词： Cellulose films

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Reconstruction of Ferromagnetic/Paramagnetic Cobalt-Based Electrocatalysts under Gradient Magnetic Fields for Enhanced Oxygen Evolution

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Angewandte Chemie 2024年第46期136卷

作者： Shengyu Ma Kaixi Wang Moniba Rafique Prof. Jiecai Han Qiang Fu Sida Jiang Prof. Xianjie Wang Tai Yao Prof. Ping Xu Bo Song School of Physics Harbin Institute of Technology 150001 Harbin China Zhengzhou Research Institute Harbin Institute of Technology 450046 Zhengzhou China National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Harbin Institute of Technology 150001 Harbin China Laboratory for Space Environment and Physical Sciences Harbin Institute of Technology 150001 Harbin China State Key Laboratory of Space Power-Sources School of Chemistry and Chemical Engineering Harbin Institute of Technology 150001 Harbin China National Key Laboratory of Laser Spatial Information 150001 Harbin China Frontier Research Center of Space Environment Interacting with Matter Harbin Institute of Technology 150001 Harbin China

The rational manipulation of the surface reconstruction of catalysts is a key factor in achieving highly efficient water oxidation, but it is a challenge due to the complex reaction conditions. Herein, we introduce a novel in situ reconstruction strategy under a gradient magnetic field to form highly catalytically active species on the surface of ferromagnetic/paramagnetic CoFe 2 O 4 @CoBDC core–shell structure for electrochemical oxygen evolution reaction (OER). We demonstrate that the Kelvin force from the cores’ local gradient magnetic field modulates the shells’ surface reconstruction, leading to a higher proportion of Co 2+ as active sites. These Co sites with optimized electronic configuration exhibit more favorable adsorption energy for oxygen-containing intermediates and lower the activation energy of the overall catalytic reaction. As a result, a significant enhancement in OER performance is achieved with a large current density increment about 128 % at 1.63 V and an overpotential reduction by 28 mV at 10 mA cm −2 after reconstruction. Interestingly, after removing the external magnetic field, the activity could persist for over 100 h. This work showcases the directional surface reconstruction of catalysts under a gradient magnetic field for enhanced water oxidation.

关键词： Gradient magnetic field oxygen evolution reaction electrochemical reconstruction ferromagnetic/paramagnetic electrocatalyst divalent cobalt

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Calcined polycyclotriphosphazene@NiAl-LDH@RhxNi1-x: A novel hierarchically oriented composition tunable catalyst for green and sustainable hydrogen generation

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Journal of environmental Chemical Engineering 2022年第3期10卷

作者： Abbas, Yasir Zuhra, Zareen Majeed, Sahresh Khan, Muhammad Shuaib Basharat, Majid Tyagi, Deependra Ali, Shafqat Wu, Zhanpeng Liu, Zhaojun Department of Electrical and Electronic Engineering Southern University of Science and Technology 1088 Xueyuan Blvd Nanshan District Shenzhen518055 China State Key Laboratory of Organic-Inorganic Composites Beijing University of Chemical Technology Beijing100029 China Department of Environment and Civil Engineering Dongguan University of Technology Dongguan523808 China Institute of Chemical Sciences Bahauddin Zakariya University Multan60800 Pakistan Xi'An Jiaotong University Xi'an710049 China Institute for Advanced Study Shenzhen University Nanhai Avenue 3688 Shenzhen518060 China

The ever decreasing amount of fossil fuels and increasing environmental pollution are alarming threats for green and sustainable future. Designing a new catalyst is, therefore, of paramount significance in the quest to discover sustainable, robust, and environmentally benign materials for clean and sustainable energy generation. Herein, we developed a hierarchically oriented catalyst of calcined poly(ferrocenedimethano)-cyclotriphosphazene-microspheres (CPFC-MS) supported with nickel-aluminum layered double hydroxide and decorated with nanoparticles (NPs) of rhodium-nickel, NiAl-LDH@RhxNi1-x (x = 2.06-6.75), for H2 generation from ammonia borane (AB) hydrolysis. The highly active catalyst was characterized by scanning electron microscopy (SEM), Raman spectroscopy, high-resolution transmission electron microscopy (HRTEM) and TEM, energy dispersive X-ray spectroscopy (EDX), fourier transform infrared (FTIR), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS). The as-fabricated CPFC-MS@NiAl-LDH@RhxNi1-x (x = 2.06-6.75) catalysts were tested for AB hydrolysis and the results showed remarkable performance and higher stability for H2 generation. The CPFC-MS@NiAl-LDH@Rh2.06Ni7.32 catalyst, having the lowest Rh-contents, exhibited maximum H2 generation with a turn over frequency (TOF) of 780 mol H2 hr-1 mol Rh-1 and an activation energy (Ea) of 40.3 kJ/mol with excellent sustainability. The superior activity is ascribed to the synergetic effect between RhNi NPs and their well-dispersion over hierarchically oriented CPFC-MS@NiAl-LDH support, while higher stability due to LDH-AlNi/RhNi attractions. This work will provide new opportunities for polyphosphazenes and LDH derived hierarchically oriented sustainable catalysts for green energy production for sustainable future. © 2022 Elsevier Ltd.

关键词： Binary alloys

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Propulsive efficiency and structural response of a sandwich composite propeller

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Applied Ocean Research 2019年 84卷 250-258页

作者： Xuting Zhang Yi Hong Fan Yang Zhonghai Xu Jianguang Zhang Wenbo Liu Rongguo Wang Science and Technology on Advanced Composites in Special Environment Laboratory Harbin Institute of Technology Harbin 150080 PR China

Studying the sandwich composite propeller (SCMP) is of great significance since the sandwich structure is lightweight and possesses high strength. This study proposes and verifies a fluid–structure interaction (FSI) method for a 3D underwater sandwich composite structure to calculate the performance of the propeller. The Reynolds-averaged Navier–Stokes formula-based computational fluid dynamics is adopted to solve for propeller loads, whereas the finite element method (FEM) is applied to solve for propeller deformations. ANSYS Workbench’s system coupling is utilized to deliver the loads and deformations in the FSI. The paper also compares the propulsive performance and structural response of the SCMP and conventional composite propeller (CMP). The impact of the structural form and core material on the SCMP is explored. The results show that the weight reduction effect of the SCMP is better than that of the CMP, the propulsive efficiency of the SCMP is higher at low advance coefficients and lower at high advance coefficients, and the maximum pitch angles of the SCMP decrease at all conditions, unlike the case for the CMP. Moreover, the thinner the facing of the SCMP, the greater the influence of the higher twist–deformation ratio of the resulting structural form on the intrinsic frequency.

关键词： Composite propeller Fluid–structure interaction Bend–twist coupling Sandwich structure

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