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Nano Research 2023年第1期16卷 1558-1567页

作者： Yangyang wang Jingyi Kong Ruifang Xue Jianping wang Min Gong Xiang Lin Liang Zhang dongrui wang School of Chemistry and Biological Engineering University of Science and Technology BeijingBeijing 100083China

Stretchable and transparent electrodes(STEs)based on silver nanowires(AgNWs)have garnered considerable attention due to their unique optoelectronic ***,the low oxidation resistance of AgNWs severely limits the reliability and durability of devices based on such *** present work reports a type of core-sheath silver@gold nanowires(Ag@Au NWs)with a morphology resembling dual-headed matchsticks and an average Au sheath thickness of 2.5 *** starting with such Ag@Au NWs,STEs with an optical transmittance of 78.7%,a haze of 13.0%,a sheet resistance of 13.5Ω·sq.−1,and a maximum tensile strain of 240%can be formed with the aid of capillary-force-induced *** resultant STEs exhibit exceptional oxidation resistance,high-temperature resistance,and chemical/electrochemical stability owing to the conformal and dense Au ***,non-enzymatic glucose biosensors are fabricated employing the Ag@Au NW *** electrocatalytic oxidation currents are proportional to glucose concentrations with a high sensitivity of 967μA·mM−1·cm−2 and a detection limit of 125μM over a detection range of 0.6 to 16 ***,the biosensors demonstrate an appealing robustness and antiinterference characteristics,high repeatability,and great stability that make them adequate for practical use.

关键词： Ag@Au core-sheath nanowire stretchable transparent electrode glucose biosensor capillary force stretchable electronics

Effect of End Shape on Flow and Heat Transfer Characteristics of Two Parallel Plates

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Journal of Thermal Science 2024年第3期33卷 815-832页

作者： ZHANG Guang HONG Tianxiao wang dongrui XIN Jialin TAO Junyu LIN Zhe Key Laboratory of Fluid Transmission Technology of Zhejiang Province Zhejiang Sci-Tech UniversityHangzhou310018China

Flow around a pair of flat plates is a basic hydrodynamics *** this paper,the flow and heat transfer characteristics of two parallel plates with different edge shapes are numerically *** different inclined angles,the influence of chamfered and rounded structures with different sizes at the end-edge on unsteady flow and heat transfer characteristics of two parallel plates are *** is found that the instability and unsteadiness of flow decrease with the increase of end-edge size,and the non-uniformity of wake velocity of both rounded and chamfered plates decreases *** non-uniformity of wake temperature increases firstly and then decreases at a small inclined angle,and the amplitude becomes the largest when S_(rou)(S_(cha))=3,while it basically keeps monotonically increasing at a large inclined ***,the global heat transfer performance of the flat plate is obviously affected by the end-edge modification,especially the chamfered *** the increase of chamfered size,the global Nusselt number basically shows the decreasing *** study provides a theoretical basis for the application of plate-shape structure in engineering fields.

关键词： two parallel plates end shape flow characteristic heat transfer numerical simulation

Accurate Prediction of Au--P Bond Strengths by Density Functional Theory Methodst

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Chinese Journal of Chemistry 2013年第2期31卷 200-208页

作者： Haizhu Yu Dingjia Liu Zhimin Dang dongrui wang Yao Fu Department of Polymer Science and Engineering University of Science and Technology Beijing Beijing 100083 China Department of Chemistry University of Science and Technology of China Hefei Anhui 230026 China

The recent development of Au-catalyzed reactions has greatly enriched the methods of organic synthesis. The phosphine or phosphate-coordinated Au complexes have shown high efficiency in catalyzing various C--C and C-- H activations. In many of these reactions, the Au--P bond strength was found to play an important role in deter- mining the catalytic efficiency. In the present study, the accuracy of different theoretical methods for prediction of Au--P strengths has been examined on basis of the experimental enthalpy changes between different CIAu（PR3） and C1Au（THT）（THT----tetrahydrothiophene）. By comparing the different DFT functionals （e.g. B3LYP, TPSS, M06）, different basis sets （including the different effective core potentials on Au and the total electron basis sets on all other atoms）, and different solution phase single point calculations, we found that the TPSS/（CPE-121G＋f： 6-311 ＋G（d,p）（SMD）//TPSS/（CPE-121G：6-31G（d）（M1） method gives the best correlations with the available experimental results. Meanwhile, the calculations with B3LYP//TPSS and MOS//TPSS also give comparable calculation results. Finally, the specified method （M1） is used to calculate the Au--P bond dissociation enthalpies and energies of different C1Au（PR3）/CIAu（P（OR）3） complexes. By accurately reproducing the available experimental results, we believe that the method （M1） is reliable for the theoretical analysis of Au-P systems.

关键词： DFT Au--P BDE phosphine phosphate

Boosting the Energy Density of Flexible Asymmetric Supercapacitor with Three Dimensional Fe2O3 Composite Brush Anode

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Chemical Research in Chinese Universities 2020年第1期36卷 97-104页

作者： GAO Yuan ZHOU Ruitao wang dongrui HUANG Qiyao CHENG Ching-Hsiang ZHENG Zijian Laboratory for Advanced Interfacial Materials and Devices Institute of Textiles and ClothingThe Hong Kong Polytechnic UniversityHong Kong SARP.R.China Department of Industrial and Systems Engineering The Hong Kong Polytechnic UniversityHong Kong SARP.R.China

Flexible asymmetric supercapacitor is fabricated with three dimensional(3D)Fe2O3/Ni(OH)2 composite brush anode and Ni(OH)2/MoO2 honeycomb *** for 3D composite brush anode,a layer of thin Fe2O3 film is firmly adhered on a 3D Ni brush current collector with the assist of Ni(OH)2,functioning as both adherence layer and pseudocapacitive active *** unique 3D Ni brush current collector possesses large surface area and stretching architecture,which facilitate to achieve the composite anode with high gravimetric capacitance of 2158 F/*** terms of cathode,Ni(OH)2 and MoO2 have a synergistic effect to improve the specific capacitance,and the resulting Ni(OH)2/MoO2 honeycomb cathode shows a very high gravimetric capacitance up to 3264 F/*** asymmetric supercapacitor(ASC)has balanced cathode and anode,and exhibits an ultrahigh gravimetric capacitance of 1427 F/g and an energy density of 476 W·h/*** energy density of ASC is 3-4 times higher than those of other reported aqueous electrolyte-based supercapacitors and even comparable to that of commercial lithium ion *** device also shows marginal capacitance degradation after 1000 cycles'bending test,demonstrating its potency in the application of flexible energy storage devices.

关键词： Asymmetric supercapacitor High energy density Flexible device Three dimensional(3D) Fe2O3 compo-site anode

Supramolecular-mediated ball-in-ball porous carbon nanospheres for ultrafast energy storage

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InfoMat 2022年第4期4卷 112-123页

作者： Lei Yao Junsheng Lin Yuanyuan Chen Xiujuan Li dongrui wang Haitao Yang Libo Deng Zijian Zheng College of Materials Science and Engineering Shenzhen UniversityShenzhenP.R.China Laboratory for Advanced Interfacial Materials and Devices Institute of Textiles and ClothingThe Hong Kong Polytechnic UniversityHong Kong SARChina College of Chemistry and Environmental Engineering Shenzhen UniversityShenzhenP.R.China

Hierarchical porous carbons are the most viable electrode material for supercapacitors because of their balanced capacitive performance and chemical *** pore connectivity plays a pivotal role in electrolyte transport,which is quantified by a new parameter,defined in this work as the longest possible pore separation(LPPS).Herein,we report hierarchical porous carbon nanospheres(HPC-NS)with a unique ball-in-ball structure,which is achieved by the pyrolysis of a supramolecular complex ofγ-cyclodextrin(γ-CD)/PEO-PPO-PEO(F127).This approach differs from the conventional softtemplating method in that,apart from the assembly of the monomicelles that leads to the host nanospheres(approximately 300 nm),theγ-CD-containing monomicelles themselves are converted to small porous carbon nanospheres(<10 nm),which results in an ultralow LPPS of 10 nm,representing the bestknown pore connectivity of the HPC *** HPC-NS delivers a high specific capacitance(405 F g^(-1)at 1 A g^(-1)and 71%capacitance retention at 200 A g^(-1)),wide voltage window(up to 1.6 V),and simultaneously high energy and power densities(24.3 Wh kg^(-1)at a power density of 151 W kg^(-1)and 9 Wh kg^(-1)at 105 W kg^(-1))in aqueous *** new strategy boosts the development of porous carbon electrodes for aqueous supercapacitors with simultaneously high power and energy densities.

关键词： hierarchical porous carbon pore connectivity supramolecular ultrafast energy storage

Crumpled,high-power,and safe wearable Lithium-Ion Battery enabled by nanostructured metallic textiles

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Fundamental Research 2021年第4期1卷 399-407页

作者： dongrui wang Jian Chang Qiyao Huang Dongdong Chen Peng Li Yau-Wai Denis Yu Zijian Zheng Laboratory for Advanced Interfacial Materials and Devices Research Centre for Smart Wearable TechnologyInstitute of Textiles and ClothingThe Hong Kong Polytechnic UniversityHong Kong SARChina School of Energy and Environment and Center of Super-Diamond and Advanced Films(COSDAF)City University of Hong KongTat Chee AvenueHong Kong SARChina Research Institute for Smart Energy The Hong Kong Polytechnic UniversityHong Kong SARChina School of Chemistry and Biological Engineering University of Science and Technology BeijingBeijing100083China Academy for Advanced Interdisciplinary Studies Southern University of Science and TechnologyShenzhen 518055China EPRO Advance Technology Limited Yuen LongHong Kong SARChina Institute of Microscale Optoelectronics Shenzhen UniversityShenzhen 518055China

Textile-based flexible Lithium-Ion Batteries(LIBs)show promising mechanical flexibility that is appealing for a wide variety of wearable and flexible electronic *** flexibility of flexible LIBs nowadays is still *** addition,their power performance is too low to enable high-speed charging,due to the low conductivity of the ***,we develop highly electrically conductive metallic fabrics,which are fabricated by coating nanostructured Ni or Cu(nano-reliefs)on woven cotton fabrics,as current collectors to enable crumpled,high-power,and safe wearable *** nanostructured metal coating not only effectively increases the contact area between current collectors and active materials,but also shortens the charge carrier transport paths,so that LIBs constructed on these nanostructured metallic cotton fabrics exhibit a high power density of 439 W/L and superior electrochemical stability under various mechanical deformations including folding,twisting,squeezing,and *** type of nanostructured metallic textile is highly desirable for portable and wearable electronic applications.

关键词： Energy storage Wearable electronics Metallic textile Nanostructure Flexible battery

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偶氮嵌段共聚物合成、自组装与光响应性

化工学报 2010年第7期61卷 1713-1719页

作者：王东瑞王晓工清华大学化学工程系高分子研究所北京100084

含偶氮苯基团的嵌段共聚物兼具偶氮聚合物和嵌段共聚物的特点,可自组装形成具有特殊光响应性能的各种纳米/亚微米结构,在光信息存储、传感器、药物输送、光控智能材料等领域有重要的应用前景。本文对本课题组近年来在含强推拉电子型偶... 详细信息

含偶氮苯基团的嵌段共聚物兼具偶氮聚合物和嵌段共聚物的特点,可自组装形成具有特殊光响应性能的各种纳米/亚微米结构,在光信息存储、传感器、药物输送、光控智能材料等领域有重要的应用前景。本文对本课题组近年来在含强推拉电子型偶氮生色团的嵌段共聚物合成、自组装与光响应性方面的研究工作进行简要综述。

关键词：嵌段共聚物偶氮聚合物自组装光响应性

Interfacial engineering of printable bottom back metal electrodes for full-solution processed flexible organic solar cells

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Journal of Semiconductors 2018年第1期39卷 215-223页

作者： Hongyu Zhen Kan Li Yaokang Zhang Lina Chen Liyong Niu Xiaoling Wei Xu Fang Peng You Zhike Liu dongrui wang Feng Yan Zijian Zheng Nanotechnology Center Institute of Textiles and Clothing the Hong Kong Polytechnic University Hong Kong SAR China College of Materials Science and Engineering Fujian Key Laboratory of Polymer Materials Fujian Normal University Fuzhou 350007 China College of Science Center for Optics & Optoelectronics Research Zhejiang University of Technology Hangzhou 310014China State Key Laboratory of Modern Optical Instrumentation Zhejiang University Hangzhou 310027 China Department of Applied Physics the Hong Kong Polytechnic University Hong Kong SAR China

Printing of metal bottom back electrodes of flexible organic solar cells（FOSCs） at low temperature is of great significance to realize the full-solution fabrication technology. However, this has been difficult to achieve because often the interfacial properties of those printed electrodes, including conductivity, roughness, work function,optical and mechanical flexibility, cannot meet the device requirement at the same time. In this work, we fabricate printed Ag and Cu bottom back cathodes by a low-temperature solution technique named polymer-assisted metal deposition（PAMD） on flexible PET substrates. Branched polyethylenimine（PEI） and ZnO thin films are used as the interface modification layers（IMLs） of these cathodes. Detailed experimental studies on the electrical, mechanical, and morphological properties, and simulation study on the optical properties of these IMLs are carried out to understand and optimize the interface of printed cathodes. We demonstrate that the highest power conversion efficiency over 3.0% can be achieved from a full-solution processed OFSC with the device structure being PAMDAg/PEI/P3 HT：PC61BM/PH1000. This device also acquires remarkable stability upon repeating bending tests.

关键词： polymer-assisted metal deposition full-solution processed flexible organic solar cells printed electrodes interface modification layers

Optimality Conditions for Double-sparsity Constrained Optimization

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数学进展 2024年第6期53卷 1145-1157页

作者： wang dongrui XIU Naihua ZHOU Shenglong School of Mathematics and Statistics Beijing Jiaotong UniversityBeijing100044P.R.China

Sparse optimization has witnessed advancements in recent decades,and the step function finds extensive applications across various machine learning and signal processing *** paper integrates zero norm and the step function to formulate a doublesparsity constrained optimization problem,wherein a linear equality constraint is also taken into *** defining aτ-Lagrangian stationary point and a KKT point,we establish the first-order and second-order necessary and sufficient optimality conditions for the ***,we thoroughly elucidate their relationships to local and global optimal ***,special cases and examples are presented to illustrate the obtained theorems.

关键词： double-sparsity constrained optimization Lagrangian stationary point KKT point optimality condition

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基于MEMS加速度计的单轴数字倾角传感器

固体电子学研究与进展 2013年第5期33卷 454-457页

作者：刘梅王冬蕊南京电子器件研究所南京210016

在分析MEMS加速度传感器测量倾角的原理和方法的基础上,设计了基于MEMS双轴加速度传感器的数字化全量程单轴倾角传感器,并介绍了其软硬件实现。通过分析加速度传感器的安装误差及X轴和Y轴的灵敏度差异,给出了加速度传感器的参数校正算法... 详细信息

在分析MEMS加速度传感器测量倾角的原理和方法的基础上,设计了基于MEMS双轴加速度传感器的数字化全量程单轴倾角传感器,并介绍了其软硬件实现。通过分析加速度传感器的安装误差及X轴和Y轴的灵敏度差异,给出了加速度传感器的参数校正算法,并确定合适的测量频率与带宽,经测试,所设计的数字化单轴倾角传感器测量范围±180°,精度0.1°。

关键词：微机电系统加速度传感器数字倾角仪