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NiCoP 1D nanothorns grown on 3D hierarchically porous Ni films for high performance hydrogen evolution reaction

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Chinese Chemical Letters 2020年第3期31卷 855-858页

作者： Yaqiang Ji Jinqi Xie Ying Yang Xianzhu Fu Rong Sun chingping Wong Shenzhen Institute of Advanced Technology Chinese Academy of SciencesShenzhen 518055China Key Laboratory of Low-grade Energy Utilization Technologies and Systems Chongqing UniversityChongqing 400044China College of Materials Science and Engineering Shenzhen UniversityShenzhen 518055China Department of Electronics Engineering The Chinese University of Hong KongHong KongChina

Highly efficient,cost-effective,and durable electrocatalysts for hydrogen evolution reaction(HER)in water splitting is crucial for ene rgy conversion and sto ***,we report NiCoP 1D nanothorn arrays grown on 3D porous Ni film current collectors(Ni/NiCoP)as the novel electrocatalytic *** 3D hierarchically porous nickel films containing large 7±2μm pores and small pores less than 1μm are obtained through using hydrogen bubbles dynamic template *** NiCoP 1D nanothorns are about 70 nm in diameter and 4-8μm in *** porous Ni/NiCoP electrocatalytic electrodes demonstrate much higher catalytic activity and remarkable stability for long-term *** excellent electrocatalytic performance might be attributed to the inherent nature of highly catalytic active NiCo bimetal phosphides and the unique architecture of 1D nanothorn active materials directly integrated on the 3D hierarchically porous metallic nickel conductive *** developed electrode has been fabricated to the integrated solar-driven seawater-splitting system.

关键词： Porous Ni Current collector NiCoP nanothorns Electrochemical property Seawater-splitting system

Convective Drying of Sludge Cake

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Journal of Thermal Science 2002年第3期11卷 277-282页

作者： Jianbo Chen Xiaofeng Peng Yuan Xue Duujong Lee chingping Chu Thermal Engineering Department Tsinghua University100084 BeijingChina Department of Chemical Engineering National Taiwan UniversityTaipeiTaiwanChina

This paper presented an experimental study on convective drying of waste water sludge collected from Beijing GaoBeiDian Sewage Treatment Plant, particularly on the correlation between the observed shrinkage dynamics of sludge cake and the drying curve. During the initial stage of drying the process resembles to that of a particulate bed, in which moisture diffuses and evaporates at the upper surface. Conventional drying theory assuming a diffusion-evaporating front interprets this period of drying. Consequently, owing to the very large shrinkage ratio of the dried cake, cracks emerges and propagates on and within the cake body, whence inducing evaporating channel that facilitates the water removal. This occurrence compensates the reduction of surface area for evaporation, whence extending the constant-rate period during the test. Afterwards, the cracks meet with each other and form isolated cake piles, while the subsequent drying occur mainly within these piles and the conventional theory fails. The

关键词： sludge convective drying visualization.

hierarchical and superhydrophobic Cu/C surface derived from a lotus-leaf template

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hierarchical and superhydrophobic Cu/C surface derived from ...

Preparation and hydrophobic properties of biomorphic carbon surfaces derived from the rice and indicalamus leaves

2014中国功能材料科技与产业高层论坛

作者： Tianchi Wang Guiju Liu Benjamin Hatton Lijing Chang Jian Kong chingping Wong School of Materials Science and Engineering Nanjing University of Science and Technology Department of Materials Science and Engineering University of Toronto School of Materials Science and Engineering Georgia Institute of Technology

Many plant leaves found in nature are known to exhibit a characteristic of superhydrophobicity（’lotus leaf effect’）.The present study proposes a solution-immersion and sintering method to fabricate a highly hydrophobic Cu/C surface which retained the surface structure of lotus leaf with high *** resulting fsurface exhibited excellent superhydrophobicity,showing water contact angles（CAs）of up to165°and sliding angles（SAs）of less than5°.

关键词： superhydrophobicity lotus leaf CA SA

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Preparation and hydrophobic properties of biomorphic carbon ...

Defects and solarization in YAG transparent ceramics

2014中国功能材料科技与产业高层论坛

Superhydrophobicity is a common characteristic of many plant leaf *** the present study,a superhydrophobic biomorphic carbon surface was fabricated by sintering the rice and indicalamus leaves in argon and covering it with fluorinesilane[（Heptadecafluoro-1,1,2,2-tetradecyl）triethoxysilane].After sintering,the carbon samples retained the surface structures of the plant leaves with high *** carbon exhibited superhydrophobicity after it was covered with *** contact angles of water on these surfaces were above 160°and the slidingangleswere less than 5°.

关键词： Superhydrophobicity Carbon Water contact angle Sliding angle

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Photonics Research 2019年第5期7卷 549-557页

作者： Le Zhang Jiadong Wu Petr Stepanov Micah Haseman Tianyuan Zhou David Winarski Pooneh Saadatkia Sahil Agarwal Farida A. Selim Hao Yang Qitu Zhang Yun Wang chingping Wong Hao Chen Jiangsu Key Laboratory of Advanced Laser Materials and Devices School of Physics and Electronic Engineering Jiangsu Normal University Xuzhou 221116 China Center for Photochemical Sciences Department of Physics and Astronomy Bowling Green State University Bowling Green Ohio 43403 USA School of Materials Science and Engineering Georgia Institute of Technology Atlanta Georgia 30332 USA College of Materials Science and Engineering Nanjing Tech University Nanjing 210009 China School of Mechanical Engineering Jiangsu University Zhenjiang 212013 China

Transparent ceramics are emerging as future materials for lasers, scintillation, and illumination. In this paper, an interesting and surprising phenomenon in YAG transparent ceramics is reported. UV light leads to significant changes in the microstructure of open volume defects and nano clusters as well as in the optical properties. Lightinduced lattice relaxation is suggested as the mechanism behind this intriguing behavior. The complex F-type color center with broad absorption bands is caused by the aliovalent sintering additives(Ca^2+∕Mg^2+) and Fe ion impurities. Two individual peaks in the thermoluminescence spectra illustrate both shallow and deep level *** positron annihilation lifetime data, vacancy clusters and nanovoids are detected and characterized, although these free-volume defects could not be observed by high-resolution transmission electron microscopy. The solarization induced by UV irradiation is associated with a change in the structure and size of defect clusters due to lattice relaxation. Therefore, this work shows how UV irradiation leads not only to a change in the charge state of defects, but also to a permanent change in defect structure and size. It significantly affects the optical properties of YAG ceramics and their performance in lasers and other optical applications. These results are crucial for advancing transparent ceramics technology.

关键词： YAG future materials UV

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Nd∶YAG激光透明陶瓷的研究进展

材料导报 2017年第13期31卷 41-50页

作者：张乐周天元陈浩杨浩张其土宋波汪正平江苏师范大学物理与电子工程学院江苏省先进激光材料与器件重点实验室徐州221116 佐治亚理工学院材料科学与工程学院亚特兰大30332 南京工业大学材料科学与工程学院南京210009

作为新一代固体激光增益介质,Nd∶YAG透明陶瓷以容易制造、成本低、易于实现大尺寸生产等优势,正逐步取代单晶和玻璃材料,应用前景十分广阔。从Nd∶YAG透明陶瓷光学质量的提升、激光输出特性以及实现Nd∶YAG透明陶瓷高功率激光输出3个方... 详细信息

作为新一代固体激光增益介质,Nd∶YAG透明陶瓷以容易制造、成本低、易于实现大尺寸生产等优势,正逐步取代单晶和玻璃材料,应用前景十分广阔。从Nd∶YAG透明陶瓷光学质量的提升、激光输出特性以及实现Nd∶YAG透明陶瓷高功率激光输出3个方面,分别回顾并总结了我国、日本、美国、欧洲和俄罗斯关于Nd∶YAG激光透明陶瓷的研究进展,并概述了我国及日本关于复合结构及共掺杂Nd∶YAG透明陶瓷的发展情况。最后总结并展望了当前Nd∶YAG激光透明陶瓷的发展趋势和存在的主要问题。

关键词： Nd∶YAG透明陶瓷透过率阈值斜率效率输出功率

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面向超薄柔性器件加工的激光解键合方案

纺织学报 2018年第5期39卷 155-159页

作者：张国平夏建文刘强黄明起陈伟孙蓉汪正平中国科学院深圳先进技术研究院先进材料研究中心广东深圳518055 深圳市化讯半导体材料有限公司研发部广东深圳518055

为解决柔性超薄器件的加工精度问题,以及提高其制造良率,提出了一种可室温,无应力分离超薄柔性器件的基于激光解键合的临时键合方案。借助热失重分析、紫外可见近红外分光光度计等表征方法分别研究了紫外激光响应材料和临时键合材料这2... 详细信息

为解决柔性超薄器件的加工精度问题,以及提高其制造良率,提出了一种可室温,无应力分离超薄柔性器件的基于激光解键合的临时键合方案。借助热失重分析、紫外可见近红外分光光度计等表征方法分别研究了紫外激光响应材料和临时键合材料这2种材料的热稳定性、化学稳定性及紫外透过率等性能。结果表明,紫外激光响应材料在氮气中热质量损失5%时的温度大于597℃,临时键合材料在空气中热质量损失5%时的温度大于412℃;这2种材料所构成的键合对具有良好的耐化学稳定性;膜厚为566 nm的激光响应材料在355 nm处的紫外透过率为4.96%。最后,基于20 cm硅晶圆开展了整套工艺验证并取得了很好的结果,为将来柔性超薄芯片或者器件加工,提供了一种高可靠的解决方案。

关键词：临时键合激光解键合超薄加工柔性可穿戴

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光敏聚苯并噁唑的研究现状与发展趋势

材料导报 2020年第19期34卷 19183-19189页

作者：王涛李金辉赵雅绪朱良张少霞张国平孙蓉汪正平中国科学院深圳先进技术研究院深圳先进电子材料国际创新研究院深圳518055 中国科学院大学北京100049 佐治亚理工学院材料科学与工程学院亚特兰大30332

作为耐热光敏绝缘介质材料的典型代表之一,光敏聚苯并噁唑(PSPBO)具有优异的力学性能、耐热性能、绝缘性能、低吸水率、低介电常数及突出的光刻成型能力,被广泛应用于微电子、航空航天等重要领域。特别地,在集成电路半导体封装中,光敏... 详细信息

作为耐热光敏绝缘介质材料的典型代表之一,光敏聚苯并噁唑(PSPBO)具有优异的力学性能、耐热性能、绝缘性能、低吸水率、低介电常数及突出的光刻成型能力,被广泛应用于微电子、航空航天等重要领域。特别地,在集成电路半导体封装中,光敏聚苯并噁唑被广泛应用于层间介质材料、应力缓冲层及保护层等,是扇出型封装等先进制程的关键材料。另外,随着5G高频高速通信、柔性显示、OLED等领域的快速发展,产业界对该类材料提出了更高的要求,比如低温固化、高粘结强度、低介电常数、导热等。更为重要的是,我国尚未掌握该材料的核心技术。本文综述了光敏聚苯并噁唑的发展概况和最新的研究进展,包括正性光敏聚苯并噁唑、负性光敏聚苯并噁唑以及光敏聚苯并噁唑的应用发展,最后对其发展前景进行了展望,以期为我国光敏聚苯并噁唑等耐热光敏聚合物基础研究与产业应用提供参考。

关键词：耐热光敏聚合物光敏聚苯并噁唑低温固化介电半导体封装

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LED芯片键合材料研究述评

集成技术 2014年第6期3卷 1-7页

作者：张保坦孙蓉汪正平中国科学院深圳先进技术研究院深圳518055 香港中文大学香港999077

发光二极管(LED)是一类可直接将电能转化为可见光和热等辐射能的发光器件。随着亮度和功率的不断提高,芯片键合材料成为解决大功率LED散热问题的关键技术之一。针对LED对芯片键合材料的性能要求,文章综述了LED芯片键合材料的种类、特点... 详细信息

发光二极管(LED)是一类可直接将电能转化为可见光和热等辐射能的发光器件。随着亮度和功率的不断提高,芯片键合材料成为解决大功率LED散热问题的关键技术之一。针对LED对芯片键合材料的性能要求,文章综述了LED芯片键合材料的种类、特点及发展现状,并重点介绍了环氧和有机硅材料的应用技术进展。

关键词：键合材料环氧有机硅共晶材料