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Exploiting oleic acid to prepare two-dimensional assembly of Si@graphitic carbon yolk-shell nanoparticles for lithium-ion battery anodes

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Nano Research 2019年第3期12卷 631-636页

作者： Xiao chen chen chen Yu Zhang Xianfeng Zhang Dong Yang Angang Dong State Key Laboratory of Molecular Engineering of Polymer and Department of Macromolecular Science Fudan University Shanghai 200433 China Chem Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials and Department of Chemistry Fudan University Shanghai 200433 China

Carbon coati ng has bee n a routi ne strategy for improvi ng the performa nee of Si-based anode materials for lithium-ion batteries. The ability to tailor the thick ness, homoge neity and graph itizati on degree of carb on-coati ng layers is esse ntial for addressi ng issues that hamper the real applicatio ns of Si anodes. Herein, we report the con structio n of two-dime nsional (2D) assemblies of intercon nected Si @ graphitic carb on yolk-shell nano particles (2D-Si@gC) from commercial Si powders by exploiting oleic acid (OA). The OA molecules act as both the surface-coati ng liga nds for facilitating 2D nano particle assembly and the precursor for forming uniform and conformal graphitic shells as thin as 4 nm. The as-prepared 2D-Si@gC with rationally designed void space exhibits excellent rate capability and cycling stability when used as anode materials for lithium-ion batteries, delivering a capacity of 1,150 mAh·g^-1 at an ultrahigh current density of 10 A·g^-1 and maintaining a stabilized capacity of 1,275 mAh·g^-1 after 200 cycles at 4 A·g^-1 The formatio n of yolk-shell nano particles 8nfines the depositi on of solid electrolyte in terphase (SEI) onto the outer carb on shell, while simulta neously providing sufficie nt space for volumetric expa nsion of Si nano particles. These attributes effectively mitigate the thickness variations of the entire electrode during repeated lithiation and delithiation, which combined with the unique 2D architecture and interc onn ected graphitic carbon shells of 2D-Si@gC contributes to its superior rate capability and cycling performa nee.

关键词： oleic acid self-assembly graphitic carbon yolk-shell nanoparticles Sianodes

Complex microstructure fabrication by integrating silicon anisotropic etching and UV-liga technology

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High Technology Letters 2007年第4期13卷 369-372页

作者：靖向萌 chen Di Huang Chuang chen Xiang Liu Jingquan Zhu Jun National Key Laboratory of Micro/Nano Fabrication Technology. Key Laboratory for Thin Films and Microtechnology of Ministry of Education Research Institute of Micro/Nano Science and Technology Shanghai Jiaotong University Shanghai 200030 P.R. China

A fabrication method which integrates silicon anisotropic etching micromachining with UV-liga technology to make complex microstmetures is presented. This proposed combined process enables the fabrication of high-aspect-ratio and three-dimensional （3D） microstructures, which cannot be fabricated by silicon bulk mieromachining or UV-liga alone. To demonstrate this combined method, the 100μm thick SU-8 micro gears were fabricated on the silicon convex square structure, which is 100μm × 100μm× 80μm in dimension. In the subsequent micro hot embossing process, a novel type of plastics polyethylene terephtalate glycol （PETg） was tried for use. Through optimizing process parameters, PETg shows the potential of being used as plastic replica in micro-electro-mechanical system （MEMS）. This fabrication technology provides a new option for the increasing need of functionality, quality and economy of MEMS.

关键词： UV-liga bulk silicon micro machining 3D microfabrication polyethylene terephtalate glycol (PETg)

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内蒙古新闻中电话连线的后期制作

内蒙古广播与电视技术 2009年第4期26卷 21-23页

作者：通力嘎沈利俊陈维凯内蒙古电视台制作部内蒙古呼和浩特市010058

日趋完善的多媒体技术正以它强大的编辑功能为电视制作展现了无限的应用前景,但传统设备的成熟技术、简单快捷的制作特性依然使它在新闻制作领域占一席之地。本文通过对新闻节目中"电话连线"在传统设备和多媒体上的制作来说明两种制作... 详细信息

日趋完善的多媒体技术正以它强大的编辑功能为电视制作展现了无限的应用前景,但传统设备的成熟技术、简单快捷的制作特性依然使它在新闻制作领域占一席之地。本文通过对新闻节目中"电话连线"在传统设备和多媒体上的制作来说明两种制作手段在电视新闻节目制作中相辅相成的特性。

关键词：电话连线传统设备多媒体

Ferriporphyrin-inspired MOFs as an artificial metalloenzyme for highly sensitive detection of H2O2 and glucose

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Chinese Chemical Letters 2020年第6期31卷 1398-1401页

作者： Jiajia chen Huajian gao Zhihao Li Yingxue Li Quan Yuan Key Laboratory of Analytical Chemistry for Biology and Medicine(Ministry of Education) College of Chemistry and Molecular SciencesWuhan UniversityWuhan 430072China

Metalloenzymes which employ metal species and organic ligands as central active sites play significant roles in various biological *** of artificial metalloenzymes can help to understand the related physiological mechanism and promote the applications of metalloenzymes in biosynthesis,energy conversion and *** this work,inspired by the active sites of ferriporphyrin-based metalloenzymes,Fe-MOFs by using ferric as the metal center and a porphyrin analog as the organic liga nd were developed as an artificial *** Fe-MOFs exhibit high peroxidase-like catalytic activity with excellent long-term ***,highly sensitive biosensors were built to detect H2 O2 and glucose based on the *** MOFs-based artificial metalloenzyme offers an efficient strategy for the development of highly stable and efficient metalloenzymes,showing great potential in catalysis,energy transfer,biosensing and medical diagnosis.

关键词： Metalloenzyme Metal-organic frameworks Peroxidase Catalyze Stability

Fabrication of solenoid-type microinductor with different magnetic core schemes by MEMS technique

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High Technology Letters 2006年第3期12卷 260-262页

作者：高孝裕 Zhou Yong chen Ji＇ an Lei Chong Zhao Xiaolin National Key Laboratory of Nano/Micro Fabrcation Teclmology Key Laboratory for Thin Film and Microfabrication of Ministry of Education Institute of Micro and Nano Science and Teehnology Shanghai Jiaotong University Shanghai 200030 P.R. China

Two micromachined solenoid-type inductors with different electroplated core structures, ellipse and rectangle, were fabricated, tested and compared in order to reach optimum designs for integrated induetoes and transformers. In the process of fabrication, UV-liga, dry. etching technique, fine polishing and eleetroplating techniques have been adopted to achieve high performance mieminduetor. Experimental results show that both types of the induetors are characterized by high inductance, Q-factor and low electrical resistance. While the inductance of the inductor with rectangular magnetic core is slightly higher than that with elliptical magnetic core, the quality factor of the latter is larger than that of the former.

关键词： microelectromechanical system (MEMS) inductance quality factor (Q-factor) microinductor magnetic core

几个藜麦品种在凉山州的产量稳定性及适应性分析

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西昌学院学报（自然科学版） 2020年第1期34卷 1-4页

作者：华劲松阿力里呷戴红燕陈理权周锡勇西昌学院四川西昌615000 普格县农业农村局四川普格615300 会理县农业农村局四川会理615100 冕宁县农业农村局四川冕宁615600

以凉山州藜麦品种多点试验数据为基础,采用Finlay和Wilkinson模型及品种与地区互作效应估算,分析了Blanca(v1)、Black pixankalla(v2)、Pasankalla(v3)、西选17-8(v4),陇藜1号(v5)、陇藜2号(v6)、陇藜3号(v7)、青藜1号(v8)等8个藜麦品种的在凉山州的丰产稳定性和适应性。结果表明,不同品种在不同地区的产量表现存在着极显著差异,v4为高产较稳定型品种,在不同的试验场点均表现出较好的丰产性,具有较好适应性,v1、v5为高产不稳定型品种,在适宜的地区产量表现较好,具有特殊的适应性,v8、v2、v6为较高产稳定型品种,产量尚可,但具有较广泛的适应性;v7、v3为低产稳定型品种,不适宜该地区种植。

关键词：藜麦多点试验稳定性适应性凉山州

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MEMS平面微弹簧刚度分析

压电与声光 2007年第2期29卷 237-239页

作者：李华石庚辰北京理工大学机电工程学院北京100081

对一种UV-liga工艺制备的封闭环“B型”微机电系统(MEMS)平面微弹簧建立了力学分析模型,运用能量法的卡氏第二定理,推导出了其在线性范围内的弹性常数计算公式。运用类似方法,推导出了开口“S型”MEMS平面微弹簧在线性范围内的弹性常数... 详细信息

对一种UV-liga工艺制备的封闭环“B型”微机电系统(MEMS)平面微弹簧建立了力学分析模型,运用能量法的卡氏第二定理,推导出了其在线性范围内的弹性常数计算公式。运用类似方法,推导出了开口“S型”MEMS平面微弹簧在线性范围内的弹性常数计算公式。在相同尺寸和材料特性条件下,对这两种平面微弹簧的刚度进行了对比研究,结果表明,闭环结构比开口结构的微弹簧刚度大。从力学的角度分析了其原因。对这两种平面微弹簧进行了力学拉伸实验,实验结果与公式计算结果相吻合。

关键词： MEMS 平面微弹簧卡氏第二定理弹性常数

Chromate separation by selective crystallization

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Chinese Chemical Letters 2020年第7期31卷 1974-1977页

作者： Xijian chen Xing Dai Rongzhen Xie Jie Li Afshin Khayambashi Lei Xu Chuang Yang Nannan Shen Yaxing Wang Linwei He Yugang Zhang chengliang Xiao Zhifang Chai Shuao Wanga State Key Laboratory of Radiation Medicine and Protection School of Radiation Medicine and ProtectionCollaborative Innovation Center of Radiological Medicine of Jiangsu Higher Education InstitutionsSoochow UniversitySuzhou 215123China College of Chemical and Biological Engineering Zhejiang UniversityHangzhou 310027China

A new paradigm to remove toxic chromate anions from aqueous solution by crystallization of chromatewater clusters with imine-linked guanidinium cationic ligands is *** guanidium-based cationic ligand was easily prepared through the imine condensation of an alde hyde and aminoguanidine *** cationic imine-linked guanidinium liga nd(BBIg-CI)showed a high re moval capacity(292.5 mg/g)in the *** decontamination of chromate anions from the wastewater by this cationic ligand was resulted from an instantaneous *** produced guanidium chromate salts have an extremely low solubility(Ksp,BBIg=8.19×10^9).Such superior removal performance of these mate rials was attributed to the cha rge-assisted hydrogen bonding between the cationic ligand and chromate-water hydrate anions,which was revealed by the single-crystal X-ray diffraction analysis and density functional theory(DFT)*** addition,the succes s ful recove ry of the guanidium-based ligand makes it more attractive for real-world applications.

关键词： Chromate Crystallization Hydrogen bonding Chromate-water clusters guanidinium ligand

UV-liga技术在多层微结构制备中的工艺研究

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压电与声光 2009年第5期31卷 706-708页

作者：朱军汪红陈翔陈迪刘景全上海交通大学微纳科学技术研究院上海200030

UV-liga技术在制备多层复杂微结构时存在如何确保多层套刻对准精度,尺寸控制精度及层间良好结合的问题。该文对这些问题进行了分析与实验研究,实验证明,弱曝光是产生层间位移,影响套刻精度的原因之一,减少曝光所产生的应力应以不发生位... 详细信息

UV-liga技术在制备多层复杂微结构时存在如何确保多层套刻对准精度,尺寸控制精度及层间良好结合的问题。该文对这些问题进行了分析与实验研究,实验证明,弱曝光是产生层间位移,影响套刻精度的原因之一,减少曝光所产生的应力应以不发生位移为前提;降低升降温速率能有效降低应力,提高层间结合性能,从而减少图形位移,确保套刻对准的精度。

关键词： UV—liga 多层套刻精度曝光中烘