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Si-Based Anode Materials for Li-Ion Batteries:A Mini Review

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Nano-Micro Letters 2014年第4期6卷 347-358页

作者： Delong Ma Zhanyi Cao anming hu Institute of Laser Engineering Beijing University of Technology 100 Pingle Yuan Key Laboratory of Automobile Materials Ministry of Education and School of Materials Science and Engineering Jilin University Department of Mechanical Aerospace and Biomedical Engineering University of Tennessee

Si has been considered as one of the most attractive anode materials for Li-ion batteries(LIBs) because of its high gravimetric and volumetric capacity. Importantly, it is also abundant, cheap, and environmentally benign. In this review, we summarized the recent progress in developments of Si anode materials. First, the electrochemical reaction and failure are outlined, and then, we summarized various methods for improving the battery performance, including those of nanostructuring, alloying, forming hierarchic structures, and using suitable binders. We hope that this review can be of benefit to more intensive investigation of Si-based anode materials.

关键词： Li-ion batteries Anode Si High capacity Nanomaterials

Joining of Individual Silver Nanowires via Electrical Current

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Nano-Micro Letters 2014年第4期6卷 293-300页

作者： Arash Vafaei anming hu Irene A.Goldthorpe Department of Electrical and Computer Engineering University of Waterloo Department of Mechanical and Mechatronics Engineering University of Waterloo Department of Mechanical Aerospace and Biomedical Engineering University of Tennessee Knoxville

A procedure for joining polyol-synthesized silver nanowires in air using current-induced Joule heat welding is reported. Using a common probe station and photolithographically patterned gold electrodes, the welding process is completed using a common semiconductor analyzer. A unique two-step procedure eliminates the dielectric barrier at the point of contact without damaging the nanowires away from the junction. This procedure is designed for metal–metal contacts where a strong dielectric intermediate layer might exist, which can occur with metals prone to oxidation or corrosion in air, or as a result of the electrode deposition process. Ohmic connections are also established in cases where there is an initial gap between two nanowires.

关键词： Nanowires Nanowelding Joule heating

Ultra-Short Pulsed Laser Manufacturing and Surface Processing of Microdevices

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Engineering 2018年第6期4卷 779-786页

作者： Yongchao Yu Shi Bai Shutong Wang anming hu Department of Mechanical Aerospace and Biomedical EngineeringUniversity of TennesseeKnoxvilleTN 37996USA Institute of Laser Engineering Beijing University of TechnologyBeijing 100124China College of Electronics and Information Engineering Sichuan UniversityChengdu 610064China

Ultra-short laser pulses possess many advantages for materials *** laser has a significantly low thermal effect on the areas surrounding the focal point;therefore,it is a promising tool for micro-and submicro-sized precision *** addition,the nonlinear multiphoton absorption phenomenon of focused ultra-short pulses provides a promising method for the fabrication of various structures on transparent material,such as glass and transparent polymers.A laser direct writing process was applied in the fabrication of high-performance three-dimensional(3D)structured multilayer microsupercapacitors(MSCs)on polymer substrates exhibiting a peak specific capacitance of 42.6 mF·cm^-2 at a current density of 0.1 mA·cm^-***,a flexible smart sensor array on a polymer substrate was fabricated for multi-flavor *** surface treatments such as gold plating,reducedgraphene oxide(rGO)coating,and polyaniline(PANI)coating were accomplished for different measurement *** applying principal component analysis(PCA),this sensing system showed a promising result for flavor *** addition,two-dimensional(2D)periodic metal nanostructures inside 3D glass microfluidic channels were developed by all-femtosecond-laser processing for real-time surfaceenhanced Raman spectroscopy(SERS).The processing mechanisms included laser ablation,laser reduction,and laser-induced surface *** works demonstrate the attractive potential of ultra-short pulsed laser for surface precision manufacturing.

关键词： Ultra-short pulsed laser processing Microdevices Supercapacitor Electronic tongue Surface-enhanced Raman spectroscopy

Palladium Nanoparticles Loaded on Carbon Modified TiO_2 Nanobelts for Enhanced Methanol Electrooxidation

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Nano-Micro Letters 2013年第3期5卷 202-212页

作者： Robert Liang anming hu John Persic Y.Norman Zhou Centre for Advanced Materials Joining Department of Mechanical and Mechatronics Engineering University of Waterloo 200 University Waterloo Institute for Nanotechnology University of Waterloo 200 University Microbonds Inc.

Carbon modified TiO_2 nanobelts(TiO_2-C) were synthesized using a hydrothermal growth method,as a support material for palladium(Pd) nanoparticles(Pd/TiO_2-C) to improve the electrocatalytic performance for methanol electrooxidation by comparison to Pd nanoparticles on bare TiO_2 nanobelts(Pd/TiO_2)and activated carbon(Pd/AC). Cyclic voltammetry characterization was conducted with respect to saturated calomel electrode(SCE) in an alkaline methanol solution, and the results indicate that the specific activity of Pd/TiO_2-C is 2.2 times that of Pd/AC and 1.5 times that of Pd/TiO_2. Chronoamperometry results revealed that the TiO_2-C support was comparable in stability to activated carbon, but possesses an enhanced current density for methanol oxidation at a potential of -0.2 V vs. SCE. The current study demonstrates the potential of Pd nanoparticle loaded on hierarchical TiO_2-C nanobelts for electrocatalytic applications such as fuel cells and batteries.

关键词： Titanium oxide nanobelts Carbon-modification Fuel cell Methanol electrooxidation Palladium nanoparticles Electrocatalysts

Laser-Assisted Reduction of Highly Conductive Circuits Based on Copper Nitrate for Flexible Printed Sensors

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Nano-Micro Letters 2017年第4期9卷 49-61页

作者： Shi Bai Shigang Zhang Weiping Zhou Delong Ma Ying Ma Pooran Joshi anming hu Institute of Laser Engineering Beijing University of Technology School of Civil and Transportation Engineering Beijing University of Civil Engineering and Architecture Oak Ridge National Laboratory Department of Mechanical Aerospace and Biomedical Engineering University of Tennessee Knoxville

Stretchable electronic sensing devices are defining the path toward wearable electronics. High-performance flexible strain sensors attached on clothing or human skin are required for potential applications in the entertainment,health monitoring, and medical care sectors. In this work,conducting copper electrodes were fabricated onpolydimethylsiloxane as sensitive stretchable microsensors by integrating laser direct writing and transfer printing approaches. The copper electrode was reduced from copper salt using laser writing rather than the general approach of printing with pre-synthesized copper or copper oxide nanoparticles. An electrical resistivity of 96 l X cm was achieved on 40-lm-thick Cu electrodes on flexible substrates. The motion sensing functionality successfully demonstrated a high sensitivity and mechanical *** in situ fabrication method leads to a path toward electronic devices on flexible substrates.

关键词： Laser direct writing Copper circuit Stretchable sensor Laser reduction

New Insight into Microvascular Perfusion by Analyzing Pipe Flow in a Cylindrical Elastic Shell

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Journal of Biomedical Science and Engineering 2018年第9期11卷 247-253页

作者： Yanchun hu anming hu Shenju Song Yanxia hu Department of Orthopaedics The Fifth People’s Hospital Jinan China Shandong Experimental High School Jinan China Department of Nursing The Fifth People’s Hospital Jinan China Department of Infectious Diseases Center for Disease Control and Prevention Jinan China

Background: Microvascular perfusion, a kind of regional perfusion, plays important roles in delivering oxygen and nutrients, and regulating blood pressure and responses to inflammation. Aim: The aim of this research is to analyze the characteristics of microvascular perfusion by conducting pipe flow in a circular elastic tube. Methods: A model was established with circular elastic tube to mimic microvascular perfusion. The velocity of pressure waves was calculated according to the time that the liquid took to spilt over. What’s more, the characteristics and significance of microvascular flow and arteriovenous anastomoses (AVAs) were analyzed. Results: It took the liquid about 0.1 second to spill over from the model, and the velocity of pressure waves is greater than 100 m/s in the elastic pipe. A mechanical switch structure and the corresponding mechanism were proposed for microvascular perfusion in AVAs. Conclusion: Microvascular perfusion maintains a considerable constancy of hemodynamics in different tissues, when ventricular contraction changes perfusion pressure to meet metabolic demands appropriately. This theory will help us to gain a new perspective in microvascular flow.

关键词： Microvascular Perfusion Hypertension Cylindrical Elastic Shell Fluid Flow

A Novel Thermal Controlled Optical Attenuator

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材料科学与工程（中英文版） 2010年第7期4卷 12-17页

作者： Pengqin Wu Tong Zhang anming hu Xiaojun Xue Xiaoyang Zhang Qiuyue Chen School of Electronic Science and Engineering Southeast University and Key Laboratory of Micro-lnertial Instrument and Advanced Navigation Technology Ministry of Education Nanjing 210096 China Department of Mechanical and Mechatronics Engineering University of Waterloo Waterloo N2L 3G1 Canada

基于分布式并行分层极限学习机的大数据多模式质量预测

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计算机应用与软件 2022年第4期39卷 88-94,132页

作者：胡安明广州理工学院广东广州510540

考虑分布式系统质量预测中的大数据处理问题,提出一种基于分布式并行分层极限学习机(distributed parallel hierarchical extreme learning machine, dp-HELM)的大数据多模式质量预测模型。根据Map-Reduce框架,将高效的极限学习机算法... 详细信息

考虑分布式系统质量预测中的大数据处理问题,提出一种基于分布式并行分层极限学习机(distributed parallel hierarchical extreme learning machine, dp-HELM)的大数据多模式质量预测模型。根据Map-Reduce框架,将高效的极限学习机算法转化为分布式并行建模形式。由于分层极限学习机(hierarchical extreme learning machine, HELM)的深度学习网络结构在特征上具备的预测精度优势,结合深层隐藏层的ELM自动编码器,进一步开发了dp-HELM。通过dp-ELM和dp-HELM以同步并行方式进一步训练分布式并行K均值划分的过程模式,利用贝叶斯模型融合技术来集成用于在线预测的局部模型。将所提出的预测模型应用于预脱碳装置中残留的二氧化碳含量估算,实验结果表明了该方法的有效性与可行性。

关键词：分布式系统并行学习分层极限学习机大数据质量预测

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污水中药物和个人护理用品的光降解

北京工业大学学报 2016年第1期42卷 60-67页

作者：马颖胡安明北京工业大学激光工程研究院北京100124 美国田纳西大学机械航空生物工程系诺克斯维尔tn37996

药品和个人护理用品(pharmaceuticals and personal care products,PPCPs)作为新兴的环境污染物逐渐引起了广泛关注,不仅因为其在地表水中难以检测,更因为即便是极低的含量,也会对与其接触的生物产生生理毒性效应.尽管其在环境中的质量... 详细信息

药品和个人护理用品(pharmaceuticals and personal care products,PPCPs)作为新兴的环境污染物逐渐引起了广泛关注,不仅因为其在地表水中难以检测,更因为即便是极低的含量,也会对与其接触的生物产生生理毒性效应.尽管其在环境中的质量浓度仅有μg/L到ng/L,但对水生生物表现出一定的内分泌干扰,对人类健康有潜在的威胁.因此,低成本去除废水中的PPCPs吸引了研究人员的关注.关于PPCPs在污水中的迁移转化已有大量研究,从传统的污水处理到新型的处理过程,从实验室到实地监测.本文综述了多种光致氧化工艺去除PPCPs的优缺点,包括光催化、直接光解、臭氧化、光电催化等.阐明PPCPs的迁移转化及其影响并限制其对生态环境的污染,是保护未来生态环境和人类健康的关键.

关键词：药品和个人护理用品去除光降解水处理