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Multigear Bubble Propulsion of Transient Micromotors

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Research 2020年第1期2020卷 1384-1392页

作者： Amir Nourhani Emil Karshalev Fernando Soto joseph wang Department of Nanoengineering University of California San DiegoLa JollaCA 92093USA Department of Mechanical Engineering Department of BiologyBiomimicry Research and Innovation CenterUniversity of AkronAkronOH 44325USA

Transient,chemically powered micromotors are promising biocompatible engines for *** propose a framework to investigate in detail the dynamics and the underlying mechanisms of bubble propulsion for transient chemically powered *** observations on the variations of the micromotor active material and geometry over its lifetime,from initial activation to the final inactive state,indicate different bubble growth and ejection mechanisms that occur stochastically,resulting in time-varying micromotor *** identify three processes of bubble growth and ejection,and in analogy with macroscopic multigear machines,we call each process a *** 1 refers to bubbles that grow on the micromotor surface before detachment while in Gear 2 bubbles hop out of the *** 3 is similar in nature to Gear 2,but the bubbles are too small to contribute to micromotor *** study the characteristics of these gears in terms of bubble size and ejection time,and how they contribute to micromotor *** ability to tailor the shell polarity and hence the bubble growth and ejection and the surrounding fluid flow is *** understanding of the complex multigear bubble propulsion of transient chemical micromotors should guide their future design principles and serve for fine tuning the performance of these micromotors.

关键词： bubble transient chemically

Wearable energy systems:what are the limits and limitations?

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National Science Review 2023年第1期 7-9页

作者：尹鹿 joseph wang Department of Nanoengineering Center for Wearable Sensors University of California San Diego

The recent decade marks a sharp rise in wearable electronics with a market size approaching 100 billion ***-side this boom in consumer wearable electronics,researchers have pursued,during the past 15 years,next-generation wearable electronics featuring thin,soft,conformal,flexible and stretchable form factors for application in advanced human-machine interaction and comprehensive sensing.

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用于监测环境中酪氨酸酶抑制剂的植物组织电极

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环境化学 2001年第4期20卷 398-404页

作者：刘杰 wang joseph 南通医学院化学教研室南通226001 New

根据二乙基二硫代氨基甲酸盐、硫脲或苯甲酸等环境污染物质对蘑菇富含的酪氨酸酶所产生的抑制作用,研制了将蘑菇固定在碳糊而成的植物组织电极,用来有效地监测上述酪氨酸酶抑制剂．当存在酶的底物儿茶酚时,在该蘑菇组织电极上通过批量... 详细信息

根据二乙基二硫代氨基甲酸盐、硫脲或苯甲酸等环境污染物质对蘑菇富含的酪氨酸酶所产生的抑制作用,研制了将蘑菇固定在碳糊而成的植物组织电极,用来有效地监测上述酪氨酸酶抑制剂．当存在酶的底物儿茶酚时,在该蘑菇组织电极上通过批量加入以及流动注射两种实验方式进行电流分析测定,结果表明这种生物传感器价廉、灵敏、快速、操作简易(无须温育)等,可用于现场环境监测另外,还对申极制作条件诸如蘑菇用量及蘑菇切片部位等因素对电极行为的影响进行了研究．

关键词：组织电极蘑茹碳糊抑制作用环境污染物环境监测电化学生物传感器

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用吸附溶出伏安法测定微量铑

有色矿冶 1992年第3期8卷 54-57页

作者： joseph wang ZIAD TAHA 许孙曲

介绍了用灵敏的溶出伏安法定量测定铑。铑与氯离子的配合物被吸附在吊挂的滴汞电极上,当负向扫描时,测得聚集配合物的还原电流。用循环伏安法来表征介面特征和氧化还原特性。论述了PH、氯化物浓度、累积电位和其它变量的影响。累积 5 mi... 详细信息

介绍了用灵敏的溶出伏安法定量测定铑。铑与氯离子的配合物被吸附在吊挂的滴汞电极上,当负向扫描时,测得聚集配合物的还原电流。用循环伏安法来表征介面特征和氧化还原特性。论述了PH、氯化物浓度、累积电位和其它变量的影响。累积 5 min的检测限为 1×10^(-8)M(～***/ml)。在7×10^(-7)M以内,观测到线性的电流-浓度关系,相对标准偏差(在2×10^(-7)M含量时)为3.0％。研究了共存金属的可能干扰。

关键词：铑溶出伏安法微量分析

Biocatalytic Buoyancy‑Driven Nanobots for Autonomous Cell Recognition and Enrichment

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Nano-Micro Letters 2023年第12期15卷 334-348页

作者： Ziyi Guo Chenchen Zhuang Yihang Song Joel Yong Yi Li Zhong Guo Biao Kong John MWhitelock joseph wang Kang Liang School of Chemical Engineering Australian Centre for NanoMedicineThe University of New South WalesSydneyNSW 2052Australia Medical College Northwest Minzu UniversityLanzhou 730000People’s Republic of China General Intensive Care Unit Second Affiliated Hospital of Zhejiang University School of MedicineHangzhouPeople’s Republic of China School/Hospital of Stomatology Lanzhou UniversityLanzhou 730000People’s Republic of China Department of Chemistry Shanghai Key Lab of Molecular Catalysis and Innovative MaterialsCollaborative Innovation Center of Chemistry for Energy MaterialsFudan UniversityShanghai 200438People’s Republic of China Graduate School of Biomedical Engineering The University of New South WalesSydneyNSW 2052Australia Department of Nanoengineering University of California San DiegoLa JollaCA 92093USA

Autonomously self-propelled nanoswimmers represent the nextgeneration nano-devices for bio-and environmental ***,current nanoswimmers generate limited energy output and can only move in short distances and duration,thus are struggling to be applied in practical challenges,such as living cell ***,we describe the construction of biodegradable metal-organic framework based nanobots with chemically driven buoyancy to achieve highly efficient,long-distance,directional vertical motion to“find-and-fetch”target *** surface-functionalized with antibodies against the cell surface marker carcinoembryonic antigen are exploited to impart the nanobots with specific cell targeting capacity to recognize and separate cancer *** demonstrate that the self-propelled motility of the nanobots can sufficiently transport the recognized cells autonomously,and the separated cells can be easily collected with a customized glass column,and finally regain their full metabolic potential after the *** utilization of nanobots with easy synthetic pathway shows considerable promise in cell recognition,separation,and enrichment.

关键词： Nanobots Surface functionalization Cell recognition Cell separation Metal-organic frameworks

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汗液供电

科技纵览 2020年第7期 34-39页

作者： Patrick Mercier joseph wang 不详

承认吧,你很喜欢你的智能手表和它的各种神奇功能。不过经常充电却很烦人。电池寿命更长当然很好,但是电池储存的能量多少与体积大小有关,电池越大,体积就越大,也会更重。健身跟踪器、入耳式音频增强耳戴设备和增强现实隐形眼镜等所有... 详细信息

承认吧,你很喜欢你的智能手表和它的各种神奇功能。不过经常充电却很烦人。电池寿命更长当然很好,但是电池储存的能量多少与体积大小有关,电池越大,体积就越大,也会更重。健身跟踪器、入耳式音频增强耳戴设备和增强现实隐形眼镜等所有可穿戴设备都有类似的供电问题。

关键词：电池寿命可穿戴设备增强现实智能手表跟踪器隐形眼镜供电问题充电

Recovery of rare and precious metals from urban mines —— A review

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Frontiers of Environmental Science & Engineering 2017年第5期11卷 3-19页

作者： Mengmeng wang Quanyin Tan joseph F. Chiang Jinhui Li Key Laboratory for Solid Waste Management and Environment Safety (Tsinghua University) Ministry of Education of China School of Environment Tsinghua University Beijing 100084 China Department of Chemistry and Biochemistry State University of New York College at Oneonta Oneonta NY 13820 USA

Urban mining is essential for continued natural resource extraction. The recovery of rare and precious metals （RPMs） from urban mines has attracted increasing attention from both academic and industrial sectors, because of the broad application and high price of RPMs, and their low content in natural ores. This study summarizes the distribution characteristics of various RPMs in urban mines, and the advantages and shortcomings of various technologies for RPM recovery from urban mines, including both conventional （pyrometallurgical, hydrometallurgical, and biometallurgical processing）, and emerging （electrochemical, supereritieal fluid, mechanochemical, and ionic liquids processing） technologies. Mechanical/physical technologies are commonly employed to separate RPMs from nonmetallic components in a pre-treatment process. A pyrometallurgical process is often used tbr RPM recovery, although the expensive equipment required has limited its use in small and medium-sized enterprises. Hydrometallurgical processing is effective and easy to operate, with high selectivity of target metals and high recovery efficiency of RPMs, compared to pyrometallurgy. Biometallurgy, though, has shown the most promise for leaching RPMs from urban mines, because of its low cost and environmental friendliness. Newly developed technologies electrochemical, supercritical fluid, ionic liquid, and mechanochemical have offered new choices and achieved some success in laboratory experiments, especially as efficient and environmentally friendly methods of recycling RPMs. With continuing advances in science and technology, more technologies will no doubt be developed in this field, and be able to contribute to the sustainability of RPM mining.

关键词： Rare and precious metals (RPMs) Distribution characteristics Recycling technology Emerging technology Supercritical fluid

Insight into atmospheric corrosion evolution of mild steel in a simulated coastal atmosphere

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Journal of Materials Science & Technology 2021年第17期76卷 41-50页

作者： Yue wang Xin Mu Junhua Dong Aniefiok joseph Umoh Wei Ke Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of Materials Science and Engineering University of Science and Technology of ChinaShenyang 110016China Environmental Corrosion Centre of Materials Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China

The corrosion behavior of mild steel in a simulated coastal atmosphere environment has been investigated by the indoor accelerated wet/dry cyclic corrosion acceleration test(CCT),scanning electron microscopy(SEM),Raman spectroscopy and electrochemical *** the CCT test of 60 cycles,the evolution of logarithmic(corrosion rate)***(CCT cycles)presents a turning point at the 5th cycle,presenting a tendency to increase first and then decrease to gradually stabilize as the CCT cycle *** the 5th cycle,γ-FeOOH andβ-FeOOH and Fe_(3)O_(4)were detected,*** then,α-FeOOH as a new chemical composition was detected in the subsequent corrosion *** is found that,after long term corrosion,the rust separated into a relatively dense inner layer rich withα-FeOOH and a loose outer layer rich withγ-FeOOH,both of which have poor electrical *** rapid increase of corrosion rate in the early stage since reducible corrosion products are involved in the reduction process of the cathode which promotes the dissolution of the anodic metal ***,as the rust layer thickens,the resistance of the rust increases,and the aggressive ions diffusion is blocked,gradually suppressing the electrochemical corrosion *** last,when the composition and distribution of the rust layer remain stable,the corrosion presents a fluctuating speed around a certain value during the cracking and self-repairing process of the rust layer.

关键词： Mild steel Coastal atmospheric corrosion Raman spectroscopy Rusting evolution EIS

Harnessing a multi-dimensional fibre laser using genetic wavefront shaping

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Light(Science & Applications) 2020年第1期9卷 593-602页

作者： Xiaoming Wei joseph C.Jing Yuecheng Shen Lihong V.wang Caltech Optical Imaging Laboratory Andrew and Peggy Cherng Department of Medical EngineeringDepartment of Electrical EngineeringCalifornia Institute of Technology1200 East California Boulevard MailCode 138-78Pasadena 91125 CAUSA School of Physics and Optoelectronics/State Key Laboratory of Luminescent Materials and Devices/Guangdong Engineering Technology Research and Development Center of Special Optical Fiber Materials and Devices/Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques South China University of Technology381 Wushan RoadGuangzhou 510640China School of Electronics and Information Technology Sun Yatsen UniversityGuangzhou 510006China

The multi-dimensional laser is a fascinating platform not only for the discovery and understanding of new higherdimensional coherent lightwaves but also for the frontier study of the complex three-dimensional(3D)nonlinear dynamics and solitary waves widely involved in physics,chemistry,biology and materials *** controlling coherent lightwave oscillation in multi-dimensional lasers,however,is challenging and has largely been unexplored;yet,it is crucial for both designing 3D coherent light fields and unveiling any underlying nonlinear ***,for the first time,we genetically harness a multi-dimensional fibre laser using intracavity wavefront shaping technology such that versatile lasing characteristics can be *** demonstrate that the output power,mode profile,optical spectrum and mode-locking operation can be genetically optimized by appropriately designing the objective function of the genetic *** is anticipated that this genetic and systematic intracavity control technology for multi-dimensional lasers will be an important step for obtaining high-performance 3D lasing and presents many possibilities for exploring multi-dimensional nonlinear dynamics and solitary waves that may enable new applications.

关键词： fibre dimensional coherent