Nami Jishu yu Jingmi Gongcheng/Nanotechnology and Precision Engineering最新文献_第8页

On-site low-power sensing nodes for distributed monitoring of heavy metal ions in water 用于分布式监测水中重金属离子的现场低功率传感节点

IF 3.7 3区工程技术

Nami Jishu yu Jingmi Gongcheng/Nanotechnology and Precision Engineering Pub Date : 2021-02-24 DOI: 10.1063/10.0003511

Menglun Zhang, Xi Zhang, Pengfei Niu, Tao Shen, Yi Yuan, Yuantao Bai, Zhilin Wang

{"title":"On-site low-power sensing nodes for distributed monitoring of heavy metal ions in water","authors":"Menglun Zhang, Xi Zhang, Pengfei Niu, Tao Shen, Yi Yuan, Yuantao Bai, Zhilin Wang","doi":"10.1063/10.0003511","DOIUrl":"https://doi.org/10.1063/10.0003511","url":null,"abstract":"Heavy metal pollution in water environments poses a great threat to public health and to the ecological environment due to its high toxicity and non-degradability. However, many existing detection methods require laboratory-based bulky instruments and time-consuming manual operations. Although some on-site systems exist, they are difficult to deploy on a large scale owing to their large size and high cost. Here, we report a sensing node featuring low power consumption and low cost, achieved by integrating microsensor, microfluidic, and electronic modules into a compact size for automatic and scalable heavy metal pollution monitoring. Digital microfluidic and electrochemical sensing modules are integrated on a chip, thereby combining the procedures of sample pretreatment, electrochemical sensing, and waste removal for automatic and continuous monitoring. The feasibility of the platform is demonstrated by Pb2+ detection in tap water. With a 3500 mA·h battery, the compact sensing node could work for several years in principle. There is scope for further improvements to the system in terms of wider functionality and reductions in size, power consumption, and cost. The sensing node presented here is a strong candidate for distributed monitoring of water quality as an Internet-of-Things application.","PeriodicalId":35428,"journal":{"name":"Nami Jishu yu Jingmi Gongcheng/Nanotechnology and Precision Engineering","volume":null,"pages":null},"PeriodicalIF":3.7,"publicationDate":"2021-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1063/10.0003511","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45446033","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

Design of a hexagonal air-coupled capacitive micromachined ultrasonic transducer for air parametric array 用于空气参数阵列的六角形空气耦合电容式微机械超声换能器的设计

IF 3.7 3区工程技术

Nami Jishu yu Jingmi Gongcheng/Nanotechnology and Precision Engineering Pub Date : 2021-02-22 DOI: 10.1063/10.0003504

Xiaoli Zhang, Hui Zhang, Dachao Li

{"title":"Design of a hexagonal air-coupled capacitive micromachined ultrasonic transducer for air parametric array","authors":"Xiaoli Zhang, Hui Zhang, Dachao Li","doi":"10.1063/10.0003504","DOIUrl":"https://doi.org/10.1063/10.0003504","url":null,"abstract":"An air parametric array can generate a highly directional beam of audible sound in air, which has a wide range of applications in targeted audio delivery. Capacitive micromachined ultrasonic transducer (CMUTs) have great potential for air-coupled applications, mainly because of their low acoustic impedance. In this study, an air-coupled CMUT array is designed as an air parametric array. A hexagonal array is proposed to improve the directivity of the sound generated. A finite element model of the CMUT is established in COMSOL software to facilitate the choice of appropriate structural parameters of the CMUT cell. The CMUT array is then fabricated by a wafer bonding process with high consistency. The performances of the CMUT are tested to verify the accuracy of the finite element analysis. By optimizing the component parameters of the bias-T circuit used for driving the CMUT, DC and AC voltages can be effectively applied to the top and bottom electrodes of the CMUT to provide efficient ultrasound transmission. Finally, the prepared hexagonal array is successfully used to conduct preliminary experiments on its application as an air parametric array.","PeriodicalId":35428,"journal":{"name":"Nami Jishu yu Jingmi Gongcheng/Nanotechnology and Precision Engineering","volume":null,"pages":null},"PeriodicalIF":3.7,"publicationDate":"2021-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1063/10.0003504","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42136063","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

A combined virtual impactor and field-effect transistor microsystem for particulate matter separation and detection 用于颗粒物质分离和检测的虚拟冲击器和场效应晶体管组合微系统

IF 3.7 3区工程技术

Nami Jishu yu Jingmi Gongcheng/Nanotechnology and Precision Engineering Pub Date : 2021-02-12 DOI: 10.1063/10.0003447

Yanna Li, Muqing Fu, W. Pang, Ye Chang, X. Duan

{"title":"A combined virtual impactor and field-effect transistor microsystem for particulate matter separation and detection","authors":"Yanna Li, Muqing Fu, W. Pang, Ye Chang, X. Duan","doi":"10.1063/10.0003447","DOIUrl":"https://doi.org/10.1063/10.0003447","url":null,"abstract":"Ambient suspended particulate matter (PM) (primarily with particle diameter 2.5 µm or less, i.e., PM2.5) can adversely affect ecosystems and human health. Currently, optical particle sensors based on light scattering dominate the portable PM sensing market. However, the light scattering method has poor adaptability to different-sized PM and adverse environmental conditions. Here, we design and develop a portable PM sensing microsystem that consists of a micromachined virtual impactor (VI) for particle separation, a thermophoretic deposition chip for particle collection, and an extended-gate field-effect transistor (FET) for particle analysis. This system can realize on-site separation, collection, and analysis of aerosol particles without being influenced by environmental factors. In this study, the design of the VI is thoroughly analyzed by numerical simulation, and mixtures of different-sized silicon dioxide (SiO2) particles are used in an experimental verification of the performance of the VI and FET. Considering the low cost and compact design of the whole system, the proposed PM analysis microsystem has potential for PM detection under a wide range of conditions, such as heavily polluted industrial environments and for point-of-need outdoor and indoor air quality monitoring.","PeriodicalId":35428,"journal":{"name":"Nami Jishu yu Jingmi Gongcheng/Nanotechnology and Precision Engineering","volume":null,"pages":null},"PeriodicalIF":3.7,"publicationDate":"2021-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1063/10.0003447","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43400065","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Deep-learning-based nanowire detection in AFM images for automated nanomanipulation 用于自动纳米操作的AFM图像中基于深度学习的纳米线检测

IF 3.7 3区工程技术

Nami Jishu yu Jingmi Gongcheng/Nanotechnology and Precision Engineering Pub Date : 2021-01-29 DOI: 10.1063/10.0003218

Huitian Bai, Sen Wu

引用次数: 12

A twist sensor based on polarization-maintaining fibers with different cladding diameters 基于不同包层直径保偏光纤的扭转传感器

IF 3.7 3区工程技术

Nami Jishu yu Jingmi Gongcheng/Nanotechnology and Precision Engineering Pub Date : 2021-01-25 DOI: 10.1063/10.0003338

Xiaoqi Liu, Yan-ge Liu, Zhi Wang

引用次数: 1

Propagation characteristics of photonic crystal fibers selectively filled with ionic liquid 离子液体选择性填充光子晶体光纤的传输特性

IF 3.7 3区工程技术

Nami Jishu yu Jingmi Gongcheng/Nanotechnology and Precision Engineering Pub Date : 2021-01-12 DOI: 10.1063/10.0002950

Xiaoqi Liu, Yan-ge Liu, Zhi Wang

引用次数: 0

Microfluidic high-throughput single-cell mechanotyping: Devices and applications 微流体高通量单细胞机械分型:设备和应用

IF 3.7 3区工程技术

Nami Jishu yu Jingmi Gongcheng/Nanotechnology and Precision Engineering Pub Date : 1900-01-01 DOI: 10.1063/10.0006042

G. Choi, Zifan Tang, W. Guan

引用次数: 7