共查询到20条相似文献,搜索用时 78 毫秒
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研制出一种基于介质上电润湿(electrowetting-on-d ielectric,EWOD)机制的可编程数字化微流控芯片。它采用“三明治”结构:受控离散液滴被夹在两极板之间;下极板以硅为衬底,掺杂多晶硅作为芯片微电极阵列,其上涂覆有Teflon(AF1600薄膜的S iO2作为疏水性介质层;上极板是涂覆有Teflon(AF1600疏水薄膜的透明电极。通过分析数字化微流控系统的基本操作(离散液滴的传输、拆分及混合)的物理机理和模拟优化,在35 V低驱动电压下实现了约0.35μL和0.45μL去离子水离散液滴的传输和合并,并在70 V驱动电压下实现了0.8μL液滴的拆分等操作。 相似文献
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微流控芯片技术在生命科学研究中的应用 总被引:4,自引:0,他引:4
微流控芯片最初起源于分析化学领域,是一种采用精细加工技术,在数平方厘米的基片,制作出微通道网络结构及其它功能单元,以实现集微量样品制备、进样、反应、分离及检测于一体的快速、高效、低耗的微型分析实验装置.随着微电子及微机械制作技术的不断进步,近年来微流控芯片技术发展迅猛,并开始在化学、生命科学及医学器件等领域发挥重要作用.本文首先简单介绍了微流控芯片制作材料和工艺,然后主要阐述了其在蛋白质分离、免疫分析、DNA分析和测序、细胞培养及检测等方面的应用进展. 相似文献
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微流控技术与芯片实验室 总被引:1,自引:0,他引:1
作为芯片实验室的典型代表性技术,微流控技术发展迅速,目前已经成为一门涵盖了从分离分析、分子生物学研究到生物医学诊断的交叉学科。本文主要归纳了微流控芯片技术的基本概念、发展概况、构建方法,以及在生物学应用领域的最新研究进展,特别介绍了在单细胞研究领域以及面向最终应用的生物医学诊断方面的典型技术。 相似文献
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外泌体是具有各种关键生物活性分子(如脂质、 蛋白质和核酸)的细胞外囊泡. 它们可以由所有类型的细胞分泌, 并分布在所有生物流体中, 如血液、 唾液、 汗水和尿液等. 更重要的是, 外泌体可以参与多种生理活动, 包括细胞间通讯、 哺乳动物的繁殖和免疫反应, 并在新陈代谢以及心血管疾病、 神经变性和癌症等疾病的病理进展中起重要作用, 这使其成为备受关注的天然非侵入性生物标记物, 并且被认为是可用于临床诊断和治疗的潜在工具。本文综述了用于检测外泌体的生物传感器的最新发展, 包括荧光、 电化学、 电化学发光、 表面增强拉曼光谱、 比色法和微流控技术等分析方法; 总结了在临床诊断和疾病治疗中外泌体的临床应用; 还讨论了外泌体检测所面临的挑战以及外泌体在临床诊断和疾病治疗等方面的应用潜力. 相似文献
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This article is a brief overview of the emerging microfluidic systems called surface‐tension‐confined microfluidic (STCM) devices. STCM devices utilize surface energy that can control the movement of fluid droplets. Unlike conventional poly(dimethylsiloxane)‐based microfluidics which confine the movement of fluids by three‐dimensional (3D) microchannels, STCM systems provide two‐dimensional (2D) platforms for microfluidics. A variety of STCM devices have been prepared by various micro‐/nanofabrication strategies. Advantages of STCM devices over conventional microfluidics are significant reduction of energy consumption during device operation, facile introduction of fluids onto 2D microchannels without the use of a micropump, increased flow rate in a special type of STCM device, among others. Thus, STCM devices can be excellent alternatives for certain areas in microfluidics. In this Minireview, fabrication methods, operating modes, and applications of STCM devices are introduced. 相似文献
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Molecular recognition plays an important role in biological and chemical processes. Since molecular imprinting techniques can afford complementary binding sites for a target molecule, the molecularly imprinted polymer (MIP) for the target molecule has been used for its specific recognition as chromatographic media, solid-phase ex- 相似文献
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Yi-Qiang FAN Hong-Liang WANG Ke-Xin GAO Jing-Ji LIU Dong-Ping CHAI Ya-Jun ZHANG 《分析化学》2018,46(12):1863-1871
Microfluidics has been widely used in the life science, analytical chemistry, environmental science and other fields in the recent years. Traditional microfluidics systems usually use a highly integrated system with multiple components for handling the fluid in the micro/nano scale. The design and fabrication of integrated microfluidics usually require highly sophisticated instruments and operation professionals. With the experience inherited from integrated circuit and micro electro mechanical system, the modular microfluidics system has been experienced a rapid development in recent years. Modular microfluidics system is a combination of a series of individual modules to achieve complicated liquid handling functions. Compared with conventional microfluidics approach, the modular microfluidics method has the potential in significantly reducing the fabrication cost by using the massive production of single chip, besides, it is easy to be operated, and the user can easily assembly the modules to obtain their customized microfluidics system. The concept of modular microfluidics also indicates the future development path for the standardization of microfluidics system and also provides a promising approach for the industrial massive production of microfluidics. However, the study of modular microfluidics is still in an early stage. Although lots of studies have been conducted with varies materials, fabrication methods and interface technologies, issues like modular interface still restricted the further development of microfluidics. In this paper, a comprehensive review for the latest research on the modular microfluidics and applications in biological and medical fields is provided, and the future research trends of modular microfluidics is also discussed. 相似文献
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微流控液滴技术及其应用的研究进展 总被引:1,自引:0,他引:1
微液滴具有体积小、比表面积大,速度快、通量高,大小均匀、体系封闭,内部稳定等特性,在药物控释、病毒检测、颗粒材料合成、催化剂等领域中均有重要应用.微流控技术的发展为微液滴生成中实现尺寸规格、结构形貌和功能特性等的可控设计和精确操控提供了全新平台.本文概述了微流控液滴技术的基本原理、液滴生成方式及其基本操控,比较分析了微液滴的传统制备法与微流控合成法的异同,介绍了近年来微流控液滴技术在功能材料合成、生物医学和食品加工等领域中的研究新进展,探讨并展望了微流控液滴技术的潜在价值和未来发展方向. 相似文献