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表面镀金微球电动旋转操控

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摘要 表面为良导体微球的电动旋转研究是一项对无标记生物传感器开发等领域具有重要意义的新技术,未见相关报道.采用化学镀金方法,分别在直径为15和25μm的聚苯乙烯微球表面包裹一层厚度约50 nm的金膜,并将此表面镀金微球作为研究对象,进行电动旋转实验研究.实验结果表明,低频段(100 Hz^100 kHz)表面镀金聚苯乙烯微球作与电场反向的电动旋转运动,且相同条件下,对应最大旋转速度高于表面未修饰聚苯乙烯微球.以行波交流电渗及诱导电渗理论为基础,对表面镀金聚苯乙烯微球的电动旋转现象进行定性分析,并通过纳米荧光粒子实验表征镀金微球周围的流体流动现象,验证了定性分析的合理性.推导了行波交流电渗导致的表面镀金聚苯乙烯微球的电动旋转速度公式,并与实验结果进行对比分析,二者具有较好的一致性.
出处 《中国科学:技术科学》 EI CSCD 北大核心 2011年第3期318-325,共8页 Scientia Sinica(Technologica)
基金 国家自然科学基金(批准号:51075087) 浙江大学流体转动及控制国家重点实验室基金(批准号:GZKF-201004) 国家留学基金(批准号:2009612129) 教育部新世纪优秀人才计划(批准号:NCET-09-0054)资助项目
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参考文献33

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