可控合成金纳米结构表面增强拉曼散射研究
首发时间:2017-05-04
摘要:本文提出一种基于表面增强拉曼散射光谱的超灵敏、廉价的生物分子检测方法,将电化学沉积与介电电泳相结合,通过控制交流电频率和电镀液浓度,可在电极对之间以及电极侧边沉积出不同形貌的金纳米结构。文章对交流电沉积制备金纳米结构的机理进行了分析,讨论了交流电频率以及电镀液浓度对纳米结构的影响。并比较了不同形貌金属纳米结构对拉曼信号的增强。其中利用纳米网状的金纳米结构实现了对罗丹明(R6G)分子的低浓度检测,其在检测极限为10-7M。
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SERS Detection Through Controllably Synthesised Gold Nanostructures
Abstract:This paper presents an ultrasensitive and inexpensive method for ricin detection by surface enhanced Raman scattering (SERS) on shape-controlled gold nanocrystals substrates fabricated by integrating electrodeposition with dielectrophoresis (DEP). The gold nanostructures could be deposited between an electrode pair and on the electrode sides through AC frequency regulation and electroplating solution. In this study, the influences of AC frequency as well as the concentration of the electroplating solution on nanostructures were discussed. Subsequently, the nanowet gold nanostructure was employed to detect Rhodamine 6G(R6G), and the limit of detection is 10-7M.
Keywords: electrochemical deposition gold nanowire SERS?????
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No.4729851119648314****
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