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首页> 外文期刊>Nanotechnology >Self-assembly of single thin Au nanoparticle chains on Si along V-groove-etched lines between micrometre-distant electrodes by dielectrophoresis
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Self-assembly of single thin Au nanoparticle chains on Si along V-groove-etched lines between micrometre-distant electrodes by dielectrophoresis

机译：硅单细金纳米颗粒链沿介电电泳法沿微米距离电极之间的V槽蚀刻线自组装

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摘要

In this study we investigated the self-assembly of 40 nm size Au colloidal nanoparticles with citrate stabilization on oxidized flat or V-groove-etched Si substrates between micrometre-distant electrodes using an ac electric field and the technique of dielectrophoresis. We demonstrated that pre-patterning of the Si surface by forming micrometre-wide V-groove lines perpendicular to the gold electrodes facilitates single nanoparticle chain formation along the V-groove-etched lines. Single thin (approx 100-200 nm thick) Au nanoparticle chains 1-10 mu m in length were thus formed on oxidized Si between integrated electrodes. The effect of the applied voltage and frequency of the electric field on nanoparticle chaining was investigated in detail. The selective growth along the V-grooves was interpreted by considering the electric field distribution between the electrodes. The samples were characterized by scanning electron microscopy and current-voltage measurements. The Au nanoparticle chains obtained were conductive and are interesting for applications in biomolecule sensing.
机译：在这项研究中，我们使用交流电场和介电电泳技术研究了具有柠檬酸盐稳定作用的40 nm尺寸的Au胶态纳米颗粒在柠檬酸稳定化或在V形沟槽蚀刻的Si基片之间的自组装，该微米级远距离电极之间。我们证明了通过形成垂直于金电极的微米级V形沟槽线对Si表面进行预构图，有助于沿着V形沟槽蚀刻线形成单个纳米颗粒链。因此，在集成电极之间的氧化硅上形成了一条长度为1-10微米的单细（约100-200 nm厚）的金纳米粒子链。详细研究了施加电压和电场频率对纳米粒子链的影响。通过考虑电极之间的电场分布来解释沿V型槽的选择性生长。通过扫描电子显微镜和电流-电压测量来表征样品。获得的金纳米颗粒链具有导电性，对于生物分子传感中的应用很有趣。

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