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Nanometre-scale deposition of colloidal Au particles using electrophoresis in a nanopipette probe

机译:在纳米吸管探针中使用电泳法纳米级沉积胶体金颗粒

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摘要

We describe a novel technique of local electrophoretic deposition of colloidal particles using a scanning probe microscope with a nanopipette probe filled with a colloidal solution. The colloidal solution including nanometre-scale particles was put into the nanopipette probe. A thin metal wire was inserted into the nanopipette probe as an electrode for the electrophoretic deposition. With the probe edge nearly in contact with the conductive surface and with an electric potential applied between the electrode and the surface, the colloidal particles migrated toward the edge of the probe, causing them to be deposited on the surface. It was possible for nanometre-scale Au colloidal particles in an aqueous solution to be deposited on Si surfaces. The size of the Au dots could be modified by adjusting the deposition time and voltage. Dot array and line patterns were successfully plotted on the surface. This technique of local deposition should provide the possibility for fabricating nanostructures such as nanomachines and nanoelectronics.
机译:我们描述了一种新型技术,利用扫描探针显微镜用充满胶体溶液的纳米吸管探针对胶体颗粒进行局部电泳沉积。将包含纳米级颗粒的胶体溶液放入纳米吸管探针中。将细金属线插入纳米吸管探针中,作为电泳沉积的电极。在探针边缘几乎与导电表面接触并且在电极和表面之间施加电势的情况下,胶体颗粒向探针边缘迁移,从而使它们沉积在表面上。水溶液中的纳米级Au胶体颗粒可能沉积在Si表面上。可以通过调节沉积时间和电压来修改金点的尺寸。点阵列和线条图案已成功绘制在表面上。这种局部沉积技术应提供制造纳米结构的可能性,例如纳米机器和纳米电子学。

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