Nanometre-scale deposition of colloidal Au particles using electrophoresis in a nanopipette probe
Nanometre-scale deposition of colloidal Au particles using electrophoresis in a nanopipette probe
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DOI：
10.1088/0957-4484/18/10/105301
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发表时间：
2007-03-14
期刊：
影响因子：
3.5
通讯作者：
Sasaki, A.
中科院分区：
文献类型：
--
作者：
Iwata, F.;Nagami, S.;Sasaki, A.
我们描述了一种新的技术，局部电泳沉积的胶体粒子使用扫描探针显微镜与纳米移液管探针填充有胶体溶液。将包含纳米级颗粒的胶体溶液放入纳米移液管探针中。将细金属线插入纳米移液管探针中作为电泳沉积的电极。随着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，胶体颗粒向探针边缘迁移，导致它们沉积在表面上。这是可能的纳米尺度的Au胶体粒子在水溶液中被沉积在Si表面。Au点的尺寸可以通过调节沉积时间和电压来改变。在表面上成功地绘制出点阵和线型图案。这种局部沉积技术为纳米机器和纳米电子学等纳米结构的制造提供了可能。
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.