Deterministic Deposition of Nanoparticles with Sub-10 nm Resolution

被引：13

作者：

Fringes, Stefan ^{[1
]}

Schwemmer, C. ^{[1
]}

Rawlings, Colin D. ^{[1
]}

Knoll, Armin W. ^{[1
]}

机构：

[1] IBM Res Zurich, Saumerstr 4, CH-8803 Ruschlikon, Switzerland

来源：

NANO LETTERS | 2019年 / 19卷 / 12期

基金：

瑞士国家科学基金会; 欧洲研究理事会;

关键词：

Nanofluidics; nanofabrication; nanowires; nanoparticle assembly; OBJECTS; NANOWIRES; DEVICES; GLASS;

D O I：

10.1021/acs.nanolett.9b03687

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Accurate deposition of nanoparticles at defined positions on a substrate is still a challenging task, because it requires simultaneously stable long-range transport and attraction to the target site and precise short-range orientation and deposition. Here we present a method based on geometry-induced energy landscapes in a nanofluidic slit for particle manipulation: Brownian motors or electro-osmotic flows are used for particle delivery to the target area. At the target site, electrostatic trapping localizes and orients the particles. Finally, reducing the gap distance of the slit leads sequentially to a focusing of the particle position and a jump into adhesive contact by several nanometers. For 60 nm gold spheres, we obtain a placement accuracy of 8 nm. The versatility of the method is demonstrated further by a stacked assembly of nanorods and the directed deposition of InAs nanowires.

引用

页码：8855 / 8861

页数：7

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