Title

Dielectrophoretic Assembly of Single Gold Nanoparticle into Nanogap Electrodes

Authors

Authors

S. H. Yoon; S. Kumar; G. H. Kim; Y. S. Choi; T. W. Kim;S. I. Khondaker

Comments

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Abbreviated Journal Title

J. Nanosci. Nanotechnol.

Keywords

Dielectrophoresis; Gold Nanoparticles; Nanogap Electrodes; Self Assembly; SUSPENSIONS; FABRICATION; PARTICLES; TRANSPORT; FIELDS; WIRES; Chemistry, Multidisciplinary; Nanoscience & Nanotechnology; Materials; Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter

Abstract

We report the optimization study of assembling single 20 nm gold nano-particle in 20 nm spaced electrode gap via ac dielectrophoresis (DEP) technique. It was observed that time, voltage, and frequency variations influenced significantly the assembly of gold nano-particle in the nano-gap electrodes. Frequency variation study revealed that at lower frequencies (<1 MHz) the assembling was observed in low field regions; however, at a moderate frequency of 1 MHz, minimum number of nano-particles was assembled in high field region. Trapping of single 20 nm nano-particle in 20 nm spaced electrodes was successfully achieved under the optimized DEP parameters i.e., frequency, applied voltage and time of values corresponding to 1 MHz, 2 V, and 1 sec, respectively, with the yield of almost 66%. Our results show the promise of optimized dielectrophoresis in the future nano-engineering.

Journal Title

Journal of Nanoscience and Nanotechnology

Volume

8

Issue/Number

7

Publication Date

1-1-2008

Document Type

Article

Language

English

First Page

3427

Last Page

3433

WOS Identifier

WOS:000260776600018

ISSN

1533-4880

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