TITLE

Fabrication of nanometer-spaced electrodes using gold nanoparticles

AUTHOR(S)
Khondaker, Saiful I.; Yao, Zhen
PUB. DATE
December 2002
SOURCE
Applied Physics Letters;12/9/2002, Vol. 81 Issue 24, p4613
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
A simple and highly reproducible technique is demonstrated for the fabrication of metallic electrodes with nanometer separation. Commercially available bare gold colloidal nanoparticles are first trapped between prefabricated large-separation electrodes to form a low-resistance bridge by an ac electric field. A large dc voltage is then applied to break the bridge via electromigration at room temperature, which consistently produces gaps in the sub-10 nm range. The technique is readily applied to prefabricated electrodes with separation up to 1 µm, which can be defined using optical lithography. The simple fabrication scheme will facilitate electronic transport studies of individual nanostructures made by chemical synthesis. As an example, measurement of a thiol-coated gold nanoparticle showing a clear Coulomb staircase is presented.
ACCESSION #
8633260

 

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