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Title: Polymer-Protected Nanogap Device for Molecular Sensing in Aqueous Environment
Keywords: Nanogap, DNA, Polymer-protected, Aqueous solution, Nanoparticles
Issue Date: 31-May-2010
Citation: ZHANG HUIJUAN (2010-05-31). Polymer-Protected Nanogap Device for Molecular Sensing in Aqueous Environment. ScholarBank@NUS Repository.
Abstract: The main focus of the thesis is the development and study of techniques to fabricate nanogap devices that are protected by a polymer layer only leaving an opening at the vicinity of the nanogaps. The polymer-protected nanogap devices are aimed at sensing applications in an aqueous environment. The nanogap is fabricated by thermally assisted electromigration to simultaneously form self-aligned hole and nanogap structures in a bowtie electrode. The device is able to significantly reduce the ionic current through electrolytes of high salt concentrations. DNA detection by oligonucleotide-modified gold nanoparticle assembly and in situ conductance measurement in buffer solution are demonstrated.
Appears in Collections:Ph.D Theses (Open)

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