Metallized DNA Nanotemplates for the Fabrication of ZnO Nanostructures for Optoelectronic Applications

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Abstract:

Deoxyribonucleic acid (DNA)-based nanostructures have drawn a major attention in nanotechnology. In this study, aligned metallized-DNA strands are used as templates to fabricate ZnO nanowires and other nanostructures via chemical vapor deposition (CVD). Metal nanoparticles with positive charge along with lambda-deoxyribonucleic acid (-DNA) strands are utilized in synthesizing the nanotemplates. First, -DNA strands are immobilized and aligned in parallel arrays over silicon substrate via meniscus motion by controlled evaporation. Then, positively charged gold nanoparticles are selectively bound along the -DNA strands by electrostatic adsorption. Modulation of the zinc vapor/oxygen gas concentration in the CVD system is achieved via a spatial variation of the sample location inside the reactor tube. Characterization by scanning electron microscopy (SEM), X-ray diffraction (XRD), Photoluminescence spectrometer (PL), and conductivity measurements reveal that ZnO nanostructures possessing different morphologies, optical and electrical properties are obtained at different locations. Our studies form a step towards realistic applications of metallized oligonucleotide nanowires, and provide additional knowledge to fabricate tailored ZnO nanostructures for specific optoelectronic device applications.

Keywords: CHEMICAL VAPOR DEPOSITION; LAMBDA DNA; NANOCRYSTAL; NANOTEMPLATE; ZNO

Document Type: Research Article

DOI: http://dx.doi.org/10.1166/jno.2006.204

Publication date: August 1, 2006

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  • Journal of Nanoelectronics and Optoelectronics (JNO) is an international and cross-disciplinary peer reviewed journal to consolidate emerging experimental and theoretical research activities in the areas of nanoscale electronic and optoelectronic materials and devices into a single and unique reference source. JNO aims to facilitate the dissemination of interdisciplinary research results in the inter-related and converging fields of nanoelectronics and optoelectronics.
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