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.
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.