JIITA, vol. 2, no. 4, pp.183-186, Dec, 2018
Fabrication and Characterization of DNATemplated Gold Nanowires for the Application to Nanodevices
Hyung Jin Kim 1,*)
1) Convergence Medical Device Research Center, Gumi Electronics and Information Technology Research Institute, Gumi, Korea
Abstract: We investigated an efficient method for large-scale alignment of DNA molecules and thus DNA templated gold nanowires (AuNWs) on 3aminopropyltriethoxysilane (APS) coated Si wafer. It was confirmed that virtually all the DNA molecules were aligned in long-range order (from 16 to 20 μm) over large areas (from 30 to 40 μm) along one direction, which was the same as the flow direction created by tilting. Surface tension and flow rate (tilt angle), and DNA concentration were used to control the density and height of DNA aligned on the surface. In addition, DNA-templated AuNWs with a complete contact between particles were obtained when the treatment time and the DNA concentration were optimized. For electrical conductivity measurement, an isolated AuNP chain was fixed between two gold electrodes. And, the AuNP chain based on DNA showed an ohmic behavior at room temperature with the conductivity of two orders of magnitude lower than the bulk value.
Keyword: DNA; AuNPs, AuNWs; Nanodevice