Analytical Sciences

Abstract − Analytical Sciences, 25(12), 1387 (2009).

Facile Method for Constructing Metallic Nanoarrays on a Solid Surface
Hidenobu NAKAO
Nanoarchitecture Group, Organic Nanomaterials Center, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
This review highlights work using the author's method to construct metallic nanoarrays. This method is a DNA-templated assembly, to assemble metal nanoparticles (MNPs) in which DNA molecules are initially stretched and aligned on surfaces. Simple interface (air-liquid) moving and surface coating with polymers containing π-conjugation units, lead to the controlled formation of one-dimensional (1D) nanoarrays of DNA without special equipment. The assembly of MNPs onto DNA can be driven by electrostatic binding of newly prepared gold nanoparticles with positive charges, leading the formation of 1D metallic nanoarrays. Dark-field microscopy observations indicate that MNPs on DNA are uniaxially aligned. Finally, the fabrication and patterning of metallic nanoarrays achieved with DNA nanofibers and transfer printing techniques are discussed.