Abstract
Co nanoparticles have been assembled in situ on a template of double-strandeddeoxyribonucleic acid (DNA) to form magnetic nanowires. DNA was immobilized on freshlycleaved mica or silanized glass and oriented by molecular combing. Pd(II) ions boundto DNA were reduced to zero-valence nanoclusters, which selectively catalyseddeposition of Co(0) in a dimethylamine borane (DMAB)-based reducing bath. Conanoclusters grew only where Pd nuclei were localized on the DNA template. Materialcharacterization by UV–vis spectroscopy (UVS), atomic force microscopy (AFM),and energy dispersive x-ray (EDX) spectroscopy revealed that the fabricationprocess resulted in the formation of Co nanowires microns long and 10–20 nm thick.
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