Growth of anisotropic gold nanostructures on conducting glass surfaces |
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Authors: | P R Sajanlal and T Pradeep |
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Institution: | (1) DST Unit on Nanoscience (DST UNS), Department of Chemistry and Sophisticated Analytical Instrument Facility, Indian Institute of Technology Madras, Chennai, 600 036, India |
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Abstract: | In this paper, we describe a method for the growth of gold nanowires and nanoplates starting from a bilayer array of gold
seeds, anchored on electrically conducting indium tin oxide (ITO) substrates. This is based on a seed-mediated growth approach,
where the nanoparticles attached on the substrate through molecular linkages are converted to nanowires and nanoplates at
certain cetyltrimethylammonium bromide (CTAB) concentration. Our modified approach can be used to make nanowires of several
tens of micrometers length at a lower CTAB concentration of 0.1 M. The length of the nanowires can be varied by adjusting
the time of the reaction. As the concentration of CTAB was increased to 0.25 M, the nanoparticles got converted to nanoplates.
These Au nanoplates are (111) oriented and are aligned parallel to the substrate. |
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Keywords: | Gold ITO nanowires nanoplates seed-mediated growth |
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