Tailored Secondary Growth on Au Nanorods through Regioselective Adsorption
Precise controlling nanostructures of nanosized metals using simple process will be very important for developing novel metal inks for printing electrodes and wires. In this paper, Au nanorods were used as seeds for the tailored secondary growth of thin shell of gold or silver by using a mild reduci...
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Veröffentlicht in: | Japanese Journal of Applied Physics 2010-05, Vol.49 (5), p.05EA13-05EA13-3 |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | Precise controlling nanostructures of nanosized metals using simple process will be very important for developing novel metal inks for printing electrodes and wires. In this paper, Au nanorods were used as seeds for the tailored secondary growth of thin shell of gold or silver by using a mild reducing agent, ascorbic acid, in the presence of cetyltrimethylammonium bromide under ambient conditions. We could tailor the secondary growth of sheathes of gold and silver on gold nanorods via regioselective adsorption on Au nanorods. Before we grew thin sheath of Au or Ag, 1,3-propanedithiol was introduced first to be regioselectively adsorbed on {111} and {100} planes of gold nanorod seeds to prevent the secondary crystal growth so that the sheath crystal could grow favorably to the direction of {110} planes of the seeds. |
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ISSN: | 0021-4922 1347-4065 |
DOI: | 10.1143/JJAP.49.05EA13 |