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Synthesis and raman response of multiwalled-carbon nanotubes decorated with gold nanobowls prepared via galvanic replacement of silver nanoparticles

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3 Author(s)
Obliosca, J.M. ; Dept. of Eng. & Syst. Sci., Nat. Tsing Hua Univ., Hsinchu, Taiwan ; Pen-Cheng Wang ; Fan-Gang Tseng

Gold nanobowls (AuNBs) of ~5 nm in diameter grown on multiwalled carbon nanotubes (MWCNT) were successfully synthesized via galvanic replacement of silver nanoparticles (AgNPs). A 3-fold Raman signal enhancement of MWCNT was observed when Au replacement with Ag approached to completion. Moreover, AuNBs can be readily released from CNT surface via sonication with 1-octanethiol (OT). Our current method demonstrates a novel technique on producing smallest dimension of AuNBs so far simply achieved in wet chemical process.

Published in:
Nano/Micro Engineered and Molecular Systems (NEMS), 2011 IEEE International Conference on

Date of Conference: 20-23 Feb. 2011

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