Title :
Synthesis and raman response of multiwalled-carbon nanotubes decorated with gold nanobowls prepared via galvanic replacement of silver nanoparticles
Author :
Obliosca, Judy M. ; Wang, Pen-Cheng ; Tseng, Fan-Gang
Author_Institution :
Dept. of Eng. & Syst. Sci., Nat. Tsing Hua Univ., Hsinchu, Taiwan
Abstract :
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.
Keywords :
CVD coatings; Raman spectra; carbon nanotubes; galvanising; gold; nanofabrication; nanoparticles; silver; 1-octanethiol; 3-fold Raman signal enhancement; Au; C; Raman response; galvanic replacement; gold nanobowls; multiwalled carbon nanotubes synthesis; silver nanoparticles; wet chemical process; Carbon nanotubes; Gold; Nanobioscience; Nanoparticles; Raman scattering; Silver; Surface treatment; Galvanic replacement; Raman scattering; gold nanobowls; multiwalledcarbon nanotubes; silver nanoparticles;
Conference_Titel :
Nano/Micro Engineered and Molecular Systems (NEMS), 2011 IEEE International Conference on
Conference_Location :
Kaohsiung
Print_ISBN :
978-1-61284-775-7
DOI :
10.1109/NEMS.2011.6017415
