Preparation of Au@Ag Core-Shell Nanorods and Investigation of its Surface Plasmon

Abstract:

Different aspect ratio (length/width) gold nanorods were prepared in aqueous solution by seeding growth method. Aspect ratio of the nanorods was controlled accurately by changing the silver ions concentration. Ultraviolet-visible (UV-vis) spectra demonstrate the regularation that longitudinal plasmon resonance absorption wavelength of gold nanorods reveal red shift with the increase of aspect ratio. Gold nanorods were wrapped with Ag shells by chemical reduction silver ions on its surface. Different from gold nanorods, the transverse modes of the Au@Ag core-shell nanorods have two bands which contributed from the Ag and Au, respectively. On the other hand, centers of longitudinal surface plasmon of the core-shell nanorods exhibit blue shift with the Ag shell thickness increasing.

• Periodical: Advanced Materials Research (Volumes 535-537)
• Pages: 446-449
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.535-537.446
• Online since: June 2012
• Authors: Wei Yuan, Pei Jie Wang, Yan Fang
• Keywords: Au@Ag Core-Shell Nanorods, Gold Nanorods, Surface Plasmon Resonance (SPR)

References

[1] Xiaohua Huang, Svetlana Neretina and Mostafa A. El-Sayed: Adv. Mater. Vol. 21 (2009), p.4880.

[2] X. H. Huang, I. H. El-Sayed, W. Qian and M. A. El-Sayed: Nano Lett. Vol. 7 (2007) p.1591.

[3] Xiaohua Huang, Ivan H. El-Sayed, Wei Qian and Mostafa A. El-Sayed: Nano Lett. Vol. 7 (2007), p.1591.

[4] N. J. Durr, T. Larson, D. K. Smith, B. A.Korgel, K. Sokolov and A. Ben-Yakar: Nano Lett. Vol 7 (2007), p.941.

DOI: 10.1021/nl062962v

[5] Catherine J. Murphy, Tapan K. Sau, Anand M. Gole, Christopher J. Orendorff, Jinxin Gao, Linfeng Gou, Simona E. Hunyadi and Tan Li: J. Phys. Chem. B Vol. 109 (2005), p.13857.

DOI: 10.1021/jp0516846

[6] Babak Nikoobakht and Mostafa A. El-Sayed: Chem. Mater. Vol. 15 (2003), p.1957.

[7] Mingzhao Liu and Philippe Guyot-Sionnest: J. Phys. Chem. B Vol. 109 (2005), p.22192.

[8] A. Henglein and C. Brancewicz: Chem. Mater. Vol. 9 (1997), p.2164.

[9] M. J. Hostetler, C. J. Zhong, B. K. H. Yen, J. Anderegg, S. M. Gross, N. D. Evans, M. Porter and R. W. J. Am. Murray: Chem. Soc. Vol. 120 (1998), p.9396.

DOI: 10.1021/ja981454n

[10] N. Toshima and Y. Wang: Langmuir Vol. 10 (1994), p.4574.

[11] Surojit Pande, Sujit Kumar Ghosh, Snigdhamayee Praharaj, Sudipa Panigrahi, Soumen Basu, Subhra Jana, Anjali Pal, Tatsuya Tsukuda and Tarasankar Pal: J. Phys. Chem. C Vol. 111 (2007), p.10806.

DOI: 10.1021/jp0702393

[12] Yuriy Khalavka, Jan Becker and Carsten So¨nnichsen: J. AM. CHEM. SOC. Vol. 131 (2009), p.1871.

[13] Jan Becker, Inga Zins, Arpad Jakab, Yuriy Khalavka, Olaf Schubert and Carsten Sönnichsen: Nano Lett. Vol. 8 (2008), p.1719.

DOI: 10.1021/nl080720k