News Column

Researchers at Xi'an Jiao Tong University Target Mineralogy

June 20, 2014



By a News Reporter-Staff News Editor at Mining & Minerals -- Data detailed on Mineralogy have been presented. According to news originating from Xi'an, People's Republic of China, by VerticalNews correspondents, research stated, "Plasmonic light absorption properties of bimetallic Au-Ag core-shell nanorod with nonhomogeneous Ag coating are investigated both theoretically and experimentally. When the Ag coating on the Au nanorod is not homogeneous, the overall aspect ratio and Ag composition greatly depends on the coating uniform, which strongly affects intensity changing and wavelength shift of the plasmonic absorption."

Our news journalists obtained a quote from the research from Xi'an Jiao Tong University, "When the transverse Ag coating is faster than longitudinal coating, the Au-Ag core-shell nanorod could present two intense longitudinal plasmonic absorption peaks with equal intensity and small wavelength gap as the Ag shell thickness has a critical value. Furthermore, this critical Ag shell thickness could be decreased when the Au nanorod core has a small aspect ratio. When the longitudinal Ag coating is faster than transverse coating, the increasing intensity of longitudinal peak corresponding to outer Ag surface is always weaker than the longitudinal peak corresponding to Au-Ag interface. Thus, we cannot obtain two equal intense plasmonic absorption peaks when the longitudinal Ag coating is thicker than the transverse coating. However, the transverse peak corresponding to Au-Ag interface could be enhanced by decreasing the aspect ratio of the Au nanorod core."

According to the news editors, the research concluded: "Thus, we can always find three distinct absorption peaks as the aspect ratio of Au nanorod is decreased and the longitudinal Ag coating is greater than transverse coating."

For more information on this research see: The effect of nonhomogeneous silver coating on the plasmonic absorption of Au-Ag core-shell nanorod. Gold Bulletin, 2014;47(1-2):47-55. Gold Bulletin can be contacted at: Springer Heidelberg, Tiergartenstrasse 17, D-69121 Heidelberg, Germany. (Springer - www.springer.com; Gold Bulletin - www.springerlink.com/content/0017-1557/)

The news correspondents report that additional information may be obtained from J. Zhu, Xi An Jiao Tong Univ, Sch Life Sci & Technol, Key Lab Biomed Informat Engn, Minist Educ, Xian 710049, People's Republic of China. Additional authors for this research include F. Zhang, J.J. Li and J.W. Zhao.

Keywords for this news article include: Asia, Xi'an, Mineralogy, People's Republic of China

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Source: Mining & Minerals