Spectral properties of nanoengineered Ag/Au bilayer rods fabricated by electron beam lithography.
Ag/Au bimetallic nanoparticles possess the combinatory advantages of Au and Ag nanoparticles and can also be utilized to tune the properties of localized surface plasmon resonance. Ag/Au bilayer nanorods were prepared by electron beam lithography, and their spectral properties were investigated. Compared with Ag monolayer nanorods, Ag/Au bilayer nanorods show broader localized surface plasmon resonance bands, and the longitudinal mode and transverse mode localized surface plasmon bands show blueshift and redshift, respectively. The maximum near-field intensity of the longitudinal mode of the Ag/Au nanorod is less than half that of the Ag/Au nanorod without gold layer. Shape-induced modification of Ag/Au bilayer nanorods on their spectral properties was also discussed.
State Key Laboratory of Silicon Materials, Zhejiang University, Hangzhou, China.
Li
L
Wang
Wei
W
Xiong
Yoshiaki
Y
Nishijima
Yukie
Y
Yokota
Kosei
K
Ueno
Hiroaki
H
Misawa
Jianrong
J
Qiu
Gang
G
Bi