Control of surface plasmon localization via self-assembly of silver nanoparticles along silver nanowires.
A simple and low-cost method to create metal-metal hybrid nanostructures possessing fairly regularly spaced "hot-spots" of surface plasmon resonances is proposed. The nanohybrid structure was prepared via self-assembly during a simple drop-casting procedure, using chemically synthesized silver nanowires and silver nanoparticles prepared in a single batch of a polyol process. Wide field illumination of these nanohybrids produced hot-spots with spacings of around 500 nm to 1 microm. The intensity of the emission/scattering from the hot-spots fluctuates over time. The proposed structure can be useful for the development of molecular-sensors or as a substrate for surface enhanced Raman/fluorescence spectroscopy.
Tran
M Linh
ML
Department of Chemistry and Center for Surface Chemistry and Catalysis, Katholieke Universiteit Leuven, Celestijnenlaan 200 F, B-3001 Leuven, Belgium.
Centeno
Silvia P
SP
Hutchison
James A
JA
Engelkamp
Hans
H
Liang
Duoduo
D
Van Tendeloo
Gustaaf
G
Sels
Bert F
BF
Hofkens
Johan
J
Uji-i
Hiroshi
H