TY - JOUR
T1 - Comparison of plasmonic sensing between polymer-and silica-coated gold nanorods
AU - Omura, Naoya
AU - Uechi, Ichiro
AU - Yamada, Sunao
N1 - Copyright:
Copyright 2019 Elsevier B.V., All rights reserved.
PY - 2009
Y1 - 2009
N2 - Gold nanorods (AuNRs), rod-like gold nanoparticles, show strong plasmon bands in the near-infrared region, based on the longitudinal oscillation mode of surface plasmons. In this research, we have coated AuNRs with silica or poly(sodium 4-styrenesulfonate) (PSS) in order to evaluate the effects of surface modifications as a sensing probe material of AuNR. Multilayered assemblies of the PSS-coated AuNRs have been successfully fabricated on the glass substrate by electrostatic layer-by-layer adsorption, and their plasmonic band profiles have been analyzed as a function of refractive index. The profiles showed satisfactory linear responses with the refractive indices. The effect of the thickness of silica layer on the shift of plasmon band with refractive index of the surrounding media has been investigated, along with, the effect of silica coating on the thermal stability of AuNR. The thermal stability of the silica-coated AuNR has also been investigated. The two types of the above-described coating approaches have been compared.
AB - Gold nanorods (AuNRs), rod-like gold nanoparticles, show strong plasmon bands in the near-infrared region, based on the longitudinal oscillation mode of surface plasmons. In this research, we have coated AuNRs with silica or poly(sodium 4-styrenesulfonate) (PSS) in order to evaluate the effects of surface modifications as a sensing probe material of AuNR. Multilayered assemblies of the PSS-coated AuNRs have been successfully fabricated on the glass substrate by electrostatic layer-by-layer adsorption, and their plasmonic band profiles have been analyzed as a function of refractive index. The profiles showed satisfactory linear responses with the refractive indices. The effect of the thickness of silica layer on the shift of plasmon band with refractive index of the surrounding media has been investigated, along with, the effect of silica coating on the thermal stability of AuNR. The thermal stability of the silica-coated AuNR has also been investigated. The two types of the above-described coating approaches have been compared.
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U2 - 10.2116/analsci.25.255
DO - 10.2116/analsci.25.255
M3 - Article
C2 - 19212062
AN - SCOPUS:70349905576
VL - 25
SP - 255
EP - 259
JO - Analytical Sciences
JF - Analytical Sciences
SN - 0910-6340
IS - 2
ER -