DocumentCode
85385
Title
Silver nanoparticle arrays enhanced spectral surface plasmon resonance optical sensor
Author
Wei Zhang ; Weixiang Ye ; Cheng Wang ; Wenbin Li ; Zhao Yue ; Guohua Liu
Author_Institution
Coll. of Electron. Inf. & Opt. Eng., Nankai Univ., Tianjin, China
Volume
9
Issue
9
fYear
2014
fDate
Sept. 2014
Firstpage
585
Lastpage
587
Abstract
An on-chip spectral surface plasmon resonance (SPR) optical sensor with a silver nanoparticle (Ag NP) array has been designed. Dextran (Dex)-capped Ag NP (Dex-Ag NP) arrays were initially self-assembled on the gold (Au) sensing film. The large perturbations and increased penetration depth of the evanescent field, which is caused by the use of the Dex-Ag NP array self-assembled on the Au sensing film, can effectively enhance the SPR spectral shift response. Compared with the bare Au sensing film configuration, the Au sensing film with a Dex-Ag NP array configuration improves sensitivity from 5492 to 6613 nm/RIU.
Keywords
gold; metallic thin films; nanoparticles; optical sensors; organic compounds; self-assembly; silver; surface plasmon resonance; Ag; Au; Dextran capped silver nanoparticle array; evanescent field; gold sensing film; penetration depth; perturbations; self-assembly; spectral shift response; spectral surface plasmon resonance optical sensor;
fLanguage
English
Journal_Title
Micro & Nano Letters, IET
Publisher
iet
ISSN
1750-0443
Type
jour
DOI
10.1049/mnl.2014.0203
Filename
6910088
Link To Document