Silver nanoparticle arrays enhanced spectral surface plasmon resonance optical sensor
- Author(s): Wei Zhang 1, 2 ; Weixiang Ye 1, 2 ; Cheng Wang 1, 2, 3 ; Wenbin Li 1, 2 ; Zhao Yue 1, 2 ; Guohua Liu 1, 2
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View affiliations
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Affiliations:
1:
College of Electronic Information and Optical Engineering, Nankai University, Tianjin 300071, People's Republic of China;
2: Key Laboratory of Photo-electronic Thin Film Devices and Technology of Tianjin, Nankai University, Tianjin 300071, People's Republic of China;
3: Department of Mechanical Engineering, Columbia University, New York 10027, USA
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Affiliations:
1:
College of Electronic Information and Optical Engineering, Nankai University, Tianjin 300071, People's Republic of China;
- Source:
Volume 9, Issue 9,
September 2014,
p.
585 – 587
DOI: 10.1049/mnl.2014.0203 , Online ISSN 1750-0443
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.
Inspec keywords: organic compounds; gold; silver; metallic thin films; nanoparticles; surface plasmon resonance; optical sensors; self-assembly
Other keywords: Au; gold sensing film; evanescent field; perturbations; Dextran capped silver nanoparticle array; spectral shift response; spectral surface plasmon resonance optical sensor; self-assembly; penetration depth; Ag
Subjects: Self-assembly in nanofabrication; Structure of solid clusters, nanoparticles, nanotubes and nanostructured materials; Sensing devices and transducers; Sensing and detecting devices; Optical properties of metals and metallic alloys (thin films, low-dimensional and nanoscale structures); Optical instruments and techniques
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