access icon free Silver nanoparticle arrays enhanced spectral surface plasmon resonance optical sensor

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

References

    1. 1)
    2. 2)
    3. 3)
      • 17. Jia, Z.L.: ‘Design and implementation of a fuzzy control filtering approach based on the fractal dimension of the SPR signal’. IEEE Int. Conf. on IEEE Signal Processing, Communication and Computing (ICSPCC), Vancouver, Canada, 2013, pp. 16.
    4. 4)
    5. 5)
      • 12. Li, W.B.: ‘Fabrication of stable silver nanoparticles through a green approach’. 8th IEEE Int. Conf. on IEEE Nano/Micro Engineered and Molecular Systems (NEMS), Suzhou, China, 2013, pp. 13071310.
    6. 6)
    7. 7)
    8. 8)
    9. 9)
    10. 10)
      • 11. Zhang, W.: ‘The analysis of Ag nanospheres and arrays LSPR phenomena based on DDA and FDTD method’, Appl. Mech. Mater., 2012, 110, pp. 38603866.
    11. 11)
    12. 12)
    13. 13)
    14. 14)
    15. 15)
    16. 16)
    17. 17)
    18. 18)
http://iet.metastore.ingenta.com/content/journals/10.1049/mnl.2014.0203
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