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A Self-Referenced Refractive Index Sensor Based on Gold Nanoislands

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اقرأ أكثر حفظ في قائمتي
  • المؤلفون: Angulo Barrios, Carlos; Mirea, Teona; Huerga Represa, Miguel
  • المصدر:
    Sensors, ISSN 1424-8220, 2023-01-01, Vol. 23, No. 66
  • نوع التسجيلة:
    Electronic Resource
  • الدخول الالكتروني :
    https://oa.upm.es/81743/
    https://doi.org/10.3390/s23010066
    https://doi.org/10.3390/ s23010066
    info:eu-repo/grantAgreement/MINECO//PID- 2020-118410RB-C22
    info:eu-repo/grantAgreement/CAM//Research Grants for Young Investigators
    info:eu-repo/semantics/altIdentifier/doi/10.3390/s23010066
  • معلومة اضافية
    • Publisher Information:
      E.T.S.I. Telecomunicación (UPM) 2023-01-01
    • نبذة مختصرة :
      We report on a self-referenced refractive index optical sensor based on Au nanoislands. The device consists of a random distribution of Au nanoislands formed by dewetting on a planar SiO2/metal Fabry–Pérot cavity. Experimental and theoretical studies of the reflectance of this configuration reveal that its spectral response results from a combination of two resonances: a localized surface plasmon resonance (LSPR) associated to the Au nanoislands and the lowest-order anti-symmetric resonance of the Fabry–Pérot cavity. When the device is immersed in different fluids, the LSPR contribution provides high sensitivity to refractive index variations of the fluid, whereas those refractive index changes have little impact on the Fabry–Pérot resonance wavelength, allowing its use as a reference signal. The self-referenced sensor exhibits a spectral sensitivity of 212 nm/RIU (RIU: refractive index unit), which is larger than those of similar structures, and an intensity sensitivity of 4.9 RIU-1. The proposed chip-based architecture and the low cost and simplicity of the Au nanoisland synthesis procedure make the demonstrated sensor a promising self-referenced plasmonic sensor for compact biosensing optical platforms based on reflection mode operation.
    • الموضوع:
      Electrónica; Física; Optica; info:eu-repo/semantics/article; Artículo; PeerReviewed
    • Note:
      application/pdf
      English
    • Other Numbers:
      UPD oai:oa.upm.es:81743
      1451493379
    • Contributing Source:
      UNIV POLITECNICA DE MADRID
      From OAIster®, provided by the OCLC Cooperative.
    • الرقم المعرف:
      edsoai.on1451493379
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