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In this work, a pixeled plasmonic metasurface has been employed as a Surface Enhanced InfraRed Absorption (SEIRA) spectroscopy platform to detect small amounts of compounds containing a peculiar IR signature. In particular, the N3 bonds vibrational feature (placed around 2100 cm−1) has been chosen due to its location far from the fingerprint region. The proposed platform has demonstrated its capability to detect and amplify the selected IR signature with a compound containing the abovementioned vibrational feature. In particular, the K molecule (Ac-Lys(N3)-Cys-NH2) has been considered as a proof of principle molecule, showing both a strong absorption peak corresponding to the detection of the N3 bonds and a maximum redshift of 65 cm−1 as compared to the naked sensors.

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Detection of Selected IR Signatures Through SEIRA Sensing Platform

  • 会议论文

  • 发表日期：

    2025年

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  • Valentina Di Meo,
  • Alessio Crescitelli,
  • Massimo Moccia,
  • Emanuela Iaccarino,
  • Annamaria Sandomenico,
  • Vincenzo Galdi,
  • Menotti Ruvo,
  • Ivo Rendina,
  • Emanuela Esposito

摘要

In this work, a pixeled plasmonic metasurface has been employed as a Surface Enhanced InfraRed Absorption (SEIRA) spectroscopy platform to detect small amounts of compounds containing a peculiar IR signature. In particular, the N3 bonds vibrational feature (placed around 2100 cm−1) has been chosen due to its location far from the fingerprint region. The proposed platform has demonstrated its capability to detect and amplify the selected IR signature with a compound containing the abovementioned vibrational feature. In particular, the K molecule (Ac-Lys(N3)-Cys-NH2) has been considered as a proof of principle molecule, showing both a strong absorption peak corresponding to the detection of the N3 bonds and a maximum redshift of 65 cm−1 as compared to the naked sensors.