Real-Time Metasurface Sensor for Monitoring Micropoisons in Aqueous Solutions Based on Gold Nanoparticles and Terahertz Spectroscopy

David Rotshild, Yossi Azoulay, Amir Abramovich

Research output: Contribution to journalArticlepeer-review

Abstract

Proof of concept of a new real-time metasurface sensor for micropoison monitoring in aqueous solutions is proposed in this study. The sensor comprises a perfect absorber metasurface and gold nanoparticle layer on the front side of it. Frequency-domain terahertz spectroscopy system was used to measure the resonance frequency shift due to the presence of the micropoison. The perfect absorber metasurface sensor was fabricated using a double-sided FR4 substrate printed board circuit, which is very inexpensive. A significant increase in the metasurface sensor sensitivity was achieved by adding a gold nanoparticle layer to the gap of the double split rectangular resonator on the front side of the metasurface sensor.

Original languageEnglish
Article number1279
JournalSensors
Volume22
Issue number3
DOIs
StatePublished - 1 Feb 2022

Keywords

  • Double split rectangular resonator
  • Frequency-domain spectroscopy
  • Gold nanoparticles
  • Metasurface
  • Micropoisons in aqueous solutions

All Science Journal Classification (ASJC) codes

  • Analytical Chemistry
  • Information Systems
  • Atomic and Molecular Physics, and Optics
  • Biochemistry
  • Instrumentation
  • Electrical and Electronic Engineering

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