Nanomaterials Functionalized Patterned Structures for Gas Sensing and Biological Applications

Abstract

To address toxic gas problem, we carried out an experiment to study Fe3O4-mediated dielectric sensor using CSRR for the toxic NO2 gas sensing. The CSRR sensor detects changes in the dielectric constant of NO2-purged-Fe3O4 NPs. The interaction of NO2 with Fe3O4 NPs gradually alters their dielectric values, which is detected by a unit cell of the CSRR with a resonance frequency of 428 MHz. As the intruding NO2 concentration changes from 0-to-106 ppm, it exhibits a steady shift in resonant frequency as well as a new signature developing around 300 MHz. newline