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13 March 2024 Nanowire mesh sensor for SERS breath analysis
Marios Constantinou, Sotirios Christodoulou, Agapios Agapiou, Chrysafis Andreou
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Proceedings Volume 12861, Frontiers in Biological Detection: From Nanosensors to Systems XVI; 1286103 (2024) https://doi.org/10.1117/12.3001000
Event: SPIE BiOS, 2024, San Francisco, California, United States
Abstract
We report a quick and low-cost method for the fabrication of a label-free gas nanosensor for breath analysis, based on surface enhanced Raman spectroscopy (SERS), using nanowires (NWs) as a backbone. We followed a fully solution-processed method for the decoration of TiO2 NWs with plasmonic gold (Au) nanoparticles (NPs), and their subsequent dielectrophoretic (DEP) self-assembly on predefined substrate locations. This approach produces a 3D NW mesh that maximizes the SERS-active surface of the device, while achieving signal reliability and reproducibility. The sensor’s performance was tested using 4-aminothiophenol (4-ATP) in gas phase, at concentrations as low as 0.01 parts-per-million (ppmv). These findings demonstrate the applicability of the NW mesh sensor for the development of breath analysis platforms for diagnostic and medical screening applications.
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(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.
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Marios Constantinou, Sotirios Christodoulou, Agapios Agapiou, and Chrysafis Andreou "Nanowire mesh sensor for SERS breath analysis", Proc. SPIE 12861, Frontiers in Biological Detection: From Nanosensors to Systems XVI, 1286103 (13 March 2024); https://doi.org/10.1117/12.3001000
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KEYWORDS
Nanowires
Dielectrophoresis
Sensors
Surface enhanced Raman spectroscopy
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