Raman spectroscopy for carbon nanotubes-based flexible sensor instrumentation: a proof of concept

• Main Authors: Carrillo-Velazquez, Manuel, Godinez-Garcia, Francisco J., Gamero-Inda, Eduardo, Villanueva-Fierro, Ignacio, Gomez-Elizalde, Jose A., Ortiz-Medina, Josue
• Format: Conference Proceeding
• Language: English
• Subjects: Carbon nanotubes; Current measurement; Deformation; flexible sensor; instrumentation; Instruments; Mechanical sensors; Raman scattering; Raman spectroscopy; Sensor phenomena and characterization
• ISSN: 2640-6535
• DOI: 10.1109/ICSIMA62563.2024.10675561

This study reports on the use of Raman spectroscopy in combination with conventional amperometric measurements, for the characterization of mechanical deformations of single-walled carbon nanotubes based flexible sensors. The sensitivity of specific Raman spectroscopy features (i.e., G and 2D-bands) to the electronic environment in graphene-related nanomaterials, proved to be useful for the characterization of morphological changes in the fabricated flexible sensors, through the monitoring of changes in the associated currents in the percolating carbon nanotubes networks. Assessments on the detection of mechanical deformations, in the form of bending at determined angles, were carried out. The expected changes in electrical currents through the flexible sensor were observed, as well as significant responses in key Raman features, which could be used for complementary optical/spectral characterization of the morphological changes. The results suggest that Raman spectroscopy could be a useful and practical technique to complement conventional instrumentation approaches for nanomaterials-based devices, potentially providing additional information on the physical phenomena occurring at the nanoscale.