Carbon Nanohorns - PVP Nanocomposite As Sensing Layer For Resistive Humidity Monitoring: Preliminary Results
A novel nanocomposite layer comprising pristine carbon nanohorns (CNHs) and polyvinylpirrolidone (PVP) at 9/1 w/w ratio is reported as a relative humidity (RH) sensing layer employed in a RH detector comprising polyimide, as substrate, and gold, as interdigitated electrodes (IDTs). The structure of the sensing layer, deposited by means of the drop-casting method, is analyzed by Scanning Electron Microscopy (SEM) and RAMAN spectroscopy. Electrical measurements show that the resistance of the of the nanofilm increases for RH between 0% and 70% and for RH larger than 90%. For RH in the 70%-90% range, the resistance decreases with RH. The paper discusses several sensing mechanisms which might explain the measured RH detection behavior.
Authors
- M. Brezeanu (ORCID: https://orcid.org/0000-0001-7835-4798)
- Roxana Marinescu (ORCID: https://orcid.org/0009-0005-9326-1959)
- Cristina Mihaela Nicolescu (ORCID: https://orcid.org/0000-0002-6286-1303)
- Cristina Pachiu (ORCID: https://orcid.org/0000-0003-1799-5158)
- Niculae Dumbrăvescu
- Octavian Buiu (ORCID: https://orcid.org/0000-0002-5713-4304)
- C. Cobianu (ORCID: https://orcid.org/0000-0001-9237-9262)
- Marius Bumbac (ORCID: https://orcid.org/0000-0002-7568-0931)
- Gabriel Crăciun (ORCID: https://orcid.org/0000-0002-7886-578X)
- Bogdan-Catalin Serban
Institutions
- Academia Oamenilor de Știință din România (RO)
- Valahia University of Targoviste (RO)
- National Institute for Research and Development in Microtechnologies (RO)
- Universitatea Națională de Știință și Tehnologie Politehnica București (RO)
Publication Details
- Published
- 2024-10-09
- DOI
- https://doi.org/10.1109/cas62834.2024.10736867
- Citations
- 1
- Primary Topic
- Gas Sensing Nanomaterials and Sensors
- Type
- article
- Field-Weighted Citation Impact
- 0.21