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...

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Main Authors: Serban, Bogdan-Catalin, Dumbravescu, Niculae, Buiu, Octavian, Bumbac, Marius, Pachiu, Cristina, Brezeanu, Mihai, Craciun, Gabriel, Nicolescu, Cristina- Mihaela, Marinescu, Roxana, Cobianu, Cornel
Format: Conference Proceeding
Language:English
Subjects:
Carbon
Carbon nanohorns
Electrical resistance measurement
Humidity
Humidity measurement
Polyimides
Polyvinylpyrrolidone
Resistance
Resistive humidity sensor
Scanning electron microscopy
Semiconductor device measurement
Sensors
Substrates
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Summary: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.
ISSN:2377-0678
DOI:10.1109/CAS62834.2024.10736867