2026-09-16T10:10:48Zhttps://riubu.ubu.es/oai/requestoai:riubu.ubu.es:10259/110622025-11-15T01:05:27Zcom_10259_5822com_10259_5086com_10259_2604col_10259_5823
Repositorio Institucional de la Universidad de Burgos
author
Ruiz Fernández, Virginia
author
Fernández, Iván
author
Carrasco, Pedro Mª
author
Cabañero, Germán
author
Grande, Hans J.
author
Herrán, Jaime
2025-11-14T12:00:20Z
2025-11-14T12:00:20Z
2015-10
0925-4005
https://hdl.handle.net/10259/11062
10.1016/j.snb.2015.04.092
A room temperature graphene quantum dots (GQDs) based sensing material for relative humidity monitoring is presented. GQDs are synthesized by pyrolysis of citric acid and are deposited on a metallic interdigitated microelectrodes by drop-casting technology. GQDs are nanosheets around 20 nm in average lateral size and an average height of 2.7 ± 0.9 nm. The response time is around few seconds and the sensitivity shows an exponential relation between 15 and 80% of RH, in resistive configuration device working at room temperature. The electrical changes as a function of the RH are related to the capillary condensation produced on the surface of the GQDs. Due to this physical behavior, a resistive path is formed between the microelectrodes and the condensed water vapor, and the resistivity of the system diminishes as the RH increases. A comparison on real time between the sensor developed and a commercial device corroborates the potential application of the novel sensor presented in this work.
eng
Attribution-NonCommercial-NoDerivatives 4.0 Internacional
Graphene quantum dots
Humidity sensors
Capillary condensation
Resistive device
Room temperature
Graphene quantum dots as a novel sensing material for low-cost resistive and fast-response humidity sensors
info:eu-repo/semantics/article
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URL
https://riubu.ubu.es/bitstream/10259/11062/1/Ruiz-sabc_2015.pdf
File
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Ruiz-sabc_2015.pdf