RT info:eu-repo/semantics/article
T1 Graphene quantum dots as a novel sensing material for low-cost resistive and fast-response humidity sensors
A1 Ruiz Fernández, Virginia
A1 Fernández, Iván
A1 Carrasco, Pedro Mª
A1 Cabañero, Germán
A1 Grande, Hans J.
A1 Herrán, Jaime
K1 Graphene quantum dots
K1 Humidity sensors
K1 Capillary condensation
K1 Resistive device
K1 Room temperature
K1 Química analítica
K1 Chemistry, Analytic
K1 Ciencia de materiales
K1 Materials science
AB 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.
PB Elsevier
SN 0925-4005
YR 2015
FD 2015-10
LK https://hdl.handle.net/10259/11062
UL https://hdl.handle.net/10259/11062
LA eng
NO Financial support from the Spanish MICINN (V.R. Ramón y Cajal Program), the Basque Government (Etortek Program, nanoIKER project IE11-304) and the project Hyper (Hybrid Neuroprosthetic and Neurorobotic Devices for Functional Compensation and Rehabilitation of Motor Disorders) under program Consolider-Ingenio 2010–2014, is gratefully acknowledged.
DS Repositorio Institucional de la Universidad de Burgos
RD 29-abr-2026