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Enhancement of self-powered humidity sensing of graphene oxide–based triboelectric nanogenerators by addition of graphene oxide nanoribbons

Enhancement of self-powered humidity sensing of graphene oxide–based triboelectric nanogenerators by addition of graphene oxide nanoribbons

Authors :
Elham Asadian
Faezeh Ejehi
Pezhman Sasanpour
Somayeh Fardindoost
Raheleh Mohammadpour
Source :
Microchimica Acta. 188
Publication Year :
2021
Publisher :
Springer Science and Business Media LLC, 2021.

Abstract

A triboelectric nanogenerator (TENG) electrode sensitive to the adsorption of water molecules has been introduced to create a self-powered humidity sensor. Graphene oxide (GO) nanosheets and graphene oxide nanoribbon (GONR) possessing oxygenated functional groups, as well as high dielectric constants, have been proposed as appropriate candidates for this purpose. GO papers have been fabricated in three forms, i.e. pure GO paper, uniform composites of GONR and GO, and double-layer structures of GONR on top of GO. Results showed that all of the prepared paper-based TENGs revealed excellent performances by maximum output voltage above 300 V. As active humidity sensors, the maximum voltage response values of 57%, 124%, and 78% were obtained for GO, GONR+GO, and GONR/GO TENGs, respectively. Besides high sensitivity and precision of all variants, GO+GONR TENG demonstrated a rapid response/recovery behavior (0.3/0.5 s). This phenomenon can be attributed to the higher oxygenated groups and defects on the edges of GONR, which leads to facilitating the bulk diffusion of water molecules. Our results open new avenues of GONR application as an additive to enhance the performance of self-powered humidity sensors, as well as conventional hygrometers.

Details

ISSN :
14365073 and 00263672
Volume :
188
Database :
OpenAIRE
Journal :
Microchimica Acta
Accession number :
edsair.doi.dedup.....22d54f2e3e62a21d1d95ab8e240b4dd7
Full Text :
https://doi.org/10.1007/s00604-021-04921-y