Investigation of the properties of flexible humidity sensor based on reduced graphene oxide by laser irradiation

Semenova, A. A.; Vinokurov, P. V.; Smagulova, S. A.

doi:10.1063/1.5079348

Cited by 1 publication

(1 citation statement)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…When GO is deposited on a suitable surface, by a simple drop-casting procedure, the method is particularly attractive as can be used for rapid and precise mask-less patterning, at the micrometric scale, to create conductive rGO traces, surrounded by insulating GO, with no need of photolithography [9][10][11][12][13][14]. Among several possible uses, such conductive structures have been exploited for resistive humidity sensing [15,16] and mechanical sensing [17], or as electrodes in capacitive humidity sensing [15,18], where the dielectric is the nonreduced GO.…”

Section: Introductionmentioning

confidence: 99%

Reduction of Graphene Oxide by Laser Scribing in Different Atmospheres and Application in Humidity Sensing

Scardaci

Fichera

Fragalà

et al. 2020

Journal of Nanomaterials

View full text Add to dashboard Cite

Laser scribing, by far proposed as a method for efficiently transforming graphene oxide into reduced graphene, has been employed, using a CW laser beam, to study the modifications of graphene oxide scribed under different controlled atmospheres, including air, N2, Ar, and a 95 : 5 (v/v) Ar/H2 mixture. We have found that laser scribing effects, including chemical composition, order degree, and electrical properties, strongly depend upon the atmosphere during the irradiation. The electrical properties of the various materials, obtained in different atmospheres, have been evaluated with respect to the sensing properties towards humidity, the materials produced in pure Argon yielding the highest sensitivity and the fastest response, while related Raman microspectroscopy measurements showed that both Ar and Ar-H2 mixture produce the highest order among the various samples. The results stress the importance and the potentialities of controlling the irradiation atmosphere in order to tune the composition and electrical properties of the laser-scribed graphene oxide materials.

show abstract