Graphene Oxide Dielectric Permittivity at GHz and Its Applications for Wireless Humidity Sensing
Year: 2018
Type: article
Abstract: In this work, the relative dielectric permittivity of graphene oxide (GO), both its real and imaginary parts, have been measured under various humidity conditions at GHz. It is demonstrated that the relative dielectric permittivity increases with increasing humidity due to water uptake. This finding is very different to that at a couple of MHz or lower frequency, where the relative dielectric permittivity increases with decreasing humidity. This GO electrical property was used to create a battery-free wireless radio-frequency identification (RFID) humidity sensor by coating printed graphene antenna with the GO layer. The resonance frequency as well as the backscattering phase of such GO/graphene antenna become sensitive to the surrounding humidity and can be detected by the RFID reader. This enables battery-free wireless monitoring of the local humidity with digital identification attached to any location or item and paves the way for low-cost efficient sensors for Internet of Things (IoTs) applications.
Source: Scientific Reports
Institutions: University of Manchester, BGT Materials (United Kingdom)
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $1,623
Awards: 2D Materials for Next Generation Healthcare Technologies (2D-Health), Engineering van der Waals heterostructures: from atomic level layer-by-layer assembly to printable innovative devices, G2940690049, Sir Henry Royce Institute - Manchester and NNL Equipment, The National Graphene Institute, G516966722, G657448715, The Royce: Capitalising on the investment, G7452299184, Sir Henry Royce InsStitute - recurrent grant
OpenAlex ID: W2963318982