2017/11/09 by Xianjun Huang, Huang, Xianjun, Ting Leng +12
Engineering · Physics and Astronomy · #Advanced Sensor and Energy Harvesting Materials #Applied Physics (physics.app-ph) #FOS: Physical sciences #Gas Sensing Nanomaterials and Sensors #Materials Science (cond-mat.mtrl-sci) #Mesoscale and Nanoscale Physics (cond-mat.mes-hall) #RFID technology advancements #cond-mat.mes-hall #cond-mat.mtrl-sci #physics.app-ph
paper · pdf · doi:10.48550/arxiv.1711.03435
arxiv created 2017/11/09 · openalex publication_date 2017/11/09 · arxiv updated 2017/11/10 · openalex created_date 2017/11/17 · openalex updated_date 2026/07/28
Graphene oxide relative dielectric permittivity, 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 electrical property of graphene oxide was used to create a battery-free wireless radio-frequency identification (RFID) humidity sensor by coating printed graphene antenna with the graphene oxide layer. The resonance frequency as well as the backscattering phase of such graphene oxide/graphene antenna become sensitive to the surrounding humidity and can be detected by the RFID reader. This enables batteryless 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 applications.