NDLI: A passive wireless graphene oxide based humidity sensor and associated portable telemetry unit

Content Provider	IEEE Xplore Digital Library
Author	Zhang, C. Huang, J.Q. Huang, Q.A.
Copyright Year	2013
Description	Author affiliation: Key Lab. of MEMS of Minist. of Educ., Southeast Univ., Nanjing, China (Zhang, C.; Huang, J.Q.; Huang, Q.A.)
Abstract	This paper presents a passive wireless humidity sensor based on graphene oxide and its associated portable telemetry unit. The sensor consists of a CMOS interdigital capacitive humidity-sensitive sensor die and a fixed planar spiral inductor on an organic substrate (FR-4), forming an inductor-capacitor (LC) tank circuit. The resonant frequency of the tank is dependent on the sensor capacitance, which changes in response to the humidity. The sensitivity of the sensor is improved significantly by using graphene oxide as sensing material. The sensor is interrogated wirelessly by using our homemade portable telemetry unit. The reader is based on a standing wave ratio (SWR) bridge to measure the real part of the readout coil impedance, thus addressing the need for a low-cost, portable reader for the LC-type passive wireless sensors. Measurements show a sensitivity of -18.75 kHz/%RH over a range of 15-90% RH.
Starting Page	278
Ending Page	281
File Size	1574086
Page Count	4
File Format	PDF
ISBN	9781467359832
ISSN	21641641
DOI	10.1109/Transducers.2013.6626756
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-06-16
Publisher Place	Spain
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Humidity Wireless sensor networks Resonant frequency Wireless communication Graphene Telemetry Inductors wireless sensor Humidity sensor LC sensor passive sensor
Content Type	Text
Resource Type	Article

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