NDLI: Graphene Oxide Nanofabricated Ultrasonic Transducers (GO-NUTs)

Content Provider	IEEE Xplore Digital Library
Author	Ka Hing Cheng Ching-Hsiang Cheng Kwong Chun Lo
Copyright Year	2015
Description	Author affiliation: Dept. of Ind. & Syst. Eng., Hong Kong Polytech. Univ., Hong Kong, China (Ka Hing Cheng; Ching-Hsiang Cheng; Kwong Chun Lo)
Abstract	Graphene Oxide Nanofabricated Ultrasonic Transducers (GO-NUTs) based on porous electrodes immersed in ionic liquid electrolyte, which use the vibration of the compressible electric double layer to transmit and receive ultrasound with signal level several order of magnitude higher than existing capacitive transducers are introduced. A simple, rapid and scalable method to reduce graphene oxide (GO) by Laser Lightscribe annealing was also demonstrated. The reduced graphene oxide (rGO) for scalable and rapid production was then fabricated to graphene-based ultrasonic transducers which exhibit supercapacitor characteristics. The vibration of ions at the electric double layer (EDL) on the interface of the multi-layer rGO electrode that immersed in liquid electrolyte can simulate the flexible vibrating membrane of capacitive micromachined ultrasonic transducers to match the acoustic impedance of the soft tissue. The amplitude and frequency response to ultrasonic source were measured by oscilloscope and analyzed by MatLab. The capacitance, potential, and frequency response measurement of the GO-NUTs had shown the functionality of the device and suggested it can be used in the high frequency range. The testing result also showed that the reduced graphene oxide had advantages over the material used in traditional piezoelectric ultrasonic transducer. The GO-NUTs could also be further fabricated to interdigitated and array patterns simply by Laser Lightscribe CD/DVD drive and software.
Starting Page	1
Ending Page	4
File Size	1279448
Page Count	4
File Format	PDF
e-ISBN	9781479981823
DOI	10.1109/ULTSYM.2015.0282
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-10-21
Publisher Place	Taiwan
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Ultrasonic transducers Graphene Electrodes Acoustics Ultrasonic imaging Frequency response Liquids Piezoelectric ultrasonic transducer Reduced graphene oxide (rGO) Graphene Oxide Nanofabricated Ultrasonic Transducers (GONUTs) Laser Lightscribe Electric Double Layer (EDL) Capacitive micromachined ultrasonic transducer (CMUT)
Content Type	Text
Resource Type	Article

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