Self-activated ultrahigh chemosensitivity of oxide thin film nanostructures for transparent sensors

Title
Self-activated ultrahigh chemosensitivity of oxide thin film nanostructures for transparent sensors
Authors
이재우심영석김도홍정후영정명호정주영한승민김종규김진상박형호이종흔Harry L. Tuller윤석진장호원
Issue Date
2012-08
Publisher
Scientific Reports
Citation
VOL 2, 588-1-588-7
Abstract
One of the top design priorities for semiconductor chemical sensors is developing simple, low-cost, sensitive and reliable sensors to be built in handheld devices. However, the need to implement heating elements in sensor devices, and the resulting high power consumption, remains a major obstacle for the realization of miniaturized and integrated chemoresistive thin film sensors based on metal oxides. Here we demonstrate structurally simple but extremely efficient all oxide chemoresistive sensors with ~90% transmittance at visible wavelengths. Highly effective self-activation in anisotropically self-assembled nanocolumnar tungsten oxide thin films on glass substrate with indium-tin oxide electrodes enables ultrahigh response to nitrogen dioxide and volatile organic compounds with detection limits down to parts per trillion levels and power consumption less than 0.2 microwatts. Beyond the sensing performance, high transparency at visible wavelengths creates opportunities for their use in transparent electronic circuitry and optoelectronic devices with avenues for further functional convergence.
URI
http://pubs.kist.re.kr/handle/201004/45683
ISSN
20452322
Appears in Collections:
KIST Publication > Article
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