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Jeong, Hu Young
UNIST Central Research Facilities (UCRF)
Research Interests
  • Soft material characterization such as graphene using a low kV Cs-corrected TEM

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

Cited 18 times inthomson ciCited 13 times inthomson ci
Title
Self-activated ultrahigh chemosensitivity of oxide thin film nanostructures for transparent sensors
Author
Moon, Hi GyuShim, Young-SoekKim, Do HongJeong, Hu YoungJeong, MyounghoJung, Joo YoungHan, Seung MinKim, Jong KyuKim, Jin-SangPark, Hyung-HoLee, Jong-HeunTuller, Harry L.Yoon, Seok-JinJang, Ho Won
Keywords
GLANCING ANGLE DEPOSITION; GAS SENSORS; ELECTRONIC NOSE; HOLLOW HEMISPHERES; CARBON NANOTUBES; CHEMICAL SENSORS; GRAIN-SIZE; METAL; NANOWIRE; SENSITIVITY
Issue Date
201208
Publisher
NATURE PUBLISHING GROUP
Citation
SCIENTIFIC REPORTS, v.2, no., pp. -
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 similar to 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.
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DOI
http://dx.doi.org/10.1038/srep00588
ISSN
2045-2322
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UCRF_Journal Papers
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