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Ultrasensitive Room-Temperature Operable Gas Sensors Using p‑Type Na:ZnO Nanoflowers for Diabetes Detection
journal contribution
posted on 2017-02-22, 00:00 authored by Rawat Jaisutti, Minkyung Lee, Jaeyoung Kim, Seungbeom Choi, Tae-Jun Ha, Jaekyun Kim, Hyoungsub Kim, Sung Kyu Park, Yong-Hoon KimUltrasensitive room-temperature
operable gas sensors utilizing the photocatalytic activity of Na-doped
p-type ZnO (Na:ZnO) nanoflowers (NFs) are demonstrated as a promising
candidate for diabetes detection. The flowerlike Na:ZnO nanoparticles
possessing ultrathin hierarchical nanosheets were synthesized by a
facile solution route at a low processing temperature of 40 °C.
It was found that the Na element acting as a p-type dopant was successfully
incorporated in the ZnO lattice. On the basis of the synthesized p-type
Na:ZnO NFs, room-temperature operable chemiresistive-type gas sensors
were realized, activated by ultraviolet (UV) illumination. The Na:ZnO
NF gas sensors exhibited high gas response (S of
3.35) and fast response time (∼18 s) and recovery time (∼63
s) to acetone gas (100 ppm, UV intensity of 5 mW cm–2), and furthermore, subppm level (0.2 ppm) detection was achieved
at room temperature, which enables the diagnosis of various diseases
including diabetes from exhaled breath.
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Na elementchemiresistive-type gas sensorsp-type dopantUV intensitygas responseUltrasensitive Room-Temperature Operable Gas SensorsNFdiabetes detectionsolution routegas sensorsNa-doped p-type ZnOphotocatalytic activityprocessing temperatureDiabetes Detection Ultrasensitive room-temperatureroom temperatureZnO lattice
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