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Effect of gamma irradiation on Schottky-contacted vertically aligned ZnO nanorod-based hydrogen sensor
Sapana Ranwa, Surendra Singh Barala, Mattia Fanetti, Mahesh Kumar, 2016, original scientific article

Abstract: We report the impact of gamma irradiation on the performance of a gold Schottky-contacted ZnO nanorod-based hydrogen sensor. RF-sputtered vertically aligned highly c-axis-oriented ZnO NRs were grown on Si(100) substrate. X-ray diffraction shows no significant change in crystal structure at low gamma doses from 1 to 5 kGy. As gamma irradiation doses increase to 10 kGy, the single crystalline ZnO structure converts to polycrystalline. The photoluminescence spectra also shows suppression of the near-band emission peak and the huge wide-band spectrum indicates the generation of structural defects at high gamma doses. At 1 kGy, the hydrogen sensor response was enhanced from 67% to 77% for 1% hydrogen in pure argon at a 150 °C operating temperature. However, at 10 kGy, the relative response decreases to 33.5%. High gamma irradiation causes displacement damage and defects in ZnO NRs, and as a result, degrades the sensor's performance as a result. Low gamma irradiation doses activate the ZnO NR surface through ionization, which enhances the sensor performance. The relative response of the hydrogen sensor was enhanced by ∼14.9% with respect to pristine ZnO using 1 kGy gamma ray treatment. © 2016 IOP Publishing Ltd.
Found in: ključnih besedah
Summary of found: ...ZnO, nanorods, gamma irradiation, sensor...
Keywords: ZnO, nanorods, gamma irradiation, sensor
Published: 12.01.2017; Views: 3342; Downloads: 0
.pdf Fulltext (4,60 MB)

Growth of nanostructured ZnO on wearable fabrics for functional garment
Minseo ParK, Fei Tong, Achintya Sujan, Yoonsung Chung, Minseo Park, Bruce Tatarchuk, Helen Koo, Hosang Ahn, Young Soo Yoon, Dong-Joo Kim, 2014, original scientific article

Found in: ključnih besedah
Summary of found: ...ZnO, Fabrics, Dip-pad-cure method, Nanorods, Diffuse reflectance, IV measurement...
Keywords: ZnO, Fabrics, Dip-pad-cure method, Nanorods, Diffuse reflectance, IV measurement
Published: 16.01.2017; Views: 3663; Downloads: 0
.pdf Fulltext (918,15 KB)

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