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WFRF:(Hieu Nguyen Van)
 

Sökning: WFRF:(Hieu Nguyen Van) > (2015-2019) > On-chip growth of p...

LIBRIS Formathandbok  (Information om MARC21)
FältnamnIndikatorerMetadata
00003472naa a2200361 4500
001oai:DiVA.org:uu-320156
003SwePub
008170416s2017 | |||||||||||000 ||eng|
0247 a https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-3201562 URI
0247 a https://doi.org/10.1016/j.ijhydene.2017.05.1352 DOI
040 a (SwePub)uu
041 a engb eng
042 9 SwePub
072 7a ref2 swepub-contenttype
072 7a art2 swepub-publicationtype
1001 a Jiao, Mingzhiu Uppsala universitet,Mikrosystemteknik4 aut0 (Swepub:uu)minji258
2451 0a On-chip growth of patterned ZnO nanorod sensors with PdO decoration for enhancement of hydrogen-sensing performance
264 1b Elsevier BV,c 2017
338 a print2 rdacarrier
520 a In this study, we used a low-temperature hydrothermal technique to fabricate arrays of sensors with ZnO nanorods grown on-chip. The sensors on the glass substrate then were sputter decorated with Pd at thicknesses of 2, 4, and 8 nm and annealed at 650 °C in air for an hour. Scanning electron microscopy, high resolution transmission microscopy, X-ray diffraction, and surface analysis by X-ray photoelectron spectroscopy characterization demonstrated that decoration of homogenous PdO nanoparticles on the surface of ZnO nanorods had been achieved. The sensors were tested against three reducing gases, namely hydrogen, ethanol, and ammonia, at 350, 400, and 450 °C. The ZnO nanorods decorated with PdO particles from the 2 and 4 nm layers showed the highest responses to H2 at 450 and 350 °C, respectively. These samples also generally exhibited better selectivity for hydrogen than for ethanol and ammonia at the same concentrations and at all tested temperatures. However, the ZnO nanorods decorated with PdO particles from the 8 nm layer showed a reverse sensing behaviour compared with the first two. The sensing mechanism behind these phenomena is discussed in the light of the spillover effect of hydrogen in contact with the PdO particles as well as the negative competition of the PdO thin film formed between the sensor electrodes during sputter decoration, Pd-Zn heterojunction that forms at high temperature and thus influences the conductivity of the ZnO nanorods.
650 7a TEKNIK OCH TEKNOLOGIERx Materialteknikx Annan materialteknik0 (SwePub)205992 hsv//swe
650 7a ENGINEERING AND TECHNOLOGYx Materials Engineeringx Other Materials Engineering0 (SwePub)205992 hsv//eng
653 a Hydrogen-sensing at high temperature; On-chip hydrothermal growth; ZnO nanorods; Sputter-decoration; PdO nanoparticles
7001 a Nguyen, Van Duyu Hanoi Univ Sci & Technol, ITIMS, Hanoi, Vietnam4 aut
7001 a Nguyen, Viet Chienu Hanoi Univ Sci & Technol, ITIMS, Hanoi, Vietnam4 aut
7001 a Nguyen, Duc Hoau Hanoi Univ Sci & Technol, ITIMS, Hanoi, Vietnam4 aut
7001 a Nguyen, Van Hieuu Hanoi Univ Sci & Technol, ITIMS, Hanoi, Vietnam4 aut
7001 a Hjort, Klas,d 1964-u Uppsala universitet,Mikrosystemteknik4 aut0 (Swepub:uu)klashjor
7001 a Nguyen, Hugo,d 1955-u Uppsala universitet,Mikrosystemteknik4 aut0 (Swepub:uu)hugonguy
7102 a Uppsala universitetb Mikrosystemteknik4 org
7730 t International journal of hydrogen energyd : Elsevier BVg 42:25, s. 16294-16304q 42:25<16294-16304x 0360-3199x 1879-3487
8564 8u https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-320156
8564 8u https://doi.org/10.1016/j.ijhydene.2017.05.135

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