Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 8, Issue 25, Pages 16379-16385Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.6b02455
Keywords
Cu-doped ZnO nanorods; heterostructure; pulsed laser deposition; vapor-solid-solid mode; gas sensing; optical sensor
Funding
- National Basic Research Program of China (973 Program) [2013CB632900]
- National Natural Science Foundation of China [11104046, 21473045, 51401066]
- Fundamental Research Funds from the Central University [HIT.BRETIII.201216, HIT.BRETIII.201225, HIT.-BRE TIV.201313, PIRS OF HIT A201503]
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Novel CuO nanoparticle-capped ZnO nano rods have been produced using a pulsed laser deposition (PLD) method. These nanorods are shown to grow by a CuO-nanoparticle-assisted vapor solid solid (V-S-S) mechanism. The photoluminescence (PL) accompanying ultraviolet illumination of these capped nanorod samples shows large variations upon exposure to trace quantities of H2S gas. The present data suggest that both the Cu-doped ZnO stem and the CuO capping nanoparticle contribute to optical H2S sensing with these CuO-ZnO nanorods. This study represents the first demonstration of PL-based H2S gas sensing, at room temperature, with sub-ppm sensitivity. It also opens the way to producing CuO-ZnO nanorods by a V-S-S mechanism using gas-phase methods other than PLD.
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