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Synthesis of nanograined ZnO nanowires and their enhanced gas sensing properties.
ACS Appl Mater Interfaces 2012; 4(7):3650-6AA

Abstract

Polycrystalline ZnO nanowires with grain sizes ranging from 20 to 100 nm were synthesized using a newly designed two-step process: (first step) synthesis of ZnSe nanowires by vapor transportation of a mixture of ZnSe powders; and (second step) thermal oxidation of the ZnSe nanowires at 650 °C. Compared to the single-crystal ZnO nanowire gas sensors and other nanomaterial gas sensors reported previously, the multiple networked nanowire gas sensors fabricated from the nanograined ZnO nanowires showed substantially enhanced electrical responses to NO2 gas at 300 °C. The NO2 gas sensing properties of the nanograined ZnO nanowires increased dramatically with increasing NO2 concentration. The multiple-networked nanograined ZnO nanowire sensor showed a response value of 237,263% at 10 ppm NO2 and 300 °C, whereas the single-crystal ZnO nanowire sensors showed a response of only 6.5% under the same conditions. The recovery time of the nanograined ZnO nanowire sensor was much shorter than that of the normal ZnO nanowire sensor over the NO2 concentration range of 1-10 ppm, even though the response time of the former was somewhat longer than that of the latter. The origin of the enhanced NO2 gas sensing properties of the nanograined ZnO nanowire sensor is discussed.

Authors+Show Affiliations

Department of Materials Science and Engineering, Inha University , 253 Yonghyun-dong, Nam-gu, Incheon 402-751, Republic of Korea.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

22746969

Citation

Park, Sunghoon, et al. "Synthesis of Nanograined ZnO Nanowires and Their Enhanced Gas Sensing Properties." ACS Applied Materials & Interfaces, vol. 4, no. 7, 2012, pp. 3650-6.
Park S, An S, Ko H, et al. Synthesis of nanograined ZnO nanowires and their enhanced gas sensing properties. ACS Appl Mater Interfaces. 2012;4(7):3650-6.
Park, S., An, S., Ko, H., Jin, C., & Lee, C. (2012). Synthesis of nanograined ZnO nanowires and their enhanced gas sensing properties. ACS Applied Materials & Interfaces, 4(7), pp. 3650-6. doi:10.1021/am300741r.
Park S, et al. Synthesis of Nanograined ZnO Nanowires and Their Enhanced Gas Sensing Properties. ACS Appl Mater Interfaces. 2012 Jul 25;4(7):3650-6. PubMed PMID: 22746969.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Synthesis of nanograined ZnO nanowires and their enhanced gas sensing properties. AU - Park,Sunghoon, AU - An,Soyeon, AU - Ko,Hyunsung, AU - Jin,Changhyun, AU - Lee,Chongmu, Y1 - 2012/07/12/ PY - 2012/7/4/entrez PY - 2012/7/4/pubmed PY - 2014/10/10/medline SP - 3650 EP - 6 JF - ACS applied materials & interfaces JO - ACS Appl Mater Interfaces VL - 4 IS - 7 N2 - Polycrystalline ZnO nanowires with grain sizes ranging from 20 to 100 nm were synthesized using a newly designed two-step process: (first step) synthesis of ZnSe nanowires by vapor transportation of a mixture of ZnSe powders; and (second step) thermal oxidation of the ZnSe nanowires at 650 °C. Compared to the single-crystal ZnO nanowire gas sensors and other nanomaterial gas sensors reported previously, the multiple networked nanowire gas sensors fabricated from the nanograined ZnO nanowires showed substantially enhanced electrical responses to NO2 gas at 300 °C. The NO2 gas sensing properties of the nanograined ZnO nanowires increased dramatically with increasing NO2 concentration. The multiple-networked nanograined ZnO nanowire sensor showed a response value of 237,263% at 10 ppm NO2 and 300 °C, whereas the single-crystal ZnO nanowire sensors showed a response of only 6.5% under the same conditions. The recovery time of the nanograined ZnO nanowire sensor was much shorter than that of the normal ZnO nanowire sensor over the NO2 concentration range of 1-10 ppm, even though the response time of the former was somewhat longer than that of the latter. The origin of the enhanced NO2 gas sensing properties of the nanograined ZnO nanowire sensor is discussed. SN - 1944-8252 UR - https://www.unboundmedicine.com/medline/citation/22746969/Synthesis_of_nanograined_ZnO_nanowires_and_their_enhanced_gas_sensing_properties_ L2 - https://dx.doi.org/10.1021/am300741r DB - PRIME DP - Unbound Medicine ER -