文献类型：期刊文献

英文题名：Effect of precursor solutions on ZnO film via solution precursor plasma spray and corresponding gas sensing performances

作者：Yu, Z. X.[1];Ma, Y. Z.[2];Zhao, Y. L.[1];Huang, J. B.[3];Wang, W. Z.[3];Moliere, M.[1];Liao, H. L.[1]

机构：[1]Univ Bourgogne Franche Comte, CNRS, Lab ICB, UMR 6303, Site UTBM, F-90010 Belfort, France;[2]Anhui Univ Technol, Sch Mat Sci & Engn, Maanshan 243002, Peoples R China;[3]East China Univ Sci & Technol, Key Lab Safety Sci Pressurized Syst, Minist Educ, Sch Mech & Power Engn, Shanghai 200237, Peoples R China

年份：2017

卷号：412

起止页码：683

外文期刊名：APPLIED SURFACE SCIENCE

收录：;EI(收录号：20171603581804);WOS:【SCI-EXPANDED(收录号:WOS:000401392900076)】；

基金：The authors gratefully appreciate the support from the China Scholarship Council (Grant No. 201504490038) and the Mesocentre de calcul de Franche-Comte for providing the calculation code.

语种：英文

外文关键词：Solution precursor plasma spray; Microstructure; Crystallization; ZnO film; Wettability; First principle calculation

摘要：Solution precursor plasma spraying (SPAS) as a novel thermal spray method was employed to deposit nano-structured ZnO thin film using different formulations of the precursor solution. This article focuses on the influence of the solution composition on the preferential orientation of crystal growth, on crystal size and surface morphology of the resulting ZnO films. The trend of preferential growth along (002) lattice plane of ZnO film was studied by slow scanning X-ray diffraction using a specific coefficient P-(002). It appears that the thermal spray process promotes the buildup of ZnO films preferentially oriented along the c-axis. The shape of single particle tends to change from round shaped beads to hexagonal plates by increasing the volume ratio of ethanol in the solvent. Both cauliflower and honeycomb-like surface morphologies featuring high specific surface area and roughness were obtained through the SPPS process by varying solution composition. These ZnO films are hydrophobic with contact angle as high as 136, which is seemingly associated with micro reliefs developing high surface specific area. Then the gas sensing performances of ZnO films preferentially oriented along (002) face were tentatively predicted using the "first principle calculation method" and were compared with those of conventional films that are mainly oriented along the (101) face. The (002) face displays better hydrogen adsorption capability than the (101) face with much larger resulting changes in electrical resistance. In conclusion, the c-axis oriented ZnO films obtained through SSPS have favorable performances to be used as sensitive layer in gas sensing applications. (C) 2017 Elsevier B.V. All rights reserved.