Microwave Assisted Synthesis of ZnO Nano-Sheets and Their Application in UV-Detector
Microwave Assisted Synthesis of ZnO Nano-Sheets and Their Application in UV-Detector
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DOI：
10.1149/2.023206jss
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发表时间：
2012-01-01
影响因子：
2.2
通讯作者：
Katiyar, R. S.
中科院分区：
文献类型：
--
作者：
Sahoo, Satyaprakash;Barik, Sujit K.;Katiyar, R. S.
在这里，我们报告了一个低成本的电化学水溶液法合成高品质的二维平面氧化锌纳米片使用标准家用微波炉。通过场发射扫描电子显微镜和高分辨率透射电子显微镜的独立研究证实了非常薄的石墨烯状ZnO纳米片的形成。从光致发光研究证实了片材的高质量，其显示在360 nm处存在窄且尖锐的带边发射，并且在可见光区域存在弱缺陷相关的发射峰。与黑暗条件相比，纳米片的导电性在UV光照射时显著增加。更好的晶体质量和优异的光电导性确保这些ZnO纳米片可用作潜在的紫外检测器。研究还发现，ZnO纳米片的响应和恢复时间都非常快，与纳米线和纳米棒的响应和恢复时间相当。(C)2012年电化学学会。All rights reserved.
Here we report a low cost electrochemical aqueous solution method for synthesis of high quality two dimensional flat ZnO nano-sheets using standard home use microwave-oven. Independent studies by field emission scanning electron microscopy and high resolution transmission electron microscopy confirm the formation of very thin graphene-like nanosheets of ZnO. The high quality of the sheets is confirmed from a photoluminescence study, which shows the presence of a narrow and sharp band edge emission at 360 nm and the presence of a weak defect related emission peak in the visible region. The conductivity of the nanosheets increases dramatically upon illumination of UV lights as compared to the dark condition. The better crystal quality and excellent photo conductivity ensure these ZnO nanosheets can be used as potential UV detector. It is also found that both response and recovery times of ZnO nano-sheets are very fast and are comparable to those of nanowires and nanorods. (C) 2012 The Electrochemical Society. All rights reserved.