Enhanced UV-detection properties of carbon nanotube impregnated ZnO nanourchins

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• 作者：S. Safa ; ^{sda.safa@gmail.com" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Carbon nanotube ; UV-detection ; Photoresponsivity
• 刊名：Optik - International Journal for Light and Electron Optics
• 出版年：2015
• 出版时间：October 2015
• 年：2015
• 卷：126
• 期：19
• 页码：2194-2198
• 全文大小：1077 K

文摘

The bare and carbon nanotube (CNT) impregnated zinc oxide (ZnO) nano-urchins were synthesized by chemical precipitation process from a super-saturated zinc nitrate bath. The synthesized samples were characterized by scanning electron microscopy, X-ray diffractometry and Raman spectroscopy. Ultra-violet photo-detection properties of the nanostructures were studied and compared with commercial ZnO nanopowder by fabricating a metal–semiconductor–metal (MSM) array in a purpose built apparatus. Although the different applied seed for chemical precipitation (ZnO nanoparticles and Carbon nanotube) yielded same nano-urchin morphology, the size of the needles of CNT impregnated ZnO nanourchin was substantially bigger than that of bare ZnO nanourchin. By incorporation of CNTs, the fast electron/hole recombination and slow electrons mobility of the bare ZnO nanoparticles was improved and consequently led to the stronger UV detecting performance (up to 34 times photosensitivity, photoresponsivity of 2.1 A/W, signal to noise of 47.29 dB in time of response of 16 s) which proposed it as a worthwhile choice for practical applications.