Optoelectronic Properties of Single-Crystalline Zn2GeO4 Nanowires

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• 作者：Chi-Hung Liao ; Chun-Wei Huang ; Jui-Yuan Chen ; Chung-Hua Chiu ; TzungChuen Tsai ; Kuo-Chang Lu ; Ming-Yen Lu ; Wen-Wei Wu
• 刊名：Journal of Physical Chemistry C
• 出版年：2014
• 出版时间：April 17, 2014
• 年：2014
• 卷：118
• 期：15
• 页码：8194-8199
• 全文大小：445K
• 年卷期：v.118,no.15(April 17, 2014)
• ISSN：1932-7455

文摘

In this work, Zn₂GeO₄ nanowires (NWs) were successfully synthesized on Si(100) substrates through carbon thermal reduction and a vapor鈥搇iquid鈥搒olid method. The NWs were of around 100 nm diameter and high aspect ratio (AR > 150). High-resolution transmission electron microscopy studies indicate that the NWs are single-crystalline with [110] growth direction. Moreover, the atomic resolution high-angle annular dark-field and bright-field images of scanning transmission electron microscopy have distinguished the different elements. They also further identified the structure of Zn₂GeO₄ and located the positions of the elements. Additionally, we have fabricated devices and measured the electrical properties of a single NW. It is remarkable that individual Zn₂GeO₄ NW devices exhibited excellent optoelectronic properties with fast switching speed under 254 nm UV illuminations. Furthermore, with short wavelength UV illumination, as we soaked Zn₂GeO₄ NWs in methyl orange solution, the methyl orange was degraded. Therefore, Zn₂GeO₄ NWs have potential applications in UV photodetectors and degradation of organic pollutants.