Synthesis of ZnO tetrapods for flexible and transparent UV sensors

被引:45
作者
Rackauskas, Simas [1 ]
Mustonen, Kimmo [1 ]
Jarvinen, Terhi [1 ]
Mattila, Marco [2 ]
Klimova, Olga [3 ]
Jiang, Hua [1 ]
Tolochko, Oleg [3 ]
Lipsanen, Harri [2 ]
Kauppinen, Esko I. [1 ]
Nasibulin, Albert G. [1 ]
机构
[1] Aalto Univ, NanoMat Grp, Dept Appl Phys, Espoo 00076, Finland
[2] Aalto Univ, Dept Micro & Nanosci, Espoo 02150, Finland
[3] St Petersburg State Polytech Univ, Mat Sci Fac, St Petersburg 195251, Russia
基金
芬兰科学院;
关键词
OPTICAL-PROPERTIES; NANOCRYSTALS; NANOSTRUCTURES; GROWTH; NANOWIRES; MECHANISM; NANOTETRAPODS; MORPHOLOGIES; KINETICS;
D O I
10.1088/0957-4484/23/9/095502
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
ZnO tetrapods (ZnO-Ts) were synthesized in a vertical flow reactor by gas phase oxidation of Zn vapor in an air atmosphere. The morphology of the product was varied from nearly spherical nanoparticles to ZnO-Ts, together with the partial pressure of Zn and reaction temperature. MgO introduced during synthesis, increased the band gap, the optical transparency in the visible range, and also changed the ZnO-T structure. Fabricated flexible transparent UV sensors showed a 45-fold current increase under UV irradiation with an intensity of 30 mu W cm(-2) at a wavelength of 365 nm and response time of 0.9 s.
引用
收藏
页数:7
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