Xue Fei, Zhang Limin, Tang Wei, Zhang Chi, Du Weiming, Wang Zhong Lin
Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences , Beijing, 100083, China.
ACS Appl Mater Interfaces. 2014 Apr 23;6(8):5955-61. doi: 10.1021/am500993p. Epub 2014 Apr 11.
In this work, we demonstrated the first study of piezotronic effect as a potential means for measuring temperature by utilizing ZnO nanowire (NW) film. The film was synthesized by the wet chemical deposition method and transferred to a flexible substrate using photoresist. The primary role of piezotronic effect over geometrical and piezoresistive effect in the as-fabricated devices has been confirmed, and piezotronic effect on charge carrier transportation under different strains is subsequently studied. In addition, we also presented that the temperature sensing capability of as-fabricated NW film based piezotronic devices can be tuned by piezopotential, which exhibits dramatically enhanced sensitivity. A theoretical model is proposed to interpret the observed behaviors of the sensor. This study provides an effective method to fabricate temperature sensors with higher performance based on piezotronic effect in the future.
在本工作中，我们展示了首次利用氧化锌纳米线（NW）薄膜将压电子效应作为一种测量温度的潜在手段的研究。该薄膜通过湿化学沉积法合成，并使用光刻胶转移到柔性基板上。已证实了在制造的器件中压电子效应相对于几何效应和压阻效应的主要作用，随后研究了不同应变下压电子效应对载流子输运的影响。此外，我们还表明，基于NW薄膜的压电子器件的温度传感能力可通过压电势进行调节，其灵敏度显著提高。提出了一个理论模型来解释传感器观察到的行为。这项研究为未来基于压电子效应制造高性能温度传感器提供了一种有效方法。
