利用 Ag-TiO2 平面纳米复合薄膜对紫外/蓝光和臭氧的响应。

The Response of UV/Blue Light and Ozone Sensing Using Ag-TiO Planar Nanocomposite Thin Film.

机构信息

Department of Physics, National Chung Hsing University, Taichung 402, Taiwan.

Institute of Nanoscience, National Chung Hsing University, Taichung 402, Taiwan.

出版信息

Sensors (Basel). 2019 Nov 20;19(23):5061. doi: 10.3390/s19235061.

We successfully fabricated a planar nanocomposite film that uses a composite of silver nanoparticles and titanium dioxide film (Ag-TiO) for ultraviolet (UV) and blue light detection and application in ozone gas sensor. Ultraviolet-visible spectra revealed that silver nanoparticles have a strong surface plasmon resonance (SPR) effect. A strong redshift of the plasmonic peak when the silver nanoparticles covered the TiO thin film was observed. The value of conductivity change for the Ag-TiO composite is 4-8 times greater than that of TiO film under UV and blue light irradiation. The Ag-TiO nanocomposite film successfully sensed 100 ppb ozone. The gas response of the composite film increased by roughly six and four times under UV and blue light irradiation, respectively. We demonstrated that a Ag-TiO composite gas sensor can be used with visible light (blue). The planar composite significantly enhances photo catalysis. The composite films have practical application potential for wearable devices.

我们成功制备了一种平面纳米复合膜，该膜使用银纳米粒子和二氧化钛膜（Ag-TiO）的复合材料进行紫外线（UV）和蓝光检测，并应用于臭氧气体传感器。紫外可见光谱表明，银纳米粒子具有很强的表面等离激元共振（SPR）效应。当银纳米粒子覆盖 TiO 薄膜时，观察到等离子体峰的强红移。在 UV 和蓝光照射下，Ag-TiO 复合材料的电导率变化值是 TiO 薄膜的 4-8 倍。Ag-TiO 纳米复合膜成功地检测到了 100ppb 的臭氧。在 UV 和蓝光照射下，复合膜的气体响应分别增加了大约六倍和四倍。我们证明了 Ag-TiO 复合气体传感器可以与可见光（蓝光）一起使用。平面复合显著增强了光催化作用。复合膜在可穿戴设备方面具有实际应用潜力。