Flexible and high performance ammonia sensor based on self-assembled PANI-TiO2-Au ternary composite film

Chunhua Liu; Huiling Tai; Peng Zhang; Zaizhou He; Junsheng Yu; Yadong Jiang

doi:10.1117/12.2507103

8 February 2019 Flexible and high performance ammonia sensor based on self-assembled PANI-TiO₂-Au ternary composite film

Chunhua Liu, Huiling Tai, Peng Zhang, Zaizhou He, Junsheng Yu, Yadong Jiang

Author Affiliations +

Proceedings Volume 10843, 9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optoelectronic Materials and Devices for Sensing and Imaging; 108431K (2019) https://doi.org/10.1117/12.2507103
Event: Ninth International Symposium on Advanced Optical Manufacturing and Testing Technologies (AOMATT2018), 2018, Chengdu, China

Abstract

In this work, a flexible ammonia (NH₃) sensor was prepared by depositing PANI-TiO₂-Au ternary composite film on polyimide (PI) substrate with gold interdigital electrodes through an integrated method of in situ chemical oxidation polymerization and electrostatic self-assembly technique. The morphology, structure, and chemical features of the PANI-TiO₂-Au ternary composite film were characterized by scanning electron microscopy (SEM), atomic force microscope (AFM), ultraviolet-visible absorption spectrometer (UV-Vis), and X-ray photoelectron spectroscopy (XPS). And the NH₃ response performances and flexibility of the PANI-TiO₂-Au sensor were evaluated at room temperature. results showed that the PANI-TiO₂-Au ternary composite film with hierarchical-structure was deposited on the PI successfully. And, the flexible PANI-TiO₂-Au sensor presented high response (89.7%-184.4%) and short response times (52 s-131 s) for 10-50 ppm NH₃, and it also displayed relatively stable response and ultra-low detectable concentration after 1000 bending/extending cycles, which should probably benefit from the good adhesion and flexibility of the PANI-TiO₂-Au ternary composite film. Therefore, the flexible PANI-TiO₂-Au sensor holds great promise for application into hand-held or wearable electronic devices for NH₃ detection.

Citation Download Citation

Chunhua Liu, Huiling Tai, Peng Zhang, Zaizhou He, Junsheng Yu, and Yadong Jiang "Flexible and high performance ammonia sensor based on self-assembled PANI-TiO₂-Au ternary composite film", Proc. SPIE 10843, 9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optoelectronic Materials and Devices for Sensing and Imaging, 108431K (8 February 2019); https://doi.org/10.1117/12.2507103

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