P2NG.30 - Graphene-Based Biosensors for Diagnostics
- 17th International Meeting on Chemical Sensors - IMCS 2018
2018-07-15 - 2018-07-19
- P-2 - Nanomaterials for Gas Sensing
- A. Chizhov, A. Marikutsa, M. Rumyantseva - Lomonosov Moscow State University, Moscow (Russia), M. Batuk - University of Antwerp, Antwerpen (Belgium)
- 901 - 902
It this work were synthesized nanocomposites based on nanocrystalline ZnO thick films and colloidal perovskite CsPbBr3 nanocubes (NCs), and the sensor measurements were performed to NO2, SO2 and H2S at room temperature under periodically blue light illumination (LED with λmax=470 nm). The crystal structure of ZnO and CsPbBr3 was determined by X-ray diffraction, the absorption and photoluminescence spectra of CsPbBr3 colloidal NCs were obtained in UV-vis range. The morphology and size of nanocrystals were defined by HAADF-TEM investigations. ZnO/CsPbBr3 nanocomposite shows increasing of conductance under blue LED illumination, what can be explain by photosensitizing action of CsPbBr3 NCs. The level of photoconductance depends reversible on NO2 and SO2 concentration in air, but the sensor response to H2S is non-reversible. Investigated nanocomposites have a good stability during the measurements and photoconductance very slowly depends on O2 concentration.