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Journal Article

Multi-channel optical device for solar-driven bacterial inactivation under real-time temperature feedback


Liu,  Yuxin
Felix Löffler, Biomolekulare Systeme, Max Planck Institute of Colloids and Interfaces, Max Planck Society;

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Liao, X., Liu, Y., Jia, Q., & Zhou, J. (2021). Multi-channel optical device for solar-driven bacterial inactivation under real-time temperature feedback. Chemistry – A European Journal, 27(43), 11094-11101. doi:10.1002/chem.202101458.

Cite as: http://hdl.handle.net/21.11116/0000-0008-EE39-D
Solar-driven photothermal antibacterial devices have attracted a lot of interest due to the fact that solar energy is one of the cleanest sources of energy in the world. However, conventional materials have a narrow absorbance band, resulting in deficient solar harvesting. In addition, lack of knowledge on temperature change in these devices during the photothermal process has also led to a waste of energy. Here, we presented an elegant multi-channel optical device with a multilayer structure to simultaneously address the above-mentioned issues in solar-driven antibacterial devices. In the photothermal channel, semiconductor IrO2-nanoaggregates exhibited higher solar absorbance and photothermal conversion efficiency compared with nanoparticles. In the luminescence channel, thermal-sensitive Er-doped upconversion nanoparticles were utilized to reflect the microscale temperature in real-time. The bacteria were successfully inactivated during the photothermal effect under solar irradiation with temperature monitoring. This study could provide valuable insight for the development of smart photothermal devices for solar-driven photothermal bacterial inactivation in the future.