Multi-Channel Optical Device for Solar-Driven Bacterial Inactivation under Real-Time Temperature Feedback

Area of Science:

• Materials Science
• Nanotechnology
• Photothermal Therapy
• Antibacterial Applications

Background:

• Solar-driven photothermal antibacterial devices offer a clean energy solution.
• Conventional materials suffer from narrow absorbance bands, limiting solar energy harvesting.
• Lack of real-time temperature monitoring leads to energy inefficiency in photothermal processes.

Purpose of the Study:

• To develop an elegant multi-channel optical device with a multilayer structure.
• To address deficient solar harvesting and energy waste in solar-driven antibacterial devices.
• To enable simultaneous solar absorbance enhancement and real-time temperature monitoring.

Main Methods:

• Fabrication of a multi-channel optical device with a multilayer structure.
• Utilized semiconductor Iridium Dioxide (IrO2) nanoaggregates in the photothermal channel for enhanced solar absorbance.
• Incorporated thermal-sensitive Erbium-doped upconversion nanoparticles in the luminescence channel for real-time temperature monitoring.

Main Results:

• Iridium Dioxide (IrO2) nanoaggregates demonstrated superior solar absorbance and photothermal conversion efficiency compared to nanoparticles.
• Real-time microscale temperature monitoring was achieved using Erbium-doped upconversion nanoparticles.
• Successful bacterial inactivation was demonstrated through the photothermal effect under solar irradiation with integrated temperature monitoring.

Conclusions:

• The developed multi-channel device effectively enhances solar harvesting and enables precise temperature control for antibacterial applications.
• This approach offers a promising strategy for energy-efficient and effective solar-driven photothermal bacterial inactivation.
• The study provides valuable insights for designing smart photothermal devices for future applications.