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A near-infrared light-responsive upconversion nanoparticle micromotor propelled by oxygen bubbles
1Department of Chemical and Biomolecular Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul, 03722, Republic of Korea. leessy@yonsei.ac.kr.
Chemical Communications (Cambridge, England)
|December 17, 2020
Summary
Researchers developed light-responsive micromotors using photosensitizer-decorated upconversion nanoparticles (UCNPs). These UCNP motors are propelled by oxygen bubbles and controlled by light intensity, pH, and chemical concentrations.
Area of Science:
- Materials Science
- Nanotechnology
- Chemical Engineering
Background:
- Upconversion nanoparticles (UCNPs) offer unique optical properties for energy conversion.
- Photosensitizer-decorated nanomaterials enable light-triggered functionalities.
- Micromotor technology is advancing for targeted applications in various fields.
Purpose of the Study:
- To design and characterize light-responsive micromotors based on photosensitizer-decorated UCNPs.
- To investigate the propulsion mechanism and control parameters of these novel micromotors.
- To demonstrate the potential of UCNP-based micromotors for controlled movement.
Main Methods:
- Decoration of upconversion nanoparticles with photosensitizers.
- Fabrication of micromotors capable of converting near-infrared light to visible emission.
- Propulsion mechanism utilizing oxygen bubble generation.
- Control experiments varying light intensity, solution pH, and reactant concentrations (H2O2, UCNPs).
Main Results:
- Successful development of light-responsive micromotors using photosensitizer-decorated UCNPs.
- Demonstrated propulsion via oxygen bubble generation triggered by visible light emission from UCNPs.
- Micromotor movement was effectively controlled by adjusting light intensity, pH, and concentrations of H2O2 and UCNPs.
Conclusions:
- Photosensitizer-decorated UCNPs can be utilized to create efficient light-responsive micromotors.
- Oxygen bubble propulsion offers a viable mechanism for UCNP-based micromotor actuation.
- The developed micromotors exhibit tunable control, paving the way for advanced applications.
