Highly Efficient Light-Driven TiO2–Au Janus Micromotors
Citations Over TimeTop 1% of 2015 papers
Abstract
A highly efficient light-driven photocatalytic TiO2-Au Janus micromotor with wireless steering and velocity control is described. Unlike chemically propelled micromotors which commonly require the addition of surfactants or toxic chemical fuels, the fuel-free Janus micromotor (diameter ∼1.0 μm) can be powered in pure water under an extremely low ultraviolet light intensity (2.5 × 10(-3) W/cm(2)), and with 40 × 10(-3) W/cm(2), they can reach a high speed of 25 body length/s, which is comparable to common Pt-based chemically induced self-electrophoretic Janus micromotors. The photocatalytic propulsion can be switched on and off by incident light modulation. In addition, the speed of the photocatalytic TiO2-Au Janus micromotor can be accelerated by increasing the light intensity or by adding low concentrations of chemical fuel H2O2 (i.e., 0.1%). The attractive fuel-free propulsion performance, fast movement triggering response, low light energy requirement, and precise motion control of the TiO2-Au Janus photocatalytic micromotor hold considerable promise for diverse practical applications.
Related Papers
- → Bioinspired Multifunctional Janus Particles for Droplet Manipulation(2012)186 cited
- → Sonochemical Synthesis of Magnetic Janus Nanoparticles(2010)73 cited
- Janus Particles at Interfaces(2008)
- → Recent Progresson Preparation of Amphiphilic Janus particles(2018)
- → Janus Particles and Janus Droplets(2022)