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Highly Efficient Light-Driven TiO2–Au Janus Micromotors
ACS Nano ( IF 15.8 ) Pub Date : 2015-11-30 00:00:00 , DOI: 10.1021/acsnano.5b05940 Renfeng Dong 1 , Qilu Zhang 1 , Wei Gao 2 , Allen Pei 2 , Biye Ren 1
ACS Nano ( IF 15.8 ) Pub Date : 2015-11-30 00:00:00 , DOI: 10.1021/acsnano.5b05940 Renfeng Dong 1 , Qilu Zhang 1 , Wei Gao 2 , Allen Pei 2 , Biye Ren 1
Affiliation
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/cm2), and with 40 × 10–3 W/cm2, 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.
中文翻译:
高效的光驱动TiO 2 –Au Janus微电机
描述了一种具有无线转向和速度控制的高效光驱动光催化TiO 2 -Au Janus微电机。与通常需要添加表面活性剂或有毒化学燃料的化学推进微型电动机不同,无燃料的Janus微型电动机(直径约1.0μm)可以在纯水中以极低的紫外线强度(2.5×10 –3 W / cm )供电。2),并且具有40×10 –3 W / cm 2的速度,可以达到25体长/秒的高速,这可与普通的基于Pt的化学诱导自电泳Janus微电机相媲美。可以通过入射光调制来打开和关闭光催化推进。另外,光催化TiO的速度2- Au Janus微型电动机可以通过增加光强度或添加低浓度的化学燃料H 2 O 2(即0.1%)来加速。TiO 2 –Au Janus光催化微电机具有引人注目的无燃料推进性能,快速运动触发响应,低光能要求以及精确的运动控制,在各种实际应用中都具有可观的前景。
更新日期:2015-11-30
中文翻译:
高效的光驱动TiO 2 –Au Janus微电机
描述了一种具有无线转向和速度控制的高效光驱动光催化TiO 2 -Au Janus微电机。与通常需要添加表面活性剂或有毒化学燃料的化学推进微型电动机不同,无燃料的Janus微型电动机(直径约1.0μm)可以在纯水中以极低的紫外线强度(2.5×10 –3 W / cm )供电。2),并且具有40×10 –3 W / cm 2的速度,可以达到25体长/秒的高速,这可与普通的基于Pt的化学诱导自电泳Janus微电机相媲美。可以通过入射光调制来打开和关闭光催化推进。另外,光催化TiO的速度2- Au Janus微型电动机可以通过增加光强度或添加低浓度的化学燃料H 2 O 2(即0.1%)来加速。TiO 2 –Au Janus光催化微电机具有引人注目的无燃料推进性能,快速运动触发响应,低光能要求以及精确的运动控制,在各种实际应用中都具有可观的前景。