Howse Jonathan R, Jones Richard A L, Ryan Anthony J, Gough Tim, Vafabakhsh Reza, Golestanian Ramin
Department of Physics and Astronomy, University of Sheffield, Sheffield S3 7RH, United Kingdom.
Phys Rev Lett. 2007 Jul 27;99(4):048102. doi: 10.1103/PhysRevLett.99.048102.
The motion of an artificial microscale swimmer that uses a chemical reaction catalyzed on its own surface to achieve autonomous propulsion is fully characterized experimentally. It is shown that at short times it has a substantial component of directed motion, with a velocity that depends on the concentration of fuel molecules. At longer times, the motion reverts to a random walk with a substantially enhanced diffusion coefficient. Our results suggest strategies for designing artificial chemotactic systems.
一种利用自身表面催化的化学反应实现自主推进的人工微尺度游泳器的运动已通过实验得到充分表征。结果表明，在短时间内它具有显著的定向运动分量，其速度取决于燃料分子的浓度。在较长时间内，运动转变为具有大幅增强扩散系数的随机游走。我们的结果为设计人工趋化系统提供了策略。
