Institute for Advanced Study, Shenzhen University, Nanhai Avenue 3688, Nanshan District, Shenzhen, 518060, China.
Soft Matter. 2018 Sep 11;14(35):7119-7125. doi: 10.1039/c8sm00832a.
Colloidal particles with asymmetric catalytic activities are emerging micro/nanomotors that harvest chemical energy for propulsion in fluids. It is of general interest to produce such particles with high performance, in large quantity and at low cost. In this paper, we present a facile bulk method to synthesize silver-head colloidal silica rods. These particles self-propel towards their active sites by reacting with hydrogen peroxide, and the velocity is tuned via the fuel concentration. We show that these motors are highly efficient; compared to the currently available chemical-phoretic micro/nanomotors they show similar performance of self-propulsion at fuel concentrations that are two orders of magnitude smaller.
具有不对称催化活性的胶体颗粒是新兴的微/纳米马达，它们可以在流体中收集化学能量来推进。以高性能、大批量和低成本生产此类颗粒是普遍关注的问题。在本文中，我们提出了一种简便的批量方法来合成银头胶体二氧化硅棒。这些颗粒通过与过氧化氢反应，朝着它们的活性部位自推进，并且通过燃料浓度来调节速度。我们表明，这些马达的效率非常高；与目前可用的化学趋动微/纳米马达相比，它们在燃料浓度低两个数量级的情况下表现出相似的自推进性能。
