自下而上构筑基于高分子单晶的多功能纳米马达

Bottom-up assembly of polymer-based multifunctional nanomotor

以聚己内酯和纳米粒子作为基本构筑基元,利用自下而上式的自组装方法,可以构造出基于高分子单晶的具有多种功能的纳米马达.通过此种构造方法可以精确控制马达的形状、结构以及尺寸,而且通过引入不同的功能分子或纳米粒子可以实现多种功能.这种复合纳米马达由铂催化过氧化氢产生氧气提供动力,可以在溶液中自主运动,并由磁场控制其运动方向.药物运输、可控缓释、检测等多种功能也可以一步集成到马达当中.此种构筑方法不依赖于昂贵的仪器,可以实现马达的大批量生产,具有较好的应用前景.

Multifunctional nanomotors have been fabricated through the bottom-up assembly technique using polymers and nanoparticles as the basic building blocks. The shapes, structures and sizes of the resulting nanomotors can be tailored in a controllable fashion. The nanomotors can possess multiple properties through the incorporation of various molecules or nanoparticles. The nanomotors exhibit the autonomous movement based on the platinum and hydrogen peroxide catalytic reactions as well as the directed motion under the influence of an external magnetic field. In addition, a variety of functions （ranging from cargo transportation, sustained release to sensing） have been integrated into these nanomotors. Furthermore, since the fabrication of the current nanomotors does not rely on expensive equipment and is mass-producible, the multiftmctional nanomotors are believed to have potential applications in various fields.