...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Advanced Functional Materials >Structure-Dependent Optical Modulation of Propulsion and Collective Behavior of Acoustic/Light-Driven Hybrid Microbowls
【24h】

Structure-Dependent Optical Modulation of Propulsion and Collective Behavior of Acoustic/Light-Driven Hybrid Microbowls

机译：声/光驱动混合微碗推进和集体行为的结构依赖性光调制。

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Hybrid light/acoustic-powered microbowl motors, composed of gold (Au) and titanium dioxide (TiO2) with a structure-dependent optical modulation of both their movement and collective behavior are reported by reversing the inner and outer positions of Au and TiO2. The microbowl propels in an acoustic field toward its exterior side. UV light activates the photochemical reaction on the TiO2 surface in the presence of hydrogen peroxide and the Au/TiO2 system moves toward its TiO2 side by self-electrophoresis. Controlling the light intensity allows switching of the dominant propulsion mode and provides braking or reversal of motion direction when TiO2 is on the interior, or accelerated motion when the TiO2 is on its exterior. Theoretical simulations offer an understanding of the acoustic streaming flow and self-electrophoretic fluid flow induced by the asymmetric distribution of ions around the microbowl. The light-modulation behavior along with the tunable structure also leads to the control of the swarm behaviors under the acoustic field, including expansion or compaction of ensembles of microbowls with interior and exterior TiO2, respectively. Such structure-dependent motion control thus paves the way for a variety of complex microscale operations, ranging from cargo transport to drug delivery in biomedical and environmental applications.
机译：通过反转Au和TiO2的内部和外部位置，报告了由金（Au）和二氧化钛（TiO2）组成的混合光/声动力微碗电动机，其运动和集体行为的结构依赖于光学调制。微碗在声场中朝其外侧推进。紫外线在过氧化氢的存在下激活了TiO2表面的光化学反应，并且Au / TiO2系统通过自电泳向其TiO2一侧移动。控制光强度允许切换主要的推进模式，并在TiO2位于内部时提供制动或运动方向的反转，或在TiO2位于其外部时提供加速的运动。理论模拟提供了对离子流在微碗周围不对称分布引起的声流和自电泳流体流的理解。光调制行为与可调结构一起还导致了对在声场下的群行为的控制，包括分别具有内部和外部TiO2的微碗组件的扩展或压缩。因此，这种与结构有关的运动控制为生物医学和环境应用中从货物运输到药物输送的各种复杂的微观操作铺平了道路。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号