论文标题
热质子气泡成核产生的强瞬变流量
Strong transient flows generated by thermoplasmonic bubble nucleation
论文作者
论文摘要
诱导和控制局部流体流以通用力驱动以及实现微流体中有效的大规模运输的挑战是开发下一代化学和生命科学的下一代小型化系统的关键。在这里，我们演示了一种方法论，可以通过在空间分离的等离激元纳米antennans上受到光激发的蒸气气泡成核驱动的极强流动瞬变的精确定量。该系统能够在水中最高100 Hz的调制速率下产生级数mm/s的峰值流速，从而允许多种高通量应用。流动动力学和流体粘度依赖性的分析表明，瞬态起源于遵循成核的快速气泡膨胀，而不是严格的热毛细血管。
The challenge of inducing and controlling localized fluid flows for generic force actuation and for achieving efficient mass transport in microfluidics is key to the development of next generation miniaturized systems for chemistry and life sciences. Here we demonstrate a methodology for the robust generation and precise quantification of extremely strong flow transients driven by vapor bubble nucleation on spatially isolated plasmonic nanoantennas excited by light. The system is capable of producing peak flow speeds of the order mm/s at modulation rates up to 100 Hz in water, thus allowing for a variety of high-throughput applications. Analysis of flow dynamics and fluid viscosity dependence indicate that the transient originates in the rapid bubble expansion that follows nucleation rather than being strictly thermocapillary in nature.
