Development of Micro/Nanoscale Thermofluid Multiple Sensing and Interface-Controlled Device

这项研究工作的重点是开发微/纳米级热流体多重传感技术，以便将微/纳米技术元素集成到接口控制设备中。这些新颖的装置可以控制不同相之间界面处/附近的热流体现象，是基于以下方面的开发而提出的：（i）具有高透气性的聚合物，（ii）聚合物的低温超精密加工和（iii）微接触印刷。速度和标量以及 zeta 电位的空间和时间分布分别通过使用共焦扫描仪的 micro-PIV/LIF 和使用倏逝波照明的 nano-PIV/LIF 获得。新的传感技术应用于所提出的装置，用于研究不同相之间界面的气体溶解和渗透性、界面静电势的形成机制以及固体表面纳米级粗糙度对电渗流的影响。

This research work focused on the development of micro/nanoscale thermofluid multiple sensing techniques in order to integrate the element of micro/nano-technologies into interface-controlled devices. The novel devices, which can control thermofluid phenomena at/near interface between different phases, were proposed based upon the development of (i) polymers that has high gas permeability, (ii) cryogenic ultra precision machining of polymers and (iii) micro contact printing. Spatial and temporal distributions of velocity and scalar quantities, and zeta-potential were obtained by micro-PIV/LIF using a confocal scanner and nano-PIV/LIF using evanescent wave illumination, respectively. The new sensing techniques were applied to the proposed devices for the investigations of gas dissolution and permeability by the interface between different phases, formation mechanism of interfacial electrostatic potential and an influence of nanoscale roughness of solid surface on electroosmotic flow.