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

本研究的重点是开发微/纳米尺度的热流体多重传感技术，以便将微/纳米技术的元素集成到界面控制器件中。基于高透气性聚合物、聚合物低温超精密加工和微接触印刷的发展，提出了能够控制不同相界面/附近热流体现象的新型装置。用共聚焦扫描的微piv /LIF和用倏逝波照明的纳米piv /LIF分别获得了速度、标量量和ζ电位的时空分布。将这些传感技术应用于所设计的装置中，研究了气体在不同相界面上的溶解和渗透性、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透流动的影响。

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.