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

为了将微纳米技术的元素集成到界面控制设备中，本研究工作集中在开发微纳米尺度的热流体多重传感技术。基于(I)具有高气体渗透性的聚合物、(Ii)聚合物的低温超精密加工和(Iii)微接触印刷的发展，提出了可控制不同相间界面处/附近的热流体现象的新型装置。利用共焦扫描仪对微型PIV/LIF和利用逝去波照射的纳米PIV/LIF分别进行了速度和标量的时空分布以及Zeta电位的测量。将新的传感技术应用于研究不同相间界面的气体溶解和渗透性、界面静电势的形成机理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.