Nanofluidics of Surface-Driven Liquid Flow and Its Application for Nanofabrication

建议没有。电话：0731096首席研究员：于敏峰表面驱动液体流动的纳米流体学及其在纳米制造中的应用纳米尺度的液体传输一直是实验和理论研究的主要课题之一，因为它与纳米尺度流体动力学的基本理解有关，并且与纳米流体器件在高灵敏度化学传感和生物医学研究中的潜在应用有关。本计划采用独特的方法，利用高质量的一维纳米结构，如纳米管和纳米线，作为主动的纳米尺度液体输送，旨在研究纳米尺度液体输送的相关基本问题，并将纳米尺度液体流动应用于纳米制造。本研究的智力优势集中在研究纳米尺度下的表面驱动流动和电动液体流动，以及开发一种新型纳米加工工具：基于纳米线的电化学纳米加工系统。该研究将同时利用纳米管和纳米线的新结构特性来研究纳米流体，并将这些纳米管和纳米线集成到工程新系统中。该研究的成功执行是由PI展示的研究能力和计划的实际方法的坚实支持。设计了一种基于纳米线的液体输送系统，对纳米管或纳米线表面的表面张力驱动流动和电动流动进行了现场研究。这种受外表面限制的流动是分子薄的，并且在电动流动的情况下，完全在纳米管/电解质界面形成的双电层的强相互作用范围内。原位方法最大限度地提高了评估与纳米级外部流动复杂行为相关的各种参数的有效性，如电势、通道大小、离子浓度、液体性质、表面性质和离子类型。它还有助于有效地优化基于纳米线的电化学纳米加工系统的重要参数。计划研究的更广泛影响将基础研究与工程开发结合起来。它介绍了纳米流体研究的新方法，以解决具有挑战性的科学问题。计划中的研究有可能在纳米尺度上对液体流动的基本理解，特别是表面张力驱动的流动和电动流动，以及纳米制造技术的现状方面取得重大进展。新工具，即基于纳米线的电化学纳米制造系统，提供了在环境环境中局部制造和图像化纳米结构、纳米级互连或复杂结构组件的能力，并将在纳米制造、高密度电子封装、电路修复和纳米探针开发应用中找到关键用途。计划研究将纳米材料、材料工程、仪器仪表、电化学和纳米制造等应用相结合，为学生的积极参与和有效教育提供一个多方面的学习平台。

PROPOSAL NO.: CBET-0731096 PRINCIPAL INVESTIGATOR: YU, MIN-FENG INSTITUTION: UNIVERSITY OF ILLINOIS AT URBANA-CHAMPAIGNNANOFLUIDICS OF SURFACE-DRIVEN LIQUID FLOW AND ITS APPLICATION FOR NANOFABRICATIONLiquid transport at the nanoscale has been one of the major topics in both experimental and theoretical studies, due to its relevance to the fundamental understanding of fluid dynamics at the nanoscale, and to the potential applications in nanofluidics devices for high sensitivity chemical sensing and biomedical studies. By taking a unique approach of utilizing high quality one-dimensional nanostructure, such as nanotube and nanowire, as the active nanoscale conveyor for liquid, this planned research is aimed to study the fundamental issues related to liquid transport at the nanoscale, and to apply the nanoscale liquid flow for nanofabrication. The intellectual merits of the research focus on the study of surface driven flow and electrokinetic flow of liquid at the nanoscale and the development of a novel nanofabrication tool: a nanowire-based electrochemical nanofabrication system. The research will concurrently exploit the novel structural properties of nanotubes and nanowires to study nanofluidics and integrate such nanotubes and nanowires for engineering new systems. The successful execution of the research is solidly supported by the PI's demonstrated research capabilities and the planned practical approaches. A nanowire-based liquid delivery system will be configured for the in-situ study of the surface tension-driven flow and the electrokinetic flow confined on the external surface of nanotube or nanowire. Such external surface-confined flow is molecularly thin, and in the case of electrokinetic flow, well within the strong interaction range of electric double layer expected to form at the nanotube/electrolyte interface. The in-situ method maximizes the effectiveness of evaluating various parameters related to the complex behavior of nanoscale external flow, such as electric potential, channel size, ion concentration, liquid property, surface property and ion type. It also facilitates the efficient optimization of parameters important for the nanowire-based electrochemical nanofabrication system. The broader impact of the planned research integrates basic research with engineering development. It introduces new methodologies for nanofluidics study to solve challenging scientific problems. The planned study has the potential to result in major advancement in the fundamental understanding of liquid flow, especially the surface tension-driven flow and the electrokinetic flow, at the nanoscale, as well as the state of the art of nanofabrication technology. The new tool, namely a nanowire-based electrochemical nanofabrication system, offers the capabilities of locally fabricating and patterning nanostructure, nanoscale interconnects or complex-structured components in ambient environment, and will find critical use in nanomanufacturing, high density electronics packaging, circuit repair and nanoprobe development applications. The planned research combines the applications of nanomaterials, materials engineering, instrumentation, electrochemistry and nanofabrication, and provides a multifaceted learning platform for the active participation and effective education of students.