SGER: Fabrication and Optimization of Highly Ordered Assemblies of Metallic Nanowire and Nanocrystal Arrays

建议编号：CTS-0642217主要研究员：Regan，Regina隶属于加州大学欧文分校Proposal标题：SGER：金属纳米线和纳米晶体阵列高度有序组装的制造和优化智力优点：通过自组装模板在硅衬底上制造特征尺寸小于10 nm且更显著的粒子间距在纳米量级的贵金属纳米结构是该提议所独有的。这项实验研究结合了界面的从头算结构计算，这些界面参与了导致纳米结构形成的相聚集。理论和实验相结合，以优化结构，并应用这些原则来获得各种结构和不同的结构中的材料。我们将讨论纳米结构的光学性质的表征，以证明将这些结构用于表面等离子体共振生物传感器的可行性。直径远小于光波长且颗粒间距较窄的金属纳米颗粒由于其周围电磁场的局部增强而具有较强的近场耦合。因此，为了最大限度地增强电磁信号，颗粒间的间距应该在纳米量级。与电子束光刻相比，自组装得到的特征尺寸为8 nm，粒子间距为~10 nm，并且吞吐量高得多。广泛的影响：提出的方法利用自组装作为一种低成本的方法来制备由贵金属纳米晶和纳米线组成的纳米结构阵列。制备大面积均匀尺寸的贵金属纳米晶体和纳米线的发展和基本认识，以及研究有效的读出方法，将促进低成本和高灵敏生物传感设备的出现，以及其他应用，如沿金属纳米线的电磁能量传输和催化。这项建议将支持在高度跨学科的科学领域对本科生和研究生进行培训。对科学和工程的兴趣和经验也将通过课程开发、计算机模拟和本科生和研究生课程中包含的这个项目的实验数据来培养。

ABSTRACTProposal Number: CTS-0642217Principal Investigator: Regan, ReginaAffiliation: University of California-IrvineProposal Title: SGER: Fabrication and Optimization of Highly Ordered Assemblies of Metallic Nanowire and Nanocrystal Arrays Intellectual Merit:The fabrication of noble metal nanostructures immobile on Si substrates via self-assembly with feature sizes less than 10 nm and more notable inter-particle spacing on the order of nanometers via a self-assembled template is unique to this proposal. This experimental study is combined with ab initio structural calculations of interfaces involved in phase aggregation that leads to nanostructure formation. Theory and experiment are combined in order to optimize structure and to apply these principles to obtain a variety of structures and vary material in the structure. Characterization of optical properties of nanostructures will be addressed to demonstrate the feasibility of using these structures in surface plasmon resonance biological sensors. Metal nanoparticles with diameters much less than the wavelength of light and narrow inter-particle spacing have strong near field coupling due to a local enhancement of the electromagnetic field around these particles. Thus, in order to achieve maximum enhancement to the electromagnetic signal, the inter-particle spacing should be on the order of nanometers. By using self-assembly, the feature size, 8 nm, and inter-particle spacing achievable, ~10 nm, is smaller than that obtained with electron beam lithography and the throughput is much higher.Broader Impacts:The approach proposed uses self-assembly as a low-cost method to fabricate nanostructure arrays composed of noble metal nanocrystals and nanowires. The development and fundamental understanding of fabricating large-areas of uniformly-sized ensembles of noble metal nanocrystals and nanowires and investigating an efficient readout method will foster the emergence of low-cost and highly sensitive biosensing devices in addition to other applications such as transport of electromagnetic energy along metallic nanowires, and catalysis. This proposal will support the training of undergraduate and graduate students in a highly interdisciplinary area of science. Interest and experience in science and engineering will also be fostered via curriculum development, computer simulations and experimental data from this project incorporated in undergraduate and graduate courses.