Block Copolymer Templated Fabrication and Functionalization of Nanoraod Arrays

A-B嵌段共聚物的嵌段长度在一定范围内会导致纳米相分离，并在聚合物B的基质中形成聚合物A的圆柱形微区，将在固体衬底上制备成薄膜。溶剂退火法将允许产生具有高度长程位置和取向有序性的图案。由此得到的直径和分离距离在纳米范围内(可调)且垂直于衬底表面的圆柱形磁区的规则阵列将被用作模板，用于从不同类型的材料制造纳米棒或纳米线阵列，包括(贵金属)、氧化物、半导体或导电/氧化还原活性聚合物。将采用MOCVD和湿化学方法来实现纳米棒阵列的这种生长，并对其进行评估。在这些纳米阵列所具有的一系列有趣的物理性质中，我们将重点介绍它们的光学性质(线性、非线性和集成)，重点是表面等离子体光学研究，以及用于衍射光学的结构。此外，这些阵列的高表面积将用于生成用于生物亲和力研究的结合矩阵，通过硅烷(对于二氧化硅)或硫醇(对于金、银、砷化镓)衍生化共价偶联配体(肽或寡核苷酸)。

A-B block copolymers with block lengths in the range that induces nanophase-separation with the formation of cylindrical domains of polymer A in the matrix of polymer B will be prepared as thin films on solid substrates. Solvent-annealing will allow for the generation of patterns with a high degree of long range positional and orientational order. The resulting regular arrays of cylindrical domains with (tunable) diameters and separation distances in the nanometer range, and oriented normal to the substrate surface, will be used as templates for the fabrication of arrays of nanorods or nanowires from different types of materials, including (noble) metals, oxides, semiconductors, or conducting/redox-active polymers. MOCVD and wet chemical protocols for this growth of nanorod arrays will be employed and evaluated. Of the wide range of interesting physical properties that these nano arrays have, we will focus on their optical (linear, nonlinear and integrated) properties with an emphasis on surface plasmon optical investigations, as well as on using the structures for the diffractive optics. Additionally, the high surface area of these arrays will be used to generate binding matrices for bioaffinity studies covalently coupling ligands (peptides or oligonucleotides) via silane- (for SiO2) or thiol- (for Au, Ag GaAs) derivatization.