Author: Mathias M Schubert
Requested Type: Pre-Selected Invited
Submitted: 2015-03-29 14:47:26
University of Nebraska-Lincoln
Lincoln, Nebraska 68588-0
Coherently ordered nanostructures establish a new class of surfaces, created by a regular arrangement of congruent, three-dimensional-shaped nanostructures. Shape, size, and relative position of the nanostructures allow limitless combinations. Size and relative position can be varied from nanometer to micrometer regions. Shapes can be formed from many simple structures, for example through columnar growth with convex or concave equilateral, cyclic or equiangular cross sections, or through directed-self-assembly of three dimensional objects with defined geometries. New properties emerge from a very large surface area, the nearness and regularity of spatially arranged matter, which affect chemical and biochemical processes. Adjacent nanostructures, and the opportunity to combine such surfaces with additional functional modifications, offer a new field of research with the potential to understand and control molecular interactions at the nanoscale. I will discuss the extremely anisotropic optical properties and how these can be determined by generalized ellipsometry and generalized effective medium approximations, and how these materials have enabled the creation of new sensing and separation techniques for molecular interactions at the surfaces and interfaces, birefringence microscopy and imaging chromatography. I will discuss exemplary applications to imaging molecular interactions and living cells, and fluidic separations.