Dresden 2011 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 44: Nanostructures at surfaces: Dots, particles, clusters, arrays III
O 44.4: Vortrag
Mittwoch, 16. März 2011, 12:00–12:15, WIL C107
Surface Nano-Patterning in Realizing Large-Scale Ordered Arrays of Metallic Nanoshells with Controllable Structures and Properties — •Shikuan Yang1,2, Feng Xu1,2, Nina Winkler1,2, Huaping Zhao1,2, and Yong Lei1,2 — 1Institute of Materials Physics, University of Muenster — 2Center for Nanotechnology
Surface patterns of metallic nanostructure arrays play an important role in many application areas such as surface-enhanced Raman scattering sensors, lithium-ion batteries, solar cells, and optical devices. Here we present an innovative surface nano-patterning technique in our group for realizing large-scale ordered arrays of metallic spherical nanoshells with well-defined structures. Sliver nanoshell arrays are synthesized using polystyrene sphere templates by an electrophoretic process. The fabricated Ag nanoshell arrays have a high controllability of the structural parameters, including the diameter, the surface roughness, and the inter-shell spacing. And the properties of the synthesized nanoshell arrays can be controlled based on the adjustment of the structural parameters. As an example, tunable surface-enhanced Raman scattering and localized surface plasmon resonance of the nanoshell arrays are demonstrated by controlling the structural parameters. The presented surface nano-patterning technique is a general fabrication process in achieving not only metallic nanoshell arrays, but also nanoshell arrays of other materials, such as semiconductors and metallic oxides.