Nanostructured gold films for SERS by block copolymer-templated galvanic displacement reactions

Yong Wang, Michael Becker, Li Wang, Jinquan Liu, Roland Scholz, Juan Peng, Ulrich Gösele, Silke Christiansen, Dong Ha Kim, Martin Steinhart

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139 引用 (Scopus)

摘要

Up to now, little effort has been made to exploit large-area high-throughput patterning by block copolymer (BCP) lithography to generate nanostructured substrates with periods well below 100 nm for surface-enhanced Raman scattering (SERS). We show that simple BCP-templated galvanic displacement reactions yield dense arrays of mushroom-shaped gold nanopillars with a period of 50 nm. The nanoporous BCP films used as templates were obtained by swelling-induced reconstruction of reverse micelle monolayers deposited on silicon wafers. Coupling of adjacent mushroom caps almost impinging on each other combined with their strong local curvature results in a high spatial density of hot spots in the narrow gaps between them. Thus, substrates characterized by high SERS efficiencies are obtained.

源语言英语
页(从-至)2384-2389
页数6
期刊Nano Letters
9
6
DOI
出版状态已出版 - 10 6月 2009

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