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

Title
Nanostructured gold films for SERS by block copolymer-templated galvanic displacement reactions
Authors
Wang Y.Becker M.Wang L.Liu J.Scholz R.Peng J.Gosele U.Christiansen S.Kim D.H.Steinhart M.
Ewha Authors
김동하
SCOPUS Author ID
김동하scopus
Issue Date
2009
Journal Title
Nano Letters
ISSN
1530-6984JCR Link
Citation
vol. 9, no. 6, pp. 2384 - 2389
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
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. © 2009 American Chemical Society.
DOI
10.1021/nl900939y
Appears in Collections:
자연과학대학 > 화학·나노과학전공 > Journal papers
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