Nanostructured Gold Films for SERS by Block Copolymer-Templated Galvanic Displacement Reactions

被引：131

作者：

Wang, Yong ^{[1
,2
]}

Becker, Michael ^{[1
,3
]}

Wang, Li ^{[1
]}

Liu, Jinquan ^{[1
]}

Scholz, Roland ^{[1
]}

Peng, Juan ^{[4
]}

Goesele, Ulrich ^{[1
]}

Christiansen, Silke ^{[1
,3
]}

Kim, Dong Ha ^{[5
]}

Steinhart, Martin ^{[1
,6
]}

机构：

[1] Max Planck Inst Microstruct Phys, D-06120 Halle, Germany

[2] Nanjing Univ Technol, Coll Chem & Chem Engn, State Key Lab Mat Oriented Chem Engn, Nanjing 210009, Jiangsu, Peoples R China

[3] Inst Photon Technol, D-07745 Jena, Germany

[4] Fudan Univ, Dept Macromol Sci, Minist Educ, Key Lab Mol Engn Polymers, Shanghai 200433, Peoples R China

[5] Ewha Womans Univ, Dept Chem & Nano Sci, Seoul 120750, South Korea

[6] Univ Osnabruck, Inst Chem, Osnabruck, Germany

来源：

NANO LETTERS | 2009年 / 9卷 / 06期

关键词：

SURFACE-ENHANCED RAMAN; CRYSTAL VIOLET; SCATTERING; NANOPARTICLES; SPECTROSCOPY; SPECTRA; CHEMISTRY; PYRIDINE; ROUTE;

D O I：

10.1021/nl900939y

中图分类号：

O6 [化学];

学科分类号：

0703 ;

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.

引用

页码：2384 / 2389

页数：6