Dimer-on-mirror SERS substrates with attogram sensitivity fabricated by colloidal lithography
Artikel i vetenskaplig tidskrift, 2015

Nanoplasmonic substrates with optimized field-enhancement properties are a key component in the continued development of surface-enhanced Raman scattering (SERS) molecular analysis but are challenging to produce inexpensively in large scale. We used a facile and cost-effective bottom-up technique, colloidal hole-mask lithography, to produce macroscopic dimer-on-mirror gold nanostructures. The optimized structures exhibit excellent SERS performance, as exemplified by detection of 2.5 and 50 attograms of BPE, a common SERS probe, using Raman microscopy and a simple handheld device, respectively. The corresponding Raman enhancement factor is of the order 10(11), which compares favourably to previously reported record performance values.

Författare

Aron Hakonen

Chalmers, Teknisk fysik, Bionanofotonik

Mikael Svedendahl

Chalmers, Teknisk fysik, Bionanofotonik

Robin Ogier

Chalmers, Teknisk fysik, Bionanofotonik

Zhong-Jian Yang

Chalmers, Teknisk fysik, Bionanofotonik

Kristof Lodewijks

Chalmers, Teknisk fysik, Bionanofotonik

Ruggero Verre

Chalmers, Teknisk fysik, Bionanofotonik

Timur Shegai

Chalmers, Teknisk fysik, Bionanofotonik

Per-Ola Andersson

Totalförsvarets forskningsinstitut (FOI)

Mikael Käll

Chalmers, Teknisk fysik, Bionanofotonik

Nanoscale

2040-3364 (ISSN)

Vol. 7 21 9405-9410

Ämneskategorier

Kemi

DOI

10.1039/c5nr01654a

Mer information

Senast uppdaterat

2018-02-27