Dimer-on-mirror SERS substrates with attogram sensitivity fabricated by colloidal lithography
Journal article, 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.

Author

Aron Hakonen

Chalmers, Applied Physics, Bionanophotonics

Mikael Svedendahl

Chalmers, Applied Physics, Bionanophotonics

Robin Ogier

Chalmers, Applied Physics, Bionanophotonics

Zhong-Jian Yang

Chalmers, Applied Physics, Bionanophotonics

Kristof Lodewijks

Chalmers, Applied Physics, Bionanophotonics

Ruggero Verre

Chalmers, Applied Physics, Bionanophotonics

Timur Shegai

Chalmers, Applied Physics, Bionanophotonics

Per-Ola Andersson

Swedish Defence Research Agency (FOI)

Mikael Käll

Chalmers, Applied Physics, Bionanophotonics

Nanoscale

2040-3364 (ISSN)

Vol. 7 21 9405-9410

Subject Categories

Chemical Sciences

DOI

10.1039/c5nr01654a

More information

Latest update

2/27/2018