Detection of nerve gases using surface-enhanced Raman scattering substrates with high droplet adhesion
Journal article, 2016

Threats from chemical warfare agents, commonly known as nerve gases, constitute a serious security issue of increasing global concern because of surging terrorist activity worldwide. However, nerve gases are difficult to detect using current analytical tools and outside dedicated laboratories. Here we demonstrate that surface-enhanced Raman scattering (SERS) can be used for sensitive detection of femtomol quantities of two nerve gases, VX and Tabun, using a handheld Raman device and SERS substrates consisting of flexible gold-covered Si nanopillars. The substrate surface exhibits high droplet adhesion and nanopillar clustering due to elasto-capillary forces, resulting in enrichment of target molecules in plasmonic hot-spots with high Raman enhancement. The results may pave the way for strategic life-saving SERS detection of chemical warfare agents in the field.

AGENTS

SENSITIVE TRACE ANALYSIS

SPECTROSCOPY

SENSOR

NANOPILLARS

LITHOGRAPHY

FABRICATION

SERS

SPECTRA

SUPERHYDROPHOBICITY

Author

Aron Hakonen

Chalmers, Physics, Bionanophotonics

Tomas Rindzevicius

Technical University of Denmark (DTU)

M. S. Schmidt

Technical University of Denmark (DTU)

Per-Ola Andersson

Swedish Defence Research Agency (FOI)

Lars Juhlin

Swedish Defence Research Agency (FOI)

Mikael Svedendahl

Chalmers, Physics, Bionanophotonics

A. Boisen

Technical University of Denmark (DTU)

Mikael Käll

Chalmers, Physics, Bionanophotonics

Nanoscale

2040-3364 (ISSN)

Vol. 8 3 1305-1308

Areas of Advance

Nanoscience and Nanotechnology

Materials Science

Subject Categories

Analytical Chemistry

Nano Technology

Chemical Sciences

Infrastructure

Nanofabrication Laboratory

DOI

10.1039/c5nr06524k

More information

Latest update

2/28/2018