Journal article
Hand-Held Femtogram Detection of Hazardous Picric Acid with 2 Hydrophobic Ag Nanopillar SERS Substrates and Mechanism of 3 Elasto-Capillarity
Chalmers University of Technology1
University of Science and Technology of China2
Uppsala University3
Swedish Defense Research Agency4
Department of Micro- and Nanotechnology, Technical University of Denmark5
Nanoprobes, Department of Micro- and Nanotechnology, Technical University of Denmark6
University of Hyderabad7
Dezhou University8
Center for Intelligent Drug Delivery and Sensing Using Microcontainers and Nanomechanics, Department of Health Technology, Technical University of Denmark9
Picric acid (PA) is a severe environmental and security risk due to its unstable, toxic, and explosive properties. It is also challenging to detect in trace amounts and in situ because of its highly acidic and anionic character. Here, we assess sensing of PA under nonlaboratory conditions using surface-enhanced Raman scattering (SERS) silver nanopillar substrates and hand-held Raman spectroscopy equipment.
The advancing elasto-capillarity effects are explained by molecular dynamics simulations. We obtain a SERS PA detection limit on the order of 20 ppt, corresponding attomole amounts, which together with the simple analysis methodology demonstrates that the presented approach is highly competitive for ultrasensitive analysis in the field.
| Language: | English |
|---|---|
| Publisher: | American Chemical Society (ACS) |
| Year: | 2017 |
| Pages: | 198-202 |
| ISSN: | 23793694 |
| Types: | Journal article |
| DOI: | 10.1021/acssensors.6b00749 |
| ORCIDs: | Rindzevicius, Tomas , Boisen, Anja , 0000-0003-3513-8707 , 0000-0002-5954-3881 and 0000-0001-5361-7256 |
