Hand-Held Femtogram Detection of Hazardous Picric Acid with Hydrophobic Ag Nanopillar SERS Substrates and Mechanism of Elasto-Capillarity
Journal article, 2017
Picric acid (PA) is a severe environmental and security risk due to its unstab e, 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 handheld 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.
metal-organic framework
flexible hot-spots
molecular dynamics
molecular-dynamics
enhanced raman-spectroscopy
Chemistry
picric acid
hydrophobic Ag nanopillars
2
v33
1986
6-trinitrophenol tnp
inorganic explosives
4
iles sm
sensitive detection
charged silver nanoparticles
aqueous-solution
Science & Technology - Other Topics
physical review b
p7983
elasto-capillarity
conjugated polymer
SERS
highly selective
detection
Author
Aron Hakonen
Chalmers, Physics, Bionanophotonics
F. C. Wang
University of Science and Technology of China
Per-Ola Andersson
Uppsala Universitet
Totalforsvarets forskningsinstitut
H. Wingfors
Totalforsvarets forskningsinstitut
Tomas Rindzevicius
Danmarks Tekniske Universitet
M. S. Schmidt
Danmarks Tekniske Universitet
V. R. Soma
University of Hyderabad
S. C. Xu
Dezhou University
Y. Q. Li
University of Science and Technology of China
A. Boisen
Danmarks Tekniske Universitet
H. A. Wu
University of Science and Technology of China
Acs Sensors
2379-3694 (eISSN)
Vol. 2 2 198-202Subject Categories (SSIF 2011)
Polymer Chemistry
Atom and Molecular Physics and Optics
Driving Forces
Sustainable development
DOI
10.1021/acssensors.6b00749