Hand-Held Femtogram Detection of Hazardous Picric Acid with Hydrophobic Ag Nanopillar SERS Substrates and Mechanism of Elasto-Capillarity
Artikel i vetenskaplig tidskrift, 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.

aqueous-solution

p7983

elasto-capillarity

molecular-dynamics

hydrophobic Ag nanopillars

molecular dynamics

1986

6-trinitrophenol tnp

metal-organic framework

enhanced raman-spectroscopy

conjugated polymer

charged silver nanoparticles

SERS

sensitive detection

highly selective

inorganic explosives

Science & Technology - Other Topics

4

v33

picric acid

detection

flexible hot-spots

2

physical review b

Chemistry

iles sm

Författare

Aron Hakonen

Chalmers, Fysik, Bionanofotonik

F. C. Wang

University of Science and Technology of China

Per-Ola Andersson

Totalförsvarets forskningsinstitut (FOI)

Uppsala universitet

H. Wingfors

Totalförsvarets forskningsinstitut (FOI)

Tomas Rindzevicius

Danmarks Tekniske Universitet (DTU)

M. S. Schmidt

Danmarks Tekniske Universitet (DTU)

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 (DTU)

H. A. Wu

University of Science and Technology of China

Acs Sensors

2379-3694 (eISSN)

Vol. 2 2 198-202

Ämneskategorier

Polymerkemi

Atom- och molekylfysik och optik

Drivkrafter

Hållbar utveckling

DOI

10.1021/acssensors.6b00749