Detection of the mycotoxin citrinin using silver substrates and Raman spectroscopy

Title
Detection of the mycotoxin citrinin using silver substrates and Raman spectroscopy
Author
주재범
Keywords
Citrinin; Mycotoxin; Silver substrates; Raman spectroscopy; Density functional theory calculations; SURFACE-ENHANCED RAMAN; PENICILLIUM-CITRINUM; BENZOIC-ACID; RICE SAMPLES; SCATTERING; CULTURES; CELLS; GOLD; TEMPERATURE; OCHRATOXIN
Issue Date
2014-01
Publisher
ELSEVIER SCIENCE BV, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
Citation
Journal of Hazardous Materials 30 January 2014, 265,Pages 89-95
Abstract
We detected a trace amount of the mycotoxin citrinin using surface-enhanced Raman scattering (SEAS) on silver nanoparticle (Ag NP) surfaces. The SERS substrate on hydrophobic Teflon films was also introduced to observe the citrinin peaks. A broad band at similar to 1382 cm(-1), which was ascribed to the symmetric carboxylate stretching mode, was observed in addition to an antisymmetric carboxylate stretching mode at similar to 1568 cm(-1) in the Raman spectra. The spectral feature indicated that citrinin would adsorb on Ag NPs via its carboxylate form. Based on density functional theory (DFT) calculations, vibrational mode analysis was performed to compare the Raman spectra of citrinin. DFT calculations also predicted that a bidentate bridge configuration through 015 and 016 atoms in citrinin would be the most stable on three Ag atoms. After treating with Ag NPs, observation of citrinin peaks was attempted in fungal cells of Penicillium citrinum. This work may provide useful insights into the direct observation of the hazardous citrinin mycotoxin using SERS by understanding its adsorption behaviors on Ag surfaces. (C) 2013 Elsevier B.V. All rights reserved.
URI
https://www.sciencedirect.com/science/article/pii/S0304389413008923http://hdl.handle.net/20.500.11754/46907
ISSN
0304-3894
DOI
10.1016/j.jhazmat.2013.11.041
Appears in Collections:
GRADUATE SCHOOL[S](대학원) > BIONANOTECHNOLOGY(바이오나노학과) > Articles
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