Surface-Enhanced Raman Scattering Spectral Imaging
for the Attomolar Range Detection of Crystal Violet in Contaminated
Water
Posted on 2018-04-19 - 08:14
A series
of nanocomposites based on polyamide (NL16, PA) filter
membranes containing metal nanoparticles (NPs) have been prepared
by filtration under reduced pressure of the metal colloids. The ensuing
materials were then investigated as substrates for surface-enhanced
Raman scattering (SERS) imaging studies envisaging the spectroscopic
detection of vestigial organic pollutants dissolved in contaminated
water. The organic dye crystal violet (CV) was used here as a model
pollutant because it is a hazardous compound present in certain effluent
waters. Moreover this compound is well-known for its strong SERS activity,
which is clearly advantageous in the context of material development
for SERS. Indeed, several preparative strategies were employed to
prepare PA-based composites, and the impact on SERS detection was
investigated. These include the use of chemical and morphological
distinct plasmonic NPs (Ag, Au), a variable metal load and changing
the order of addition of the analytical specimens. These studies demonstrate
that the parameters employed in the fabrication of the SERS substrates
have a strong impact on the Raman signal enhancement. The use of Raman
imaging during the fabrication process allows establishing improvements
that translate to better performances of the substrates in the analyte
detection. The results have been interpreted by considering an integrated
set of operational parameters that include the affinity of CV molecules
to the substrate, amount and dispersion of NPs in the PA membranes,
and the detection method. Noteworthy the use of SERS analysis
assisted with Raman imaging allowed achieving a detection limit for
CV as low as 100 aM in ultrapure water and 10 fM in real samples.
CITE THIS COLLECTION
DataCite
3 Biotech
3D Printing in Medicine
3D Research
3D-Printed Materials and Systems
4OR
AAPG Bulletin
AAPS Open
AAPS PharmSciTech
Abhandlungen aus dem Mathematischen Seminar der Universität Hamburg
ABI Technik (German)
Academic Medicine
Academic Pediatrics
Academic Psychiatry
Academic Questions
Academy of Management Discoveries
Academy of Management Journal
Academy of Management Learning and Education
Academy of Management Perspectives
Academy of Management Proceedings
Academy of Management Review
Fateixa, Sara; I. S. Nogueira, Helena; Trindade, Tito (2018). Surface-Enhanced Raman Scattering Spectral Imaging
for the Attomolar Range Detection of Crystal Violet in Contaminated
Water. ACS Publications. Collection. https://doi.org/10.1021/acsomega.7b01983
or
Select your citation style and then place your mouse over the citation text to select it.
SHARE
Usage metrics
Read the peer-reviewed publication
AUTHORS (3)
SF
Sara Fateixa
HI
Helena I. S. Nogueira
TT
Tito Trindade