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Surface‐enhanced Raman scattering as a tool to study cationic surfactants exhibiting low critical micelle concentration
Author(s) -
Mathioudakis George N.,
Soto Beobide Amaia,
Bokias Georgios,
Koutsoukos Petros G.,
Voyiatzis George A.
Publication year - 2020
Publication title -
journal of raman spectroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.748
H-Index - 110
eISSN - 1097-4555
pISSN - 0377-0486
DOI - 10.1002/jrs.5798
Subject(s) - cationic polymerization , raman scattering , critical micelle concentration , micelle , raman spectroscopy , bromide , chemistry , analytical chemistry (journal) , fluorescence , silver nanoparticle , chemical engineering , molecule , nanoparticle , materials science , inorganic chemistry , chromatography , nanotechnology , organic chemistry , optics , aqueous solution , physics , engineering
The collection of surface‐enhanced Raman scattering (SERS) by silver nanocolloids was used to identify the critical micelle concentration (CMC) of three cationic surfactants in 0.5‐M NaCl solutions: hexadecyltrimethylammonium bromide, dodecyltrimethylammonium bromide, and benzalkonium chloride. Despite structural similarity between the three test surfactans, differences of the shape and size of the respective micelles affected the corresponding SERS signals. The CMC values determined by this method agreed with the respective values measured by conventional methods, including fluorescence probing and electrical conductivity measurements. The potential for the application of SERS technique for low CMC determination without surface modification of silver nanoparticles by a Raman‐active molecule was also demonstrated.