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• W3108636927 abstract "In this work, we apply surface-enhanced Raman spectroscopy (SERS) to study the kinetics of chromium Cr (III) detection in solution using EDTA and silver nanoparticles (AgNPs). We examine for the first time the effect of pH and nanoparticles’ capping agent on the kinetic mechanism of Cr (III) detection using SERS temporal variations. The full width at half maximum (FWHM) and Raman shift variations show that the mechanism of detection is composed of two steps: a first one consisting of chemical coordination between Cr (III) and AgNPs that leads to exalted chemical and electromagnetic enhancement and the second one is an aggregation process with an important optical enhancement. The obtained results showed that the first step in the detection at lower pH was five times faster than in a basic medium using citrate capped silver nanoparticles (Cit-AgNPs). On the other hand, using a capping agent with dicarboxylate groups such as oxalate (Oxa-AgNPs) led to an important enhancement in SERS detection signal (more than 30 times) compared with Cit-AgNPs, although the detection kinetic’s mechanism was slower." @default.
• W3108636927 created "2020-12-07" @default.
• W3108636927 creator A5011912021 @default.
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• W3108636927 date "2020-11-27" @default.
• W3108636927 modified "2023-09-23" @default.
• W3108636927 title "Effect of pH and Nanoparticle Capping Agents on Cr (III) Monitoring in Water: A Kinetic Way to Control the Parameters of Ultrasensitive Environmental Detectors" @default.
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• W3108636927 doi "https://doi.org/10.3390/mi11121045" @default.
• W3108636927 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/7760521" @default.
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