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The Effect of L-Cysteine on Surface-Enhanced Raman Scattering of Malachite Green in Silver Colloids
- Source :
- Spectroscopy Letters. 46:577-582
- Publication Year :
- 2013
- Publisher :
- Informa UK Limited, 2013.
-
Abstract
- Colloidal silver nanoparticles were prepared by a simple chemical reduction method. The effect of L-cysteine on the surface-enhanced Raman scattering activity of colloidal silver nanoparticles was investigated by using malachite green as a probe molecule. It was found that the surface-enhanced Raman scattering activity of colloidal silver nanoparticles was improved tremendously with the help of L-cysteine. The possible reasons for this enhancement effect were given. Specifically, in silver colloidal solution, no surface-enhanced Raman scattering spectrum of malachite green was observed at a relatively low concentration (≤2.5 × 10−5 mol/L). However, well-resolved and high-quality surface-enhanced Raman scattering spectra of malachite green were successfully obtained after the addition of L-cysteine to silver colloids, and the minimum detection limit for malachite green was down to 10−8 mol/L.
- Subjects :
- Detection limit
Chemistry
digestive, oral, and skin physiology
Inorganic chemistry
Nanoparticle
Photochemistry
Atomic and Molecular Physics, and Optics
Silver nanoparticle
Analytical Chemistry
symbols.namesake
Colloid
chemistry.chemical_compound
symbols
Molecule
Malachite green
Spectroscopy
Raman scattering
Cysteine
Subjects
Details
- ISSN :
- 15322289 and 00387010
- Volume :
- 46
- Database :
- OpenAIRE
- Journal :
- Spectroscopy Letters
- Accession number :
- edsair.doi...........c172942bc4590b0c15cc9ee043470bdd