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Rapid and Sensitive Detection of Malachite Green and Melamine with Silver Film over Nanospheres by Surface-Enhanced Raman Scattering
- Source :
- Plasmonics. 12:1169-1175
- Publication Year :
- 2016
- Publisher :
- Springer Science and Business Media LLC, 2016.
-
Abstract
- Silver film over nanospheres (AgFON) have been prepared by depositing Ag thin film onto the self-assembled monolayer arrays of polystyrene nanospheres with vacuum magnetron sputtering method. The surface morphologies and optical properties have been characterized by using scanning electron microscope (SEM) and ultraviolet-visible near-infrared (UV-Vis-NIR) spectrophotometer. AgFON was used as substrate to detect the surface-enhanced Raman scattering (SERS) spectra of malachite green (MG) and melamine (MA). It was found that the AgFON substrate presented outstanding performance that the Raman enhancement factor was calculated to be as large as 9.76 × 1012. The minimum limit for MG was down to 10−8 mol/L with a good linear response range from 10−4 to 10−8 mol/L. In addition, this substrate showed excellent ability to recognize MA molecules with a detection limit of 0.1 mg/L. A good linearity (r = 0.9887) was obtained in the concentration range of 2–100 mg/L. Furthermore, the AgFON substrate exhibited good uniformity with a relative standard deviation (RSD) of 9.01 % and good reproducibility with RSD of 8.60 %.
- Subjects :
- Detection limit
Materials science
Scanning electron microscope
010401 analytical chemistry
Biophysics
Analytical chemistry
Substrate (chemistry)
02 engineering and technology
Sputter deposition
021001 nanoscience & nanotechnology
01 natural sciences
Biochemistry
0104 chemical sciences
symbols.namesake
chemistry.chemical_compound
chemistry
symbols
Thin film
0210 nano-technology
Raman spectroscopy
Melamine
Raman scattering
Biotechnology
Subjects
Details
- ISSN :
- 15571963 and 15571955
- Volume :
- 12
- Database :
- OpenAIRE
- Journal :
- Plasmonics
- Accession number :
- edsair.doi...........bf67c9378f26e323df9289cfa74ba6d0