Nonresonant surface-enhanced Raman scattering of ZnO quantum dots with Au and Ag nanoparticles.
basic_science · Level V
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- Record sourced from PubMed, PMID 23464800.
- Also identified by DOI 10.1021/nn400307a.
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Abstract
Pronounced 10(4)-fold enhancement of Raman scattering has been obtained for ZnO nanocrystals on substrates coated with 50 nm Ag nanoparticles under nonresonant excitation with a commercial red-emitting laser. This makes feasible beyond 10(-18) mole detection of ZnO nanocrystals with a commercial setup using a 0.1 mW continuous wave laser and can be purposefully used in analytical applications where conjugated nanocrystals serve as Raman markers. For Au-coated surfaces the enhancement is much lower and the heating effects in the course of Raman experiments are pronounced.
Medical subject headings
- Gold
- Metal Nanoparticles
- Quantum Dots
- Silver
- Spectrum Analysis, Raman
- Zinc Oxide