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Localized surface plasmon resonance and surface enhanced Raman scattering responses of Au@Ag core-shell nanorods with different thickness of Ag shell.
J Nanosci Nanotechnol. 2014 Jun; 14(6):4245-50.JN

Abstract

The properties of the localized surface plasmon resonance (LSPR) and the surface enhanced Raman scattering (SERS) of the core-shell bimetallic nanostructures, that is the monodisperse Au@Ag core-shell nanorods with different thickness of Ag shell, are theoretically and experimental researched. The UV-vis-NIR absorption spectra of the Au@Ag core-shell nanorods are measured and displayed their blue-shifts of the longitudinal plasmon resonance peaks with increasing of Ag concentrations in the colloidal solution. And the absorption spectra of the Au@Ag core-shell nanorods are simulated by the Finite Element Method (FEM), which are in agreement with the experimental measurements and reveal their LSPR mechanism as the varying structures. In addition, Rhodamine 6G, as a Raman reporter molecule, is used to investigate SERS of gold nanorods and Au@Ag core-shell nanorods. It is found that Au@Ag core-shell nanorods have better SERS responses, comparing with those of Au nanorods, and their SERS intensities are increased with the increases of the Ag shell thickness, which demonstrate that the chemisorptive bond effect and the morphology of the nanoparticle play key roles to the SERS signals. It is significant to design the biosensor based on the properties of Au@Ag core-shell nanorods.

Authors

No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

24738378

Citation

Ma, Yanan, et al. "Localized Surface Plasmon Resonance and Surface Enhanced Raman Scattering Responses of Au@Ag Core-shell Nanorods With Different Thickness of Ag Shell." Journal of Nanoscience and Nanotechnology, vol. 14, no. 6, 2014, pp. 4245-50.
Ma Y, Zhou J, Zou W, et al. Localized surface plasmon resonance and surface enhanced Raman scattering responses of Au@Ag core-shell nanorods with different thickness of Ag shell. J Nanosci Nanotechnol. 2014;14(6):4245-50.
Ma, Y., Zhou, J., Zou, W., Jia, Z., Petti, L., & Mormile, P. (2014). Localized surface plasmon resonance and surface enhanced Raman scattering responses of Au@Ag core-shell nanorods with different thickness of Ag shell. Journal of Nanoscience and Nanotechnology, 14(6), 4245-50.
Ma Y, et al. Localized Surface Plasmon Resonance and Surface Enhanced Raman Scattering Responses of Au@Ag Core-shell Nanorods With Different Thickness of Ag Shell. J Nanosci Nanotechnol. 2014;14(6):4245-50. PubMed PMID: 24738378.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Localized surface plasmon resonance and surface enhanced Raman scattering responses of Au@Ag core-shell nanorods with different thickness of Ag shell. AU - Ma,Yanan, AU - Zhou,Jun, AU - Zou,Weibo, AU - Jia,Zhenhong, AU - Petti,Lucia, AU - Mormile,Pasquale, PY - 2014/4/18/entrez PY - 2014/4/18/pubmed PY - 2014/5/9/medline SP - 4245 EP - 50 JF - Journal of nanoscience and nanotechnology JO - J Nanosci Nanotechnol VL - 14 IS - 6 N2 - The properties of the localized surface plasmon resonance (LSPR) and the surface enhanced Raman scattering (SERS) of the core-shell bimetallic nanostructures, that is the monodisperse Au@Ag core-shell nanorods with different thickness of Ag shell, are theoretically and experimental researched. The UV-vis-NIR absorption spectra of the Au@Ag core-shell nanorods are measured and displayed their blue-shifts of the longitudinal plasmon resonance peaks with increasing of Ag concentrations in the colloidal solution. And the absorption spectra of the Au@Ag core-shell nanorods are simulated by the Finite Element Method (FEM), which are in agreement with the experimental measurements and reveal their LSPR mechanism as the varying structures. In addition, Rhodamine 6G, as a Raman reporter molecule, is used to investigate SERS of gold nanorods and Au@Ag core-shell nanorods. It is found that Au@Ag core-shell nanorods have better SERS responses, comparing with those of Au nanorods, and their SERS intensities are increased with the increases of the Ag shell thickness, which demonstrate that the chemisorptive bond effect and the morphology of the nanoparticle play key roles to the SERS signals. It is significant to design the biosensor based on the properties of Au@Ag core-shell nanorods. SN - 1533-4880 UR - https://www.unboundmedicine.com/medline/citation/24738378/Localized_surface_plasmon_resonance_and_surface_enhanced_Raman_scattering_responses_of_Au@Ag_core_shell_nanorods_with_different_thickness_of_Ag_shell_ DB - PRIME DP - Unbound Medicine ER -