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Synthesis and characterization of surface-enhanced Raman scattering tags with Ag/SiO2 core-shell nanostructures using reverse micelle technology.
J Colloid Interface Sci. 2006 Jun 15; 298(2):752-6.JC

Abstract

A novel simplified method for synthesis of surface-enhanced Raman scattering tags has been reported. This synthesis method is based on reverse micelle technique using Igepal CO-520 as a surfactant and the mixed solution of silver nitrate and rhodamine dyes with isothiocyanate group as water pool followed by hydrazine hydrate reduction and TEOS polymerization leading to the formation of silica layer surrounding the silver core. Compared to the method reported in literature, the proposed methodology eliminates the necessity of vitrophilic pretreatment and makes it possible to complete all different processes including the preparation of silver nanoparticles, the conjugation of dye molecules and the formation of silica shell in the microreactor. The nanoparticle-based surface-enhanced Raman tags obtained are composed of silver core conjugated with rhodamine dyes and an encasing silica shell. Both the dyes themselves and the Ag/SiO2 core-shell nanoparticles without the encapsulation of dyes exhibit no Raman signals. However, the Ag/SiO2 core-shell nanoparticles exhibit strong Raman signals when encapsulated with these dyes. This is due to the appearance of fluorescence quenching and surface-enhanced Raman scattering effect resulting from the conjugation of dyes and silver core. The Raman tags were characterized using transmission electron microscopy (TEM), UV-visible absorption spectrometry, and Raman spectrometry.

Authors+Show Affiliations

State Key Laboratory for Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, PR China.No 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

16457836

Citation

Gong, Ji-Lai, et al. "Synthesis and Characterization of Surface-enhanced Raman Scattering Tags With Ag/SiO2 Core-shell Nanostructures Using Reverse Micelle Technology." Journal of Colloid and Interface Science, vol. 298, no. 2, 2006, pp. 752-6.
Gong JL, Jiang JH, Liang Y, et al. Synthesis and characterization of surface-enhanced Raman scattering tags with Ag/SiO2 core-shell nanostructures using reverse micelle technology. J Colloid Interface Sci. 2006;298(2):752-6.
Gong, J. L., Jiang, J. H., Liang, Y., Shen, G. L., & Yu, R. Q. (2006). Synthesis and characterization of surface-enhanced Raman scattering tags with Ag/SiO2 core-shell nanostructures using reverse micelle technology. Journal of Colloid and Interface Science, 298(2), 752-6.
Gong JL, et al. Synthesis and Characterization of Surface-enhanced Raman Scattering Tags With Ag/SiO2 Core-shell Nanostructures Using Reverse Micelle Technology. J Colloid Interface Sci. 2006 Jun 15;298(2):752-6. PubMed PMID: 16457836.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Synthesis and characterization of surface-enhanced Raman scattering tags with Ag/SiO2 core-shell nanostructures using reverse micelle technology. AU - Gong,Ji-Lai, AU - Jiang,Jian-Hui, AU - Liang,Yi, AU - Shen,Guo-Li, AU - Yu,Ru-Qin, Y1 - 2006/02/02/ PY - 2005/11/25/received PY - 2006/01/07/revised PY - 2006/01/16/accepted PY - 2006/2/7/pubmed PY - 2007/7/27/medline PY - 2006/2/7/entrez SP - 752 EP - 6 JF - Journal of colloid and interface science JO - J Colloid Interface Sci VL - 298 IS - 2 N2 - A novel simplified method for synthesis of surface-enhanced Raman scattering tags has been reported. This synthesis method is based on reverse micelle technique using Igepal CO-520 as a surfactant and the mixed solution of silver nitrate and rhodamine dyes with isothiocyanate group as water pool followed by hydrazine hydrate reduction and TEOS polymerization leading to the formation of silica layer surrounding the silver core. Compared to the method reported in literature, the proposed methodology eliminates the necessity of vitrophilic pretreatment and makes it possible to complete all different processes including the preparation of silver nanoparticles, the conjugation of dye molecules and the formation of silica shell in the microreactor. The nanoparticle-based surface-enhanced Raman tags obtained are composed of silver core conjugated with rhodamine dyes and an encasing silica shell. Both the dyes themselves and the Ag/SiO2 core-shell nanoparticles without the encapsulation of dyes exhibit no Raman signals. However, the Ag/SiO2 core-shell nanoparticles exhibit strong Raman signals when encapsulated with these dyes. This is due to the appearance of fluorescence quenching and surface-enhanced Raman scattering effect resulting from the conjugation of dyes and silver core. The Raman tags were characterized using transmission electron microscopy (TEM), UV-visible absorption spectrometry, and Raman spectrometry. SN - 0021-9797 UR - https://www.unboundmedicine.com/medline/citation/16457836/Synthesis_and_characterization_of_surface_enhanced_Raman_scattering_tags_with_Ag/SiO2_core_shell_nanostructures_using_reverse_micelle_technology_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0021-9797(06)00030-0 DB - PRIME DP - Unbound Medicine ER -