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Effect of Au and Au@Ag core-shell nanoparticles on the SERS of bridging organic molecules.
J Colloid Interface Sci. 2010 Nov 01; 351(1):35-42.JC

Abstract

Gold nanoparticles (AuNPs) with about 6 nm size were produced and stabilized with mercaptopropionic acid (MPA) film to produce a monolayer protected cluster (MPC) of AuS(CH(2))(2)COOH. 4-Aminothiophenol (ATP) molecules were introduced to the activated carboxylic acid ends of the film surrounding the AuNPs to produce AuS(CH(2))(2)CONHPhSH MPC. These modified AuNPs were again self-assembled with Au@Ag core-shell bimetallic nanoparticles via the -SH groups to produce an organic bridge between Au and Au@Ag metallic nanoparticles. An unusually strong enhancement of the Raman signals was observed and assigned to the plasmon coupling between the AuNPs and Au@Ag NPs bridged assembly. Formation of AuS(CH(2))(2)COOH and AuS(CH(2))(2)CONHPhSH clusters and AuS(CH(2))(2)CONHPhS(Au@Ag) assembly is confirmed by UV-Vis, reflection-absorption IR spectroscopy (RAIRS) and X-ray photoelectron spectroscopy (XPS), as well as by TEM analysis. The SERS activity of the AuNPs and Au@Ag NPs was tested using the HS(CH(2))(2)CONHPhSH molecule as a probe to compare the effectiveness of monometallic and bimetallic systems. SERS spectra show that Au@Ag bimetallic nanoparticles are very effective SERS-active substrates.

Authors+Show Affiliations

Dicle University, Faculty of Arts and Sciences, Dept. of Chemistry, Diyarbakir, Turkey.No affiliation info availableNo 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

20701922

Citation

Güzel, Remziye, et al. "Effect of Au and Au@Ag Core-shell Nanoparticles On the SERS of Bridging Organic Molecules." Journal of Colloid and Interface Science, vol. 351, no. 1, 2010, pp. 35-42.
Güzel R, Ustündağ Z, Ekşi H, et al. Effect of Au and Au@Ag core-shell nanoparticles on the SERS of bridging organic molecules. J Colloid Interface Sci. 2010;351(1):35-42.
Güzel, R., Ustündağ, Z., Ekşi, H., Keskin, S., Taner, B., Durgun, Z. G., Turan, A. A., & Solak, A. O. (2010). Effect of Au and Au@Ag core-shell nanoparticles on the SERS of bridging organic molecules. Journal of Colloid and Interface Science, 351(1), 35-42. https://doi.org/10.1016/j.jcis.2010.07.039
Güzel R, et al. Effect of Au and Au@Ag Core-shell Nanoparticles On the SERS of Bridging Organic Molecules. J Colloid Interface Sci. 2010 Nov 1;351(1):35-42. PubMed PMID: 20701922.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Effect of Au and Au@Ag core-shell nanoparticles on the SERS of bridging organic molecules. AU - Güzel,Remziye, AU - Ustündağ,Zafer, AU - Ekşi,Haslet, AU - Keskin,Selda, AU - Taner,Bilge, AU - Durgun,Zeynep Gülşah, AU - Turan,Aybüke A Isbir, AU - Solak,Ali Osman, Y1 - 2010/07/21/ PY - 2010/04/02/received PY - 2010/07/10/revised PY - 2010/07/14/accepted PY - 2010/8/13/entrez PY - 2010/8/13/pubmed PY - 2010/12/25/medline SP - 35 EP - 42 JF - Journal of colloid and interface science JO - J Colloid Interface Sci VL - 351 IS - 1 N2 - Gold nanoparticles (AuNPs) with about 6 nm size were produced and stabilized with mercaptopropionic acid (MPA) film to produce a monolayer protected cluster (MPC) of AuS(CH(2))(2)COOH. 4-Aminothiophenol (ATP) molecules were introduced to the activated carboxylic acid ends of the film surrounding the AuNPs to produce AuS(CH(2))(2)CONHPhSH MPC. These modified AuNPs were again self-assembled with Au@Ag core-shell bimetallic nanoparticles via the -SH groups to produce an organic bridge between Au and Au@Ag metallic nanoparticles. An unusually strong enhancement of the Raman signals was observed and assigned to the plasmon coupling between the AuNPs and Au@Ag NPs bridged assembly. Formation of AuS(CH(2))(2)COOH and AuS(CH(2))(2)CONHPhSH clusters and AuS(CH(2))(2)CONHPhS(Au@Ag) assembly is confirmed by UV-Vis, reflection-absorption IR spectroscopy (RAIRS) and X-ray photoelectron spectroscopy (XPS), as well as by TEM analysis. The SERS activity of the AuNPs and Au@Ag NPs was tested using the HS(CH(2))(2)CONHPhSH molecule as a probe to compare the effectiveness of monometallic and bimetallic systems. SERS spectra show that Au@Ag bimetallic nanoparticles are very effective SERS-active substrates. SN - 1095-7103 UR - https://www.unboundmedicine.com/medline/citation/20701922/Effect_of_Au_and_Au@Ag_core_shell_nanoparticles_on_the_SERS_of_bridging_organic_molecules_ DB - PRIME DP - Unbound Medicine ER -