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Self-assembled Au nanoparticles as substrates for surface-enhanced vibrational spectroscopy: optimization and electrochemical stability.
Chemphyschem. 2008 Sep 15; 9(13):1899-907.C

Abstract

Three-dimensional nanostructured metallic substrates for enhanced vibrational spectroscopy are fabricated by self-assembly. Nanostructures consisting of one to 20 depositions of 13 nm-diameter Au nanoparticles (NPs) on Au films are prepared and characterized by means of AFM and UV/Vis reflection-absorption spectroscopy. Surface-enhanced polarization modulation infrared reflection-absorption spectroscopy (PM-IRRAS) is observed from Au NPs modified by the probe molecule 4-hydroxythiophenol. The limitation of this kind of substrate for surface-enhanced PM-IRRAS is discussed. The surface-enhanced Raman scattering (SERS) from the same probe molecule is also observed and the effect of the number of Au-NP depositions on the SERS efficiency is studied. The SERS signal from the probe molecule maximizes after 11 Au-NP depositions, and the absolute SERS intensities from different batches are reproducible within 20%. In situ electrochemical SERS measurements show that these substrates are stable within the potential window between -800 and +200 mV (vs. Ag/AgCl/sat. Cl(-)).

Authors+Show Affiliations

Department of Chemistry, University of Victoria, Victoria, BC, V8W 3V6, Canada.No affiliation info available

Pub Type(s)

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

Language

eng

PubMed ID

18704901

Citation

Fan, Meikun, and Alexandre G. Brolo. "Self-assembled Au Nanoparticles as Substrates for Surface-enhanced Vibrational Spectroscopy: Optimization and Electrochemical Stability." Chemphyschem : a European Journal of Chemical Physics and Physical Chemistry, vol. 9, no. 13, 2008, pp. 1899-907.
Fan M, Brolo AG. Self-assembled Au nanoparticles as substrates for surface-enhanced vibrational spectroscopy: optimization and electrochemical stability. Chemphyschem. 2008;9(13):1899-907.
Fan, M., & Brolo, A. G. (2008). Self-assembled Au nanoparticles as substrates for surface-enhanced vibrational spectroscopy: optimization and electrochemical stability. Chemphyschem : a European Journal of Chemical Physics and Physical Chemistry, 9(13), 1899-907. https://doi.org/10.1002/cphc.200800099
Fan M, Brolo AG. Self-assembled Au Nanoparticles as Substrates for Surface-enhanced Vibrational Spectroscopy: Optimization and Electrochemical Stability. Chemphyschem. 2008 Sep 15;9(13):1899-907. PubMed PMID: 18704901.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Self-assembled Au nanoparticles as substrates for surface-enhanced vibrational spectroscopy: optimization and electrochemical stability. AU - Fan,Meikun, AU - Brolo,Alexandre G, PY - 2008/8/16/pubmed PY - 2008/11/15/medline PY - 2008/8/16/entrez SP - 1899 EP - 907 JF - Chemphyschem : a European journal of chemical physics and physical chemistry JO - Chemphyschem VL - 9 IS - 13 N2 - Three-dimensional nanostructured metallic substrates for enhanced vibrational spectroscopy are fabricated by self-assembly. Nanostructures consisting of one to 20 depositions of 13 nm-diameter Au nanoparticles (NPs) on Au films are prepared and characterized by means of AFM and UV/Vis reflection-absorption spectroscopy. Surface-enhanced polarization modulation infrared reflection-absorption spectroscopy (PM-IRRAS) is observed from Au NPs modified by the probe molecule 4-hydroxythiophenol. The limitation of this kind of substrate for surface-enhanced PM-IRRAS is discussed. The surface-enhanced Raman scattering (SERS) from the same probe molecule is also observed and the effect of the number of Au-NP depositions on the SERS efficiency is studied. The SERS signal from the probe molecule maximizes after 11 Au-NP depositions, and the absolute SERS intensities from different batches are reproducible within 20%. In situ electrochemical SERS measurements show that these substrates are stable within the potential window between -800 and +200 mV (vs. Ag/AgCl/sat. Cl(-)). SN - 1439-7641 UR - https://www.unboundmedicine.com/medline/citation/18704901/Self_assembled_Au_nanoparticles_as_substrates_for_surface_enhanced_vibrational_spectroscopy:_optimization_and_electrochemical_stability_ L2 - https://doi.org/10.1002/cphc.200800099 DB - PRIME DP - Unbound Medicine ER -