Synthesis of size tunable monodispersed silver nanoparticles and the effect of size on SERS enhancement

Cassar, Richard N. and Graham, Duncan and Larmour, Iain and Wark, Alastair W. and Faulds, Karen (2014) Synthesis of size tunable monodispersed silver nanoparticles and the effect of size on SERS enhancement. Vibrational Spectroscopy, 71. pp. 41-46. ISSN 0924-2031

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    Abstract

    Spherical and monodispersed silver nanoparticles (AgNPs) are ideal for fundamental research as the contribution from size and shape can be accounted for in the experimental design. In this paper a seeded growth method is presented, whereby varying the concentration of sodium borohydride-reduced silver nanoparticle seeds, different sizes of stable spherical nanoparticles with a low polydispersity nanoparticles are produced using hydroquinone as a selective reducing agent. The surface-enhanced Raman scattering (SERS) enhancement factor for each nanoparticle size produced (17, 26, 50, and 65 nm) was then assessed using three different analytes, rhodamine 6G (R6G), malachite green oxalate (MGO) and thiophenol (TP). The enhancement factor gives an indication of the Raman enhancement effect by the nanoparticle. Using non-aggregated conditions and two different laser excitation wavelength (633 nm and 785 nm) it is shown that an increase in particle size results in an increased enhancement for each analyte used.

    Author(s):Cassar, Richard N., Graham, Duncan ORCID logoORCID: https://orcid.org/0000-0002-6079-2105, Larmour, Iain, Wark, Alastair W. ORCID logoORCID: https://orcid.org/0000-0001-8736-7566 and Faulds, Karen ORCID logoORCID: https://orcid.org/0000-0002-5567-7399
    Item type:Article
    ID code:47444
    Keywords:hydroquinone reduction, silver nanoparticle synthesis, surface-enhanced Raman scattering, Chemistry, Spectroscopy
    Subjects:Science > Chemistry
    Department:University of Strathclyde > University of Strathclyde
    Faculty of Science > Pure and Applied Chemistry
    Technology and Innovation Centre > Bionanotechnology
    Depositing user: Pure Administrator
    Date deposited:11 Apr 2014 09:10
    Last modified:14 Jan 2020 08:40
    Related URLs:
    URI:https://strathprints.strath.ac.uk/id/eprint/47444
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