Jump to main content
Jump to site search
PLANNED MAINTENANCE Close the message box

There will be scheduled maintenance work beginning on Saturday 15th June 2019 at 8:30 am through to Sunday 16th June 2019 at 11:30 pm (BST).

During this time our website may be temporarily affected. We apologise for any inconvenience this might cause and thank you for your patience.


Issue 21, 2012
Previous Article Next Article

Surface-enhanced Raman scattering-active gold nanoparticles modified with a monolayer of silver film

Author affiliations

Abstract

As shown in the literature, electrochemical underpotential deposition (UPD) offers the ability to deposit up to a monolayer of one metal onto a more noble metal with a flat surface. In this work, we develop an electrochemical pathway to prepare more surface-enhanced Raman scattering (SERS)-active substrates with Ag UPD-modified Au nanoparticles (NPs) by using sonoelectrochemical deposition–dissolution cycles (SEDDCs). Encouragingly, the SERS of Rhodamine 6G (R6G) adsorbed on these Ag UPD-modified Au NPs exhibits a higher intensity by ca. 12-fold magnitude, as compared with that of R6G adsorbed on unmodified Au NPs. The prepared SERS-active substrate demonstrates a large Raman scattering enhancement for R6G with a detection limit of 2 × 10−14 M and an enhancement factor of 5.0 × 108. Also, the strategy proposed in this work to improve the SERS effects by using UPD Ag based on SEDDCs has an effect on the smaller probe molecules of 2,2′-bipyridine (BPy).

Graphical abstract: Surface-enhanced Raman scattering-active gold nanoparticles modified with a monolayer of silver film

Back to tab navigation

Publication details

The article was received on 05 Jul 2012, accepted on 24 Aug 2012 and first published on 28 Aug 2012


Article type: Paper
DOI: 10.1039/C2AN35912J
Analyst, 2012,137, 4943-4950

  •   Request permissions

    Surface-enhanced Raman scattering-active gold nanoparticles modified with a monolayer of silver film

    C. Chang, K. Yang, Y. Liu, C. Yu and Y. Wu, Analyst, 2012, 137, 4943
    DOI: 10.1039/C2AN35912J

Search articles by author

Spotlight

Advertisements