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

Scheduled maintenance upgrade on Thursday 4th of May 2017 from 8.00am to 9.00am (BST).

During this time our websites will be offline temporarily. If you have any questions please use the feedback button on this page. We apologise for any inconvenience this might cause and thank you for your patience.


Issue 43, 2016
Previous Article Next Article

Charge transfer process at the Ag/MPH/TiO2 interface by SERS: alignment of the Fermi level

Author affiliations

Abstract

A nanoscale metal–molecule–semiconductor assembly (Ag/4-mercaptophenol/TiO2) has been fabricated over Au nanoparticle (NP) films as a model to study the interfacial charge transfer (CT) effects involved in Ag/MPH/TiO2. Due to the interaction between Au NPs and Ag NPs, some distinct differences occur in the SERS spectra. We also measured the SERS of Ag/MPH (4-mercaptophenol), Ag/MPH/TiO2, and Au/Ag/MPH/TiO2 assemblies at excitation wavelengths of 477, 514, 532, 633, and 785 nm. We found that the changes in the CT process, caused by the introduction of TiO2 and Au, can be reflected in SERS. Then in combination with other detection methods, we proposed a possible CT process involved in the Ag/MPH, Ag/MPH/TiO2, and Au/Ag/MPH/TiO2 assemblies. A Pt/Ag/MPH/TiO2 assembly was also constructed to verify our proposed CT mechanism. This work not only provides more details about CT between metal–molecule–semiconductor interfaces but also aids in constructing nanoscale models to study interfacial problems with the SERS technique.

Graphical abstract: Charge transfer process at the Ag/MPH/TiO2 interface by SERS: alignment of the Fermi level

Back to tab navigation
Please wait while Download options loads

Supplementary files

Publication details

The article was received on 22 Jun 2016, accepted on 12 Oct 2016 and first published on 13 Oct 2016


Article type: Paper
DOI: 10.1039/C6CP04370D
Citation: Phys. Chem. Chem. Phys., 2016,18, 30053-30060
  •   Request permissions

    Charge transfer process at the Ag/MPH/TiO2 interface by SERS: alignment of the Fermi level

    X. Zhang, H. Sui, X. Wang, H. Su, W. Cheng, X. Wang and B. Zhao, Phys. Chem. Chem. Phys., 2016, 18, 30053
    DOI: 10.1039/C6CP04370D

Search articles by author