Jump to main content
Jump to site search

Issue 75, 2014
Previous Article Next Article

Going beyond the self-assembled monolayer: metal intercalated dithiol multilayers and their conductance

Author affiliations

Abstract

A study of the self-assembly of silver atom intercalated 5,5′-bis(mercaptomethyl)-2,2′-bipyridine (BPD; HS-CH2-(C5H3N)2-CH2-SH) and 1,4-benzenedimethanethiol (BDMT; HS-CH2-(C6H4)-CH2-SH)) dithiol (DT) multilayers on gold is presented. The bilayer of these SAMs can be obtained starting from the exposure of a DT monolayer to a concentrated silver ion solution. After grafting the silver atoms on the sulfur end group, the incubation of the resulting DT–Ag SAM in a DT solution leads to the formation of a DT–Ag–DT bilayer. This process was extended to make a multilayer structure. The corresponding changes in these self-assembled layers on Au are characterized by X-ray photoelectron spectroscopy (XPS), spectroscopic ellipsometry (SE) measurements, and IV characteristics. Our interpretation of evolution in the absorbed layer are based on changes in intensities of peaks in XPS related to S bound to substrate or Ag and in –SH groups, as well as changes in thickness and absorption features in SE measurements. The latter show the evolution in absorbance wavelength as a function of thickness and indicate a decrease in the HOMO–LUMO gap from about 4.5 eV to 4 eV. The IV characteristics show a significant bias dependence on the number of the BPD layers and there appears to be a transition from tunneling to a hopping regime when going from the single to the multiple layers.

Graphical abstract: Going beyond the self-assembled monolayer: metal intercalated dithiol multilayers and their conductance

Back to tab navigation

Supplementary files

Article information


Submitted
09 Jun 2014
Accepted
18 Aug 2014
First published
20 Aug 2014

RSC Adv., 2014,4, 39657-39666
Article type
Paper
Author version available

Going beyond the self-assembled monolayer: metal intercalated dithiol multilayers and their conductance

H. Hamoudi, K. Uosaki, K. Ariga and V. A. Esaulov, RSC Adv., 2014, 4, 39657 DOI: 10.1039/C4RA05476H

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.


Social activity

Search articles by author

Spotlight

Advertisements