Jump to main content
Jump to site search

Issue 21, 2015
Previous Article Next Article

The role of ambient ice-like water adlayers formed at the interfaces of graphene on hydrophobic and hydrophilic substrates probed using scanning probe microscopy

Author affiliations

Abstract

In this work, we report the role of ice-like water adlayers (IWLs) formed under ambient conditions in between mechanically exfoliated as-prepared and patterned few layer graphene (FLG) and multi-layer graphene (MLG) on hydrophobic Si and hydrophilic SiO2/Si substrates. The growth of the IWL is probed by measuring the height changes in graphene using intermittent contact atomic force microscopy (IC-AFM) and their electrostatic effect is studied using electrostatic force microscopy (EFM) over time. It is found that more IWLs are formed within a shorter period of time, when both as-prepared graphene and underlying substrates are either hydrophobic or hydrophilic in nature. In contrast, AFM voltage nanolithographically patterned trenches on FLG and MLG on the Si substrate show quick formation of IWLs. The effect of IWL formed, on the dimensions of trenches, is correlated with the variation of the measured EFM phase shift over time. This study demonstrates the dependence of the formation of IWLs under ambient conditions on the affinity towards water, at the interface of graphene on hydrophobic and hydrophilic substrates, which has important implications for the performance of graphene-based nanoelectronic devices.

Graphical abstract: The role of ambient ice-like water adlayers formed at the interfaces of graphene on hydrophobic and hydrophilic substrates probed using scanning probe microscopy

Back to tab navigation

Supplementary files

Article information


Submitted
24 Mar 2015
Accepted
22 Apr 2015
First published
27 Apr 2015

Phys. Chem. Chem. Phys., 2015,17, 13964-13972
Article type
Paper
Author version available

The role of ambient ice-like water adlayers formed at the interfaces of graphene on hydrophobic and hydrophilic substrates probed using scanning probe microscopy

T. Gowthami, G. Tamilselvi, G. Jacob and G. Raina, Phys. Chem. Chem. Phys., 2015, 17, 13964
DOI: 10.1039/C5CP01703C

Social activity

Search articles by author

Spotlight

Advertisements