Graphene-based LbL deposited films: further study of electrical and gas sensing properties

NABOK, Aleksey, WALCH, N.J., DUTTON, S, DAVIS, F. and HIGSON, S.P.J. (2017). Graphene-based LbL deposited films: further study of electrical and gas sensing properties. MATEC Web of Conferences, 98, 04001.

Nabok - Graphene-based LbL deposited film (VoR).pdf - Published Version
Creative Commons Attribution.

Download (610kB) | Preview
Official URL:
Link to published version::


Graphene-surfactant composite materials obtained by the ultrasonic exfoliation of graphite powder in the presence of ionic surfactants (either CTAB or SDS) were utilised to construct thin films using layer-by-layer (LbL) electrostatic deposition technique. A series of graphene-based thin films were made by alternating layers of either graphene-SDS with polycations (PEI or PAH) or graphene-CTAB with polyanions (PSS). Also, graphene-phthalocyanine composite films were produced by alternating layers of graphene-CTAB with tetrasulfonated nickel phthalocyanine. Graphene-surfactant LbL films exhibited good electric conductivity (about 0.1 S/cm) of semiconductor type with a band gap of about 20 meV. Judging from UV-vis spectra measurements, graphene-phthalocyanine LbL films appeared to form joint π-electron system. Gas sensing testing of such composite films combining high conductivity of graphene with the gas sensing abilities of phthalocyanines showed substantial changes (up to 10%) in electrical conductivity upon exposure to electro-active gases such as HCl and NH3.

Item Type: Article
Research Institute, Centre or Group - Does NOT include content added after October 2018: Materials and Engineering Research Institute > Advanced Coatings and Composites Research Centre > Electronic Materials and Sensors Research Group
Identification Number:
Page Range: 04001
Depositing User: Margaret Boot
Date Deposited: 20 Apr 2017 16:02
Last Modified: 18 Mar 2021 04:07

Actions (login required)

View Item View Item


Downloads per month over past year

View more statistics