Fabricating and Examining of Langmuir Films of Reduced Graphene Oxide

• Published in: Russian Journal of Physical Chemistry A Vol. 93; no. 2; pp. 338 - 342
• Main Authors: Dzhanabekova, R. Kh, Seliverstova, E. V., Zhumabekov, A. Zh, Ibrayev, N. Kh
• Format: Journal Article
• Language: English
• Published: Moscow Pleiades Publishing 01-02-2019; Springer Nature B.V
• Subjects: Chemistry; Chemistry and Materials Science; Contact pressure; Graphene; Langmuir-Blodgett films; Molecular electronics; Monolayers; Optical properties; Photovoltaic cells; Physical Chemistry; Physical Chemistry of Surface Phenomena; Pressure; Pressure effects; Solar cells; Substrates; Synthesis; Langmuir–Blodgett films; transfer pressure; electrophysical properties; optical properties; reduced graphene oxide; structure
• ISSN: 0036-0244; 1531-863X
• DOI: 10.1134/S0036024419020092

The effect the transfer pressure has on structural, optical, and electrophysical properties of Langmuir-Blodgett (LB) films of reduced graphene oxide (rGO) is studied. Investigation of physicochemical properties of rGO monolayers on the subphase surface shows that the rGO monolayer on the subphase surface predominantly exists in the liquid state. Increased surface pressure in the film makes rGO particles lie closer to and contact one another, followed by the overlapping and crumpling of some film sheets. Electron microscope studies show that as monolayers are transferred onto solid substrates, rGO forms uniform island-type films with clearly discernible clusters whose density grows along with surface pressure. The synthesized rGO films are highly transparent (87–96%) in the visible spectral region. The LB films transferred onto solid substrates at a lower surface pressure exhibit the best electrophysical and electroconductive properties. The reported findings can be used in developing technology for synthesizing transparent nanosized films from reduced graphene oxide and its derivatives for use in molecular electronics and photovoltaics.