Rani, Adila Oh, Kyoung Ah Koo, Hyeyoung Lee, Hyung Jung Park, Min 2024-01-20T17:31:11Z 2024-01-20T17:31:11Z 2021-09-02 2011-03-15 0169-4332 https://pubs.kist.re.kr/handle/201004/130531 Extremely thin sheets of carbon atoms called graphene have been predicted to possess excellent thermal properties, electrical conductivity, and mechanical stiffness. To harness such properties in composite materials for multifunctional applications, one would require the incorporation of graphene. In this study, new thin film composites were created using layer-by-layer (LBL) assembly of polymer-coated graphitic nanoplatelets. The positive and negative polyelectrolytes used to cover graphene sheets were poly allylamine hydrochloride (PAH) and poly sodium 4-styrenesulfonate (PSS). The synthesized poly allylamine hydrochloride-graphene (PAH-G) and poly sodium 4-styrenesulfonate-gaphene (PSS-G) were characterized by X-ray photoelectron spectroscopy (XPS), atomic force microscopy (AFM), and thermo gravimetric analysis (TGA). The multilayer films created by spontaneous sequential adsorption of PAH-G and PSSG were characterized by ultra violet spectroscopy (UV-vis), scanning electron microscopy (SEM), and AFM. The electrical conductivity of the graphene/polyelectrolyte multilayer film composites measured by the four-point probe method was 0.2 S cm(-1), which was sufficient for the construction of advanced electro-optical devices and sensors. (C) 2011 Elsevier B.V. All rights reserved. English ELSEVIER OXIDE TRANSPARENT SHEETS Multilayer films of cationic graphene-polyelectrolytes and anionic graphene-polyelectrolytes fabricated using layer-by-layer self-assembly Article 10.1016/j.apsusc.2011.01.007 1 APPLIED SURFACE SCIENCE, v.257, no.11, pp.4982 - 4989 APPLIED SURFACE SCIENCE 257 11 4982 4989 scie scopus 000287993900040 2-s2.0-79951681653 Chemistry, Physical Materials Science, Coatings & Films Physics, Applied Physics, Condensed Matter Chemistry Materials Science Physics Article OXIDE TRANSPARENT SHEETS PAH-G PSS-G Layer-by-layer multilayer films Electrical conductivity