Journal
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
Volume 224, Issue -, Pages 150-157Publisher
ELSEVIER
DOI: 10.1016/j.mseb.2017.07.018
Keywords
Graphene oxide; Hummer's method; Raman spectroscopy; FTIR; GO papers; Basal surfaces
Funding
- Office of Naval Research of The U.S. Department of Defense (DoD) [N000014-15-1-2717]
- Army Research Office of The US Department of Defense (DoD) [64705CHREP, 67290CHREP]
- University Grants Commission (UGC) India [5-131/2016(IC)]
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Exfoliation method is a most cost effective method for producing chemically derived-graphene (CDG) yet electronic performance of CDG strongly depends on the lateral and vertical dimensions of graphene especially in regards to the development of macroscopic scale films. This work demonstrates the variation in functionality of Graphene oxide (GO) prepared via Marcano-Tour's and modified Hummer's method using two different sized graphite precursors. Reduced GO papers were fabricated using vacuum filtration and examined by Hall probe and Raman spectroscopy to ensure their quality. A correlation between oxidation-controlled GO size with their overall electrical conductivity is explored by Fourier Transform Infrared spectroscopy (FTIR), Thermo Gravimetric Analysis (TGA) and X-ray Diffraction (XRD) techniques. This study reveals that the modified Hummer's method suitably preserves basal planes of GO produced from larger GO flakes with less inter-sheet resistance and illustrates the importance of comparing synthetic methods for producing large area high quality graphene related nanostructures.
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