Journal ArticleDOI
Optical Spectroscopy Investigation of the Structural and Electrical Evolution of Controllably Oxidized Graphene by a Solution Method
TLDR
In this paper, a precisely controlled chemical modification of exfoliated graphene on a substrate was achieved by solution-phase oxidation, which exhibited an energy band gap of 2 eV.Abstract:
A precisely controlled chemical modification of exfoliated graphene on a substrate was achieved by solution-phase oxidation. The structural and electrical evolution of graphene induced by oxygen-related defects was investigated using micro-Raman and photoluminescence spectroscopy. The sp2-hybrid carbon network in monolayer graphene was found to gradually decrease with increasing degree of oxidation. The size of the graphene quantum dots was finally reduced to about 1 nm, which exhibited an energy band gap of 2 eV. The double-layer graphene showed a symmetry breaking induced by the defects. The process of solution modification may provide a facile method to tailor the electrical properties of graphene on a chip for constructing carbon-based nanoelectronics.read more
Citations
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Journal ArticleDOI
The chemical and structural analysis of graphene oxide with different degrees of oxidation
TL;DR: In this article, the formation of different types of oxygen containing functional groups in GO and their influences on its structure were analyzed using X-ray diffraction (XRD), Fourier transform infra-red spectra, x-ray photoelectron spectra (XPS), zeta potential analysis and Raman spectroscopy.
Journal ArticleDOI
Selective ionic transport through tunable subnanometer pores in single-layer graphene membranes.
Sean C. O'Hern,Michael S. H. Boutilier,Juan Carlos Idrobo,Yi Song,Jing Kong,Tahar Laoui,Muataz Ali Atieh,Rohit Karnik +7 more
TL;DR: The ability to tune the selectivity of graphene through controlled generation of subnanometer pores addresses a significant challenge in the development of advanced nanoporous graphene membranes for nanofiltration, desalination, gas separation, and other applications.
Journal ArticleDOI
Tuning the Electrical and Optical Properties of Graphene by Ozone Treatment for Patterning Monolithic Transparent Electrodes
TL;DR: A well-defined graphene pattern is demonstrated by using ozone photolithography, in which the ozone-treated graphene electrodes are monolithic but separated by insulating GO regions, indicating the promising use of ozone treatment to achieve high-performance graphene-based optoelectronic devices.
Journal ArticleDOI
Principles Governing Control of Aggregation and Dispersion of Graphene and Graphene Oxide in Polymer Melts
TL;DR: By combining coarse-grained molecular dynamics and newly developed accurate models of GO, the driving forces that lead to the various morphologies are resolved and computational methods to design directed synthesis routes for diverse self-assemblies and applications are provided.
Journal ArticleDOI
Disorder imposed limits of mono- and bilayer graphene electronic modification using covalent chemistry.
Chih-Jen Shih,Qing Hua Wang,Zhong Jin,Geraldine L.C. Paulus,Daniel Blankschtein,Pablo Jarillo-Herrero,Michael S. Strano +6 more
TL;DR: An electrochemical approach involving phenyl-diazonium salts is used to systematically probe electronic modification in MLG and BLG with increasing functionalization for the first time, obtaining the highest conversion values to date.
References
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Journal ArticleDOI
Single Layer vs Bilayer Graphene: A Comparative Study of the Effects of Oxygen Plasma Treatment on Their Electronic and Optical Properties
Amirhasan Nourbakhsh,Mirco Cantoro,Alexander Klekachev,Geoffrey Pourtois,Tom Vosch,Johan Hofkens,Marleen H. van der Veen,Marc Heyns,Stefan De Gendt,Bert F. Sels +9 more
TL;DR: In this article, the effects of a mild O2 plasma treatment on the structural, optical, and electrical properties of single-layer (SLG) and bilayer graphene (BLG) were investigated.
Journal ArticleDOI
The Morphology of Graphene Sheets Treated in an Ozone Generator
Haihua Tao,Haihua Tao,Joel Moser,Francesc Alzina,Qian Wang,C. M. Sotomayor-Torres,C. M. Sotomayor-Torres +6 more
TL;DR: In this paper, the highly disordered morphology of single-layer and multilayer graphene sheets that results from long exposures to ozone molecules and oxygen radicals in an ozone generator was characterized using atomic force microscopy and Raman spectroscopy.