Journal ArticleDOI
Optical Spectroscopy Investigation of the Structural and Electrical Evolution of Controllably Oxidized Graphene by a Solution Method
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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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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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TL;DR: This work has devised a complete reduction process through chemical conversion by sodium borohydride and sulfuric acid treatment, followed by thermal annealing that is particularly effective in the restoration of the π-conjugated structure, and leads to highly soluble and conductive graphene materials.
PatentDOI
Narrow graphene nanoribbons from carbon nanotubes
Hongie Dai,Liying Jiao +1 more
TL;DR: In this paper, a method for making graphene nanoribbons (GNRs) by controlled unzipping of structures such as carbon nanotubes (CNTs) by etching (e.g., argon plasma etching) of Nanotubes partly embedded in a polymer film is presented.
Journal ArticleDOI
Blue photoluminescence from chemically derived graphene oxide
Goki Eda,Yun-Yue Lin,Cecilia Mattevi,Cecilia Mattevi,Hisato Yamaguchi,Hsin-An Chen,I-Sheng Chen,Chun-Wei Chen,Manish Chhowalla +8 more
TL;DR: In this paper, blue photoluminescence from chemically derived graphene oxide Goki Eda, Yun-Yue Lin, Cecilia Mattevi, Hisato Yamaguchi, Hsin-An Chen, I-Sheng Chen, Chun-Wei Chen, and Manish Chhowalla
Journal ArticleDOI
Evolution of surface functional groups in a series of progressively oxidized graphite oxides
Tamás Szabó,Ottó Berkesi,Peter Forgo,K. V. Josepovits,Yiannis Sanakis,Dimitris Petridis,Imre Dékány +6 more
TL;DR: In this paper, a model based on elemental analysis, transmission electron microscopy, X-ray dif... was proposed to unravel the chemical structure of graphite oxide (GO).
Journal ArticleDOI
Energy gaps and a zero-field quantum Hall effect in graphene by strain engineering
TL;DR: In this paper, it was shown that a designed strain aligned along three main crystallographic directions induces strong gauge fields that effectively act as a uniform magnetic field exceeding 10'T, similar to the case of a topological insulator.