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
Molecular theory of graphene oxide
TL;DR: In this paper, the molecular theory of graphene oxide is applied to graphene oxide, which considers its oxide as a final product in a succession of polyderivatives related to a series of oxidation reactions involving different oxidants.
Journal ArticleDOI
Fluorescence from graphene oxide and the influence of ionic, π–π interactions and heterointerfaces: electron or energy transfer dynamics
Sesha Vempati,Tamer Uyar +1 more
TL;DR: Various results related to fluorescence and influencing factors are juxtapose so that a conclusive interpretation may be unveiled and the interfacial charge transfer across heterostructures and the implication on the optical properties of GO or reduced graphene oxide (rGO) are discussed.
Journal ArticleDOI
A rapid and eco-friendly route to synthesize graphene-doped silica nanohybrids
Andrea Maio,Simonpietro Agnello,Reza Khatibi,Luigi Botta,Antonino Alessi,Antonino Alessi,Aurora Piazza,Gianpiero Buscarino,Alessio Mezzi,Giuseppe Pantaleo,Roberto Scaffaro +10 more
TL;DR: In this article, the possibility to synthesize graphene oxide-based nanohybrids with pure and O2-doped silica nanoparticles by a rapid and easy hydrothermal process has been explored.
Journal ArticleDOI
Graphene oxide nano-domain formation via wet chemical oxidation of graphene
TL;DR: In this paper, a microscopic study of the oxidation of single layer graphene on SiO2/Si substrate via wet chemistry is presented, where a uniform graphene oxide region growing at the edge, nano-sized graphene oxide domains within unoxidized graphene are observed.
Journal ArticleDOI
Reduced graphene oxide coating enhances osteogenic differentiation of human mesenchymal stem cells on Ti surfaces.
Moon Sung Kang,Seung Jo Jeong,Seok Hyun Lee,Bongju Kim,Suck Won Hong,Jong-Ho Lee,Dong-Wook Han +6 more
TL;DR: In this paper, reduced graphene oxide (rGO) was uniformly coated by meniscus-dragging deposition (MDD) technique to fabricate rGO-Ti substrate for orthopedic and dental implant application.
References
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Journal ArticleDOI
The rise of graphene
TL;DR: Owing to its unusual electronic spectrum, graphene has led to the emergence of a new paradigm of 'relativistic' condensed-matter physics, where quantum relativistic phenomena can now be mimicked and tested in table-top experiments.
Journal ArticleDOI
Raman spectrum of graphene and graphene layers.
Andrea C. Ferrari,Jannik C. Meyer,Vittorio Scardaci,Cinzia Casiraghi,Michele Lazzeri,Francesco Mauri,S. Piscanec,Da Jiang,K. S. Novoselov,S. Roth,A. K. Geim +10 more
TL;DR: This work shows that graphene's electronic structure is captured in its Raman spectrum that clearly evolves with the number of layers, and allows unambiguous, high-throughput, nondestructive identification of graphene layers, which is critically lacking in this emerging research area.
Journal ArticleDOI
Interpretation of Raman spectra of disordered and amorphous carbon
Andrea C. Ferrari,John Robertson +1 more
TL;DR: In this paper, a model and theoretical understanding of the Raman spectra in disordered and amorphous carbon is given, and the nature of the G and D vibration modes in graphite is analyzed in terms of the resonant excitation of \ensuremath{\pi} states and the long-range polarizability of the long range bonding.
Journal ArticleDOI
Improved Synthesis of Graphene Oxide
Daniela C. Marcano,Dmitry V. Kosynkin,Jacob M. Berlin,Alexander Sinitskii,Zhengzong Sun,Alexander S. Slesarev,Lawrence B. Alemany,Wei Lu,James M. Tour +8 more
TL;DR: An improved method for the preparation of graphene oxide (GO) is described, finding that excluding the NaNO(3), increasing the amount of KMnO(4), and performing the reaction in a 9:1 mixture of H(2)SO(4)/H(3)PO(4) improves the efficiency of the oxidation process.