Investigation of the Local Structure of Graphene Oxide

Saxena, Sumit; Tyson, Trevor; Negusse, Ezana

doi:10.1021/jz1014339

Cited by 117 publications

(92 citation statements)

References 30 publications

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“…The peak at 540.1 eV is usually assigned to hydroxyl groups, however, the contribution of the other oxygen functionalities, such as carbonyl, carboxylic and epoxides is also suggested. 25 At the same time, the peak at 535.8 eV shifted to lower energy of 534.5 eV, which is rather similar to that of the peak (533.6 eV) assigned to state of C-O from epoxide. 26 Based on these results and a small interlayer spacing of TRGO900, it would be better to think that the hydroxyl groups on the GO layers are more preferably removed, while some C-O and C=O containing groups such as pyrone, pyran, furan and quiones 27 still remained within the carbon layers of TRGO900.…”

Section: Resultssupporting

confidence: 64%

Electrochemical Intercalation of Sodium Ions into Thermally Reduced Graphite Oxide

et al. 2015

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The structure of carbon obtained from the thermal reduction of graphite oxide at 900°C after electrochemical storage sodium ions was investigated. X-ray diffraction measurement of the carbon sample after charged to various potentials indicated that sodium ions are stored between the layers of carbon below 0.3 V vs. Na/Na + though the interlayer spacing of it was similar to that of graphite. The lower LUMO energy as revealed from the broad π* peak in the region of CK observed in soft X-ray absorption measurement was responsible for the intercalation of a large amount of sodium ions into the present carbon material.

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Section: Resultssupporting

confidence: 64%

Electrochemical Intercalation of Sodium Ions into Thermally Reduced Graphite Oxide

et al. 2015

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“…Potential applications of GO in water desalination and purification has also been explored [19][20][21][22]. The unique structural features [23], high mechanical strength [24] and the atomic-level thickness of GO have been exploited to fabricate an extremely thin membrane with controlled pore size and high flux [19,20,25,26]. Molecular simulation have shown the impermeability to salt molecules along with high pure water flux [26], and GO nanosheets have demonstrated excellent antifouling properties [27].…”

Section: Introductionmentioning

confidence: 99%

Desalination across a graphene oxide membrane via direct contact membrane distillation

2016

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“…edge NEXAFS database in the literature is not rich enough to deconvolute and assign all the peaks41,[49][50][51][52][53] . Upon judicious review of the available literature we have deconvoluted the peaks as shown inFigure 8 (a).…”

mentioning

confidence: 99%

Oxidation of Rubrene Thin Films: An Electronic Structure Study

et al. 2014

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The performances of organic semiconductor devices are crucially linked with their stability at the ambient atmosphere. The evolution of electronic structures of 20 nm thick rubrene films exposed to ambient environment with time has been studied by UV and X-ray photoemission spectroscopy (UPS and XPS), near edge X-ray absorption fine structure (NEXAFS) spectroscopy, and density functional theory (DFT). XPS, NEXAFS data, and DFT calculated values suggest the formation of rubrene-epoxide and rubrene-endoperoxide through reaction of tetracene backbone with oxygen of ambient environment. Angle dependent XPS measurement indicates that the entire probed depth of the films reacts with oxygen by spending only about 120 min in ambient environment. The HOMO peak of pristine rubrene films almost disappears by exposure of 120 min to ambient environment. The evolution of the valence band (occupied states) and NEXAFS (unoccupied states) spectra indicates that the films become more insulating with exposure as the HOMO-LUMO gap increases on oxidation. Oxygen induced chemical reaction completely destroys the delocalized nature of the electron distribution in the tetracene backbone of rubrene. The results are relevant to the performance and reliability of rubrene based devices in the environment.

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Investigation of the Local Structure of Graphene Oxide

Cited by 117 publications

References 30 publications

Electrochemical Intercalation of Sodium Ions into Thermally Reduced Graphite Oxide

Electrochemical Intercalation of Sodium Ions into Thermally Reduced Graphite Oxide

Desalination across a graphene oxide membrane via direct contact membrane distillation

Oxidation of Rubrene Thin Films: An Electronic Structure Study

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