Reversible Transition of Graphene from Hydrophobic to Hydrophilic in the Presence of an Electric Field

Jiang, Q.; Ao, Zhimin; Chu, Dewei; Jiang, Qing

doi:10.1021/jp3050466

Cited by 50 publications

(39 citation statements)

References 20 publications

(29 reference statements)

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“…It is found that the adsorption position and orientation change when the defects are present. The obtained structures agree well with those in previous studies13212223. For example, for the case of a mono-atom vacancy, the physisorbed H 2 O molecule was atop of the hollow site of the vacancy, while the chemisorbed H 2 O molecule would be separated into two H atoms and one O atom attached to the three C atoms at the vacancy, which is consistent with a previously reported result21.…”

Section: Resultssupporting

confidence: 92%

Reversible Hydrophobic to Hydrophilic Transition in Graphene via Water Splitting Induced by UV Irradiation

Ao²,

Younis

et al. 2014

Sci Rep

112

104

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Although the reversible wettability transition between hydrophobic and hydrophilic graphene under ultraviolet (UV) irradiation has been observed, the mechanism for this phenomenon remains unclear. In this work, experimental and theoretical investigations demonstrate that the H2O molecules are split into hydrogen and hydroxyl radicals, which are then captured by the graphene surface through chemical binding in an ambient environment under UV irradiation. The dissociative adsorption of H2O molecules induces the wettability transition in graphene from hydrophobic to hydrophilic. Our discovery may hold promise for the potential application of graphene in water splitting.

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Section: Resultssupporting

confidence: 92%

Reversible Hydrophobic to Hydrophilic Transition in Graphene via Water Splitting Induced by UV Irradiation

Ao²,

Younis

et al. 2014

Sci Rep

112

104

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show abstract

“…Therefore, nowadays more and more studies investigate the atomic structures and adsorption property dependence of graphene under different strength of external electric field. In this way, the CO adsorption on graphene nanodot, 3 the interaction between O 2 and Au-doped graphene 4 or the dissociative adsorption of H 2 O on graphene 5 have been analyzed by taking the external electric field into account. These studies showed that the applied electric field can enhance or weaken the adsorption of different particles onto the graphene surface as well as it can provide possible new and/or energetically more favourable reaction pathways which can not be reached otherwise.…”

Section: Introductionmentioning

confidence: 99%

Some Unexpected Behavior of the Adsorption of Alkali Metal Ions onto the Graphene Surface under the Effect of External Electric Field

et al. 2013

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In this work the interaction between alkali metal ions and graphene surface with the absence and the presence of external electric field applied perpendicular to the surface was investigated. M05-2X/6-31G(d) DFT calculations were performed to describe the adsorption properties. Results show that the electric field pushes closer the positively charged ion to the graphene, where the charge transfer between the alkali metal cations and the electron rich graphene surface increases. At a species-dependent certain strength of the electric field the excess electrons cause negative charge on the alkali metal ion. This effect will promote the removal of the ion from the surface.

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“…Previously, we attempted to tailor the surface property of graphene surface from hydrophobic to hydrophilic using several methods including O 2 plasma, 27,28 O 3 treatment, 29,30 UV irradiation, 31,32 surface chemical doping, 33 and electrical field. 34 …”

mentioning

confidence: 99%

Atomic Scale Study on Growth and Heteroepitaxy of ZnO Monolayer on Graphene

et al. 2016

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Atomically thin semiconducting oxide on graphene carries a unique combination of wide band gap, high charge carrier mobility, and optical transparency, which can be widely applied for optoelectronics. However, study on the epitaxial formation and properties of oxide monolayer on graphene remains unexplored due to hydrophobic graphene surface and limits of conventional bulk deposition technique. Here, we report atomic scale study of heteroepitaxial growth and relationship of a single-atom-thick ZnO layer on graphene using atomic layer deposition. We demonstrate atom-by-atom growth of zinc and oxygen at the preferential zigzag edge of a ZnO monolayer on graphene through in situ observation. We experimentally determine that the thinnest ZnO monolayer has a wide band gap (up to 4.0 eV), due to quantum confinement and graphene-like structure, and high optical transparency. This study can lead to a new class of atomically thin two-dimensional heterostructures of semiconducting oxides formed by highly controlled epitaxial growth.

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Reversible Transition of Graphene from Hydrophobic to Hydrophilic in the Presence of an Electric Field

Cited by 50 publications

References 20 publications

Reversible Hydrophobic to Hydrophilic Transition in Graphene via Water Splitting Induced by UV Irradiation

Reversible Hydrophobic to Hydrophilic Transition in Graphene via Water Splitting Induced by UV Irradiation

Some Unexpected Behavior of the Adsorption of Alkali Metal Ions onto the Graphene Surface under the Effect of External Electric Field

Atomic Scale Study on Growth and Heteroepitaxy of ZnO Monolayer on Graphene

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