Manipulating the electronic and chemical properties of graphene via molecular functionalization

Mao, Hui Z.; Lu, Yun; Lin, J.; Zhong, Shu; Wee, Andrew Thye Shen; Chen, Wei

doi:10.1016/j.progsurf.2013.02.001

Cited by 171 publications

(82 citation statements)

References 186 publications

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“…We anticipate that the flexibility to modify the pores through well-known conjugation chemistries 39,40 will further open new avenues for incorporating versatile functionality in these membranes. While we have used ion bombardment as a highly controllable method to induce defects, 26,41 growth of defects formed during graphene synthesis through doping 42 or other methods 9,23 will further enhance the scalability of this approach.…”

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confidence: 99%

Selective Ionic Transport through Tunable Subnanometer Pores in Single-Layer Graphene Membranes

et al. 2014

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We report selective ionic transport through controlled, high-density, subnanometer diameter pores in macroscopic single-layer graphene membranes. Isolated, reactive defects were first introduced into the graphene lattice through ion bombardment and subsequently enlarged by oxidative etching into permeable pores with diameters of 0.40 ± 0.24 nm and densities exceeding 1012 cm–2, while retaining structural integrity of the graphene. Transport measurements across ion-irradiated graphene membranes subjected to in situ etching revealed that the created pores were cation-selective at short oxidation times, consistent with electrostatic repulsion from negatively charged functional groups terminating the pore edges. At longer oxidation times, the pores allowed transport of salt but prevented the transport of a larger organic molecule, indicative of steric size exclusion. 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.

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Section: Table Of Contents Graphicmentioning

confidence: 99%

Selective Ionic Transport through Tunable Subnanometer Pores in Single-Layer Graphene Membranes

et al. 2014

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“…Chemical functionalization of graphene is a versatile technique with various applications in band gap engineering, gas sensing, and spintronics [11][12][13][14][15]. The species range from single atoms [16,17], all the way to large polymers [18].…”

Section: Introductionmentioning

confidence: 99%

Covalent and noncovalent functionalization of pristine and defective graphene by cyclohexane and dehydrogenated derivatives

Sayin

Toffoli

Üstünel

2015

Applied Surface Science

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“…1,2 Among the multiple developed approaches, incorporation of impurities in graphene is shown to be an efficient and versatile method for controllable tuning of its physical and chemical properties. 3À7 For example, by substituting carbon atoms with nitrogen or boron, 8 it is possible to turn graphene into a semiconductor of n-or p-type, respectively.…”

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confidence: 99%

Epitaxial B-Graphene: Large-Scale Growth and Atomic Structure

et al. 2015

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Embedding foreign atoms or molecules in graphene has become the key approach in its functionalization and is intensively used for tuning its structural and electronic properties.Here, we present an efficient method based on chemical vapor deposition for large scale growth of boron-doped graphene (B-graphene) on Ni(111) and Co(0001) substrates using carborane molecules as the precursor. It is shown that up to 19 at. % of boron can be embedded in the graphene matrix and that a planar CÀB sp 2 network is formed. It is resistant to air exposure and widely retains the electronic structure of graphene on metals. The large-scale and local structure of this material has been explored depending on boron content and substrate. By resolving individual impurities with scanning tunneling microscopy we have demonstrated the possibility for preferential substitution of carbon with boron in one of the graphene sublattices (unbalanced sublattice doping) at low doping level on the Ni(111) substrate. At high boron content the honeycomb lattice of B-graphene is strongly distorted, and therefore, it demonstrates no unballanced sublattice doping.

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Manipulating the electronic and chemical properties of graphene via molecular functionalization

Cited by 171 publications

References 186 publications

Selective Ionic Transport through Tunable Subnanometer Pores in Single-Layer Graphene Membranes

Selective Ionic Transport through Tunable Subnanometer Pores in Single-Layer Graphene Membranes

Covalent and noncovalent functionalization of pristine and defective graphene by cyclohexane and dehydrogenated derivatives

Epitaxial B-Graphene: Large-Scale Growth and Atomic Structure

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