Molecular beam growth of graphene nanocrystals on dielectric substrates

Ulrich Wurstbauer; Theanne Schiros; Cherno Jaye; Annette S. Plaut; Rui He; Albert Rigosi; Christopher Gutiérrez; Daniel Fischer; Loren N. Pfeiffer; Abhay N. Pasupathy; Aron Pinczuk; Jorge M. Garcia

doi:10.1016/j.carbon.2012.06.008

Molecular beam growth of graphene nanocrystals on dielectric substrates

Ulrich Wurstbauer, Theanne Schiros, Cherno Jaye, Annette S. Plaut, Rui He, Albert Rigosi, Christopher Gutiérrez, Daniel Fischer, Loren N. Pfeiffer, Abhay N. Pasupathy, Aron Pinczuk, Jorge M. Garcia

Research output: Contribution to journal › Article › peer-review

33 Scopus citations

Abstract

We demonstrate the growth of graphene nanocrystals by molecular beam methods that employ a solid carbon source, and that can be used on a diverse class of large area dielectric substrates. Characterization by Raman and near edge X-ray absorption fine structure spectroscopies reveal a sp ² hybridized hexagonal carbon lattice in the nanocrystals. Lower growth rates (below 0.5 /min) favor the formation of layered, larger size multi-layer graphene crystallites (up to 22 nm) on all investigated substrates. The surface morphology is determined by the roughness of the underlying substrate (RMS ∼8 ) and graphitic monolayer steps are observed by ambient scanning tunneling microscopy.

Original language	English (US)
Pages (from-to)	4822-4829
Number of pages	8
Journal	Carbon
Volume	50
Issue number	13
DOIs	https://doi.org/10.1016/j.carbon.2012.06.008
State	Published - Nov 2012
Externally published	Yes

All Science Journal Classification (ASJC) codes

General Chemistry
General Materials Science

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10.1016/j.carbon.2012.06.008

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title = "Molecular beam growth of graphene nanocrystals on dielectric substrates",

abstract = "We demonstrate the growth of graphene nanocrystals by molecular beam methods that employ a solid carbon source, and that can be used on a diverse class of large area dielectric substrates. Characterization by Raman and near edge X-ray absorption fine structure spectroscopies reveal a sp 2 hybridized hexagonal carbon lattice in the nanocrystals. Lower growth rates (below 0.5 /min) favor the formation of layered, larger size multi-layer graphene crystallites (up to 22 nm) on all investigated substrates. The surface morphology is determined by the roughness of the underlying substrate (RMS ∼8 ) and graphitic monolayer steps are observed by ambient scanning tunneling microscopy.",

author = "Ulrich Wurstbauer and Theanne Schiros and Cherno Jaye and Plaut, {Annette S.} and Rui He and Albert Rigosi and Christopher Guti{\'e}rrez and Daniel Fischer and Pfeiffer, {Loren N.} and Pasupathy, {Abhay N.} and Aron Pinczuk and Garcia, {Jorge M.}",

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doi = "10.1016/j.carbon.2012.06.008",

language = "English (US)",

volume = "50",

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T1 - Molecular beam growth of graphene nanocrystals on dielectric substrates

AU - Wurstbauer, Ulrich

AU - Schiros, Theanne

AU - Jaye, Cherno

AU - Plaut, Annette S.

AU - He, Rui

AU - Rigosi, Albert

AU - Gutiérrez, Christopher

AU - Fischer, Daniel

AU - Pfeiffer, Loren N.

AU - Pasupathy, Abhay N.

AU - Pinczuk, Aron

AU - Garcia, Jorge M.

PY - 2012/11

Y1 - 2012/11

N2 - We demonstrate the growth of graphene nanocrystals by molecular beam methods that employ a solid carbon source, and that can be used on a diverse class of large area dielectric substrates. Characterization by Raman and near edge X-ray absorption fine structure spectroscopies reveal a sp 2 hybridized hexagonal carbon lattice in the nanocrystals. Lower growth rates (below 0.5 /min) favor the formation of layered, larger size multi-layer graphene crystallites (up to 22 nm) on all investigated substrates. The surface morphology is determined by the roughness of the underlying substrate (RMS ∼8 ) and graphitic monolayer steps are observed by ambient scanning tunneling microscopy.

AB - We demonstrate the growth of graphene nanocrystals by molecular beam methods that employ a solid carbon source, and that can be used on a diverse class of large area dielectric substrates. Characterization by Raman and near edge X-ray absorption fine structure spectroscopies reveal a sp 2 hybridized hexagonal carbon lattice in the nanocrystals. Lower growth rates (below 0.5 /min) favor the formation of layered, larger size multi-layer graphene crystallites (up to 22 nm) on all investigated substrates. The surface morphology is determined by the roughness of the underlying substrate (RMS ∼8 ) and graphitic monolayer steps are observed by ambient scanning tunneling microscopy.

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JO - Carbon

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Molecular beam growth of graphene nanocrystals on dielectric substrates

Abstract

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