Graphene oxide as a monoatomic blocking layer

Søren Vermehren Petersen; Magni Glyvradal; Peter Bøggild; Wenping Hu; Robert Krarup Feidenhans'l; Bo Wegge Laursen

doi:10.1021/nn302628q

Graphene oxide as a monoatomic blocking layer

Søren Vermehren Petersen, Magni Glyvradal, Peter Bøggild, Wenping Hu, Robert Krarup Feidenhans'l, Bo Wegge Laursen

15 Citations (Scopus)

Abstract

Monolayer graphene oxide (mGO) is shown to effectively protect molecular thin films from reorganization and function as an atomically thin barrier for vapor-deposited Ti/Al metal top electrodes. Fragile organic Langmuir-Blodgett (LB) films of C ₂₂ fatty acid cadmium salts (cadmium(II) behenate) were covered by a compressed mosaic LB film of mGO flakes. These hybrid LB films were examined with atomic force microscopy (AFM) and X-ray reflectivity, both with and without the metal top electrodes. While the AFM enabled surface and morphology analysis, the X-ray reflectivity allowed for a detailed structural depth profiling of the organic film and mGO layer below the metal top layers. The structure of the mGO-protected LB films was found to be perfectly preserved; in contrast, it has previously been shown that metal deposition completely destroys the first two LB layers of unprotected films. This study provides clear evidence of the efficient protection offered by a single atomic layer of GO.

Original language	English
Journal	ACS Nano
Volume	6
Issue number	9
Pages (from-to)	8022-8029
Number of pages	8
ISSN	1936-0851
DOIs	https://doi.org/10.1021/nn302628q
Publication status	Published - 25 Sept 2012

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title = "Graphene oxide as a monoatomic blocking layer",

abstract = "Monolayer graphene oxide (mGO) is shown to effectively protect molecular thin films from reorganization and function as an atomically thin barrier for vapor-deposited Ti/Al metal top electrodes. Fragile organic Langmuir-Blodgett (LB) films of C 22 fatty acid cadmium salts (cadmium(II) behenate) were covered by a compressed mosaic LB film of mGO flakes. These hybrid LB films were examined with atomic force microscopy (AFM) and X-ray reflectivity, both with and without the metal top electrodes. While the AFM enabled surface and morphology analysis, the X-ray reflectivity allowed for a detailed structural depth profiling of the organic film and mGO layer below the metal top layers. The structure of the mGO-protected LB films was found to be perfectly preserved; in contrast, it has previously been shown that metal deposition completely destroys the first two LB layers of unprotected films. This study provides clear evidence of the efficient protection offered by a single atomic layer of GO.",

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T1 - Graphene oxide as a monoatomic blocking layer

AU - Petersen, Søren Vermehren

AU - Glyvradal, Magni

AU - Bøggild, Peter

AU - Hu, Wenping

AU - Feidenhans'l, Robert Krarup

AU - Laursen, Bo Wegge

PY - 2012/9/25

Y1 - 2012/9/25

N2 - Monolayer graphene oxide (mGO) is shown to effectively protect molecular thin films from reorganization and function as an atomically thin barrier for vapor-deposited Ti/Al metal top electrodes. Fragile organic Langmuir-Blodgett (LB) films of C 22 fatty acid cadmium salts (cadmium(II) behenate) were covered by a compressed mosaic LB film of mGO flakes. These hybrid LB films were examined with atomic force microscopy (AFM) and X-ray reflectivity, both with and without the metal top electrodes. While the AFM enabled surface and morphology analysis, the X-ray reflectivity allowed for a detailed structural depth profiling of the organic film and mGO layer below the metal top layers. The structure of the mGO-protected LB films was found to be perfectly preserved; in contrast, it has previously been shown that metal deposition completely destroys the first two LB layers of unprotected films. This study provides clear evidence of the efficient protection offered by a single atomic layer of GO.

AB - Monolayer graphene oxide (mGO) is shown to effectively protect molecular thin films from reorganization and function as an atomically thin barrier for vapor-deposited Ti/Al metal top electrodes. Fragile organic Langmuir-Blodgett (LB) films of C 22 fatty acid cadmium salts (cadmium(II) behenate) were covered by a compressed mosaic LB film of mGO flakes. These hybrid LB films were examined with atomic force microscopy (AFM) and X-ray reflectivity, both with and without the metal top electrodes. While the AFM enabled surface and morphology analysis, the X-ray reflectivity allowed for a detailed structural depth profiling of the organic film and mGO layer below the metal top layers. The structure of the mGO-protected LB films was found to be perfectly preserved; in contrast, it has previously been shown that metal deposition completely destroys the first two LB layers of unprotected films. This study provides clear evidence of the efficient protection offered by a single atomic layer of GO.

U2 - 10.1021/nn302628q

DO - 10.1021/nn302628q

M3 - Journal article

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JO - A C S Nano

JF - A C S Nano

IS - 9

ER -

Graphene oxide as a monoatomic blocking layer

Abstract

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