Temperature-Driven Changes of the Graphene Edge Structure on Ni(111): Substrate vs Hydrogen Passivation

Atomic-scale description of the structure of graphene edges on Ni(111), both during and post growth, is obtained by scanning tunneling microscopy (STM) in combination with density functional theory (DFT). During growth, at 470 °C, fast STM images (250 ms/image) evidence graphene flakes anchored to t...

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Veröffentlicht in:	Nano letters 2015-01, Vol.15 (1), p.56-62
Hauptverfasser:	Patera, Laerte L, Bianchini, Federico, Troiano, Giulia, Dri, Carlo, Cepek, Cinzia, Peressi, Maria, Africh, Cristina, Comelli, Giovanni
Format:	Artikel
Sprache:	eng
Schlagworte:	Density functional theory Detaching Flakes Frozen Graphene Hydrogen storage Scanning tunneling microscopy
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creator	Patera, Laerte L Bianchini, Federico Troiano, Giulia Dri, Carlo Cepek, Cinzia Peressi, Maria Africh, Cristina Comelli, Giovanni
description	Atomic-scale description of the structure of graphene edges on Ni(111), both during and post growth, is obtained by scanning tunneling microscopy (STM) in combination with density functional theory (DFT). During growth, at 470 °C, fast STM images (250 ms/image) evidence graphene flakes anchored to the substrate, with the edges exhibiting zigzag or Klein structure depending on the orientation. If growth is frozen, the flake edges hydrogenate and detach from the substrate, with hydrogen reconstructing the Klein edges.
doi_str_mv	10.1021/nl5026985
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subjects	Density functional theory Detaching Flakes Frozen Graphene Hydrogen storage Scanning tunneling microscopy
title	Temperature-Driven Changes of the Graphene Edge Structure on Ni(111): Substrate vs Hydrogen Passivation
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