The influence of intercalated oxygen on the properties of graphene on polycrystalline Cu under various environmental conditions

被引：110

作者：

Blume, Raoul ^{[1
]}

Kidambi, Piran R. ^{[2
,3
]}

Bayer, Bernhard C. ^{[2
,4
]}

Weatherup, Robert S. ^{[2
]}

Wang, Zhu-Jun ^{[5
]}

Weinberg, Gisela ^{[5
]}

Willinger, Marc-Georg ^{[5
]}

Greiner, Mark ^{[5
]}

Hofmann, Stephan ^{[2
]}

Knop-Gericke, Axel ^{[5
]}

Schloegl, Robert ^{[5
]}

机构：

[1] Helmholtz Zentrum Berlin Mat & Energie, D-12489 Berlin, Germany

[2] Univ Cambridge, Dept Engn, Cambridge CB3 0FA, England

[3] MIT, Dept Mech Engn, Cambridge, MA 02139 USA

[4] Univ Vienna, Fac Phys, A-1090 Vienna, Austria

[5] Max Planck Gesell, Fritz Haber Inst, D-14195 Berlin, Germany

来源：

PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2014年 / 16卷 / 47期

基金：

英国工程与自然科学研究理事会; 欧洲研究理事会;

关键词：

X-RAY PHOTOEMISSION; ORIENTED PYROLYTIC-GRAPHITE; LIGHT-EMITTING-DIODES; PHOTOELECTRON-SPECTROSCOPY; ELECTRONIC-PROPERTIES; ACTIVATION-ENERGY; CARBON NANOTUBES; CHARGE-TRANSFER; COPPER; OXIDATION;

D O I：

10.1039/c4cp04025b

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Intercalation of oxygen at the interface of graphene grown by chemical vapour deposition and its polycrystalline copper catalyst can have a strong impact on the electronic, chemical and structural properties of both the graphene and the Cu. This can affect the oxidation resistance of the metal as well as subsequent graphene transfer. Here, we show, using near ambient pressure X-ray photoelectron spectroscopy (NAP-XPS), X-ray absorption near edge spectroscopy (XANES), energy dispersive X-ray spectroscopy (EDX) and (environmental) scanning electron microscopy (ESEM) that both the oxygen intercalation and de-intercalation are kinetically driven and can be clearly distinguished from carbon etching. The obtained results reveal that a charge transfer between as grown graphene and Cu can be annulled by intercalating oxygen creating quasi-free-standing graphene. This effect is found to be reversible on vacuum annealing proceeding via graphene grain boundaries and defects within the graphene but not without loss of graphene by oxidative etching for repeated (de-) intercalation cycles.

引用

页码：25989 / 26003

页数：15

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