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Engineering Commons

Open Access. Powered by Scholars. Published by Universities.®

Purdue University

2009

ELECTRONIC-PROPERTIES; EPITAXIAL GRAPHENE; SILICON-CARBIDE; GRAPHITE; 6H-SIC(0001); LAYERS; FILMS

Articles 1 - 2 of 2

Full-Text Articles in Engineering

Graphene Formation Mechanisms On 4h-Sic(0001), Michael Bolen, Sara E. Harrison, Laura B. Biedermann, Michael A. Capano Sep 2009

Graphene Formation Mechanisms On 4h-Sic(0001), Michael Bolen, Sara E. Harrison, Laura B. Biedermann, Michael A. Capano

Birck and NCN Publications

Graphene is created through thermal decomposition of the Si face of 4H-SiC in high-vacuum. Growth temperature and time are varied independently to gain a better understanding of how surface features and morphology affect graphene formation. Growth mechanisms of graphene are studied by ex situ atomic force microscopy (AFM) and scanning tunneling microscopy (STM). On the route toward a continuous graphene film, various growth features, such as macroscale step bunching, terrace pits, and fingers, are found and analyzed. Topographic and phase AFM analysis demonstrates how surface morphology changes with experimental conditions. Step-bunched terraces and terrace pits show a strong preference for …


Graphene Formation Mechanisms On 4h-Sic(0001), Michael Bolen, Sara E. Harrison, Laura Biedermann, Michael A. Capano Sep 2009

Graphene Formation Mechanisms On 4h-Sic(0001), Michael Bolen, Sara E. Harrison, Laura Biedermann, Michael A. Capano

Birck and NCN Publications

Graphene is created through thermal decomposition of the Si face of 4H-SiC in high-vacuum. Growth temperature and time are varied independently to gain a better understanding of how surface features and morphology affect graphene formation. Growth mechanisms of graphene are studied by ex situ atomic force microscopy (AFM) and scanning tunneling microscopy (STM). On the route toward a continuous graphene film, various growth features, such as macroscale step bunching, terrace pits, and fingers, are found and analyzed. Topographic and phase AFM analysis demonstrates how surface morphology changes with experimental conditions. Step-bunched terraces and terrace pits show a strong preference for …