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research:carbon-nanostructures [2012/01/21 16:01]
Yen-Chia Chen
research:carbon-nanostructures [2012/01/21 16:02] (current)
Yen-Chia Chen
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A graphene nanoribbon (GNR) is a strip of graphene of width on the nanometer scale. The existence of the edges of GNRs makes them very different from bulk graphene. GNRs are predicted to have tunable energy gaps and magnetic properties, determined by the width and the edge geometry of GNRs. A graphene nanoribbon (GNR) is a strip of graphene of width on the nanometer scale. The existence of the edges of GNRs makes them very different from bulk graphene. GNRs are predicted to have tunable energy gaps and magnetic properties, determined by the width and the edge geometry of GNRs.
-Researchers at Crommie Research Group are interested in studying the physical properties of GNRs locally on the atomic scale. Scanning tunneling microscopy (STM) and spectroscopy (STS) are used to show the existence of the edges states and possible magnetism at the edges. They have also applied hydrogen plasma to control the edge terminals; In collaboration with theorists, the thermodynamics of the edge terminals are studied. Below is shown an STM constant current image at the edge of a GNR on gold.+Researchers at Crommie Research Group are interested in studying the physical properties of GNRs locally on the atomic scale. Scanning tunneling microscopy (STM) and spectroscopy (STS) are used to show the existence of the edges states and possible magnetism at the edges. They have also applied hydrogen plasma to control the edge terminals; In collaboration with theorists, the thermodynamics of the edge terminals are studied. Below is shown an STM constant current image of the edge of a GNR on a gold substrate.
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The study of graphene will deepen our understanding of related carbon systems and hold great promise for new generations of devices.  In the future, we hope to explore more unusual behaviors in graphene.  We will learn more about charge impurities in graphene, nanobubbles, and nanoribbons. The study of graphene will deepen our understanding of related carbon systems and hold great promise for new generations of devices.  In the future, we hope to explore more unusual behaviors in graphene.  We will learn more about charge impurities in graphene, nanobubbles, and nanoribbons.