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Wayne State University

2012

Graphene nanoribbon

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The Electrical Transport Study Of Graphene Nanoribbons And 2d Materials Beyond Graphene, Ming-Wei Lin Jan 2012

The Electrical Transport Study Of Graphene Nanoribbons And 2d Materials Beyond Graphene, Ming-Wei Lin

Wayne State University Dissertations

The electrical transport measurements on a suspended ultra-low-disorder graphene nanoribbon (GNR) with nearly atomically smooth edges that reveal a high mobility exceeding 3000 cm2 V-1 s-1 and an intrinsic bandgap was reported in this study. The experimentally derived bandgap is in quantitative agreement with the results of our electronic-structure calculations on chiral GNRs with comparable width taking into account the electron-electron interactions, indicating that the origin of the bandgap in non-armchair GNRs is partially due to the magnetic zigzag edges. In addition, electrical transport measurements show that current-annealing effectively removes the impurities on the suspended graphene nanoribbons, uncovering the intrinsic …