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Title
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Towards chirality control of graphene nanoribbons embedded in hexagonal boron nitride
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Author
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Abstract
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| Oriented trenches are created in h-BN using different catalysts, and used as templates to grow seamlessly integrated armchair and zigzag graphene nanoribbons with chirality-dependent electrical and magnetic conductance properties. The integrated in-plane growth of graphene nanoribbons (GNRs) and hexagonal boron nitride (h-BN) could provide a promising route to achieve integrated circuitry of atomic thickness. However, fabrication of edge-specific GNRs in the lattice of h-BN still remains a significant challenge. Here we developed a two-step growth method and successfully achieved sub-5-nm-wide zigzag and armchair GNRs embedded in h-BN. Further transport measurements reveal that the sub-7-nm-wide zigzag GNRs exhibit openings of the bandgap inversely proportional to their width, while narrow armchair GNRs exhibit some fluctuation in the bandgap-width relationship. An obvious conductance peak is observed in the transfer curves of 8- to 10-nm-wide zigzag GNRs, while it is absent in most armchair GNRs. Zigzag GNRs exhibit a small magnetic conductance, while armchair GNRs have much higher magnetic conductance values. This integrated lateral growth of edge-specific GNRs in h-BN provides a promising route to achieve intricate nanoscale circuits. |
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Language
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English
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Source (journal)
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Nature materials. - London, 2002, currens
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Publication
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Berlin
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Nature research
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2020
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ISSN
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1476-1122
[print]
1476-4660
[online]
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DOI
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10.1038/S41563-020-00806-2
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Volume/pages
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p. 1-10
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ISI
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000571692500001
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Pubmed ID
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32958881
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Full text (Publisher's DOI)
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Full text (publisher's version - intranet only)
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