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Park, Je Wook
원자제어 저차원 전자계 연구단
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Graphene Nanoribbon Grids of Sub-10 nm Widths with High Electrical Connectivity

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Title
Graphene Nanoribbon Grids of Sub-10 nm Widths with High Electrical Connectivity
Author(s)
Kim, Namjo; Choi, Shinyoung; Yang, Seong-Jun; Jewook Park; Park, Jun-Ho; Nguyen, Nguyen Ngan; Park, Kwanghee; Ryu, Sunmin; Cho, Kilwon; Kim, Cheol-Joo
Publication Date
2021-06
Journal
ACS APPLIED MATERIALS & INTERFACES, v.13, no.24, pp.28593 - 28599
Publisher
American Chemical Society
Abstract
Quasi-one-dimensional (1D) graphene nanoribbons (GNRs) have finite band gaps and active edge states and therefore can be useful for advanced chemical and electronic devices. Here, we present the formation of GNR grids via seed-assisted chemical vapor deposition on Ge(100) substrates. Nucleation seeds, provided by unzipped C60, initiated growth of the GNRs. The GNRs grew toward two orthogonal directions in an anisotropic manner, templated by the single crystalline substrate, thereby forming grids that had lateral stitching over centimeter scales. The spatially uniform grid can be transferred and patterned for batch fabrication of devices. The GNR grids showed percolative conduction with a high electrical sheet conductance of ∼2 μS·sq and field-effect mobility of ∼5 cm2/(V·s) in the macroscopic channels, which confirm excellent lateral stitching between domains. From transconductance measurements, the intrinsic band gap of GNRs with sub-10 nm widths was estimated as ∼80 meV, similar to theoretical expectation. Our method presents a scalable way to fabricate atomically thin elements with 1D characteristics for integration with various nanodevices.
URI
https://pr.ibs.re.kr/handle/8788114/10583
DOI
10.1021/acsami.1c03437
ISSN
1944-8244
Appears in Collections:
Center for Artificial Low Dimensional Electronic Systems(원자제어 저차원 전자계 연구단) > 1. Journal Papers (저널논문)
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