The production of a cellular graphene array by scanning probe lithography and its ability to store electrical charge

A graphene cellular array on an insulating SiO2 layer was fabricated by scanning probe lithography. The graphene layer was oxidized by an electric field which was applied between the cantilever tip and Si substrate without any electrode directly connected to the graphene layer. When the bias voltage...

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Bibliographic Details
Published in:Carbon (New York) 2012-10, Vol.50 (12), p.4640-4647
Main Authors: Yong, Hyeondeuk, Kim, Kiyeol, Choi, Wooseok, Park, Joonkyu, Ahmad, Muneer, Seo, Yongho
Format: Article
Language:English
Subjects:
Arrays
Cellular
Charge
Cross-disciplinary physics: materials science
rheology
Decay
Electric fields
Exact sciences and technology
Fullerenes and related materials
diamonds, graphite
Graphene
Lithography
Materials science
Physics
Scanning
Specific materials
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Summary:A graphene cellular array on an insulating SiO2 layer was fabricated by scanning probe lithography. The graphene layer was oxidized by an electric field which was applied between the cantilever tip and Si substrate without any electrode directly connected to the graphene layer. When the bias voltage was applied on a cell of patterned graphene through the cantilever tip, charge was accumulated on the cell and preserved for a long time without decay. The accumulated charge and the surface potential were measured by an electrostatic force microscope. The charge retention was measured as a function of time, and the decay time constant was estimated to be ∼70min.
ISSN:0008-6223
1873-3891
DOI:10.1016/j.carbon.2012.05.051