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Broadband characterization of charge carrier transfer of hybrid graphene-deoxyribonucleic acid junctions

Authors
Lim, ChaehyunLee, Sang-HunJung, YoungmoSon, Joo-HiukChoe, Jong-HoKim, Young JuneChoi, JaebinBae, SukangKim, Jae HunBlick, Robert H.Seo, MinahKim, Chulki
Issue Date
4월-2018
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Keywords
Graphene; DNA; Fermi level; G-FET; Terahertz
Citation
CARBON, v.130, pp.525 - 531
Indexed
SCIE
SCOPUS
Journal Title
CARBON
Volume
130
Start Page
525
End Page
531
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/76627
DOI
10.1016/j.carbon.2018.01.049
ISSN
0008-6223
Abstract
The charge transfer dynamics regarding an intimate contact between graphene and single-stranded deoxyribonucleic acid (ssDNA) is investigated from DC to the THz-regime. A graphene field-effect transistor (G-FET) is immersed in ssDNA solutions where the adsorption of ssDNA is controlled in terms of absolute coverage. DC-response of the G-FET is recorded and cross-validated by observing changes in Raman spectroscopy and further investigating THz-time domain spectroscopy using a nano-slot antenna. We find very good agreement between electrical and optical approaches where the Fermi level of the ssDNA-adsorbed graphene depends on the coverage nonlinearly. The results point towards a new doping method with sub-nanoscale patterning precision on graphene and its electronic applications based on electronic junction properties. (c) 2018 Elsevier Ltd. All rights reserved.
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