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Broadband characterization of charge carrier transfer of hybrid graphene-deoxyribonucleic acid junctions
- Authors
- Lim, Chaehyun; Lee, Sang-Hun; Jung, Youngmo; Son, Joo-Hiuk; Choe, Jong-Ho; Kim, Young June; Choi, Jaebin; Bae, Sukang; Kim, Jae Hun; Blick, Robert H.; Seo, Minah; Kim, Chulki
- Issue Date
- Apr-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
- 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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