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

Title
Broadband characterization of charge carrier transfer of hybrid graphene-deoxyribonucleic acid junctions
Authors
김재헌김철기서민아최재빈배수강임채현정영모김영준이상훈손주혁최종호Robert H. Blick
Keywords
Graphene; DNA; Fermi level; G-FET; Terahertz
Issue Date
2018-04
Publisher
Carbon
Citation
VOL 130-531
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.
URI
http://pubs.kist.re.kr/handle/201004/68270
ISSN
0008-6223
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KIST Publication > Article
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