Broadband characterization of charge carrier transfer of hybrid graphene-deoxyribonucleic acid junctions
- Broadband characterization of charge carrier transfer of hybrid graphene-deoxyribonucleic acid junctions
- 김재헌; 김철기; 서민아; 최재빈; 배수강; 임채현; 정영모; 김영준; 이상훈; 손주혁; 최종호; Robert H. Blick
- Graphene; DNA; Fermi level; G-FET; Terahertz
- Issue Date
- VOL 130-531
- 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.
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