Broadband characterization of charge carrier transfer of hybrid graphene-deoxyribonucleic acid junctions
| Autor: | Jae Hun Kim, Young June Kim, Youngmo Jung, Jong-Ho Choe, Robert H. Blick, Sukang Bae, Joo-Hiuk Son, Chaehyun Lim, Sang-Hun Lee, Jaebin Choi, Minah Seo, Chulki Kim |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Graphene business.industry Fermi level Doping Transistor 02 engineering and technology General Chemistry 021001 nanoscience & nanotechnology 01 natural sciences law.invention symbols.namesake Adsorption law 0103 physical sciences symbols Optoelectronics General Materials Science Charge carrier 010306 general physics 0210 nano-technology Raman spectroscopy business Spectroscopy |
| Zdroj: | Carbon. 130:525-531 |
| ISSN: | 0008-6223 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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