한국진공학회:학술대회논문집 (Proceedings of the Korean Vacuum Society Conference)
- 한국진공학회 2015년도 제49회 하계 정기학술대회 초록집
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- Pages.109.1-109.1
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- 2015
Dissociative adsorption structure of guanine on Ge(100)
- Youn, Young-Sang (Nuclear Chemistry Research Division, Korea Atomic Energy Research Institute) ;
- Kim, Do Hwan (Division of Science Education, Daegu University) ;
- Lee, Hye Jin (Department of Chemistry and Green-Nano Materials Research Center, Kyungpook National University) ;
- Kim, Sehun (Molecular-Level Interface Research Center, Department of Chemistry, KAIST)
- 발행 : 2015.08.24
초록
Understanding the reaction mechanisms and structures underlying the adsorption of biomolecules on semiconductors is important for functionalizing semiconductor surfaces for various bioapplications. Herein, we describe the characteristic behavior of a primary nucleobase adsorbed on the semiconductor Ge(100). The adsorption configuration of guanine, a primary nucleobase found in DNA and RNA, on the semiconductor Ge(100) at an atomic level was investigated using scanning tunneling microscopy (STM) and density functional theory (DFT) calculations. When adsorbed on Ge(100) at room temperature, guanine appears dark in STM images, indicating that the adsorption of guanine on Ge(100) occurs through N-H dissociation. In addition, DFT calculations revealed that "N(1)-H dissociation through an O dative bonded structure" is the most favorable adsorption configuration of all the possible ones. We anticipate that the characterization of guanine adsorbed on Ge(100) will contribute to the development of semiconductor-based biodevices.