상세정보
학술지
Electrical Evidence for the Encapsulation of C60 Inside a Carbon Nanotube: Random Telegraph Signal and Hysteric Current-voltage Characteristics
- 저자
- 유한영, 이동수, Ursula Dettlaff-Weglikowska, Siegmar Roth, 박영우
- 발행일
- 200810
- 출처
- Physical Review B : Condensed Matter and Materials Physics, v.78 no.15, pp.1-5
- ISSN
- 1098-0121
- 출판사
- American Physical Society(APS)
- 협약과제
- 08ZB1200, 정보통신 미래신기술연구사업(나노 기반 신개념 소자연구), 정태형
- 초록
- We present electrical evidence for the encapsulation of C60 's inside a carbon nanotube, random telegraph signals (RTSs), and hysteric current-voltage characteristics. RTSs are shown only at voltages higher than a critical voltage. We suggest that the origin of the RTSs is ascribed to the instability of the quantum harmonic oscillations of C60 's. RTSs are smeared out at a temperature which is well correlated with the energy level of the vibrational quantum mediated by the van der Waals binding between the carbon nanotube and C60 's. In addition, hysteric behavior in cyclic current-voltage characteristics is explained by the longitudinal motion and resettlement of the C60 's with the modulation of the size of the quantum dot mediated by the C60 insertion. © 2008 The American Physical Society.
- KSP 제안 키워드
- Carbon nano-tube(CNT), Critical Voltage, Harmonic oscillations, Longitudinal motion, Quantum Dot(QD), Random telegraph signal, current-voltage characteristics, energy levels, van der Waals