1. Defects and metallic contacts involving carbon nanotubes Jisoon Ihm School of Physics, Seoul National University, Korea

2. Effects of metallic contact on conductance of CNT

3. (5,5) CNT with a Stone-Wales defect (without metallic electrode)

5. Atomic model (Au cluster + (5,5) CNT with SW + Au cluster)

6. Conductance plot with V bias = 0.0 V Fermi level = 0.0 For small voltage (≤ 0.1 V), ideal CNT : 1.0 G 0 (effect of single gold contact: 3 KΩ), CNT with SW : 0.93 G 0

7. Conductance plot with V bias = 1.0 V ideal CNT : 0.5 G 0 (effect of single gold contact: 10 KΩ) CNT with SW : 0.49 G 0

8. Conductance plot with V bias = 1.5 V Energy (eV) ideal CNT : 0.5 G 0 (effect of single gold contact: 10 KΩ) CNT with SW : 0.49 G 0

9. Atomic model (Au cluster + (5,5) CNT with SW + Au cluster)

10. broad gold electrode narrow gold electrode

11. Broad gold contact For small voltage (≤ 0.1 V), ideal CNT : 1.6 G 0 (effect of single gold contact: 0.83 KΩ) CNT with SW : 1.55 G 0 For large voltage (~ 1 V), ideal CNT : 0.7 G0 (effect of single gold contact: 6 KΩ) CNT with SW : 0.7 G0 Semiconducting CNT–Gold resistance : 15 K Ω (Ohmic contact) ( McEuen Group, PRL 92, 046401 (2004) )

12. Summary of gold contact Gold contact gives additional resistance of ~ KΩ. Precise contact resistance is sensitive to the contact configuration.