1. Carbon Nanotubes What is that? Siegmar Roth Max Planck Institut f. Festkörperforschung and SINEUROP Nanotech GmbH Stuttgart (s.roth@fkf.mpg.de)

2. Carbon Nano Tubes

3. Carbon~

5. Snake Oil cures all deseases converts straw into gold burns permanently in lamp Solid State Version: Philosopher’s Stone (arcanum)

6. Carbon Black (is already as versatile as snake oil) Goes into car tires Cures bad stomach Used in painting and printing Helps watching eclipses of the sun …….. …….

7. ~nano~

8. ο νάννος = dwarf /Zwerg 10 -9 nano...nine...neun...novem Wavelenth of light: 10 -6, μ micrometer Interatomic distance: 1Å = 10 -10 m

9. ~tube

11. ~tube: 1.) Aspect Ratio = Length / Diameter 2.) no dangling bonds perfect surface no surface scattering ballistic transport 3.) hollow inside

12. Was sind Nanotubes? Besondere Russpartikel nahtlose Rohre aus graphitischem Kohlenstoff 1 nm Durchmesser mehrere µm lang Molekülphysik / Festkörperphysik

13. Mindestwissen: Single-Walled Multi-Walled Semiconducting Metallic Was sind Nanotubes?

14. CNTs inside: Völkl and Fraunhofer TEG

15. transparent flexibele Transistor

16. Fiber from Nanotubes: Bucky Yarn (ca. 100 μm thick, like human hair) Special Case Composite: Nanotubes + Binder (here binder is PVA)

17. Properties of individual CNTs Length: microns to millimeters, Diameter: 0.4 -100 nm Electrical conductivity: metallic (ballistic transport) semiconducting p-, n-doped or ambipolar (E gap ~1/d) mobility ~100 000 cm 2 /Vs (Si ~450 cm 2 /Vs) Operating current density > 10 10 A/cm 2 (Cu~ 10 6 A/cm 2 ) Thermal conductivity ~ 6000 W/Km (Cu~ 400W/Km) Gravimetric surface: > 1500 m 2 /g Density: ~ 1.4 g/cm 3 (Al~ 2.7 g/cm 3 ) High mechanical strength and high resilience Chemically inert Temperature stability: up to 2800°C in Vacuum, 600°C in air

18. The Price of 1 Nanotube: 1 tube contains about 10**5 atoms 12g --- 10**23 atoms --- 10**18 tubes 1g --- 1k € --- 10**17 tubes 1 tube costs about 10 f€

19. How to make carbon nanotubes: CVD Carbon Arc Laser Ablation

21. Real Nanotubes

22. How to maks networks: Dip coating of suspension Spraying of Suspension Electroplating CVD Growth on Surfaces Mixing into Polymers, Metals, Ceramics, …

23. Wet-chemical Synthesis of Supertuper Nanotube Transistor

24. SEM Image of Bucky Paper

25. AFM image of SWCNT over gold leads on Si chip, representing a „conventional“ carbon nanotube transistor

26. Schematic view of „conventional“ Carbon Nanotube Transistor

27. Vertical Nanotube Transistor (Patented by Infineon -and by Samsung ?!)

28. „All-Carbon“ Transistor

29. Wet-chemical synthesis of nanotube junctions

30. Dy@C 82 (Dy@C 82 ) n @nanotube Dy atom Metallofullerene Peapod

31. BMBF „INKONAMI“ Infineon

35. Summary Transistors, Sensors Vias and Interconnects Composites Transparent Conducting Films Supercapacitors Membranes for Fuel Cells Biocompatible Materials