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Carbon Nanotubes What is that? Siegmar Roth Max Planck Institut f. Festkörperforschung and SINEUROP Nanotech GmbH Stuttgart

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Presentation on theme: "Carbon Nanotubes What is that? Siegmar Roth Max Planck Institut f. Festkörperforschung and SINEUROP Nanotech GmbH Stuttgart"— Presentation transcript:

1 Carbon Nanotubes What is that? Siegmar Roth Max Planck Institut f. Festkörperforschung and SINEUROP Nanotech GmbH Stuttgart

2 Carbon Nano Tubes

3 Carbon~

4

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 nano...nine...neun...novem Wavelenth of light: 10 -6, μ micrometer Interatomic distance: 1Å = m

9 ~tube

10

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: nm Electrical conductivity: metallic (ballistic transport) semiconducting p-, n-doped or ambipolar (E gap ~1/d) mobility ~ cm 2 /Vs (Si ~450 cm 2 /Vs) Operating current density > 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 **23 atoms **18 tubes 1g --- 1k € **17 tubes 1 tube costs about 10 f€

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

20

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 atom Metallofullerene Peapod

31 BMBF „INKONAMI“ Infineon

32

33

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


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