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Super-aligned carbon nanotube film and its application in touch panels Shoushan Fan

Super-aligned carbon nanotube film and its application in touch panels Shoushan Fan Department of Physics Tsinghua-Foxconn Nanotechnology Research Center Tsinghua University Beijing, China. Tsinghua-Foxconn Nanotechnology Research Center Tsinghua University, Beijing, China. GOAL.

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Super-aligned carbon nanotube film and its application in touch panels Shoushan Fan

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  1. Super-aligned carbon nanotube film and its application in touch panels Shoushan Fan Department of Physics Tsinghua-Foxconn Nanotechnology Research Center Tsinghua University Beijing, China

  2. Tsinghua-Foxconn Nanotechnology Research Center Tsinghua University, Beijing, China GOAL To make carbon nanotubes useful!

  3. CVD Laser ablation Arc discharge Ar Laser C-H Reality and Dreams of Carbon Nanotubes The Reality The Dreams To Make Carbon Nanotubes in Order Field emission Nanoelectronics Sensors Photonics SPM probes Composites …

  4. Breakthrough in Making Orderly CNTs CNT Films Aligned Super-Aligned Radom Science 283 (1999) 512 Nature 419 (2002) 801

  5. CNT Films and Unique Properties 8-inch wafer 1cm 8” wafer 300m long film Transparent, Anisotropic Conductivity, Flexible, Polarized Free of catalyst

  6. Carbon Nanotube Film Touch Panel CmHn • Advantages • Replacing indium with carbon • Truly flexible and durable, • Suitable for 3-D molding • No photolithography, due to anisotropic conductivity • High transparency, due to polarization of the CNT film Advanced Functional Materials, 20 (2010) 885; 21 (2011) 2721

  7. Features of CNT Touch Panels • Bending Test Fixing Frame CNTFilm Radius of flexture: 5mm Truly Flexible Sliding Path: 120mm

  8. Features of CNT Touch Panels CNT touch panels are durable Pen Pitting Test Scrape Test GLASS+FILM PMMA+FILM CNT-Sensor CNT-Sensor PMMA PMMA

  9. Features of CNT Touch Panels Optimized transparency for polarized light Nature light e e CNT Film LCD CNTFilm Polarization of light Perpendicular Polarization of light Parallel Polarization of light Polarization of light Polarization of light CNTFilm Parallel 45 degree Perpendicular

  10. Features of CNT Touch Panels CNT ITO Water proof Low reflectivity (3% less) Touch force sensing Anti-inteference

  11. Processing Comparison: CNT & ITO Raw materials Forming films Patterning CmHn CVD CNT NO Patterning Dry pulling 6000C 30min Indium & Tin Mining Smelting Target preparation Vacuum Evaporation Sputtering Lithograph Etching Expensive facilities Pollution ITO For making 100 million TP, CNT processing saves 9 million kwh of electricity and 1 million tons of water

  12. 8”- CNT Wafer: Mass Production

  13. CNT Touch Panel: Mass Production 2,000 m2 cleanroom 2 million 4-7” CNT touch panels per month

  14. CNT Touch Panel: Commercialization 2002 2005 2008 2012 Will.i.am 25 million CNT touch panels have been sold

  15. 8-inch wafer 4-inch wafer SACNT Wafer: Potential Applications 12-inch Quartz wafer Super aligned carbon nanotubes Carbon nanotubes with clean wall surface No catalyst in CNT arrays Easy to be patterned and transferred Markets ?

  16. CNT Wires: Ultrathin and Strong Ultra-thin diameter,High tensile strength, High flexibility Low weight, bio-compatible Cu coated CNT wires CNT wires

  17. CNT Papers: Mass Production Parallel laying Cross laying ConductingFlexibleAnti-corrosion Highpermeability Bio-compatible

  18. CNT films for Lithium Ion Batteries Conductive network Structural scaffold Lightweight and flexible CNT film current collectors • Flexible and high strength • Better rate performance and excellent cycling • Lightweight and higher energy density Adv. Mater. 2012, 24, 2294 ; Adv. Funct. Mater., 2013, 23, 846 ; Nano Lett., 2013, 13, 818

  19. CNT-film/Polymer Composite Actuators Polymer CNT-film Anisotropic conductivity

  20. Carbon Nanotube Film Heating Devices Polarized light Micro-heater array Flexible heater Uniform heating Flexibility Fast temperature response Addressable micro-heater arrays Looking for Real Applications Advanced Materials, 21( 2009) 3563

  21. Thermo-Acoustic Effect: CNT Film Speaker Transparent, Flexible, Stretchable Speaker Nano Letters，8 (2008) 4539

  22. Prototype Samples of CNT Speaker CNT thermoacoustic chips Nano Lett. 13 (2013) 4795

  23. Acknowledgment • National Basic Research Program of China • National Science Foundation of China • Foxconn Technology Group

  24. Thank You 谢 谢

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