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

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Presentation on theme: "Super-aligned carbon nanotube film and its application in touch panels Shoushan Fan Department of Physics Tsinghua-Foxconn Nanotechnology Research Center."— Presentation transcript:

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

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

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

6 Carbon Nanotube Film Touch Panel CmHn 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 Truly Flexible Radius of flexture: 5mm CNT Film Fixing Frame Sliding Path: 120mm  Bending Test

8 Features of CNT Touch Panels Pen Pitting Durability TestScrape Durability Test Weight: 500g Pen size: 0.8mm (diameter) Frequency: 3 knocks/sec. Total: > 2 KK knocks (Pass) Knocked side: Film-side Weight: 500g Pen size: 0.8mm (diameter) Total: > 2 KK knocks (Pass) Scrape side: Film-side Function Test : PASS GLASS+FILM PMMA+FILM PMMA CNT-Sensor Pen Pitting Test PMMA CNT-Sensor Scrape Test CNT touch panels are durable

9 Features of CNT Touch Panels CNT Film LCD Polarization of light e CNT Film Polarization of light Nature light e CNT Film Polarization of light Parallel45 degreePerpendicular Parallel Perpendicular Optimized transparency for polarized light

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

11 Processing Comparison: CNT & ITO Forming filmsRaw materialsPatterning Dry pulling C m H n CVD C 30min NO Patterning CNT Vacuum Evaporation Sputtering Indium & Tin Mining Smelting Target preparation 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 m 2 cleanroom 2 million 4-7” CNT touch panels per month

14 CNT Touch Panel: Commercialization million CNT touch panels have been sold Will.i.am

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

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

17 CNT Papers: Mass Production Parallel layingCross laying Conducting Flexible Anti-corrosion High permeability Bio-compatible

18 Adv. Mater. 2012, 24, 2294 ; Adv. Funct. Mater., 2013, 23, 846 ; Nano Lett., 2013, 13, 818 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

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

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

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

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

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

24 Thank You 谢 谢谢 谢


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