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 FanDepartment of Physics

Tsinghua-Foxconn Nanotechnology Research Center Tsinghua University

Beijing, China

Tsinghua-Foxconn Nanotechnology Research CenterTsinghua University, Beijing, China

To make carbon nanotubes useful!

Reality and Dreams of Carbon Nanotubes

The Reality

The Dreams

Field emissionNanoelectronics

SensorsPhotonics

SPM probesComposites

To Make Carbon Nanotubes in OrderLaser

Arc discharge

Laser ablation

Breakthrough in Making Orderly CNTs

Science 283 (1999) 512

Radom Aligned Super-Aligned

Nature 419 (2002) 801

CNT Films

CNT Films and Unique Properties

Transparent,

Anisotropic

Conductivity,

Flexible,

Polarized

Free of catalyst

8” wafer 300m long film

8-inch wafer

Carbon Nanotube Film Touch Panel

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

Features of CNT Touch Panels

Truly Flexible

Radius of flexture: 5mmCNT Film

Fixing Frame

Sliding Path: 120mm

Bending Test

Pen Pitting Durability Test Scrape 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

PMMAPMMACNT-SensorCNT-Sensor

Pen Pitting Test

PMMAPMMACNT-SensorCNT-Sensor

Scrape Test

CNT touch panels are durable

CNT Film LCD

Polarization of light

CNT Film

Nature light

CNT Film

rizati

Polarizati

on of ligh

Parallel 45 degree Perpendicular

Parallel

Perpendicular

Optimized transparency for polarized light

Touch force sensing

Anti-inteference

Water proof

CNT ITO

Low reflectivity (3% less)

Processing Comparison: CNT & ITO

Forming filmsRaw materials Patterning

Dry pulling

CVD6000C 30min

NO Patterning

VacuumEvaporationSputtering

Indium & TinMining

SmeltingTarget

preparation

LithographEtching

Expensive facilitiesPollution

For making 100 million TP, CNT processing saves

9 million kwh of electricity and 1 million tons of water

8”- CNT Wafer: Mass Production

CNT Touch Panel: Mass Production

2,000 m2 cleanroom

2 million 4-7” CNT touch panels per month

CNT Touch Panel: Commercialization

2002 2005 20122008

25 million CNT touch panels have been sold

Will.i.am

SACNT Wafer: Potential Applications

Super aligned carbon nanotubesCarbon nanotubes with clean wall surface

No catalyst in CNT arraysEasy to be patterned and transferred

4-inch wafer8-inch wafer 12-inch Quartz wafer

Markets ?

CNT Wires: Ultrathin and Strong

CNT wires Cu coated CNT wires

Ultra-thin diameter, High tensile strength, High flexibility

Low weight, bio-compatible

CNT Papers: Mass Production

Parallel laying Cross laying

Conducting Flexible Anti-corrosion High permeability Bio-compatible

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

CNT-film

Polymer

CNT-film/Polymer Composite Actuators

Anisotropic conductivity

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

Thermo-Acoustic Effect: CNT Film Speaker

Nano Letters ， 8 (2008) 4539

Transparent, Flexible, Stretchable Speaker

CNT thermoacoustic chips

Nano Lett. 13 (2013) 4795

Prototype Samples of CNT Speaker

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

Acknowledgment

Thank You

谢谢

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

Documents

Aligned Small Diameter Single-Walled Carbon Nanotube ...bxw109120/QE_Proposal_BlakeWilson.pdf · The ﬁrst single walled carbon nanotubes were reported two years later in 1993 [13]

REPORT DOCUMENTATION PAGE Form Approved · ‘Carbon Nanotube Membranes for Pressure Retarded Osmotic Power Generation’ Statkraft Corporation, Oslo Norway June 5 2009 ‘Aligned

Fabrication of CeO2 nanotube supported Pt catalyst ... · Functionalizationwasof CeO2 or CeO2 nanotube@SiOwith Pt nanoparticles. For Pt/ CeO2 nanotube, 1.0 g of CeO2 nanotube were

Nanotube Supercapacitor

Aligned carbon nanotube morphogenesis predicts physical ...iys/Bharath_Nanoscale_2019.pdf · properties of the CNS themselves, scale eﬀects, and the ability to transfer these properties

A critical review on nanotube and nanotube/nanoclay related

Karbon Nanotube

Carbon Nanotube An Old Thing With New Name ?. Carbon nanotube ?

Aligned Boron Nitride Nanotube Forests for Thermal Management · Aligned Boron Nitride Nanotube Forests for Thermal ... Test matrix on modified rig 2 . ... Aligned Boron Nitride Nanotube

Engineering Vertically Aligned Carbon Nanotube …absolutenano.com/downloads/meshot_09_matrix.pdfa heated quartz pipe (4 mm i.d.) ... Using this decoupled system, ... gas analysis

Role of Nitrogen in the Synthesis of Vertically Aligned Carbon Nanotube

Nano-Scale Convective Heat Transfer of Vertically … Convective Heat Transfer of Vertically Aligned Carbon Nanotube Arrays A Major Qualifying Project Report Submitted to the Faculty

Vertically Aligned Carbon Nanotube-Sheathed Carbon Fibers as Pristine ...case.edu/cse/eche/daigroup/Journal Articles/2014/Xiang-2014... · Vertically Aligned Carbon Nanotube-Sheathed

Nonlinear viscoelasticity of freestanding and … · Nonlinear viscoelasticity of freestanding and polymer-anchored vertically aligned carbon nanotube foams Ludovica Lattanzi,1,2

Compressive response of vertically aligned carbon nanotube ...kiss.caltech.edu/papers/titan/papers/compressive.pdf · Compressive response of vertically aligned carbon nanotube

Aligned Small Diameter Single-Walled Carbon Nanotube Membranes for Reverse Osmosis Desalination Qualifying Examination Department of Chemistry The University

Synergetic effects of thin plies and aligned carbon nanotube …necstlab.mit.edu/sites/default/files/documents/Cohen... · 2019. 8. 30. · Synergetic effects of thin plies and aligned

Aligned Growth of Single-Walled and Double- Walled …...10 Aligned Growth of Single-Walled and Double-Walled Carbon Nanotube Films by Control of Catalyst Preparation Mineo Hiramatsu

Microstructured Vertically Aligned Carbon Nanotube Composites

Energy & Environmental Science · Improved eﬃciency of smooth and aligned single walled carbon nanotube/silicon hybrid solar cells† Xiaokai Li,a Yeonwoong Jung,b Kelsey Sakimoto,a