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Electrical and Electromechanical Characteristics of Carbon Nanotube Resistors on Flexible Substrates

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ivria
14 diapositives · 281 Views · Sep 19, 2014

This paper discusses the fabrication and characterization of single-walled carbon nanotube (SWNT) thin-film resistors using layer-by-layer self-assembly techniques on plastic substrates. The properties of these SWNT films are thoroughly explored, showcasing their potential applications in MEMS/NEMS devices such as pressure sensors and accelerometers. Detailed experiments demonstrate the electrical performance and mechanical deformation sensitivity of the resistors, contributing valuable insights into the integration of nanomaterials for flexible electronics.

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Electrical and Electromechanical Characteristics of Carbon Nanotube Resistors on Flexible Substrates
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  1. ELECTRICAL AND ELECTROMECHANICAL CHARACTERISTICS OF NANOASSEMBLEDCARBON NANOTUBE THIN FILM RESISTORS ON FLEXIBLE SUBSTRATESWei Xue and Tianhong CuiDepartment of Mechanical Engineering, University of Minnesota, Minneapolis, USATransducers’07 Speaker: Wen-Fan Liao ID:g946220

  2. Outline • Introduction • Experiments • Device Characteristics • Conclusion • References

  3. Introduction • This paper report the fabrication of single-walled carbon nanotube (SWNT) thin-film on plastic substrates with layer-by-layer self-assembly • assemble SWNTs on flexible substrates and explore the properties of the SWNT thin films which are built with alternating layers of SWNTs and PDDA

  4. Experiments Polyelectrolytes(+) CNTs(-) naonoparticles Ref : T Cui and W Xue, “Assembling three-dimensional carbon nanotube-based cantilever arrays,” SPIE Newsroom 2007 Layer-by-layer self-assembly of polyelectrolytes/CNTs and polyelectrolytes/nanoparticles

  5. Experiments (PDDA/PSS)2 (PDDA/SWNT)n • (a) Structure of self-assembled SWNT multilayer thin film • (b) SEM image of assembled SWNTs Ref : W Xue and T Cui, “Deposition and characterization of layer-by-layer nano selfassembled carbon nanotube multilayer thin films” IEEE NEMS 2007 1μm

  6. Experiments • Schematic structure of a SWNT thin-film resistor built on a flexible substrate Cr/Au Ref : W Xue and T Cui, “Deposition and characterization of layer-by-layer nano selfassembled carbon nanotube multilayer thin films” IEEE NEMS 2007

  7. Experiments • (a) Flexed transparency film with prepatterned electrodes • (b) Transparency coated with 5 layers of SWNTs

  8. Experiments • 4156A Precision Semiconductor Parameter Analyzer • up to four probes • Measurements include I-V curve, Id-Vg graphs, etc Ref : http://www.ee.byu.edu/cleanroom/HP4156A.phtml

  9. Device Characteristics 6.37MΩ • Characteristics of SWNT thin-film resistors on flexible substrates 0.37MΩ 0.30MΩ 0.21MΩ 0.14MΩ R10 =6.37 MΩ R0 =1.35 MΩ Rn =(R0×R10)/[R0+(n-10) ×R10]

  10. Device Characteristics • Resistance versus mechanical deformation of SWNT thin-film resistors G14 = △R14/R14 = 38.2% G16 = △R16/R16 = 47.1%

  11. Device Characteristics • Schematic models for axial deformation of SWNT on different topographies

  12. Conclusion • demonstrated the fabrication and characterization of SWNT multilayer thin films on flexible substrates • MEMS/NEMS devices such as pressure sensors, accelerometers, and magnetic sensors have the potential to be developed and fabricated

  13. References • Wei Xue and Tianhong Cui, “Electrical and electromechanical characteristics of nano-assembled carbon nanotube thin film resistors on flexible substrates,” Transducers’07, Lyon, France, June 2007 • Wei Xue and Tianhong Cui, “Deposition and characterization of layer-by-layer nano selfassembled carbon nanotube multilayer thin films,” IEEE NEMS 2007, Bangkok, Thailand, pp. 371-376, January 2007 • Tianhong Cui and Wei Xue, “Assembling three-dimensional carbon nanotube-based cantilever arrays,” The International Society for Optical Engineering - SPIE Newsroom - Micro/Nano Lithography & Fabrication, http://spie.org/x17490.xml, DOI: 10.1117/2.1200710.0901, 2007 • http://www.ee.byu.edu/cleanroom/HP4156A.phtml

  14. ~Thank you for your attention~