Coating of carbon nanotubes on flexible substrate and its adhesion study |
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Authors: | Abdelaziz Rahy Inga H Musselman Ya-Ping Sun |
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Institution: | a Department of Chemistry and The Alan G. MacDiarmid NanoTech Institute, The University of Texas at Dallas, 800 W. Campbell Road, BE26, Richardson, TX 75080-3021, United States b Department of Material Science and Engineering, KAIST, Republic of Korea c Department of Chemistry and Laboratory for Emerging Materials and Technology, Clemson University, Clemson, SC 29634-0973, United States |
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Abstract: | The primary goal of this project was to develop a flexible transparent conductor with 100 Ω/sq and 90% transmittance in the wavelength range of 400-700 nm on a flexible substrate. The best result achieved so far was 110 Ω/sq at 88% transmittance using purified single-walled carbon nanotubes (SWNTs) coated on a polyethylene naphthalate (PEN) substrate. The secondary goal was to simplify the overall coating procedure; we successfully reduced the process from five (prior art method) to three steps utilizing a sonication method. We also found that the use of metallic SWNTs significantly improved the conductivity and transmittance compared with the use of mixed SWNTs, i.e., unseparated SWNTs. Furthermore, a possible adhesion mechanism between SWNTs and the surface of PEN was studied; we concluded that a π-π stacking effect and a hydrophobic interaction are the major contributing factors for SWNTs to adhere to the surface of the substrate. |
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Keywords: | Conductive coating Flexible substrate Carbon nanotube Adhesion |
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