Structural Stability of Transparent Conducting Films Assembled from Length Purified Single-Wall Carbon Nanotubes
| Autor: | Ganjigunte R. S. Iyer, Jeffrey A. Fagan, Ji Yeon Huh, Steven D. Hudson, Jan Obrzut, Jack F. Douglas, Christopher M. Stafford, Daneesh O. Simien, John M. Harris, Jun Young Chung, Erik K. Hobbie |
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| Rok vydání: | 2011 |
| Předmět: |
chemistry.chemical_classification
Materials science chemistry.chemical_element Nanotechnology Carbon nanotube Polymer Microstructure Surfaces Coatings and Films Electronic Optical and Magnetic Materials law.invention Dielectric spectroscopy General Energy chemistry law Microscopy Physical and Theoretical Chemistry Composite material Carbon Sheet resistance Transparent conducting film |
| Zdroj: | The Journal of Physical Chemistry C. 115:3973-3981 |
| ISSN: | 1932-7455 1932-7447 |
| DOI: | 10.1021/jp200250j |
| Popis: | Single-wall carbon nanotube (SWCNT) films show significant promise for transparent electronics applications that demand mechanical flexibility, but durability remains an outstanding issue. In this work, thin membranes of length purified single-wall carbon nanotubes (SWCNTs) are uniaxially and isotropically compressed by depositing them on prestrained polymer substrates. Upon release of the strain, the topography, microstructure, and conductivity of the films are characterized using a combination of optical/fluorescence microscopy, light scattering, force microscopy, electron microscopy, and impedance spectroscopy. Above a critical surface mass density, films assembled from nanotubes of well-defined length exhibit a strongly nonlinear mechanical response. The measured strain dependence reveals a dramatic softening that occurs through an alignment of the SWCNTs normal to the direction of prestrain, which at small strains is also apparent as an anisotropic increase in sheet resistance along the same directio... |
| Databáze: | OpenAIRE |
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