Resolving Hierarchical Structures in Carbon Nanotube Networks Using Small- and Ultrasmall-Angle Neutron Scattering
| Autor: | Mehran Tehrani, Mark Dadmun, Thusitha Etampawala, Mohammad Abir Hossain |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Materials science
Nanocomposite Composite number Nanotechnology 02 engineering and technology Carbon nanotube Neutron scattering 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Small-angle neutron scattering 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials law.invention General Energy Chemical engineering PEDOT:PSS law Dispersion (optics) Nanometre Physical and Theoretical Chemistry 0210 nano-technology |
| Zdroj: | The Journal of Physical Chemistry C. 121:22442-22451 |
| ISSN: | 1932-7455 1932-7447 |
| DOI: | 10.1021/acs.jpcc.7b06114 |
| Popis: | Resolving hierarchical structures in carbon nanotube (CNT) composites is crucial for their performance optimization. We report here that self-consistent analyses of small- and ultra-small-angle neutron scattering (SANS and USANS, respectively) patterns can be used to extract both the size and morphology of the hierarchical structures in carbon nanotube networks. In particular, this study investigates the correlation of structure and electrical conductivity of CNT-PEDOT:PSS (poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate)) composite films where distinguishable dispersion states of nanotubes in the PEDOT:PSS matrix were achieved by varying the CNT concentration, duration of sonication, and addition of ethylene glycol (EG) to the pre-deposition solutions. It was concluded that five hierarchical levels of structure, spanning a few nanometers to tens of microns, exist in all samples. The results suggest a strong variation in the structure of the nanocomposites at larger length scales and, to a lesser e... |
| Databáze: | OpenAIRE |
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