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- Title
Conductive poly(3-hexylthiophene) nanofibers and single crystals covered by coily dielectric oligomers and distinctions between their structures developed by self-seeding and isothermal approaches.
- Authors
Agbolaghi, Samira; Zenoozi, Sahar; Abbasi, Farhang
- Abstract
Fuzzy nanofibers and single crystals developed using poly(3-hexylthiophene) (P3HT)- block-coily oligomers were compared. Based on grazing wide angle X-ray scattering and selected area electron diffraction patterns, grown crystalline structures were mainly edge-on. P3HT fuzzy nanofibers and single crystals were covered by the dielectric coily blocks of polystyrene, poly(methyl methacrylate), and poly(ethylene glycol), leading to brush-like regions on surface of crystals in longitude of P3HT backbones. The atomic force microscopy demonstrated that the single crystals grown by self-seeding method were significantly longer (26-181 µm) and thicker (59 nm-1.4 µm) than the corresponding nanofibers (0.8-21 µm in length and 1.5-23 nm in thickness). P3HT backbones were also more intimately stacked in single crystals in both hexyl side chains and π- π stacking directions, particularly in toluene (13.42-14.63 and 3.30-3.47 Ǻ) than in nanofibers (15.03-16.17 and 3.51-3.67 Ǻ). End coily blocks resulted in slightly higher layer spacings in both nanofibers and single crystals. Shorter P3HT chains were laminated on each other in single crystals; however, they were mostly extended in the nanofibers. Poorer solvents, lower crystallization temperatures, and shorter P3HT chains increased the backbone lamination in single crystals.
- Subjects
CONDUCTING polymers; THIOPHENES; NANOFIBERS; SINGLE crystals; DIELECTRIC materials; OLIGOMERS; ISOTHERMAL processes
- Publication
Journal of the Iranian Chemical Society, 2018, Vol 15, Issue 2, p381
- ISSN
1735-207X
- Publication type
Article
- DOI
10.1007/s13738-017-1239-1