Stiffness- and conformation-dependent polymer wrapping onto single-walled carbon nanotubes
| Autor: | Masanobu Naito, Hisanari Onouchi, Kazuyuki Nobusawa, Ken-ichiro Yasui, Atsushi Ikeda, Michiya Fujiki, Masashi Nakamura |
|---|---|
| Rok vydání: | 2008 |
| Předmět: |
chemistry.chemical_classification
Quantitative Biology::Biomolecules Chemistry Atomic force microscopy Physics::Medical Physics Stiffness Nanotechnology General Chemistry Carbon nanotube Polymer Biochemistry Catalysis law.invention Condensed Matter::Materials Science Colloid and Surface Chemistry Ultraviolet visible spectroscopy Differential scanning calorimetry Chemical engineering law Transmission electron microscopy medicine medicine.symptom |
| Zdroj: | Journal of the American Chemical Society. 130(49) |
| ISSN: | 0002-7863 |
| Popis: | This work reports the effect of stiffness and conformation of chain-like polymers on wrapping behaviors around single-walled carbon nanotubes (SWNT). As a model of chain-like polymers, three kinds of poly(dialkylsilane) (PSi)s with random-coiled, flexible, and semiflexible main chains were employed. Complexes of PSi and SWNT were prepared using mechanochemical high-speed vibration milling (HSVM). Stiffness-dependent polymer wrapping behaviors were investigated using combinational analyses with a differential scanning calorimeter, transmission electron microscopy, and atomic force microscopy. Furthermore, the conformational behaviors of the PSi's wrapped onto SWNTs were characterized spectroscopically with ordinary UV spectroscopy. Random-coiled and flexible PSi's were successfully wrapped onto small bundles of SWNTs, in which their conformations were changed to fit the surface curvatures of the SWNTs. However, semiflexible PSi could not form a complex with SWNTs, and its conformation remained unchanged even after the same HSVM process. Knowledge gained from this study may lead to a new approach to molecular design of chain-like polymers for efficient wrapping materials for SWNTs. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|