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Spin dynamics in conducting poly(aniline)статья
- Авторы: Krinichnyi V.I., Nazarova I.B., Goldenberg L.M., Roth H.K.
- Журнал: Polymer Science, Series A
- Том: 40
- Номер: 8
- Год издания: 1998
- Издательство: Pleiades Publishing, Ltd
- Местоположение издательства: Road Town, United Kingdom
- Первая страница: 835
- Последняя страница: 843
- Аннотация: Two types of paramagnetic centers in slightly and medium doped poly(aniline) were detected by 3cm and 2-mm waveband EPR measurements. Spin-lattice and spin-spin relaxation times, as well as frequencies of the intra- and interchain motion of mobile centers were determined separately by a steady-state saturation technique in the temperature range 90-330 K. The charge transport in slightly doped poly(aniline) can be described within the framework of the Kivelson theory, while the process in moderately doped polymer proceeds predominantly by the mechanism of variable range hopping. It is shown that doping of the polymer leads to the formation of small polarons, which are the major paramagnetic charge carriers in metallike poly(aniline), and bipolarons. In the ultimately doped poly(aniline), the concentration of diamagnetic bipolarons may exceed the concentration of polarons.
- Добавил в систему: Криничный Виктор Иванович