کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1443377 | 1509455 | 2009 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Interactions of polarons in poly(3-dodecythiophene) at low temperature
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
بیومتریال
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Zero-field cooled-field-cooled (ZFC-FC) technique was used to investigate the effect of low temperature (4.6Â K) on the interactions of polarons in weakly FeCl3-doped poly(3-dodecylthiophene (PDDT). It was found that the magnetic properties of the system changed with the length of time system spent at low temperature: the Currie-Weiss paramagnetism gradually changed over to “antiferromagnetism” and ultimately to diamagnetism. This effect is connected with the thermochromic properties of self-organized PDDT in primary (10-15Â nm) or secondary (30-50Â nm) induced aggregates, in which cooling under the glass transition temperature Tg (â¼240Â K) causes extension of the effective conjugation length of coplanar polymer chains. Changes in magnetic properties are related to the inter- and intra-chain interactions of polaron states within both the primary and secondary induced aggregates.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Synthetic Metals - Volume 159, Issues 7â8, April 2009, Pages 613-618
Journal: Synthetic Metals - Volume 159, Issues 7â8, April 2009, Pages 613-618
نویسندگان
G. ÄÃk, L. DlháÅ, F. Å erÅ¡eÅ, T. PlecenÃk, I. ÄerveÅ,