Journal
EUROPEAN PHYSICAL JOURNAL E
Volume 35, Issue 12, Pages -Publisher
SPRINGER
DOI: 10.1140/epje/i2012-12129-3
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Funding
- UK EPSRC [EP/F0164331, EP/I028641/1]
- Diamond Light Source [MT1203]
- EPSRC [EP/I028641/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/I028641/1] Funding Source: researchfish
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We report surface and interface effects in dynamics and chain conformation in the thin film of conjugated polymer PCDTBT. To probe dynamic anomalies, we measure the glass transition temperature (T-g) of PCDTBT films as a function of thickness, and find that there is a significant depression in T-g for films less than 100nm thick; a result qualitatively similar to that observed in many other polymer film systems. However, for films less than 40 nm, the T-g converges to a constant value of 20K below its bulk value. Grazing incidence X-ray diffraction shows depth-dependent molecular organization that is associated with the unusual thickness-dependent dynamics.
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