Reorientation and translation of individual dye molecules in a polymer matrix

@article{schob04, abstract = {The orientational and translational motion of individual dye molecules embedded in a polymer matrix is studied in the temperature regime above the glass transition. The rotational diffusion close to the glass transition is heterogeneous on the single molecule level and few sudden changes in the reorientational speed of single molecules are found. The exchange between these reorientational speeds is found to be one order of magnitude slower than the reorientational time constant of the molecules. Translational motion can be clearly identified at about 1.2 Tg. However, the translational diffusion shows no signs of heterogeneity on the timescale of our experiments, from which we conclude, that the timescale of the exchange process between microenvironments has become too fast or that no heterogeneity exists at the temperatures above 1.2 Tg.}, author = {Schob, A. and Cichos, F. and Schuster, J. and von Borczyskowski, C. }, booktitle = {Selected papers from the 3rd International Conference on Scanning Probe Microscopy of Polymers}, citeulike-article-id = {1998280}, doi = {10.1016/j.eurpolymj.2004.01.016}, journal = {European Polymer Journal}, keywords = {dyn-het, polymer, rotation}, month = {May}, number = {5}, pages = {1019--1026}, posted-at = {2007-11-28 00:34:40}, priority = {3}, title = {Reorientation and translation of individual dye molecules in a polymer matrix}, url = {http://dx.doi.org/10.1016/j.eurpolymj.2004.01.016}, volume = {40}, year = {2004} }

TY - JOUR ID - schob04 L3 - citeulike-article-id:1998280 TI - Reorientation and translation of individual dye molecules in a polymer matrix T2 - Selected papers from the 3rd International Conference on Scanning Probe Microscopy of Polymers JF - European Polymer Journal VL - 40 IS - 5 SP - 1019 EP - 1026 N2 - The orientational and translational motion of individual dye molecules embedded in a polymer matrix is studied in the temperature regime above the glass transition. The rotational diffusion close to the glass transition is heterogeneous on the single molecule level and few sudden changes in the reorientational speed of single molecules are found. The exchange between these reorientational speeds is found to be one order of magnitude slower than the reorientational time constant of the molecules. Translational motion can be clearly identified at about 1.2 Tg. However, the translational diffusion shows no signs of heterogeneity on the timescale of our experiments, from which we conclude, that the timescale of the exchange process between microenvironments has become too fast or that no heterogeneity exists at the temperatures above 1.2 Tg. KW - dyn-het KW - polymer KW - rotation AU - Schob, A AU - Cichos, F AU - Schuster, J AU - von Borczyskowski, C PY - 2004/05// UR - http://dx.doi.org/10.1016/j.eurpolymj.2004.01.016 ER -