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ÄúºÃ£¬×î½ü¿´ÎÄÏ×£¬¡°Fig. 4b shows the peak position variations of the two major peaks for the symmetric and asymmetric Ca¨CCb stretching vibrations (Fig. S5† . Evidently, except for the sample with the 3 wt% EGaddition, the additions of 3 to 5 wt% DMSO and of 5 to 9 wt% EG to PEDOT SS cause the symmetric and asymmetric Ca¨CCbstretching modes shi«àed to higher wavenumbers. These shi«às can be attributed to the changes in the electronic structure of PEDOT upon oxidation (doping) and rearrangement of the PEDOT chains from the coil-like benzoid structure to a more linear or extended quinoid structure as a result of the co-solvent addition.4,8,28 The expansion of chains is believed to cause the size increase in the PEDOT nanocrystals observed in the AFM images.¡± ÀÂüÖ÷·å²¢Ïò¸ß²¨ÊýÒÆ¶¯£¨±íÃ÷Óɱ½ÐÍÏòõ«Ð͵Äת±ä£©£¬ÄúÊÇÔÚÄÄÆªÎÄÏ׿´µ½ÀÂüÖ÷·åÏòµÍ²¨ÊýÒÆ¶¯£¨±íÃ÷Óɱ½ÐÍÏòõ«Ð͵Äת±ä£©£¿ |
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. Evidently, except for the sample with the 3 wt% EG
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