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. 2018 Jul 25;10(8):815. doi: 10.3390/polym10080815

Figure 2.

Figure 2

A schematic diagram of preparation of oriented rg-P3HT-TCB and ra-P3HT-TCB with fiber-like texture through a 1,3,5-trichlorobenzene (TCB) molecule epitaxy process. The mixture of rg-P3HT/TCB and ra-P3HT/TCB becomes a solvent after heating to 75 °C, and then the mixture cools down rapidly to 25 °C from one side to the other, forming a large temperature gradient. TCB solidified as a needle-like crystal along the temperature gradient. After doping and removing TCB, both of the rg-P3HT and ra-P3HT polymer chains formed a highly oriented structure.