期刊
ADVANCED FUNCTIONAL MATERIALS
卷 25, 期 6, 页码 920-927出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.201403708
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资金
- Georgia Institute of Technology
- National Science Foundation [CBET 1264555]
- Div Of Chem, Bioeng, Env, & Transp Sys
- Directorate For Engineering [1264555] Funding Source: National Science Foundation
Self-assembly of conjugated organic semiconductors into ordered, larger scale entities is a critical process to achieve efficient charge transport at the nano-through macro-scales, and various methodologies aimed at enhancing molecular ordering have been introduced. However, mechanistic understanding is limited. Here, a mechanistic elucidation of poly(3-hexylthiophene) (P3HT) molecular self-assembly is proposed based on experimental demonstration of controlled, solution-based P3HT self-assembly into rod-like polycrystalline nanostructures. The synergistic combination of nonsolvent addition and ultrasonication facilitates rod-like P3HT nanostructure formation in solution. Importantly, through sequential application of both treatments, nanostructure length can be easily modulated, and the assembly process is shown to follow a simple 2-step crystallization model, which depends upon nucleation followed by growth. Through arrays of experimental results, the validity of 2-step crystallization is confirmed and is proposed as a comprehensive platform to understand self-assembly processes of conjugated polymers into larger, ordered mesoscale entities.
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