Optimizing dynamic degrees of freedom of solution-processed semiconducting polymers to form long-range order
摘要
A comprehensive methodology of ordering solution-processed semiconducting polymers is presented, correlating solvent, solute, and substrate interactions in an intermolecular framework. Utilizing temperature-dependent UV–VIS absorption, we reveal a reversible phase transition between unguidable 2D aggregates and guidable quasi-3D bundles, enabling directional molecular assembly along nano-templated self-assembled monolayers (nSAMs). Within an optimized dynamic length scale 2.5 Å between weakly bonded polymer bundles and nSAMs, random polymer fibers can be transformed into unidirectional fibers with increased molecular anisotropy from 1.0 to 9.2, verified by atomic force microscopy and polarized Raman scattering. Intermolecular dynamics are quantitatively manipulated with angstrom-level precision to achieve macroscopic order.
Graphical Abstract