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Assembly of non-ionic templates is induced by a sharp thermal gradient; the movement of this temperature gradient nucleates a growth front of the self-assembled structure. This provides directionality to the assembled structure and ultimately the nanopores templated by the molecule. However for anisotropic structures like cylinders, the orientation of this aligned structure can be controlled by the speed that the temperature gradient moves across the surface.
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This page is a summary of: Facile control of long range orientation in mesoporous carbon films with thermal zone annealing velocity, Nanoscale, January 2013, Royal Society of Chemistry,
DOI: 10.1039/c3nr03591c.
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