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Place Amphi Dorothy Hodgkin
Title:
Photoresponsive molecular systems for advanced mechanical functions
Resume:
A molecular system with programmable and amplified mechanical functions in response to external stimuli has been one of the grand challenges in the field of artificial molecular machines. Herein, our attempts utilizing efficient transfer and collective motion from intra- and/or intermolecular interactions to deliver meaningful functions such as autonomous mechanical work, imaging, sensing, and patterning are introduced. Cholesteric liquid crystals containing photoisomerizable chiral azobenzene derivatives accompanying large conformational change could afford superstructural dynamic helical reorganization. It resulted in the phototunable mechanical motions such as unidirectional rotations of macroscopic objects and the accumulation of the rotational angles. Meanwhile, photopolymerizable diacetylenes exhibiting a transition of crystalline orientation from light-inert to the light-active state upon mechanical force were developed. This unique mechano- and photo-responsive system could provide novel functions such as pressure-controlled patterning and thermal conductivity.
You can find more information about Dr Yuan Kim here