Eunkyoung Kim
Yonsei University, South Korea
Title: Photothermal thin films from conductive polymers for programmable bilayers
Biography
Biography: Eunkyoung Kim
Abstract
The conversion of photons to heat in the conductive polymer films causes local heating to increase temperature at the light exposed area. The resultant heat can be converted into other type of energy such as electrical, mechanical, or chemical energy. In particular the photothermal energy conversion into mechanical energy gives a unique method for reversible change of a 2 dimensional to 3 dimensional structure on command. The challenge is the design of the photothermal architecture of the conductive polymer layer and their integration into a device, to optimize the light-to-heat-to-energy conversion efficiency as well as to maximize the long-term stability of the integrated system exposed to the light. Herein we present programmable bilayers prepared from conjugated polymers which was transferred onto a soft polymeric film, to form a bimorph. The resultant 2D programmable bilayers were reversibly folded into a 3 D structure through photothermal stimuli, to afford biomimetic 3 D structures. Effect of the chemical structure and composition in the bimorph on the sensitivity of structural conversion will be discussed.