Managing heat is a major challenge to meet
future demands for a sustainable use of our energy resources. This requires
materials, which can be custom-designed to exhibit specific
temperature-dependent thermal transport properties to become integrated into
thermal switches, transistors, or diodes. Common crystalline and amorphous
materials are not suitable, owing to their gradual changes of the
temperature-dependent thermal conductivity. We show how a second-order phase
transition fully controls the temperature-dependent thermal transport
properties of polymer materials. We demonstrate four major concepts based on a
colloidal superstructure: (i) control of transition temperature, (ii) width of
phase transition regime, (iii) multistep transitions, and (iv) step height of
the transition. Most importantly, this unique control over thermal conductivity
is only governed by the interparticle constriction, the particle composition,
and its mesostructure. Our concept is therefore also applicable to a wide
variety of other particulate materials.
Bibliography
Fabian A. Nutz, M. R. (17 de Nov de 2017). Tailor-made
temperature-dependent thermal conductivity via interparticle constriction. Materials Science, 3(11). Obtenido de
http://advances.sciencemag.org/content/3/11/eaao5238
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