Thermal transport properties of an oriented thin film of a paraffinic tripodal triptycene

Abstract

Using a molecular engineering technique based on a tripodal triptycene-based supramolecular scaffold capable of precisely controlling molecular orientation on solid substrates, in combination with a time-domain thermoreflectance (TDTR) measurement technique, we evaluate thermal transport properties of a highly oriented long alkyl chain at the nanoscale. In the TDTR measurements, a 54 nm thick film, in which two-dimensional alkyl-chain domains are stacked horizontally to the substrate surface, showed a value of out-of-plane thermal conductivity (0.21 ± 0.04 W · m^–1 · K^–1), which is in a similar range as those reported for other organic and polymer materials.