Thermal conductivity of nanofluids formed by carbon flurooxide mesoparticles

Mesoparticles with characteristic sizes larger than all known molecules and smaller than usual nanoparticles can easily penetrate inside living cells. Thus, they appear to be especially promising for cancer theranostic application. However, presence of mesoparticles can strongly perturb physico-chemical properties of the biological media in which they are incorporated, it is crucial to know a magnitude of such perturbations. For example, thermal properties of liquid solutions with dispersed mesoparticles are crucial for development of theranostic approaches based on photoacoustic effect. In this paper, thermal transport in nanofluids formed by carbon flurooxide (CFO) mesoparticles is reported. A significant non-linear enhancement of the thermal conductivity of the nanofluids (up to 85%, in comparison with initial basic liquids) depending on volume fraction of the dispersed CFO mesoparticles was found. It was revealed that the thermal conductivity rise can be explained by existence of interfacial layers between the mesoparticles and the hosting liquids.