title: An analysis of the effects of temperature and structural arrangements on the thermal conductivity and thermal diffusivity of tropocollagen-hydroxyapatite interfaces.
abstract: The ability of a biomaterial to transport energy by conduction is best characterized in the steady state by its thermal conductivity and in the non-steady state by its thermal diffusivity. The complex hierarchical structure of most biomaterials makes the direct determination of the thermal diffusivity and thermal conductivity difficult using experimental methods. This study presents a classical molecular simulation based approach for the thermal diffusivity and thermal conductivity prediction for a set of tropocollagen and hydroxyapatite based idealized biomaterial interfaces. The thermal diffusivity and thermal conductivity values are calculated using the presented approach at three different temperatures (300 K, 500 K and 700 K). The effects of temperature, structural arrangements, and size of simulated systems on the thermal properties are analyzed. Analyses point out important role played by the interface orientation, interface area, and structural hierarchy. Ensuing discussions establish that the interface structural arrangement and interface orientation combined with biomimetic structural hierarchy can lead to non-intuitive thermal property variations as a function of structural features.
authors.affiliation: School of Aeronautics and Astronautics, Purdue University, IN 47907, USA.
authors.forename: Tao
authors.initials: T
authors.lastname: Qu
authors.affiliation: School of Aeronautics and Astronautics, Purdue University, IN 47907, USA. Electronic address: tomar@purdue.edu.
authors.forename: Vikas
authors.initials: V
authors.lastname: Tomar
mesh_terms: D004058:Diffusion; D017886:Durapatite / Q000737:chemistry*; D005857:Germanium / Q000737:chemistry; D056004:Molecular Dynamics Simulation; D053761:Nanocomposites / Q000737:chemistry; D060739:Phonons; D012825:Silicon / Q000737:chemistry; D013696:Temperature; D013814:Thermal Conductivity; D013997:Time Factors; D014332:Tropocollagen / Q000737:chemistry*
chemical_list: D014332:Tropocollagen; D005857:Germanium; D017886:Durapatite; D012825:Silicon
keywords: Hydroxyapatite; Molecular dynamics; Thermal conductivity; Thermal diffusivity; Tropocollagen