Effect of Morphology and Crystal Structure on the Thermal Conductivity of Titania Nanotubes.

ABSTRACT: Titania nanotubes (TNTs) with different morphology and crystal structure are prepared by chemical processing and rapid breakdown anodization (RBA) methods. The nanotubes are studied in terms of thermal conductivity. The TNTs with variable wall thickness below 30 nm have significantly reduced thermal conductivity than bulk titania, due to the phonon confinement, smaller phonon mean free path, and enhanced phonon boundary scattering. The amorphous nanotubes (TNT_Amor) have comparatively thicker walls than both crystalline nanotubes. The TNT_Amor has a thermal conductivity of 0.98 W m^-1 K^-1, which is slightly less than the thermal conductivity of crystalline anatase nanotubes (TNT_A; 1.07 W m^-1 K^-1). However, the titani

SUBMITTER: Ali S 

PROVIDER: S-EPMC6047950 | biostudies-literature | 2018 Jul

REPOSITORIES: biostudies-literature