Accession Number : AD1011810


Title :   Elucidating the Wavelength Dependence of Phonon Scattering in Nanoparticle-Matrix Composites using Phonon Spectroscopy


Descriptive Note : Technical Report,27 Mar 2013,31 Mar 2016


Corporate Author : Arizona State University Tempe United States


Personal Author(s) : Wang,Robert


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/1011810.pdf


Report Date : 11 Jul 2016


Pagination or Media Count : 43


Abstract : This project examined thermal transport and phonon transport in three types of nanoparticle-matrix composites: (i) semiconductor nanoparticles randomly distributed within a semiconductor matrix, (ii) semiconductor nanoparticles embedded in molecular matrices of varying composition, and (iii) nanoparticles periodically-arranged inside of a molecular matrix. This project specifically focused on colloidal nanocrystals (NCs), which are a type of nanoparticle that consists of an inorganic crystalline core with ligands bound to the surface. Solution-phase syntheses enable the precision control of size, shape, and composition of these colloidal NCs. Nanoparticle-in-matrix composites are a common motif among many nanoscience applications and are of particular interest to the thermal sciences community. To explore this morphological theme, we created crystalline inorganic composites with nanoparticle volume fractions ranging from 0 to approximately 100%. We synthesized these composites by mixing colloidal CdSe NCs and In2Se3 metal chalcogenide complex (MCC) precursor in the solution-phase, and then thermally transforming the MCC precursor into a crystalline In2Se3 matrix.


Descriptors :   PHONONS , thermal conductivity , nanocomposites , surface chemistry , Nanocrystals , LIGANDS , nanoparticles , COMPOSITE MATERIALS , SPECTROSCOPY


Distribution Statement : APPROVED FOR PUBLIC RELEASE