Well-Defined Oxide Core-Poly(vinyl pyrrolidone) Shell Nanoparticles: Interactions and Multi-Modal Glass Transition Dynamics at Interfaces

Interfacial interactions and dynamics were studied in silica and alumina core-poly(vinyl pyrrolidone) (PVP) shell nanoparticles with different shell thicknesses starting from 1-2 nm (monolayer); their geometry and structural organization were comprehensively characterized by several techniques. Far-...

Full description

Saved in:
Bibliographic Details
Published in:Macromolecular symposia. 2010-10, Vol.296 (1), p.541-549
Main Authors: Bershtein, Vladimir, Gun'ko, Vladimir, Egorova, Larisa, Guzenko, Natalia, Pakhlov, Eugene, Ryzhov, Valery, Zarko, Vladimir
Format: Article
Language:English
Subjects:
calorimetry
core-shell nanoparticles
glass transition
infrared spectroscopy
interfaces
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Interfacial interactions and dynamics were studied in silica and alumina core-poly(vinyl pyrrolidone) (PVP) shell nanoparticles with different shell thicknesses starting from 1-2 nm (monolayer); their geometry and structural organization were comprehensively characterized by several techniques. Far- and mid-IR spectroscopy, combined with DSC activation analysis of the glass transition, allowed to register hydrogen bonding and Lewis/Brønsted interactions, and the multi-modal glass transition dynamics in PVP nanoshells, as well as their interrelationship. For PVP monolayer, only a few “abnormal” modes constituted glass transition which covered the temperature range from 80 to 230 °C, with varying the activation energy by an order of magnitude.
ISSN:1022-1360
1521-3900
DOI:10.1002/masy.201051071