Pores shrinkage and growth in polycrystalline hollow nanoparticles and nanotubes

Title: Pores shrinkage and growth in polycrystalline hollow nanoparticles and nanotubes
Creator: Klinger, Leonid; Murch, Graeme E.; Belova, Irina V.; Rabkin, Eugen
Relation: Scripta Materialia Vol. 180, Issue 15 April 2020, p. 93-96
Publisher Link: http://dx.doi.org/10.1016/j.scriptamat.2020.01.029
Publisher: Elsevier
Resource Type: journal article
Date: 2020
Description: We propose a model of internal pore shrinkage in hollow polycrystalline nanoparticles controlled by surface and grain boundary diffusion. The latter significantly accelerates the pore shrinkage as compared to single crystalline nanoparticles. Moreover, further shrinkage acceleration is achieved by allowing material accretion/depletion at the grain boundaries and concomitant drift of the grain's lattice toward the center of the particle. Our model predicts that above a certain critical number of grain boundaries in the particle the central pore becomes thermodynamically stable and cannot be removed by annealing.
Subject: nanostructure; grain boundary diffusion; hollow nanoparticles; shrinkage
Identifier: http://hdl.handle.net/1959.13/1463584
Identifier: uon:46777
Identifier: ISSN:1359-6462
Language: eng
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