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  4. An electro-elastic theory for the mechanically-assisted photo-induced spin transition in core-shell spin-crossover nanoparticles
 
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An electro-elastic theory for the mechanically-assisted photo-induced spin transition in core-shell spin-crossover nanoparticles

Journal
Physical Chemistry Chemical Physics
Date Issued
2018
Author(s)
Slimani, Ahmed 
Physics, Mathematics, Computer science 
Boukheddaden, Kamel
DOI
10.1039/c8cp05578e
URI
http://hdl.handle.net/20.500.12458/276
Abstract
The development of heterostructure materials may lead to new features that cannot be obtained with natural materials. Here we simulate a model structurally hybrid core-shell nanoparticle with different lattice parameters between an electronically inert shell and an active spin crossover core. The nanoparticle consists of a 2D core with 20 × 20 size with square symmetry, surrounded by a shell made of 10 atomic layers. The low temperature photoexcitation of the core shows a significant environment-dependent behavior. In particular, we demonstrate that a shell with a large lattice parameter accelerates the low-spin to high-spin photoexcitation process of the core through the single domain nucleation mechanism while a moderate shell lattice parameter leads to spatially-homogeneous growth of the high-spin fraction. We found that the mechanical retro-action of the shell may cause elastic instability of the core leading to efficient control and manipulation of its photo-conversion.
File(s)
 Slimani - 2018 - An electro-elastic theory for the mechanically-assisted photo-induced spin transition in core–shell spin-crossover nano-annotated.pdf (2.98 MB)
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9
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Oct 25, 2022
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Jan 30, 2023
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