Etude par Sonde Atomique Tomographique de la formation de nano ...

tel-00751814, version 1 - 14 Nov 2012
Chapter 2. Materials, experimental and simulation techniques
slightly elongated as it can be expected in high evaporation field particles. In particles with
core shell structure, atoms belonging to shell and core are completely mixed. No more core
shell structure can be detected after simulated evaporation. Particle without core shell
structure are also completely mixed with the matrix.
(a) Initial configuration
(b)
(c)
(d)
Nanoparticle with core
shell structure
Nanoparticle without
core-shell structure
Nanoparticle with core
shell structure
Nanoparticle without
core-shell structure
Nanoparticle with core
shell structure
Figure 2.18. Modelling of APT analyse on high-filed ( � A � 1.
4 ) nanoparticles with
Rcore (a) 0.5 nm, (b) 1.0 nm, (c) 1.5 nm and (d) 2.0 nm dispersed. Particles with and without
core shell structure is shown. Cores of both are composed of pure element A. Initial
configuration (left) and reconstruction after analyse (right).
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