Soutenance de stage - IM2NP
Soutenance de stage - IM2NP
Soutenance de stage - IM2NP
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Propriétés structurales<br />
D/2 = 2 nm<br />
u r<br />
(r, 0):<br />
u z<br />
(0, z):<br />
Déformation<br />
rr ≃ 0.3%<br />
Déformation<br />
zz ≃ 3%<br />
=> effets anharmoniques<br />
• Relaxation <strong>de</strong> surface λ r<br />
~λ z<br />
~1nm<br />
• NP <strong>de</strong> D = H = 4 nm => 72 % du<br />
volume <strong>de</strong> la NP !<br />
• Deux régimes:<br />
H,D > 2λ r<br />
(2λ z<br />
) => élasticité<br />
H,D < 2λ r<br />
(2λ z<br />
) => atomistique