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LMSSMat Mécanique des Sols, Structures et Matériaux - IM2NP

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Forces d’interaction de VdW entre deux CNTs<br />

Energie potentielle <strong>des</strong> interactions entre deux SWCNT (modèle LJ)<br />

%° 1 ⎡⎛ 3.41 ⎞ ⎛ 3.41 ⎞<br />

φ( R) =− ⎢⎜ 0.4<br />

0.6 3.15R° ⎟ − ⎜<br />

0.28 3.15R°<br />

⎟<br />

⎢⎣⎝ + ⎠ ⎝ + 0.28 ⎠<br />

Reduced potential energy<br />

and reduced distance<br />

%° φ( R)<br />

φ( R)<br />

=<br />

| φ( R ) |<br />

Girifalco LA, <strong>et</strong> al. Phys Rev B. 2000;62(19):13104<br />

Sun C-H, <strong>et</strong> al. Chem Phys L<strong>et</strong>t. 2005;403(4-6):343-6<br />

Sun C-H, <strong>et</strong> al. Phys Rev B. 2006;73(19):195414-5<br />

0<br />

° ( R − ρ)<br />

R =<br />

( R - ρ)<br />

Forces de VdW entre deux MWCNTs<br />

0<br />

4 10<br />

van der Waals force (N/m)<br />

2<br />

0<br />

-2<br />

-4<br />

⎤<br />

⎥<br />

⎥⎦<br />

Énergie potentielle d‘interactions par unite de longueur<br />

equilibrium vdW gap<br />

( )<br />

vdW force b<strong>et</strong>ween CNTs (25, 8)<br />

vdW force b<strong>et</strong>ween CNTs (40, 32)<br />

-6<br />

2 4 6 8 10 12<br />

Gap b<strong>et</strong>ween two CNTs (Å)<br />

11 5<br />

⎛<br />

−12 ⎛ 3.41 ⎞ ⎛ 3.41 ⎞ ⎞<br />

f R = 1.602× 10 × 705.22× −<br />

⎜⎜ ⎟ ⎜ ⎟<br />

⎝R− 50+ 0.28⎠ ⎝R− 50+<br />

0.28⎠<br />

⎟<br />

⎝<br />

⎠<br />

( )<br />

11 5<br />

⎛<br />

−12 ⎛ 3.41 ⎞ ⎛ 3.41 ⎞ ⎞<br />

f R = 1.602× 10 × 1229.17 × −<br />

⎜⎜ ⎟ ⎜ ⎟<br />

⎝R− 297+ 0.28 ⎠ ⎝R− 297+<br />

0.28⎠<br />

⎟<br />

⎝<br />

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