KevinYager at 13:38, 25 July 2015

2015-07-25T13:38:43Z

KevinYager: Created page with "Interparticle interactions can be probed by measuring SAXS as a function of concentration (''c''). At low concentration, the particles do not interact. The scattering in t..."

2015-07-25T13:37:00Z

Created page with "Interparticle interactions can be probed by measuring SAXS as a function of concentration (''c''). At low concentration, the particles do not interact. The scattering in t..."

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Interparticle interactions can be probed by measuring [[SAXS]] as a function of concentration (''c''). At low concentration, the particles do not interact. The scattering in this case is dominated by the [[form factor]] (<math>\scriptstyle P(q)</math>), which simply encodes the particle size/shape (because the structure factor is eliminated: <math>\scriptstyle S(c=0,q)=1</math>). On the other hand, at high concentrations, particles interact strongly, leading to a non-trivial structure factor.

:<math>I(c,q) = I(c=0,q) \times S(c,q)</math>
:<math>S(c,q) = \frac{ I(c,q) }{ I(0,q) }</math>

From the solution [[structure factor]] (<math>\scriptstyle S(q)</math>), one can calculate the second virial coefficient (''A''<sub>2</sub>):
:<math>\frac{1}{S(c,q=0)} = 1 + 2 M A_2 c</math>

==See Also==
* ''Journal of Crystal Growth'' '''2001''', 232, 1-9.
* ''Methods in Enzymology'' '''1997''', Vol. 276, 100-110.

← Older revision		Revision as of 13:38, 25 July 2015
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−	Interparticle interactions can be probed by measuring [[SAXS]] as a function of concentration (''c''). At low concentration, the particles do not interact. The scattering in this case is dominated by the [[form factor]] (<math>\scriptstyle P(q)</math>), which simply encodes the particle size/shape (because the structure factor is eliminated: <math>\scriptstyle S(c=0,q)=1</math>). On the other hand, at high concentrations, particles interact strongly, leading to a non-trivial structure factor.	+	Interparticle interactions can be probed by measuring [[SAXS]] as a function of concentration (''c''). At low concentration, the particles do not interact. The [[scattering]] in this case is dominated by the [[form factor]] (<math>\scriptstyle P(q)</math>), which simply encodes the particle size/shape (because the [[structure factor]] is eliminated: <math>\scriptstyle S(c=0,q)=1</math>). On the other hand, at high concentrations, particles interact strongly, leading to a non-trivial structure factor.

	:<math>I(c,q) = I(c=0,q) \times S(c,q)</math>		:<math>I(c,q) = I(c=0,q) \times S(c,q)</math>

Example:Virial coefficient - Revision history

KevinYager at 13:38, 25 July 2015

KevinYager: Created page with "Interparticle interactions can be probed by measuring SAXS as a function of concentration (''c''). At low concentration, the particles do not interact. The scattering in t..."