CHEM 4214 Lecture Notes - Lecture 23: Nanoparticle, Rayleigh Scattering, Exponential Decay
Document Summary
Is is what you measure k = optical constant (what you knowmaterial property) use these eqns to calculate m. R is half of diameter of hard sphere: gaussian coil can do this for rod, disk, etc. Chem4212 polymers page 2 can do this for rod, disk, etc. P(0) = 1 can ignore x2 term b/c really small looks like exponential decay regardless of which case we look at. Guinier"s law this is regardless of shape of particle: when q = 0 ( ) then lambda --> infinity. -> goes back to raleigh scattering case where: when is what we measure as a function of q (same as theta, scatterring angle) and c. Zimm eqn k is what you know put it back into eqn when x << 1 we measure 3 things. How do we analyze ls data use zimm plot c = 0. 1 g/ml c = 0. 2 g/ml.
