There are lots of nanoparticle preparation techniques (various emulsion
techniqes, sonication...) and the list grows longer every day. Google
will provide you with plenty of hits, Google Scholar will provide many
as well. Try this for starters:
(it's a free article).
Drug release is the result of diffusion through the matrix. Look up
Fick's Laws and anomalous diffusion.
Aspen Research -
"Turning Questions into Answers"
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