|Type of Publication:||Article|
|Journal:||Journal of Physical Chemistry C||Volume:||115|
|Month:||APR 21 2011|
PT: J; TC: 0; UT: WOS:000289403200003
Amphiphilic polymers are often used to disperse nanoparticles in aqueous solution. Polymer adsorption theory predicts that there exists a narrow compositional range of hydrophobic groups on the polymer chain that allows for kinetic stabilization. Too few groups limit polymer adsorption while too many allow aggregation of polymer-coated nanoparticles for lack of entropic repulsion. we experimentally validate and mathematically describe the existence of this compositional range, and the resulting stability window for the first time using a phenoxy-dextran polymer to disperse single-walled carbon nanotubes. The results should provide a theoretical basis for the design of nanoparticle dispersants.
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