Preparation of Polymer Spheres and Colloidal Crystal Templates

1 Preparation of Polymer Spheres and Colloidal Crystal Templates 

Monodispersed PMMA spheres (diameter 291 8 nm) were synthesized by literature techniques [63,75,76]. 1.60 g of potassium persulfate as a polymerization initiator and 720 ml of water were stirred at 300 rpm, heated at 353 K, and 

Entry Sample Initiator PMMA diameter (nm) Pore slze (nm) Window slze (nm ) BET surface area (m /g) Crystallite size (nm) Impurity (wt%) 

La(N03)3 + Fe(N03)s if ethylene glycol-MeOH (MeOH 40 vol%, total metal cone. 2 M) 

Size of polymer spheres and formation of colloidal crystals (fee packing) of polymer spheres were confirmed by SEM. 

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