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. Author manuscript; available in PMC: 2014 Aug 14.
Published in final edited form as: Colloids Surf B Biointerfaces. 1995 Mar 8;4(2):65–75. doi: 10.1016/0927-7765(94)01150-4

Fig. 1.

Fig. 1

Schematics of the surface reactions used for the preparation of quaternary amine silica.