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This work reports the preparation of chitosan hollow nanospheres and their uses as the ultrasound-induced imaging agents. Reaction of chitosan to the 4-isocyanato-4′-(3,3-dimethyl-2,4-dioxo-azetidino)diphenylmethane modified silica nanoparticles forms silica@chitosan core shell nanoparticles. Removal of the silica cores with hydrofluoride generates the chitosan hollow nanospheres. Structures and morphology...
Poly(styrene sulfonic acid)-functionalized carbon nanotubes (CNT-PSSA), which was obtained with atom transfer radical polymerization (ATRP), was utilized in preparation of chitosan/CNT nanocomposites (CH/CNT-PSSA). Chemical linkages between chitosan and CNTs form in the nanocomposites through the reaction between the sulfuric acid groups of CNT-PSSA and the amino groups of chitosan, to warrant the...
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