Smart Hybrid Materials (SHMs)
Khashab Research Group
Innovatively Functionalized Nanomaterials for Biomedical, Sensing and Composites Applications

Page 09/26/2015 12:31:23

Photoresponsive Bridged Silsesquioxane Nanoparticles with Tunable Morphology for Light-Triggered Plasmid DNA Delivery

Fatieiev, Y.; Croissant, J.; Alsaiari, S.; Moosa, B. A.; Anjum, D. H.; Khashab, N. M. Photoresponsive Bridged Silsesquioxane Nanoparticles with Tunable Morphology for Light-Triggered Plasmid DNA Delivery. ACS Appl. Mater. Interfaces 2015, 7, 24993-24997
Fatieiev, Y.; Croissant, J.; Alsaiari, S.; Moosa, B. A.; Anjum, D. H.; Khashab, N. M.
Bridged silsesquioxane, DNA delivery, organo- silica, hollow nanoparticles, charge reversal
2015
Bridged silsesquioxane nanocomposites with tunable morphologies incorporating o-nitrophenylene-ammonium bridges are described. The systematic screening of the sol-gel parameters allowed the material to reach the nanoscale –unlike most reported bridged silsesquioxane materials– with controlled dense and hollow structures of 100 to 200 nm. The hybrid composition of silsesquioxanes with 50% of organic content homogenously distributed in the nanomaterials endowed them with photoresponsive properties. Light irradiation was performed to reverse the surface charge of nanoparticles from +46 to -39 mV via the photoreaction of the organic fragments within the particles, as confirmed by spectroscopic monitorings. Furthermore, such NPs were ap-plied for the first time for the on-demand delivery of plasmid DNA in HeLa cancer cells via light actuation.
 
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