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1. Self-Assembly of Asymmetrically Functionalized Titania Nanoparticles into Nanoshells

Author

Fredric G. Svensson, Gulaim A. Seisenbaeva, Nicholas A. Kotov, and Vadim G. Kessler

Subjects
self-assembly, nanoshells (hollow spheres), janus particles, pickering emulsion, Technology, Electrical engineering. Electronics. Nuclear engineering, TK1-9971, Engineering (General). Civil engineering (General), TA1-2040, Microscopy, QH201-278.5, Descriptive and experimental mechanics, QC120-168.85
Abstract

Titania (anatase) nanoparticles were anisotropically functionalized in water-toluene Pickering emulsions to self-assemble into nanoshells with diameters from 500 nm to 3 μm as candidates for encapsulation of drugs and other compounds. The water-phase contained a hydrophilic ligand, glucose-6-phosphate, while the toluene-phase contained a hydrophobic ligand, n-dodecylphosphonic acid. The addition of a dilute sodium alginate suspension that provided electrostatic charge was essential for the self-limited assembly of the nanoshells. The self-assembled spheres were characterized by scanning electron microscopy, elemental mapping, and atomic force microscopy. Drug release studies using tetracycline suggest a rapid release dominated by surface desorption.

Published
2020
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2. Self-Assembly of Asymmetrically Functionalized Titania Nanoparticles into Nanoshells

Author

Nicholas A. Kotov, Fredric G. Svensson, Gulaim A. Seisenbaeva, and Vadim G. Kessler

Subjects
Anatase, Materials science, Scanning electron microscope, Nanoparticle, Janus particles, 02 engineering and technology, nanoshells (hollow spheres), 010402 general chemistry, 01 natural sciences, lcsh:Technology, pickering emulsion, Desorption, General Materials Science, lcsh:Microscopy, lcsh:QC120-168.85, lcsh:QH201-278.5, lcsh:T, Communication, self-assembly, 021001 nanoscience & nanotechnology, Pickering emulsion, Nanoshell, 0104 chemical sciences, Chemical engineering, lcsh:TA1-2040, janus particles, lcsh:Descriptive and experimental mechanics, Self-assembly, lcsh:Electrical engineering. Electronics. Nuclear engineering, 0210 nano-technology, lcsh:Engineering (General). Civil engineering (General), lcsh:TK1-9971
Abstract

Titania (anatase) nanoparticles were anisotropically functionalized in water-toluene Pickering emulsions to self-assemble into nanoshells with diameters from 500 nm to 3 μm as candidates for encapsulation of drugs and other compounds. The water-phase contained a hydrophilic ligand, glucose-6-phosphate, while the toluene-phase contained a hydrophobic ligand, n-dodecylphosphonic acid. The addition of a dilute sodium alginate suspension that provided electrostatic charge was essential for the self-limited assembly of the nanoshells. The self-assembled spheres were characterized by scanning electron microscopy, elemental mapping, and atomic force microscopy. Drug release studies using tetracycline suggest a rapid release dominated by surface desorption.

Published
2020

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