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One-Step Formation of Morphologically Controlled Nanoparticles with Projection Coronas

Identifieur interne : 001802 ( Main/Exploration ); précédent : 001801; suivant : 001803

One-Step Formation of Morphologically Controlled Nanoparticles with Projection Coronas

Auteurs : Tatsuo Kaneko [Japon] ; Kazuhiro Hamada [Japon] ; Ming Qing Chen [Japon] ; Mitsuru Akashi [Japon]

Source :

RBID : ISTEX:C26B896B26BA366DA46A40CF802D1C15D05110BD

Abstract

Nanoparticles with projection coronas were prepared by the one-step dispersion terpolymerization of styrene, acrylonitrile, and poly(ethylene glycol) monomethacrylate in ethanol−water solution, and their morphologies were controlled. When the mole composition of acrylonitrile to the total monomers CAN was 0.49−0.66, electron microscopy showed that the nanoparticles were spherical and had a number of projections on the surface. A CAN of more than 0.66 yielded no nanospheres, and a CAN smaller than 0.49 yielded projection-free nanospheres. The morphology of the nanospheres could be controlled by changing the reaction conditions, and some conditions yielded a regular arrangement of uniform projections on the surface similar to that seen in some coronaviruses. X-ray and spectroscopic studies suggested that the projections might be formed as a result of the nonequilibrated swelling of acrylonitrile and poly(ethylene glycol) domains on the surface.

Url:
DOI: 10.1021/ma035276g


Affiliations:


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<div type="abstract">Nanoparticles with projection coronas were prepared by the one-step dispersion terpolymerization of styrene, acrylonitrile, and poly(ethylene glycol) monomethacrylate in ethanol−water solution, and their morphologies were controlled. When the mole composition of acrylonitrile to the total monomers CAN was 0.49−0.66, electron microscopy showed that the nanoparticles were spherical and had a number of projections on the surface. A CAN of more than 0.66 yielded no nanospheres, and a CAN smaller than 0.49 yielded projection-free nanospheres. The morphology of the nanospheres could be controlled by changing the reaction conditions, and some conditions yielded a regular arrangement of uniform projections on the surface similar to that seen in some coronaviruses. X-ray and spectroscopic studies suggested that the projections might be formed as a result of the nonequilibrated swelling of acrylonitrile and poly(ethylene glycol) domains on the surface.</div>
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