Journal
ACS NANO
Volume 9, Issue 3, Pages 3119-3124Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nn507489p
Keywords
gibbous colloidal nanoparticles; raspberry particle morphology control; stimuli-responsive nanoparticles; inorganic-organic composite colloids
Categories
Funding
- National Science Foundation [CMMI 1332964]
- J.E. Sirrine Foundation Endowment at Clemson University
- Directorate For Engineering
- Div Of Civil, Mechanical, & Manufact Inn [1332964] Funding Source: National Science Foundation
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Multiphase colloidal copolymer nanoparticles, if properly designed, offer a number of unique properties and well-documented technological opportunities for drug delivery, nanolithography, high surface area colloidal Crystals, or hollow nanoparticles, to name just a few. Using a simple free radical polymerization process, we synthesized copolymer nanoparticles with controlled stimuli-responsive phase-separated gibbosities. The topography of the gibbous phase can be controlled by the copolymer composition and polymerization conditions. When pH-sensitive monomers were copolymerized onto surface bulges, pH changes resulted in localized gibbous phase dimensional changes. Facilitated by monomer diffusion into interfacial particle seed solution regions, localized polymerization near the surface is responsible for the formation of phase-separated gibbous topographies. This general approach may offer a number of possibilities for controllable design of ordered heterogeneous copolymer morphologies for a variety of applications.
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