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Particle Surface Design using an All-Dry Encapsulation Method


  • The authors thank the DuPont MIT Alliance for financial support. This work in part made use of MRSEC Shared Facilities at MIT supported by the National Science Foundation under Award DMR-9400334 and the W. M. Keck Biological Imaging Facility at the Whitehead Institute.


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Initiated chemical vapor deposition enables an all-dry encapsulation of fine particles down to the nanoscale by functional polymers. Initiator vapor is first thermally activated to form primary radicals, which, together with the monomer vapor, are adsorbed onto the particle surface where free-radical polymerization creates a stoichiometric polymer coating (see figure). This polymer coating can subsequently be immobilized with other desired functional molecules.

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