Selective growth of magnetic nanoparticles in domains of block copolymer films, and in polyelectrolyte multilayers
Author(s)
Abes, Jeff I., 1975-
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Massachusetts Institute of Technology. Dept. of Chemical Engineering.
Advisor
Robert E. Cohen.
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Nonagglomerated cobalt, iron, iron-cobalt, and cobalt-nickel alloy nanoparticles, some of which exhibit significant room-temperature magnetic coercivity, have been produced by thermal decomposition of organometallic complexes in a bulk film of P(S-b-2VP). The particles are patterned on the nanoscale: they reside within the P2VP domains of the block copolymer morphology. These results are made possible by the selective sequestration of organometallic complexes into these domains in amounts sufficient to nucleate and grow substantial quantities of nanoparticles, some of which are larger than the size required for ferromagnetic behavior. Nonagglomerated metallic nanoparticles have also been produced inside polyelectrolyte films by the growth of palladium nucleating sites followed by the use of an electroless plating bath. Control of particle size and spatial distribution has been demonstrated. The effect of electroless bath chemistry on particle composition has been examined.
Description
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 2003. Includes bibliographical references.
Date issued
2003Department
Massachusetts Institute of Technology. Department of Chemical EngineeringPublisher
Massachusetts Institute of Technology
Keywords
Chemical Engineering.