2026-09-19T01:18:12Zhttps://dspace.mit.edu/server/oai/requestoai:dspace.mit.edu:1721.1/175842022-01-13T07:54:19Zcom_1721.1_7582com_1721.1_7581col_1721.1_131022
Robert E. Cohen.
Abes, Jeff I., 1975-
Massachusetts Institute of Technology. Dept. of Chemical Engineering.
Massachusetts Institute of Technology. Department of Chemical Engineering
2005-06-02T16:16:47Z
2005-06-02T16:16:47Z
2003
2003
http://hdl.handle.net/1721.1/17584
53088805
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 2003.
Includes bibliographical references.
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.
by Jeff I. Abes.
Ph.D.
99 leaves
7575982 bytes
7575789 bytes
application/pdf
application/pdf
eng
Massachusetts Institute of Technology
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http://dspace.mit.edu/handle/1721.1/7582
Chemical Engineering.
Selective growth of magnetic nanoparticles in domains of block copolymer films, and in polyelectrolyte multilayers
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<Abstract>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.</Abstract>
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