Magnetic properties of Co nanoparticles in an AlMCM41 mesoporous host

Jin Seung Jung; Jun Yong Kim; Weon Sik Chae; Yong Rok Kim; Jong Ho Jun; Leszek Malkinski; Weilie Zhou; Amar Kumbhar; Marilena L. Viciu; John B. Wiley; Charles J. O'Connor

doi:10.1557/proc-676-y3.45

Magnetic properties of Co nanoparticles in an AlMCM41 mesoporous host

Jin Seung Jung, Jun Yong Kim, Weon Sik Chae, Yong Rok Kim, Jong Ho Jun, Leszek Malkinski, Weilie Zhou, Amar Kumbhar, Marilena L. Viciu, John B. Wiley, Charles J. O'Connor

Department of Chemistry

Research output: Contribution to journal › Conference article › peer-review

2 Citations (Scopus)

Abstract

Ultrafine cobalt particles in AlMCM41 silica tubes have been synthesized by ion exchange and the reduction with sodium borohydride. The role of this stable host matrix of AlMCM41 silica is to prevent agglomeration of the magnetic particles attached to the walls of AlMCM41 silica pores. The size of the host pores naturally limits the particle dimensions and thus improves their size distribution. Both magnetic susceptibility measurements and transmission electron microscopy (TEM) show a narrow distribution size of the nanoparticles. Well controlled insertion of the magnetic material to the host channel excludes formation of bulk particles outside the host material grains, which was confirmed by the TEM studies. X-ray diffraction data did not show peaks corresponding to a crystalline cobalt, but this maybe due to small size of particles and their relatively small volume fraction. The content of Co in the AlMCM41 host was measured using both magnetic measurements and elemental analysis.

Original language	English
Pages (from-to)	Y3.45.1-Y3.45.5
Journal	Materials Research Society Symposium - Proceedings
Volume	676
DOIs	https://doi.org/10.1557/proc-676-y3.45
Publication status	Published - 2001
Event	Synthesis, Functional Properties and Applications of Nanostructures - San Francisco, CA, United States Duration: 2001 Apr 17 → 2001 Apr 20

Bibliographical note

Funding Information:
This work was supported by grant No. 1999-2-121-004-5 from the interdisciplinary Research program of the KOSEF and also Konkuk Univ. ( J-H. J ), South Korea, and by the U.S Department of Defence ( DARPA MDA 972-97-1-0003 ).

All Science Journal Classification (ASJC) codes

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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title = "Magnetic properties of Co nanoparticles in an AlMCM41 mesoporous host",

abstract = "Ultrafine cobalt particles in AlMCM41 silica tubes have been synthesized by ion exchange and the reduction with sodium borohydride. The role of this stable host matrix of AlMCM41 silica is to prevent agglomeration of the magnetic particles attached to the walls of AlMCM41 silica pores. The size of the host pores naturally limits the particle dimensions and thus improves their size distribution. Both magnetic susceptibility measurements and transmission electron microscopy (TEM) show a narrow distribution size of the nanoparticles. Well controlled insertion of the magnetic material to the host channel excludes formation of bulk particles outside the host material grains, which was confirmed by the TEM studies. X-ray diffraction data did not show peaks corresponding to a crystalline cobalt, but this maybe due to small size of particles and their relatively small volume fraction. The content of Co in the AlMCM41 host was measured using both magnetic measurements and elemental analysis.",

author = "Jung, {Jin Seung} and Kim, {Jun Yong} and Chae, {Weon Sik} and Kim, {Yong Rok} and Jun, {Jong Ho} and Leszek Malkinski and Weilie Zhou and Amar Kumbhar and Viciu, {Marilena L.} and Wiley, {John B.} and O'Connor, {Charles J.}",

note = "Funding Information: This work was supported by grant No. 1999-2-121-004-5 from the interdisciplinary Research program of the KOSEF and also Konkuk Univ. ( J-H. J ), South Korea, and by the U.S Department of Defence ( DARPA MDA 972-97-1-0003 ).; Synthesis, Functional Properties and Applications of Nanostructures ; Conference date: 17-04-2001 Through 20-04-2001",

year = "2001",

doi = "10.1557/proc-676-y3.45",

language = "English",

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T1 - Magnetic properties of Co nanoparticles in an AlMCM41 mesoporous host

AU - Jung, Jin Seung

AU - Kim, Jun Yong

AU - Chae, Weon Sik

AU - Kim, Yong Rok

AU - Jun, Jong Ho

AU - Malkinski, Leszek

AU - Zhou, Weilie

AU - Kumbhar, Amar

AU - Viciu, Marilena L.

AU - Wiley, John B.

AU - O'Connor, Charles J.

N1 - Funding Information: This work was supported by grant No. 1999-2-121-004-5 from the interdisciplinary Research program of the KOSEF and also Konkuk Univ. ( J-H. J ), South Korea, and by the U.S Department of Defence ( DARPA MDA 972-97-1-0003 ).

PY - 2001

Y1 - 2001

N2 - Ultrafine cobalt particles in AlMCM41 silica tubes have been synthesized by ion exchange and the reduction with sodium borohydride. The role of this stable host matrix of AlMCM41 silica is to prevent agglomeration of the magnetic particles attached to the walls of AlMCM41 silica pores. The size of the host pores naturally limits the particle dimensions and thus improves their size distribution. Both magnetic susceptibility measurements and transmission electron microscopy (TEM) show a narrow distribution size of the nanoparticles. Well controlled insertion of the magnetic material to the host channel excludes formation of bulk particles outside the host material grains, which was confirmed by the TEM studies. X-ray diffraction data did not show peaks corresponding to a crystalline cobalt, but this maybe due to small size of particles and their relatively small volume fraction. The content of Co in the AlMCM41 host was measured using both magnetic measurements and elemental analysis.

AB - Ultrafine cobalt particles in AlMCM41 silica tubes have been synthesized by ion exchange and the reduction with sodium borohydride. The role of this stable host matrix of AlMCM41 silica is to prevent agglomeration of the magnetic particles attached to the walls of AlMCM41 silica pores. The size of the host pores naturally limits the particle dimensions and thus improves their size distribution. Both magnetic susceptibility measurements and transmission electron microscopy (TEM) show a narrow distribution size of the nanoparticles. Well controlled insertion of the magnetic material to the host channel excludes formation of bulk particles outside the host material grains, which was confirmed by the TEM studies. X-ray diffraction data did not show peaks corresponding to a crystalline cobalt, but this maybe due to small size of particles and their relatively small volume fraction. The content of Co in the AlMCM41 host was measured using both magnetic measurements and elemental analysis.

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JO - Materials Research Society Symposium - Proceedings

JF - Materials Research Society Symposium - Proceedings

T2 - Synthesis, Functional Properties and Applications of Nanostructures

Y2 - 17 April 2001 through 20 April 2001

ER -

Magnetic properties of Co nanoparticles in an AlMCM41 mesoporous host

Abstract

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