Synthesis of L10 ferromagnetic CoPt nanopowders using a single-source molecular precursor and water-soluble support

Matthew S. Wellons; Zheng Gai; Jian Shen; James Bentley; James E. Wittig; Charles M. Lukehart

doi:10.1039/c3tc31232a

Synthesis of L1₀ ferromagnetic CoPt nanopowders using a single-source molecular precursor and water-soluble support

Matthew S. Wellons, Zheng Gai, Jian Shen, James Bentley, James E. Wittig, Charles M. Lukehart

Scanning Tunneling Microscopy Group

Research output: Contribution to journal › Article › peer-review

14 Scopus citations

Abstract

Reductive decomposition of CoPt(CO)₄(dppe)Me/NaCl composite powder (2:98 CoPt precursor:NaCl mass ratio) at 650 °C under getter gas (9:1 N₂/H₂) gives black CoPt/NaCl nanocomposites with minimal CoPt nanoparticle coalescence. Aqueous dissolution of the NaCl support permits isolation of ferromagnetic L1₀ CoPt nanoparticles of ca. 11 nm average diameter as free-flowing black powders. As-prepared CoPt nanopowders exhibit moderate coercivity (4.0 kOe) at 300 K and high coercivity (26.0 kOe) at 5 K consistent with formation of polydisperse L1₀ CoPt nanoparticles having high purity and high crystallinity. Co₁Pt₁ nanoparticles are formed with good control of alloy stoichiometry using a single-source precursor by a convenient, scalable single-step process.

Original language	English
Pages (from-to)	5976-5980
Number of pages	5
Journal	Journal of Materials Chemistry C
Volume	1
Issue number	37
DOIs	https://doi.org/10.1039/c3tc31232a
State	Published - Oct 7 2013

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title = "Synthesis of L10 ferromagnetic CoPt nanopowders using a single-source molecular precursor and water-soluble support",

abstract = "Reductive decomposition of CoPt(CO)4(dppe)Me/NaCl composite powder (2:98 CoPt precursor:NaCl mass ratio) at 650 °C under getter gas (9:1 N2/H2) gives black CoPt/NaCl nanocomposites with minimal CoPt nanoparticle coalescence. Aqueous dissolution of the NaCl support permits isolation of ferromagnetic L10 CoPt nanoparticles of ca. 11 nm average diameter as free-flowing black powders. As-prepared CoPt nanopowders exhibit moderate coercivity (4.0 kOe) at 300 K and high coercivity (26.0 kOe) at 5 K consistent with formation of polydisperse L10 CoPt nanoparticles having high purity and high crystallinity. Co1Pt1 nanoparticles are formed with good control of alloy stoichiometry using a single-source precursor by a convenient, scalable single-step process.",

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T1 - Synthesis of L10 ferromagnetic CoPt nanopowders using a single-source molecular precursor and water-soluble support

AU - Wellons, Matthew S.

AU - Gai, Zheng

AU - Shen, Jian

AU - Bentley, James

AU - Wittig, James E.

AU - Lukehart, Charles M.

PY - 2013/10/7

Y1 - 2013/10/7

N2 - Reductive decomposition of CoPt(CO)4(dppe)Me/NaCl composite powder (2:98 CoPt precursor:NaCl mass ratio) at 650 °C under getter gas (9:1 N2/H2) gives black CoPt/NaCl nanocomposites with minimal CoPt nanoparticle coalescence. Aqueous dissolution of the NaCl support permits isolation of ferromagnetic L10 CoPt nanoparticles of ca. 11 nm average diameter as free-flowing black powders. As-prepared CoPt nanopowders exhibit moderate coercivity (4.0 kOe) at 300 K and high coercivity (26.0 kOe) at 5 K consistent with formation of polydisperse L10 CoPt nanoparticles having high purity and high crystallinity. Co1Pt1 nanoparticles are formed with good control of alloy stoichiometry using a single-source precursor by a convenient, scalable single-step process.

AB - Reductive decomposition of CoPt(CO)4(dppe)Me/NaCl composite powder (2:98 CoPt precursor:NaCl mass ratio) at 650 °C under getter gas (9:1 N2/H2) gives black CoPt/NaCl nanocomposites with minimal CoPt nanoparticle coalescence. Aqueous dissolution of the NaCl support permits isolation of ferromagnetic L10 CoPt nanoparticles of ca. 11 nm average diameter as free-flowing black powders. As-prepared CoPt nanopowders exhibit moderate coercivity (4.0 kOe) at 300 K and high coercivity (26.0 kOe) at 5 K consistent with formation of polydisperse L10 CoPt nanoparticles having high purity and high crystallinity. Co1Pt1 nanoparticles are formed with good control of alloy stoichiometry using a single-source precursor by a convenient, scalable single-step process.

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JO - Journal of Materials Chemistry C

JF - Journal of Materials Chemistry C

IS - 37

ER -

Synthesis of L1₀ ferromagnetic CoPt nanopowders using a single-source molecular precursor and water-soluble support

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