Synthesis of highly stable graphite-encapsulated metal (Fe, Co, and Ni) nanoparticles

Seung Jae Lee; Jongjin Jung; Mi Ae Kim; Yong Rok Kim; Joung Kyu Park

doi:10.1007/s10853-012-6706-6

Synthesis of highly stable graphite-encapsulated metal (Fe, Co, and Ni) nanoparticles

Seung Jae Lee, Jongjin Jung, Mi Ae Kim, Yong Rok Kim, Joung Kyu Park

Department of Chemistry

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

12 Citations (Scopus)

Abstract

Graphite-encapsulated metal magnetic nanoparticles have been attracted for biological applications because of their high magnetization of the encapsulated particles. However, most of the synthetic methods have limitations in terms of scalability and economics because of the demanding synthetic conditions and low yields. Here, we show that well-controlled graphite-encapsulated metal (Fe, Co, and Ni) nanoparticles can be synthesized by a hydrothermal method, simply by mixing metal source with sucrose as a carbon source. The saturation magnetization (Ms) values of Fe/C, Co/C, and Ni/C were 86.6, 43.8, and 113.1 emu/g, respectively. The Fe/C and Ni/C showed higher Ms values than bulk Fe ₃O ₄ (75.5 emu/g). The graphite-encapsulated metal nanoparticles showed good stability against acid and base environments.

Original language	English
Pages (from-to)	8112-8117
Number of pages	6
Journal	Journal of Materials Science
Volume	47
Issue number	23
DOIs	https://doi.org/10.1007/s10853-012-6706-6
Publication status	Published - 2012 Dec

Bibliographical note

Funding Information:
Acknowledgements This study was supported by KRICT general research fund (SI-1210) and the Korean Ministry of Science and Technology (KK-1207-B6). Y.-R. Kim thanks for the support from the Pioneer Research Center Program through the National Research Foundation of Korea funded by the Ministry of Education, Science and Technology (No. 2012-0001066).

All Science Journal Classification (ASJC) codes

Materials Science(all)
Mechanics of Materials
Mechanical Engineering

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title = "Synthesis of highly stable graphite-encapsulated metal (Fe, Co, and Ni) nanoparticles",

abstract = "Graphite-encapsulated metal magnetic nanoparticles have been attracted for biological applications because of their high magnetization of the encapsulated particles. However, most of the synthetic methods have limitations in terms of scalability and economics because of the demanding synthetic conditions and low yields. Here, we show that well-controlled graphite-encapsulated metal (Fe, Co, and Ni) nanoparticles can be synthesized by a hydrothermal method, simply by mixing metal source with sucrose as a carbon source. The saturation magnetization (Ms) values of Fe/C, Co/C, and Ni/C were 86.6, 43.8, and 113.1 emu/g, respectively. The Fe/C and Ni/C showed higher Ms values than bulk Fe 3O 4 (75.5 emu/g). The graphite-encapsulated metal nanoparticles showed good stability against acid and base environments.",

author = "Lee, {Seung Jae} and Jongjin Jung and Kim, {Mi Ae} and Kim, {Yong Rok} and Park, {Joung Kyu}",

note = "Funding Information: Acknowledgements This study was supported by KRICT general research fund (SI-1210) and the Korean Ministry of Science and Technology (KK-1207-B6). Y.-R. Kim thanks for the support from the Pioneer Research Center Program through the National Research Foundation of Korea funded by the Ministry of Education, Science and Technology (No. 2012-0001066).",

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AU - Kim, Yong Rok

AU - Park, Joung Kyu

N1 - Funding Information: Acknowledgements This study was supported by KRICT general research fund (SI-1210) and the Korean Ministry of Science and Technology (KK-1207-B6). Y.-R. Kim thanks for the support from the Pioneer Research Center Program through the National Research Foundation of Korea funded by the Ministry of Education, Science and Technology (No. 2012-0001066).

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