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Structure-property correlation in iron oxide nanoparticle-clay hybrid materials

Son, YH and Lee, JK and Soong, Y and Martello, D and Chyu, M (2010) Structure-property correlation in iron oxide nanoparticle-clay hybrid materials. Chemistry of Materials, 22 (7). 2226 - 2232. ISSN 0897-4756

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Heterostructures between montmorillonite and embedded -Fe2O 3 nanoparticles are explored to create new hybrid particles with high magnetic response and magnetic-field induced tunability. Fe2O 3 nanoparticles are hybridized to montmorillonite clays by using an intercalation technique. Also, stable aqueous fluids consisting of the heterostructured particles are prepared and the rheology of the fluids under external magnetic field is examined. When Fe2O3 nanoparticles are embedded in the interlayer space of montmorillonite clays, the magnetization per Fe atom increases at most 60 times. This unique combination of the magnetization and the coercivity is traced to the suppressed growth of embedded Fe2O3 nanoparticles by the aluminosilicate layers, leading to the size control, anisotropic magnetic interaction, and uniaxial stress of two-dimensionally distributed Fe2O3 nanoparticles. Furthermore, high magnetization of heterostructured particles leads to strong dependence of fluids viscosity on the external magnetic field. The present study indicates that the new heterostructured particles have unique magnetic field-dependent properties that are not attainable in individual clay or iron oxide particles. © 2010 American Chemical Society.


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Item Type: Article
Status: Published
CreatorsEmailPitt UsernameORCID
Son, YH
Lee, JKjul37@pitt.eduJUL370000-0002-7778-7679
Soong, Y
Martello, D
Chyu, Mmkchyu@pitt.eduMKCHYU0000-0002-6746-1499
Centers: Other Centers, Institutes, Offices, or Units > Petersen Institute of NanoScience and Engineering
Date: 13 April 2010
Date Type: Publication
Journal or Publication Title: Chemistry of Materials
Volume: 22
Number: 7
Page Range: 2226 - 2232
DOI or Unique Handle: 10.1021/cm9024843
Schools and Programs: Swanson School of Engineering > Mechanical Engineering and Materials Science
Refereed: Yes
ISSN: 0897-4756
Date Deposited: 16 Oct 2014 14:16
Last Modified: 22 Jun 2021 13:56


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