Metal nanoparticle fluids with magnetically induced electrical switching properties

Younghoon Kim; Jinhan Cho

doi:10.1039/c3nr00653k

Metal nanoparticle fluids with magnetically induced electrical switching properties

Younghoon Kim, Jinhan Cho

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

4 Scopus citations

Abstract

We report the successful preparation of solvent-free metal nanoparticle (NP) fluids with multiple-functionalities, such as rheological properties, magnetism, ionic conductivity, and electrical properties, allowing for facile synthesis and mass production. The gold nanoparticles (Au_NPs) used in this study were synthesized using tetraoctylammonium bromide (TOABr) in toluene and then directly phase-transferred to solvent-free low-molecular-weight (M_w) imidazolium-type ionic liquid media containing thiol groups (i.e., IL-SH). Magnetic metal fluids (i.e., MIL-SH-Au_NPs) were prepared by the addition of FeCl₃ powder to metal fluids (i.e., IL-SH-Au_NPs). These fluids showed relatively high ionic and electrical conductivities compared with those of conventional metal NP fluids based on organic ILs with high M_w. Furthermore, it was demonstrated that these fluids could be used as electric switches operated using an external magnetic field in organic media.

Original language	English
Pages (from-to)	4917-4922
Number of pages	6
Journal	Nanoscale
Volume	5
Issue number	11
DOIs	https://doi.org/10.1039/c3nr00653k
State	Published - Jun 7 2013
Externally published	Yes

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abstract = "We report the successful preparation of solvent-free metal nanoparticle (NP) fluids with multiple-functionalities, such as rheological properties, magnetism, ionic conductivity, and electrical properties, allowing for facile synthesis and mass production. The gold nanoparticles (AuNPs) used in this study were synthesized using tetraoctylammonium bromide (TOABr) in toluene and then directly phase-transferred to solvent-free low-molecular-weight (Mw) imidazolium-type ionic liquid media containing thiol groups (i.e., IL-SH). Magnetic metal fluids (i.e., MIL-SH-AuNPs) were prepared by the addition of FeCl3 powder to metal fluids (i.e., IL-SH-AuNPs). These fluids showed relatively high ionic and electrical conductivities compared with those of conventional metal NP fluids based on organic ILs with high Mw. Furthermore, it was demonstrated that these fluids could be used as electric switches operated using an external magnetic field in organic media.",

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AU - Kim, Younghoon

AU - Cho, Jinhan

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AB - We report the successful preparation of solvent-free metal nanoparticle (NP) fluids with multiple-functionalities, such as rheological properties, magnetism, ionic conductivity, and electrical properties, allowing for facile synthesis and mass production. The gold nanoparticles (AuNPs) used in this study were synthesized using tetraoctylammonium bromide (TOABr) in toluene and then directly phase-transferred to solvent-free low-molecular-weight (Mw) imidazolium-type ionic liquid media containing thiol groups (i.e., IL-SH). Magnetic metal fluids (i.e., MIL-SH-AuNPs) were prepared by the addition of FeCl3 powder to metal fluids (i.e., IL-SH-AuNPs). These fluids showed relatively high ionic and electrical conductivities compared with those of conventional metal NP fluids based on organic ILs with high Mw. Furthermore, it was demonstrated that these fluids could be used as electric switches operated using an external magnetic field in organic media.

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Metal nanoparticle fluids with magnetically induced electrical switching properties

Abstract

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