Synthesis and characterization of thermo-sensitive magnetic maghemite nanoparticles

Ariel L. Cappelletti; Julieta I. Paez; Miriam C. Strumia

doi:10.3998/ark.5550190.0012.735

Synthesis and characterization of thermo-sensitive magnetic maghemite nanoparticles

Ariel L. Cappelletti, Julieta I. Paez, Miriam C. Strumia^*

^*Corresponding author for this work

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

6 Citations (Scopus)

8 Downloads (Pure)

Abstract

The modification of magnetic nanoparticles (MNPs) with a thermo-sensitive organic shell of poly(N-isopropylacrylamide) (PNIPAm) is reported. The surface of maghemite MNPs was modified in two steps: firstly, using a silane coupling agent and leaving vinyl pending groups on the MNPs surface; and secondly, grafting PNIPAm chains from the modified MNPs via a free radical polymerization. The results indicate that the method developed here for the modification of MNPs is an effective way of synthesizing thermo-responsive MNPs. They present a magnetic behavior due to the maghemite core and a thermal response based on a deswelling/swelling of their polymeric shell (PNIPAm).

Original language	English
Pages (from-to)	426-438
Number of pages	13
Journal	Arkivoc
Volume	2011
Issue number	7
DOIs	https://doi.org/10.3998/ark.5550190.0012.735
Publication status	Published - 24 May 2011
Externally published	Yes

Keywords

Maghemite
Magnetic nanoparticles
Poly(Nisopropylacrylamide)
Thermo-sensitive nanoparticles

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10.3998/ark.5550190.0012.735

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title = "Synthesis and characterization of thermo-sensitive magnetic maghemite nanoparticles",

abstract = "The modification of magnetic nanoparticles (MNPs) with a thermo-sensitive organic shell of poly(N-isopropylacrylamide) (PNIPAm) is reported. The surface of maghemite MNPs was modified in two steps: firstly, using a silane coupling agent and leaving vinyl pending groups on the MNPs surface; and secondly, grafting PNIPAm chains from the modified MNPs via a free radical polymerization. The results indicate that the method developed here for the modification of MNPs is an effective way of synthesizing thermo-responsive MNPs. They present a magnetic behavior due to the maghemite core and a thermal response based on a deswelling/swelling of their polymeric shell (PNIPAm).",

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AU - Cappelletti, Ariel L.

AU - Paez, Julieta I.

AU - Strumia, Miriam C.

PY - 2011/5/24

Y1 - 2011/5/24

N2 - The modification of magnetic nanoparticles (MNPs) with a thermo-sensitive organic shell of poly(N-isopropylacrylamide) (PNIPAm) is reported. The surface of maghemite MNPs was modified in two steps: firstly, using a silane coupling agent and leaving vinyl pending groups on the MNPs surface; and secondly, grafting PNIPAm chains from the modified MNPs via a free radical polymerization. The results indicate that the method developed here for the modification of MNPs is an effective way of synthesizing thermo-responsive MNPs. They present a magnetic behavior due to the maghemite core and a thermal response based on a deswelling/swelling of their polymeric shell (PNIPAm).

AB - The modification of magnetic nanoparticles (MNPs) with a thermo-sensitive organic shell of poly(N-isopropylacrylamide) (PNIPAm) is reported. The surface of maghemite MNPs was modified in two steps: firstly, using a silane coupling agent and leaving vinyl pending groups on the MNPs surface; and secondly, grafting PNIPAm chains from the modified MNPs via a free radical polymerization. The results indicate that the method developed here for the modification of MNPs is an effective way of synthesizing thermo-responsive MNPs. They present a magnetic behavior due to the maghemite core and a thermal response based on a deswelling/swelling of their polymeric shell (PNIPAm).

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KW - Magnetic nanoparticles

KW - Poly(Nisopropylacrylamide)

KW - Thermo-sensitive nanoparticles

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DO - 10.3998/ark.5550190.0012.735

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VL - 2011

SP - 426

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JO - Arkivoc

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Synthesis and characterization of thermo-sensitive magnetic maghemite nanoparticles

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