Magnetomicelles: Composite nanostructures from magnetic nanoparticles and cross-linked amphiphilic block copolymers

Byeong-Su Kim, Jiao Ming Qiu, Jian Ping Wang, T. Andrew Taton

Research output: Contribution to journalArticle

243 Citations (Scopus)

Abstract

We report the synthesis, characterization, and covalent surface chemistry of "magnetomicelles", cross-linked, amphiphilic block-copolymer micelles that encapsulate superparamagnetic iron oxide nanoparticles. Because these composite nanostructures assemble spontaneously from solution by simultaneous desolvation of nanoparticle and amphiphilic poly(styrene 250-block/acrylic acid 13) components, explicit surface functionalization of the particles is not required, and the encapsulation method was applied to different magnetic nanoparticle sizes and compositions. TEM images of the magnetomicelles illustrated that the number of encapsulated particles could be dictated rationally by synthetic conditions. The magnetic properties of the particles were characterized by SQUID magnetometry and followed the general Langevin magnetic model for superparamagnetic materials. The micellar shells of these particles were functionalized using covalent chemistry that would not ordinarily be possible on the magnetic particle surface. As a result, this noncovalent approach provides a new route to technological applications of hydrophobic magnetic nanomaterials that lack appropriate conjugate surface chemistry.

Original languageEnglish
Pages (from-to)1987-1991
Number of pages5
JournalNano Letters
Volume5
Issue number10
DOIs
Publication statusPublished - 2005 Oct 1

Fingerprint

block copolymers
Block copolymers
Nanostructures
Nanoparticles
Surface chemistry
nanoparticles
composite materials
Composite materials
chemistry
Styrene
SQUIDs
Micelles
Iron oxides
Encapsulation
Nanostructured materials
Acrylics
Magnetic properties
Transmission electron microscopy
acrylic acid
iron oxides

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering

Cite this

Kim, Byeong-Su ; Qiu, Jiao Ming ; Wang, Jian Ping ; Taton, T. Andrew. / Magnetomicelles : Composite nanostructures from magnetic nanoparticles and cross-linked amphiphilic block copolymers. In: Nano Letters. 2005 ; Vol. 5, No. 10. pp. 1987-1991.
@article{ff73af35e3bc4d9caea8a8456859d330,
title = "Magnetomicelles: Composite nanostructures from magnetic nanoparticles and cross-linked amphiphilic block copolymers",
abstract = "We report the synthesis, characterization, and covalent surface chemistry of {"}magnetomicelles{"}, cross-linked, amphiphilic block-copolymer micelles that encapsulate superparamagnetic iron oxide nanoparticles. Because these composite nanostructures assemble spontaneously from solution by simultaneous desolvation of nanoparticle and amphiphilic poly(styrene 250-block/acrylic acid 13) components, explicit surface functionalization of the particles is not required, and the encapsulation method was applied to different magnetic nanoparticle sizes and compositions. TEM images of the magnetomicelles illustrated that the number of encapsulated particles could be dictated rationally by synthetic conditions. The magnetic properties of the particles were characterized by SQUID magnetometry and followed the general Langevin magnetic model for superparamagnetic materials. The micellar shells of these particles were functionalized using covalent chemistry that would not ordinarily be possible on the magnetic particle surface. As a result, this noncovalent approach provides a new route to technological applications of hydrophobic magnetic nanomaterials that lack appropriate conjugate surface chemistry.",
author = "Byeong-Su Kim and Qiu, {Jiao Ming} and Wang, {Jian Ping} and Taton, {T. Andrew}",
year = "2005",
month = "10",
day = "1",
doi = "10.1021/nl0513939",
language = "English",
volume = "5",
pages = "1987--1991",
journal = "Nano Letters",
issn = "1530-6984",
publisher = "American Chemical Society",
number = "10",

}

Magnetomicelles : Composite nanostructures from magnetic nanoparticles and cross-linked amphiphilic block copolymers. / Kim, Byeong-Su; Qiu, Jiao Ming; Wang, Jian Ping; Taton, T. Andrew.

In: Nano Letters, Vol. 5, No. 10, 01.10.2005, p. 1987-1991.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Magnetomicelles

T2 - Composite nanostructures from magnetic nanoparticles and cross-linked amphiphilic block copolymers

AU - Kim, Byeong-Su

AU - Qiu, Jiao Ming

AU - Wang, Jian Ping

AU - Taton, T. Andrew

PY - 2005/10/1

Y1 - 2005/10/1

N2 - We report the synthesis, characterization, and covalent surface chemistry of "magnetomicelles", cross-linked, amphiphilic block-copolymer micelles that encapsulate superparamagnetic iron oxide nanoparticles. Because these composite nanostructures assemble spontaneously from solution by simultaneous desolvation of nanoparticle and amphiphilic poly(styrene 250-block/acrylic acid 13) components, explicit surface functionalization of the particles is not required, and the encapsulation method was applied to different magnetic nanoparticle sizes and compositions. TEM images of the magnetomicelles illustrated that the number of encapsulated particles could be dictated rationally by synthetic conditions. The magnetic properties of the particles were characterized by SQUID magnetometry and followed the general Langevin magnetic model for superparamagnetic materials. The micellar shells of these particles were functionalized using covalent chemistry that would not ordinarily be possible on the magnetic particle surface. As a result, this noncovalent approach provides a new route to technological applications of hydrophobic magnetic nanomaterials that lack appropriate conjugate surface chemistry.

AB - We report the synthesis, characterization, and covalent surface chemistry of "magnetomicelles", cross-linked, amphiphilic block-copolymer micelles that encapsulate superparamagnetic iron oxide nanoparticles. Because these composite nanostructures assemble spontaneously from solution by simultaneous desolvation of nanoparticle and amphiphilic poly(styrene 250-block/acrylic acid 13) components, explicit surface functionalization of the particles is not required, and the encapsulation method was applied to different magnetic nanoparticle sizes and compositions. TEM images of the magnetomicelles illustrated that the number of encapsulated particles could be dictated rationally by synthetic conditions. The magnetic properties of the particles were characterized by SQUID magnetometry and followed the general Langevin magnetic model for superparamagnetic materials. The micellar shells of these particles were functionalized using covalent chemistry that would not ordinarily be possible on the magnetic particle surface. As a result, this noncovalent approach provides a new route to technological applications of hydrophobic magnetic nanomaterials that lack appropriate conjugate surface chemistry.

UR - http://www.scopus.com/inward/record.url?scp=27544486715&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=27544486715&partnerID=8YFLogxK

U2 - 10.1021/nl0513939

DO - 10.1021/nl0513939

M3 - Article

C2 - 16218723

AN - SCOPUS:27544486715

VL - 5

SP - 1987

EP - 1991

JO - Nano Letters

JF - Nano Letters

SN - 1530-6984

IS - 10

ER -