WO2009002569A3 - Electromagnetic nanocomposites and methods of manufacture - Google Patents

Electromagnetic nanocomposites and methods of manufacture Download PDF

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Publication number
WO2009002569A3
WO2009002569A3 PCT/US2008/051725 US2008051725W WO2009002569A3 WO 2009002569 A3 WO2009002569 A3 WO 2009002569A3 US 2008051725 W US2008051725 W US 2008051725W WO 2009002569 A3 WO2009002569 A3 WO 2009002569A3
Authority
WO
WIPO (PCT)
Prior art keywords
nanocomposites
matrix
giant magnetoresistance
polymerization
polymer matrix
Prior art date
Application number
PCT/US2008/051725
Other languages
French (fr)
Other versions
WO2009002569A2 (en
Inventor
Zhanhu Guo
Sung Park
Thomas H Hahn
Original Assignee
Univ California
Zhanhu Guo
Sung Park
Thomas H Hahn
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Univ California, Zhanhu Guo, Sung Park, Thomas H Hahn filed Critical Univ California
Publication of WO2009002569A2 publication Critical patent/WO2009002569A2/en
Publication of WO2009002569A3 publication Critical patent/WO2009002569A3/en

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R33/00—Arrangements or instruments for measuring magnetic variables
    • G01R33/02—Measuring direction or magnitude of magnetic fields or magnetic flux
    • G01R33/06—Measuring direction or magnitude of magnetic fields or magnetic flux using galvano-magnetic devices
    • G01R33/09—Magnetoresistive devices
    • G01R33/093—Magnetoresistive devices using multilayer structures, e.g. giant magnetoresistance sensors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B82—NANOTECHNOLOGY
    • B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
    • B82Y25/00—Nanomagnetism, e.g. magnetoimpedance, anisotropic magnetoresistance, giant magnetoresistance or tunneling magnetoresistance

Abstract

Nanocomposites of magnetic nanoparticles in a polymer matrix which has been heat treated is shown to have good giant magnetoresistance characteristics and structural integrity. The flexible nanocomposites were fabricated using a surface-initiated-polymerization (SIP) method. The uniformly distributed nanoparticles within the polymer matrix favor a continuous carbon matrix formation after heat treatment, rendering the transition from insulating to conductive composites. The coercive forces reflect strong particle loading and matrix dependent magnetic properties. One obtained nanocomposites possess fairly good giant magnetoresistance (MR), with a MR of 7.3 % at room temperature and 14 % at 130 K. Furthermore, the formed carbon matrix had a 7 wt.% argon adsorption potential for fuel cell applications. As an example, the method utilizing physicochemical adsorption of an initiator onto the iron-oxide (Fe2O3) nanoparticle surface was used for urethane polymerization in a tetrahydrofuran (THF) solution.
PCT/US2008/051725 2007-01-22 2008-01-22 Electromagnetic nanocomposites and methods of manufacture WO2009002569A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US88606607P 2007-01-22 2007-01-22
US60/886,066 2007-01-22

Publications (2)

Publication Number Publication Date
WO2009002569A2 WO2009002569A2 (en) 2008-12-31
WO2009002569A3 true WO2009002569A3 (en) 2009-02-26

Family

ID=40186226

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2008/051725 WO2009002569A2 (en) 2007-01-22 2008-01-22 Electromagnetic nanocomposites and methods of manufacture

Country Status (1)

Country Link
WO (1) WO2009002569A2 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8882285B2 (en) * 2011-01-18 2014-11-11 Desmond Walsh Illuminating safety glove
WO2013019137A1 (en) 2011-08-04 2013-02-07 Institution Of The Russian Academy Of Sciences Tomsk Scientific Center, Siberian Branch, Russian Academy Of Sciences Oxide ferrimagnetics with spinel structure nanoparticles and iron oxide nanoparticles, biocompatible aqueous colloidal systems comprising nanoparticles, ferriliposomes, and uses thereof
DE102014006519A1 (en) 2014-05-03 2015-11-05 Smart Material Printing B.V. Use of magnetic and / or magnetizable, polymeric micro- and / or nanocomposites for the production of complex, magnetic and / or magnetizable molded parts using additive manufacturers
GB2543604A (en) * 2016-07-20 2017-04-26 Ubicoat Ltd Production of nanoscale powders of embedded nanoparticles
CN110197874A (en) * 2019-05-29 2019-09-03 中国科学院宁波材料技术与工程研究所 Stretchable elastic resistive random access memory of one kind and preparation method thereof

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6627314B2 (en) * 2000-10-06 2003-09-30 Carnegie Mellon University Preparation of nanocomposite structures by controlled polymerization
US6710366B1 (en) * 2001-08-02 2004-03-23 Ultradots, Inc. Nanocomposite materials with engineered properties
US6838486B2 (en) * 2003-01-07 2005-01-04 Aps Laboratory Preparation of metal nanoparticles and nanocomposites therefrom
US6855426B2 (en) * 2001-08-08 2005-02-15 Nanoproducts Corporation Methods for producing composite nanoparticles

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6627314B2 (en) * 2000-10-06 2003-09-30 Carnegie Mellon University Preparation of nanocomposite structures by controlled polymerization
US6710366B1 (en) * 2001-08-02 2004-03-23 Ultradots, Inc. Nanocomposite materials with engineered properties
US6855426B2 (en) * 2001-08-08 2005-02-15 Nanoproducts Corporation Methods for producing composite nanoparticles
US6838486B2 (en) * 2003-01-07 2005-01-04 Aps Laboratory Preparation of metal nanoparticles and nanocomposites therefrom

Also Published As

Publication number Publication date
WO2009002569A2 (en) 2008-12-31

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