Hierarchical assembly of magnetic L1o-ordered FePt nanoparticles in block copolymer thin films

被引：16

作者：

Aissou, Karim ^{[1
]}

Alnasser, Thomas ^{[2
]}

Pecastaings, Gilles ^{[1
]}

Goglio, Graziella ^{[2
]}

Toulemonde, Olivier ^{[2
]}

Mornet, Stephane ^{[2
]}

Fleury, Guillaume ^{[1
]}

Hadziioannou, Georges ^{[1
]}

机构：

[1] Univ Bordeaux, CNRS, LCPO, UMR 5629, F-33600 Pessac, France

[2] Univ Bordeaux, CNRS, ICMCB, UPR 9058, F-33600 Pessac, France

来源：

JOURNAL OF MATERIALS CHEMISTRY C | 2013年 / 1卷 / 07期

关键词：

PHASE-TRANSFORMATION;

D O I：

10.1039/c2tc00490a

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The self-assembly process and local magnetic properties of asymmetric poly(styrene-block-ethylene oxide) (PS-b-PEO) copolymer thin films blended with L1(o)-ordered FePt nanoparticles are studied. During the solvent annealing process, it is shown that L1(o)-ordered FePt nanoparticles covered with short dopamine-terminated-methoxy poly(ethylene oxide) (mPEO-Dopa) are localized within spherical PEO domains having an inter-domain spacing of about 43.2 nm. The magnetic properties of the nanocomposite thin films were then investigated using magnetic force microscopy (MFM). MFM results reveal that each spot (magnetic signal), resulting from the presence of ferromagnetic NPs (coercive field, H-c similar to 2000 Oe at 300 K), is fully contained in a PEO sphere leading to readily discernible magnetic nanodomains (bits).

引用

页码：1317 / 1321

页数：5

共 23 条

[1] Phase behavior in thin films of cylinder-forming diblock copolymer: Deformation and division of heptacoordinated microdomains [J].

Aissou, Karim ;

Baron, Thierry ;

Kogelschatz, Martin ;

Pascale, Alina .

MACROMOLECULES, 2007, 40 (14) :5054-5059

[2] Nanoscale Block Copolymer Ordering Induced by Visible Interferometric Micropatterning: A Route towards Large Scale Block Copolymer 2D Crystals [J].

Aissou, Karim ;

Shaver, Jonah ;

Fleury, Guillaume ;

Pecastaings, Gilles ;

Brochon, Cyril ;

Navarro, Christophe ;

Grauby, Stephane ;

Rampnoux, Jean-Michel ;

Dilhaire, Stefan ;

Hadziioannou, Georges .

ADVANCED MATERIALS, 2013, 25 (02) :213-217

[3] Hexagonal-to-Cubic Phase Transformation in Composite Thin Films Induced by FePt Nanoparticles Located at PS/PEO Interfaces [J].

Aissou, Karim ;

Fleury, Guillaume ;

Pecastaings, Gilles ;

Alnasser, Thomas ;

Mornet, Stephane ;

Goglio, Graziella ;

Hadziioannou, Georges .

LANGMUIR, 2011, 27 (23) :14481-14488

[4] Self-assembling study of a cylinder-forming block copolymer via a nucleation-growth mechanism [J].

Aissou, Karim ;

Kogelschatz, Martin ;

Baron, Thierry .

NANOTECHNOLOGY, 2009, 20 (09)

[5] Spin-dependent tunneling in self-assembled cobalt-nanocrystal superlattices [J].

Black, CT ;

Murray, CB ;

Sandstrom, RL ;

Sun, SH .

SCIENCE, 2000, 290 (5494) :1131-1134

[6] Nanostructure engineering by templated self-assembly of block copolymers [J].

Cheng, JY ;

Mayes, AM ;

Ross, CA .

NATURE MATERIALS, 2004, 3 (11) :823-828

[7] Phase transformation, coalescence, and twinning of monodisperse FePt nanocrystals [J].

Dai, ZR ;

Sun, SH ;

Wang, ZL .

NANO LETTERS, 2001, 1 (08) :443-447

[8] A materials chemistry perspective on nanomagnetism [J].

Darling, SB ;

Bader, SD .

JOURNAL OF MATERIALS CHEMISTRY, 2005, 15 (39) :4189-4195

[9] Monodisperse face-centred tetragonal FePt nanoparticles with giant coercivity [J].

Elkins, K ;

Li, D ;

Poudyal, N ;

Nandwana, V ;

Jin, ZQ ;

Chen, KH ;

Liu, JP .

JOURNAL OF PHYSICS D-APPLIED PHYSICS, 2005, 38 (14) :2306-2309

[10] Adjustment of block copolymer nanodomain sizes at lattice defect sites [J].

Hammond, MR ;

Sides, SW ;

Fredrickson, GH ;

Kramer, EJ ;

Ruokolainen, J ;

Hahn, SF .

MACROMOLECULES, 2003, 36 (23) :8712-8716

← 1 2 3 →