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Nanostructured Bimetallic Block Copolymers as Precursors to Magnetic FePt Nanoparticles

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Nanostructured Bimetallic Block Copolymers as Precursors to Magnetic FePt Nanoparticles. / Yiu, Sze Chun; Nunns, Adam; Ho, Cheuk Lam; Ngai, Jenner Ho Loong; Meng, Zhengong; Li, Guijun; Gwyther, Jessica; Whittell, George R.; Manners, Ian; Wong, Wai Yeung.

In: Macromolecules, Vol. 52, No. 9, 14.05.2019, p. 3176-3186.

Research output: Contribution to journalArticle

Harvard

Yiu, SC, Nunns, A, Ho, CL, Ngai, JHL, Meng, Z, Li, G, Gwyther, J, Whittell, GR, Manners, I & Wong, WY 2019, 'Nanostructured Bimetallic Block Copolymers as Precursors to Magnetic FePt Nanoparticles', Macromolecules, vol. 52, no. 9, pp. 3176-3186. https://doi.org/10.1021/acs.macromol.9b00088

APA

Yiu, S. C., Nunns, A., Ho, C. L., Ngai, J. H. L., Meng, Z., Li, G., ... Wong, W. Y. (2019). Nanostructured Bimetallic Block Copolymers as Precursors to Magnetic FePt Nanoparticles. Macromolecules, 52(9), 3176-3186. https://doi.org/10.1021/acs.macromol.9b00088

Vancouver

Yiu SC, Nunns A, Ho CL, Ngai JHL, Meng Z, Li G et al. Nanostructured Bimetallic Block Copolymers as Precursors to Magnetic FePt Nanoparticles. Macromolecules. 2019 May 14;52(9):3176-3186. https://doi.org/10.1021/acs.macromol.9b00088

Author

Yiu, Sze Chun ; Nunns, Adam ; Ho, Cheuk Lam ; Ngai, Jenner Ho Loong ; Meng, Zhengong ; Li, Guijun ; Gwyther, Jessica ; Whittell, George R. ; Manners, Ian ; Wong, Wai Yeung. / Nanostructured Bimetallic Block Copolymers as Precursors to Magnetic FePt Nanoparticles. In: Macromolecules. 2019 ; Vol. 52, No. 9. pp. 3176-3186.

Bibtex

@article{dd3126a679cd41eaa8f33e0f3c40aafe,
title = "Nanostructured Bimetallic Block Copolymers as Precursors to Magnetic FePt Nanoparticles",
abstract = "Phase-separated block copolymers (BCPs) that function as precursors to arrays of FePt nanoparticles (NPs) are of potential interest for the creation of media for the next-generation high-density magnetic data storage devices. A series of bimetallic BCPs has been synthesized by incorporating a complex containing Fe and Pt centers into the coordinating block of four different poly(styrene-b-4-vinylpyridine)s (PS-b-P4VPs, P1-P4). To facilitate phase separation for the resulting metalated BCPs (PM1-PM4), a loading of the FePt-bimetallic complex corresponding to ca. 20{\%} was used. The bulk and thin-film self-assembly of these BCPs was studied by transmission electron microscopy (TEM) and atomic force microscopy, respectively. The spherical and cylindrical morphologies observed for the metalated BCPs corresponded to those observed for the metal-free BCPs. The products from the pyrolysis of the BCPs in bulk were also characterized by TEM, powder X-ray diffraction, and energy-dispersive X-ray spectroscopy, which indicated that the FePt NPs formed exist in an fct phase with average particle sizes of ca. 4-8 nm within a carbonaceous matrix. A comparison of the pyrolysis behavior of the metalated BCP (PM3), the metalated P4VP homopolymer (PM5), and the molecular model organometallic complex revealed the importance of using a nanostructured BCP approach for the synthesis of ferromagnetic FePt NPs with a smaller average NP size and a close to 1:1 Fe/Pt stoichiometric ratio.",
author = "Yiu, {Sze Chun} and Adam Nunns and Ho, {Cheuk Lam} and Ngai, {Jenner Ho Loong} and Zhengong Meng and Guijun Li and Jessica Gwyther and Whittell, {George R.} and Ian Manners and Wong, {Wai Yeung}",
year = "2019",
month = "5",
day = "14",
doi = "10.1021/acs.macromol.9b00088",
language = "English",
volume = "52",
pages = "3176--3186",
journal = "Macromolecules",
issn = "0024-9297",
publisher = "American Chemical Society",
number = "9",

}

RIS - suitable for import to EndNote

TY - JOUR

T1 - Nanostructured Bimetallic Block Copolymers as Precursors to Magnetic FePt Nanoparticles

AU - Yiu, Sze Chun

AU - Nunns, Adam

AU - Ho, Cheuk Lam

AU - Ngai, Jenner Ho Loong

AU - Meng, Zhengong

AU - Li, Guijun

AU - Gwyther, Jessica

AU - Whittell, George R.

AU - Manners, Ian

AU - Wong, Wai Yeung

PY - 2019/5/14

Y1 - 2019/5/14

N2 - Phase-separated block copolymers (BCPs) that function as precursors to arrays of FePt nanoparticles (NPs) are of potential interest for the creation of media for the next-generation high-density magnetic data storage devices. A series of bimetallic BCPs has been synthesized by incorporating a complex containing Fe and Pt centers into the coordinating block of four different poly(styrene-b-4-vinylpyridine)s (PS-b-P4VPs, P1-P4). To facilitate phase separation for the resulting metalated BCPs (PM1-PM4), a loading of the FePt-bimetallic complex corresponding to ca. 20% was used. The bulk and thin-film self-assembly of these BCPs was studied by transmission electron microscopy (TEM) and atomic force microscopy, respectively. The spherical and cylindrical morphologies observed for the metalated BCPs corresponded to those observed for the metal-free BCPs. The products from the pyrolysis of the BCPs in bulk were also characterized by TEM, powder X-ray diffraction, and energy-dispersive X-ray spectroscopy, which indicated that the FePt NPs formed exist in an fct phase with average particle sizes of ca. 4-8 nm within a carbonaceous matrix. A comparison of the pyrolysis behavior of the metalated BCP (PM3), the metalated P4VP homopolymer (PM5), and the molecular model organometallic complex revealed the importance of using a nanostructured BCP approach for the synthesis of ferromagnetic FePt NPs with a smaller average NP size and a close to 1:1 Fe/Pt stoichiometric ratio.

AB - Phase-separated block copolymers (BCPs) that function as precursors to arrays of FePt nanoparticles (NPs) are of potential interest for the creation of media for the next-generation high-density magnetic data storage devices. A series of bimetallic BCPs has been synthesized by incorporating a complex containing Fe and Pt centers into the coordinating block of four different poly(styrene-b-4-vinylpyridine)s (PS-b-P4VPs, P1-P4). To facilitate phase separation for the resulting metalated BCPs (PM1-PM4), a loading of the FePt-bimetallic complex corresponding to ca. 20% was used. The bulk and thin-film self-assembly of these BCPs was studied by transmission electron microscopy (TEM) and atomic force microscopy, respectively. The spherical and cylindrical morphologies observed for the metalated BCPs corresponded to those observed for the metal-free BCPs. The products from the pyrolysis of the BCPs in bulk were also characterized by TEM, powder X-ray diffraction, and energy-dispersive X-ray spectroscopy, which indicated that the FePt NPs formed exist in an fct phase with average particle sizes of ca. 4-8 nm within a carbonaceous matrix. A comparison of the pyrolysis behavior of the metalated BCP (PM3), the metalated P4VP homopolymer (PM5), and the molecular model organometallic complex revealed the importance of using a nanostructured BCP approach for the synthesis of ferromagnetic FePt NPs with a smaller average NP size and a close to 1:1 Fe/Pt stoichiometric ratio.

UR - http://www.scopus.com/inward/record.url?scp=85064990648&partnerID=8YFLogxK

U2 - 10.1021/acs.macromol.9b00088

DO - 10.1021/acs.macromol.9b00088

M3 - Article

VL - 52

SP - 3176

EP - 3186

JO - Macromolecules

JF - Macromolecules

SN - 0024-9297

IS - 9

ER -