Patterning of L1<sub>0</sub>FePt nanoparticles with ultra-high coercivity for bit-patterned media

Meng, Zhengong; Li, Guijun; Wong, Hon Fai; Ng, Sheung Mei; Yiu, Sze Chun; Ho, Cheuk Lam; Leung, Chi Wah; Manners, Ian; Wong, Wai Yeung

doi:10.1039/c6nr07863j

Cited by 46 publications

(31 citation statements)

References 45 publications

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“…All these N, N'-coordinated polyplatinynes were synthesized with satisfactory yields according to the CuI-catalyzed Hagihara's dehydrohalogenation reaction of a diethynylarylene ligand with cis-[PtCl2(diimine)] (Scheme 1). 2,11,16,19 In 2016, a new synthetic pathway of heterobimetallic polymer (P7) through grafting FePt-containing ligand onto the backbone of a random copolymer poly(ethynylstyrene-styrene) was reported. 20 Moreover, by taking advantage of the templating effect of the porphyrin derivatives, different metal atoms were introduced into the macrocyclic center of porphyrin ligands which can then be coupled with the other ligand to generate a series of porphyrin-based metallopolymers with either one or both metal elements in the main chain.…”

Section: Fept-containing and Copt-containing Heterobimetallic Polymersmentioning

confidence: 99%

A molecular approach to magnetic metallic nanostructures from metallopolymer precursors

Dong

Meng

et al. 2018

Chem. Soc. Rev.

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In recent years, metallopolymers have attracted much attention as precursors to generate magnetic metal/metal alloy nanoparticles (NPs) through pyrolysis or photolysis because they offer the advantages of ease of solution processability, atomic level mixing and stoichiometric control over composition. The as-generated NPs usually possess narrow size distributions with precise control of composition and density per unit area. Moreover, patterned NPs can be achieved on various substrates in this way owing to the good film-forming property of metallopolymers and such work is important for many applications based on metal nanostructures. By combining the merits of both the solution processability of metallopolymers and nanoimprint lithography (NIL), a new platform can be created for fabricating bit-patterned media (BPM) and the next-generation of nanoscale ultra-high-density magnetic data storage devices. Furthermore, most of these metallopolymers can be used directly as a negative-tone resist to generate magnetic metallic nanostructures by electron-beam lithography and UV photolithography. Self-assembly and subsequent pyrolysis of metalloblock copolymers can also afford well-patterned magnetic metal or metal alloy NPs in situ with periodicity down to dozens of nanometers. In this review, we highlight the use of metallopolymer precursors for the synthesis of magnetic metal/metal alloy NPs and their nanostructures and the related applications.

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Section: Fept-containing and Copt-containing Heterobimetallic Polymersmentioning

confidence: 99%

A molecular approach to magnetic metallic nanostructures from metallopolymer precursors

Dong

Meng

et al. 2018

Chem. Soc. Rev.

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“…Since the initial report by Sun et al, 4 chemical synthesis has become an extensive route for the fabrication of FePt NPs. [5][6][7][8][9] Normally, the FePt NPs directly synthesized by chemical methods are of the fcc structure. In order to obtain good performance, the particles should be transformed from the fcc to the fct structure by post-annealing.…”

Section: Introductionmentioning

confidence: 99%

Facile liquid-assisted one-step sintering synthesis of superfine L1₀-FePt nanoparticles

Pei

Zhao

et al. 2019

RSC Adv.

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“…The unique electrochemical, physicochemical, magnetic, and optical properties of ferrocene (Fc)‐containing polymers have attracted widespread concerns in the fields of molecular battery, amperometric biosensors, sensors, nanopatterns, drug delivery, electrochromics, and catalysis . Particularly, Fc‐containing polymers could be used as reducing agents to prepare MNPs .…”

Section: Introductionmentioning

confidence: 99%

AuNPs composites of gelatin hydrogels crosslinked by ferrocene‐containing polymer as recyclable supported catalysts

Long

Song

Shi

et al. 2019

J of Applied Polymer Sci

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To fabricate a recyclable supported catalyst based on gold nanoparticles (AuNPs) and gelatin hydrogel (HG) composites, a ferrocene (Fc)-containing tetrablock copolymer [P(NCHO-b-NFc-b-NTEG-b-NCHO)] was used as both reducing and stabilizing agents for AuNPs and as a crosslinker for HG. First, the effects of Fc-containing polymers, including homopolymer PNFc and copolymer P(NCHO-b-NFc-b-NTEG-b-NCHO), and different solvent systems on the morphology and aggregation of AuNPs were examined by using ultraviolet-visible spectroscopy, transmission electron microscopy, and dynamic light scattering. Second, two strategies (blending and soaking) were applied to prepare different AuNPs/HG composites (AuNPs-HG), and their structure and properties were studied by using various techniques including scanning electron microscopy, X-ray diffraction, and thermogravimetry. Finally, the catalytic performance and reusability of AuNPs-HG-1 (via blending) and AuNPs-HG-2 (via soaking) were evaluated utilizing the model catalytic reduction of 4-nitrophenol to 4-aminophenol by NaBH 4 . Results indicated that P(NCHO-b-NFc-b-NTEG-b-NCHO) dissolved in N,Ndimethylformamide was the optimal reductant and stabilizer to prepare AuNPs. The in situ reduction of Au III ions to Au 0 particles was very essential for the fabrication of AuNPs-HG in terms of hydrogel pore size, Au 0 distribution and immobilization stability, and hydrogel thermal stability. Due to the stronger interactions among AuNPs, P(NCHO-b-NFc-b-NTEG-b-NCHO), and gelatin molecules in the blending strategy, AuNPs-HG-1 showed better mechanical stability and catalytic performance and more reusing cycles than AuNPs-HG-2. This work highlights the design and fabrication of robust recyclable supported AuNP catalyst by using eco-friendly Fccontaining HGs.

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Patterning of L1₀FePt nanoparticles with ultra-high coercivity for bit-patterned media

Cited by 46 publications

References 45 publications

A molecular approach to magnetic metallic nanostructures from metallopolymer precursors

A molecular approach to magnetic metallic nanostructures from metallopolymer precursors

Facile liquid-assisted one-step sintering synthesis of superfine L1₀-FePt nanoparticles

AuNPs composites of gelatin hydrogels crosslinked by ferrocene‐containing polymer as recyclable supported catalysts

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Patterning of L10FePt nanoparticles with ultra-high coercivity for bit-patterned media

Cited by 46 publications

References 45 publications

A molecular approach to magnetic metallic nanostructures from metallopolymer precursors

A molecular approach to magnetic metallic nanostructures from metallopolymer precursors

Facile liquid-assisted one-step sintering synthesis of superfine L10-FePt nanoparticles

AuNPs composites of gelatin hydrogels crosslinked by ferrocene‐containing polymer as recyclable supported catalysts

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Patterning of L1₀FePt nanoparticles with ultra-high coercivity for bit-patterned media

Facile liquid-assisted one-step sintering synthesis of superfine L1₀-FePt nanoparticles