Nucleation-Induced Self-Assembly of Multiferroic BiFeO3–CoFe2O4 Nanocomposites

Stratulat, S. M.; Lü, Xiaoli; Morelli, Alessio; Hesse, D.; Erfurth, W.; Alexe, Marin

doi:10.1021/nl401965z

Cited by 69 publications

(73 citation statements)

References 24 publications

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“…However, with regard to the film size and considering the surrounding matrix that the particles are embedded, it seems appropriate to refer to this composite phase connectivity as a 'quasi-(0-3) structure'. In 2013, Stratulat et al 26 reported a novel method about self-assembly process, which was based on patterning the nucleation points through a hard mask, to create large areas of perfectly ordered film with first phase pillars embed in second phase matrix. Similar to this novel process, we also obtained orderly distributed ferromagnetic phase inside ferroelectric matrix by simple method.…”

Section: Resultsmentioning

confidence: 99%

Magnetoelectric quasi-(0-3) nanocomposite heterostructures

Wang

Yao

et al. 2015

Nat Commun

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Magnetoelectric composite thin films hold substantial promise for applications in novel multifunctional devices. However, there are presently shortcomings for both the extensively studied bilayer epitaxial (2-2) and vertically architectured nanocomposite (1-3) film systems, restricting their applications. Here we design a novel growth strategy to fabricate an architectured nanocomposite heterostructure with magnetic quasiparticles (0) embedded in a ferroelectric film matrix (3) by alternately growing (2-2) and (1-3) layers within the film. The new heteroepitaxial films not only overcome the clamping effect from substrate, but also significantly suppress the leakage current paths through the ferromagnetic phase. We demonstrate, by focusing on switching characteristics of the piezoresponse, that the heterostructure shows magnetic field dependence of piezoelectricity due to the improved coupling enabled by good connectivity amongst the piezoelectric and magnetostrictive phases. This new architectured magnetoelectric heterostructures may open a new avenue for applications of magnetoelectric films in micro-devices.

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Section: Resultsmentioning

confidence: 99%

Magnetoelectric quasi-(0-3) nanocomposite heterostructures

Wang

Yao

et al. 2015

Nat Commun

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“…Scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS) of XFO–BFO membranes were performed on a Cu plate using a Hitachi S-4800 field emission machine [10]. The existence of X 2+ and Fe 3+/2+ ions was tested by X-ray photoelectron spectroscopy (XPS) in a Krotos-XSAM 800 multifunctional electron spectrometer using a monochromatic Al Kα radiation.…”

Section: Methodsmentioning

confidence: 99%

“…This was realized previously by embedding small XFO seeds into a thin BFO layer [8], either by surface drilling or prepatterning [9], which guided the growth of the composite. In those previous articles [10], the p–n characterization of the templated nanocomposites was limited to macroscopical measurements at the remanence and interfacial coupling [11], ignoring the enhanced fluorescence at visible and near-infrared range that the few scattering centers can absorb most of the solar spectra.…”

Section: Introductionmentioning

confidence: 99%

Mechanism of Fluorescence Enhancement of Biosynthesized XFe2O4–BiFeO3 (X = Cr, Mn, Co, or Ni) Membranes

Bian

Dong

et al. 2016

Nanoscale Res Lett

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Ferrites–bismuth ferrite is an intriguing option for medical diagnostic imaging device due to its magnetoelectric and enhanced near-infrared fluorescent properties. However, the embedded XFO nanoparticles are randomly located on the BFO membranes, making implementation in devices difficult. To overcome this, we present a facile bio-approach to produce XFe2O4–BiFeO3 (XFO–BFO) (X = Cr, Mn, Co, or Ni) membranes using Shewanella oneidensis MR-1. The perovskite BFO enhances the fluorescence intensity (at 660 and 832 nm) and surface potential difference (−469 ~ 385 meV and −80 ~ 525 meV) of the embedded spinel XFO. This mechanism is attributed to the interfacial coupling of the X–Fe (e− or h+) and O–O (h+) interfaces. Such a system could open up new ideas in the design of environmentally friendly fluorescent membranes.

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“…In the recent studies, methods of fabricating highly ordered CFO mesocrystal-embedded in the BFO matrix have been demonstrated. [95,96] The nucleation centers of CFO are firstly created by the hard mask of gold or anodic aluminum oxide, followed by the deposition of the BFO-CFO mixed system after removing the hard mask. In this manner, the position and density of nanocrystals can be precisely controlled, and so does the tubular interface.…”

Section: Perspectives Of Mesocrystal-embedded Oxide Systemsmentioning

confidence: 99%

Mesocrystal-embedded functional oxide systems

2016

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Mesocrystal-a new class of crystals compared with conventional single crystals and randomly distributed nanocrystal systems-has captured significant attention in recent decades. Current studies have been focused on the advanced synthesis as well as the intriguing properties of mesocrystal. In order to create new opportunities upon functional mesocrystals, they can be regarded as a new functional entirety when integrated with unique matrix environments. The elegant combination of mesocrystals and matrices has enabled researchers to realize enthralling tunabilities and to derive new functionalities that cannot be found in individual components. Therefore, mesocrystal-embedded system forms a new playground towards multifunctionalities. This review article delivers a general roadmap that portrays the enhancement of intrinsic properties and new functionalities driven by novel mesocrystal-embedded oxide systems. An in-depth understanding and breakthroughs achieved in mesocrystal-embedded oxide systems are highlighted. This article concludes with a brief discussion on potential directions and perspectives along this research field.

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Nucleation-Induced Self-Assembly of Multiferroic BiFeO₃–CoFe₂O₄ Nanocomposites

Cited by 69 publications

References 24 publications

Magnetoelectric quasi-(0-3) nanocomposite heterostructures

Magnetoelectric quasi-(0-3) nanocomposite heterostructures

Mechanism of Fluorescence Enhancement of Biosynthesized XFe2O4–BiFeO3 (X = Cr, Mn, Co, or Ni) Membranes

Mesocrystal-embedded functional oxide systems

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