Biogenic and biomimetic magnetic nanosized assemblies

Lu, Yang; Dong, Liang; Zhang, Le-Cheng; Su, Yude; Yu, Shu‐Hong

doi:10.1016/j.nantod.2012.06.011

Cited by 49 publications

(36 citation statements)

References 176 publications

(191 reference statements)

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“…While there have been a few excellent reports on the current progress on the approaches that have been proposed for the controlled aggregation of inorganic nanocrystals into mesoscale structures, as well as on their diverse applications [71][72][73][74][75][76], a systematic guideline for the evaluation and optimization of their magnetic properties as these are raised from the applicationspecific point of view are missing. The purpose of the present work is to pay attention to the evaluation of the mechanisms contributing to their collective magnetic behavior, while importantly, pointing to the critical role of the microscopic dynamic phenomena in the design of such technologically useful nanostructures.…”

Section: Introductionmentioning

confidence: 99%

Colloidal magnetic nanocrystal clusters: variable length-scale interaction mechanisms, synergetic functionalities and technological advantages

Κωστοπούλου

Lappas

2015

Nanotechnology Reviews

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Magnetic particles of optimized nanoscale dimensions can be utilized as building blocks to generate colloidal nanocrystal assemblies with controlled size, well-defined morphology, and tailored properties. Recent advances in the state-of-the-art surfactant-assisted approaches for the directed aggregation of inorganic nanocrystals into cluster-like entities are discussed, and the synthesis parameters that determine their geometrical arrangement are highlighted. This review pays attention to the enhanced physical properties of iron oxide nanoclusters, while it also points to their emerging collective magnetic response. The current progress in experiment and theory for evaluating the strength and the role of intra-and inter-cluster interactions is analyzed in view of the spatial arrangement of the component nanocrystals. Numerous approaches have been proposed for the critical role of dipole-dipole and exchange interactions in establishing the nature of the nanoclusters' cooperative magnetic behavior (be it ferromagnetic or spin-glass like). Finally, we point out why the purposeful engineering of the nanoclusters' magnetic characteristics, including their surface functionality, may facilitate their use in diverse technological sectors ranging from nanomedicine and photonics to catalysis.

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Section: Introductionmentioning

confidence: 99%

Colloidal magnetic nanocrystal clusters: variable length-scale interaction mechanisms, synergetic functionalities and technological advantages

Κωστοπούλου

Lappas

2015

Nanotechnology Reviews

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“…To fabricate nanovesicles with good biodegradability and novel biological functions, scientists increasingly draw lessons from nature for inspiration[1–3]. In recent years, nanovesicles based on bio-inspired synthesis have been developed, aiming at simulating unique properties of natural organism/structures/biosynthesis pathways [4]. These biomimetic delivery vehicles whose morphology, surface properties and size imitate natural organism such as red bood cells (RBC) [5], exosomes[6] or pathogens[7, 8], possess special functions to enhance delivery to target tissues or cell populations.…”

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confidence: 99%

Nanobiotechnology: Cell membrane-based delivery systems

2017

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Summary The increasingly rapid pace of research in the field of bioinspired drug delivery systems is revealing the promise of cell membrane-based nanovesicles for biomedical applications. Those cell membrane-based nanoparticles combine the natural functionalities of cell plasma membranes and the bioengineering flexibility of synthetic nanomaterials, and such versatility provides a means of designing exciting new drug formulations for personalized treatment in future nanomedicine.

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“…2b. A large scale of homogeneous and monodisperse NCs with an average diameter of about 80–100 nm were observed and the average diameter was statistically obtained to be 90 ± 12 nm, which were similar to the biogenic greigite nanocrystals472330. The phase and purity of the as prepared GMNCs were examined by X-ray diffraction (XRD) with 2θ range of 5°–65° (Fig.…”

Section: Resultsmentioning

confidence: 80%

“…Since the discovery of magnetite nanocrystals (NCs) in magnetotactic microorganism123, magnetic magnetosome containing either magnetite or greigite has attracted wide attention in the past years4. Interestingly in magnetotactic microorganism, the magnetic nanocrystals always existed in the form of ‘magnetosome’ through being surrounded by bilayer lipid membrane which is decorated by protein.…”

mentioning

confidence: 99%

Bioinspired greigite magnetic nanocrystals: chemical synthesis and biomedicine applications

Feng

Yang

et al. 2013

Sci Rep

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Large scale greigite with uniform dimensions has stimulated significant demands for applications such as hyperthermia, photovoltaics, medicine and cell separation, etc. However, the inhomogeneity and hydrophobicity for most of the as prepared greigite crystals has limited their applications in biomedicine. Herein, we report a green chemical method utilizing β-cyclodextrin (β-CD) and polyethylene glycol (PEG) to synthesize bioinspired greigite (Fe3S4) magnetic nanocrystals (GMNCs) with similar structure and magnetic property of magnetosome in a large scale. β-CD and PEG is responsible to control the crystal phase and morphology, as well as to bound onto the surface of nanocrystals and form polymer layers. The GMNCs exhibit a transverse relaxivity of 94.8 mM−1s−1 which is as high as iron oxide nanocrystals, and an entrapment efficiency of 58.7% for magnetic guided delivery of chemotherapeutic drug doxorubicin. Moreover, enhanced chemotherapeutic treatment of mice tumor was obtained via intravenous injection of doxorubicin loaded GMNCs.

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Biogenic and biomimetic magnetic nanosized assemblies

Cited by 49 publications

References 176 publications

Colloidal magnetic nanocrystal clusters: variable length-scale interaction mechanisms, synergetic functionalities and technological advantages

Colloidal magnetic nanocrystal clusters: variable length-scale interaction mechanisms, synergetic functionalities and technological advantages

Nanobiotechnology: Cell membrane-based delivery systems

Bioinspired greigite magnetic nanocrystals: chemical synthesis and biomedicine applications

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