Magnetite nanoparticles with tunable gold or silver shell

Mandal, Manas K.; Kundu, Subrata; Ghosh, Sujit Kumar; Panigrahi, Sudipa; Sau, Tapan K.; Yusuf, Salim; Pal, Tarasankar

doi:10.1016/j.jcis.2005.01.013

Cited by 278 publications

(164 citation statements)

References 47 publications

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“…Core-shell NPs (M x F e 3−x O 4 @Au or Au@M x F e 3−x O 4 ) with different shapes [157,158,159] are also designed in nanomedecine to promote multifunctional NPs [160]. The gold part which may display different shapes such as nanorods may be used for near-infrared fluorescence imaging, for radiosensitization and for the photothermal ablation of cancer cells.…”

Section: Core/shell Magnetic Oxide For Biomedical and Data Storage Apmentioning

confidence: 99%

“…In most cases iron oxide NPs coated with gold or iron shells retain their ferri-or antiferro-magnetic properties [157,158]. Very small superparamagnetic iron oxide NPs (SPION) coated with a gold shell displayed a slight shift From Noginov et al [195].…”

Section: Magneto-plasmonic Core/shellsmentioning

confidence: 99%

“…(decrease) of the blocking temperature and a decrease in their susceptibility in comparison to the uncoated NPs, which is believed to reflect the less efficient coupling of the magnetic cores as a result of interparticle spacing [78,200,201,157] In contrast, the plasmonic properties of the metallic shell are strongly influenced by the high dielectric constant of the magnetic cores. Indeed, gold shells grown on magnetite exhibit a surface plasmon resonance at larger wavelengths compared to shells of similar size grown over silica.…”

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confidence: 99%

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Engineered inorganic core/shell nanoparticles

et al. 2014

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It has been for a long time recognized that nanoparticles are of great scientific interest as they are effectively a bridge between bulk materials and atomic structures. At first, size effects occurring in single elements have been studied. More recently, progress in chemical and physical synthesis routes permitted the preparation of more complex structures. Such structures take advantages of new adjustable parameters including stoichiometry, chemical ordering, shape and segregation opening new fields with tailored materials for biology, mechanics, optics magnetism, chemistry catalysis, solar cells and microelectronics. Among them, core/shell structures are a particular class of nanoparticles made with an inorganic core and one or several inorganic shell layer(s). In earlier work, the shell was merely used as a protective coating for the core. More recently, it has been shown that it is possible to tune the physical properties in a larger range than that of each material taken separately. The goal of the present review is to discuss the basic properties of the different types of core/shell nanoparticles including a large variety of heterostructures. We restrict ourselves on all inorganic (on inorganic/inorganic) core/shell structures. In the light of recent developments, the applications of inorganic core/shell particles are found in many fields including biology, chemistry, physics and engineering. In addition to a representative overview 2 of the properties, general concepts based on solid state physics are considered for material selection and for identifying criteria linking the core/shell structure and its resulting properties. Chemical and physical routes for the synthesis and specific methods for the study of core/shell nanoparticle are briefly discussed.

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Section: Core/shell Magnetic Oxide For Biomedical and Data Storage Apmentioning

confidence: 99%

Section: Magneto-plasmonic Core/shellsmentioning

confidence: 99%

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confidence: 99%

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Engineered inorganic core/shell nanoparticles

et al. 2014

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“…7 Fe 3 O 4 magnetic particles for this study were prepared following the method reported by Mandal et al 8 with some modifications. The iron solution was made using ferrous ammonium sulphate and ferric ammonium sulphate with a molar ratio 1:2 and 0.4M of aqueous sulphuric acid.…”

Section: -4mentioning

confidence: 99%

Magnetoimpedance biosensor for Fe3O4 nanoparticle intracellular uptake evaluation

Kumar

Mohapatra

Fal-Miyar

et al. 2007

Applied Physics Letters

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Iron oxide (Fe3O4) nonspecific nanoparticles of 30nm are embedded inside human embryonic kidney (HEK 293) cells by intracellular uptake with a concentration of ∼105 particles/cell. An amorphous ribbon of Co64.5Fe2.5Cr3Si15B15 exhibiting large magnetoimpedance (MI) serves as the sensing element. The presence of fringing fields of the nanoparticles changes the superposition of the constant applied field and the alternating field created by a current flowing through the ribbon that can be detected as a change in MI. This response is clearly dependent on the presence of the magnetic nanoparticles inside the cells and on the value of the external field.

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“…T h e F e 3 O 4 c o r e s w e r e s y n t h e s i z e d b y a coprecipitation technique, well described by Mandal et al [52], and various other articles, using ferrous and ferric salts to form Fe 3 O 4 [53][54][55]. …”

Section: Synthesis Of Goldcoated Magnetite Nanoparticlesmentioning

confidence: 99%

Quantum Dot Conjugated Magnetic Nanoparticles for Targeted Drug Delivery and Imaging

Venugopal¹,

Pernal²,

Fusinatto³

et al. 2016

Nano BioMed ENG

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Nanotechnology is being increasingly applied for developing drug delivery options for specific treatments. Magnetic nanoparticles have drawn attention as drug delivery vehicles due to their stability, biocompatibility and ability to be non-invasively guided to desired target areas using magnetic fields. In this paper, we describe a new delivery vehicle for magnetic drug targeting. In magnetic drug targeting, drug functionalized magnetic nanoparticles are guided and localized at specific sites using external magnetic fields. Magnetic nanoparticles act as contrast agents for magnetic resonance imaging. However, it cannot be visualized via this technique during drug delivery. This is between magnetic fields used for imaging and delivery can interference with each other. Our laboratory has synthesized a magnetic drug targeting vehicle conjugated with quantum dots that can be imaged during the drug delivery process with in vivo imaging techniques such as fluorescence molecular tomography. These nanocomposites can be used as drug delivery vehicles for the central nervous system, where drug targeting is especially difficult and minimizing side effects is critical.

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Magnetite nanoparticles with tunable gold or silver shell

Cited by 278 publications

References 47 publications

Engineered inorganic core/shell nanoparticles

Engineered inorganic core/shell nanoparticles

Magnetoimpedance biosensor for Fe3O4 nanoparticle intracellular uptake evaluation

Quantum Dot Conjugated Magnetic Nanoparticles for Targeted Drug Delivery and Imaging

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