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Superparamagnetic Iron Oxide Nanoparticles as MRI …

Keywords: stem cells, superparamagnetic iron oxide nanoparticles, labeling, tracking, magnetic resonance imaging.

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Synthesis and applications of CdSe nanoparticles M

53. Song M, Moon WK, Kim Y, Lim D, Song IC, Yoon BW. Labeling efficacy of superparamagnetic iron oxide nanoparticles to human neural stem cells: Comparison of ferumoxides, monocrystalline iron oxide, cross-linked iron oxide (CLIO)-NH2 and tat-CLIO. 2007;8:365-71

Bio-controlled synthesis of nanoparticles with optical and magnetic properties1045

Ganganagappa Nagaraju, Gujjarahalli Thimmanna Chandrappa. Surfactant Assisted Hydrothermal Synthesis of CdSe Nanostructural Materials. J Mater Sci Technol, 2012, 28(6): 495-499.

Hydrothermal Routes for the Synthesis of CdSe Core ..

CdSe/CdS core-shell nanocrystals were one-step prepared by microwave-hydrothermal method. The growth mechanism of nanoparticles was discussed and attributed to the sulfur release process from mercaptopropionic acid. The results from XRD and Raman spectra suggested that the core-shell CdSe/CdS nanocrystals were obtained under the reaction temperature of 140℃. FTIR spectra were in situ monitored for the decomposition of mercaptopropionic acid upon reaction time, which contributed to the formation of CdS shells. The band-related and trap states fluorescent emission from nanocrystals were both observed in PL spectra. The increased band related emission intensity further verified the formation of core/shell structure of CdSe nanocrystals.

In this paper, the multi-walled carbon nanotubes (MWCNTs) were used as start material and functionalized by m-chlorperbenzoic acid (MCPBA). Then the CNT-CdSe composite were prepared directly via a conventional hydrothermal method. The intrinsic characteristics of resulting composite were studied by X-ray diffraction (XRD), scanning electron microscopy (SEM) with energy dispersive X-ray (EDX), transmission electron microscopy (TEM) analysis and UV-vis diffuse reflectance spectrophotometer. The photocatalytic activity of the as-synthesized samples was evaluated by degrading methylene blue (MB) under irradiation of visible light.

SYNTHESIS OF ULTRA-SMALL CdSe QUANTUM DOTS

CdSe/CdS core-shell nanocrystals were one-step prepared by microwave-hydrothermal method. The growth mechanism of nanoparticles was discussed and attributed to the sulfur release process from mercaptopropionic acid. The results from XRD and Raman spectra suggested that the core-shell CdSe/CdS nanocrystals were obtained under the reaction temperature of 140℃. FTIR spectra were in situ monitored for the decomposition of mercaptopropionic acid upon reaction time, which contributed to the formation of CdS shells. The band-related and trap states fluorescent emission from nanocrystals were both observed in PL spectra. The increased band related emission intensity further verified the formation of core/shell structure of CdSe nanocrystals.

This paper describes a sol−gel approach for the coating of superparamagnetic iron oxide nanoparticles with uniform shells of amorphous silica. The coating process has been successfully applied to particles contained in a commercial ferrofluid (e.g., the EMG 304 of Ferrofluidics) and those synthesized through a wet chemical process. The thickness of silica coating could be conveniently controlled in the range of 2−100 nm by changing the concentration of the sol−gel solution. Fluorescent dyes, for example, 7-(dimethylamino)-4-methylcoumarin-3-isothiocyanate (DACITC) and tetramethylrhodamine-5-isothiocyanate (5-TRITC), have also been incorporated into the silica shells by covalently coupling these organic compounds with the sol−gel precursor. These multifunctional nanoparticles are potentially useful in a number of areas because they can be simultaneously manipulated with an externally applied magnetic field and characterized in situ using conventional fluorescence microscopy.

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  • Improved Hydrothermal Synthesis of CdSe ..

    A Rapid Hot-Injection Method for the Improved Hydrothermal Synthesis of CdSe ..

  • Synthesis of CdS Nanoparticles - YouTube

    Chromium Selenide Nanoparticles: Hydrothermal Synthesis in the Presence of ..

  • Hydrothermal Routes for the Synthesis of CdSe Core …

    AbstractDifferent kind of metal ion doped CdSe quantum dots (QDs) are synthesized by a simple hydrothermal method

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Molten-droplet synthesis of composite CdSe hollow nanoparticles

Hydrophilic SPIONs for biological application usually consist of an iron oxide core and a surface coating. On one hand, synthesis methods of the iron oxide core, stabilizer and reaction parameters have significant effects on the size and magnetic properties of SPIONs [, -]. On the other hand, surface coating materials, functionalization materials and surface engineering methods significantly affect ultimate size in living fluid, biocompatibility, cell internalization and duration in cells [, , , ]. Therefore, to prepare ideal SPIONs, major factors such as core synthesis, surface coating and functional materials, and surface engineering methods should be carefully considered.

Synthesis of CdSe/ZnS and CdTe/ZnS quantum dots

A variety of methods have been reported by many researchers for the synthesis of ZnS:Mn nanoparticles including chemical precipitation method at room temperature with and without capping agent, chemical precipitation methods were also performed at different temperatures

Synthesis of CdSe/ZnS and CdTe/ZnS quantum dots: ..

A variety of methods have been reported by many researchers for the synthesis of ZnS:Mn nanoparticles including chemical precipitation method at room temperature with and without capping agent, chemical precipitation methods were also performed at different temperatures ">

"Synthesis of indium nanoparticles: ..

Carbon nanotube-cadmium selenide (CNT-CdSe) composite was synthesized by a facile hydrothermal method derived from multi-walled carbon nanotubes as a stating material. The as-prepared products were characterized by X-ray diffraction, scanning electron microscopy with energy dispersive X-ray analysis, transmission electron microscopy (TEM), and UV-vis diffuse reflectance spectrophotometer. The as-synthesized CNT-CdSe composite efficiently catalyzed the photodegradation of methylene blue in aqueous solutions under visible-light irradiation, exhibiting higher photocatalytic activity.

Easy and fast zero-valent copper and iron nanoparticles synthesis

Although many synthetic routes have been developed for the preparation of iron oxide core with tunable shape, size and magnetization, several challenges remain for the naked SPIONs in terms of stem cell labeling, including: (i) poor water solubility and tendency of aggregation due to large surface/volume ratio; (ii) low cellular uptake efficiency; (iii) potential toxicity. To address these problems, the most straightforward and effective method seems to be coating the iron oxide core by a layer. The nature of the surface coatings and modification methods determine the physical and biologic properties such as the overall size, surface charge, coating density, toxicity and degradability, which finally affect the fate of SPIONPs in the cells [, ]. This following section focuses on the currently used surface modification materials (e.g. PLL, PEI, chitosan, PEG, citric acid and so on) and methods (e.g. coating, post-synthesis coatings including blending, polymerization, ligand exchange) for the SPIONs applied for stem cell labeling and tracking. The influence of these factors on labeling efficiency and biocompatibility is also discussed.

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