Schematic representation of microemulsion model).
The traditional W/O microemulsion reaction method has been intensively studied.
Multifunctional Iron Oxide Nanoparticles for …
Review of the various control parameters, characterization tools used, and particle sizes obtained for the synthesis of silver nanoparticles (SNPs), with microemulsion technique information, is provided (Table 1). This information is available free of charge via the Internet at .
The emulsion template method has been successfully used to prepare hollow SiO2 particle. J. H. Park and co-workers,) have prepared hollow SiO2 particles in the w/o emulsion with the presence of surfactants. Their preparation procedures can be briefly described as following: First, an external oil phase was prepared by dissolving hydroxyl propyl cellulose (HPC) in octanol. Here HPC is a stabilizer of emulsion structure. Second, polyvinylpyrrolidone (PVPC) which was used to control the viscosity of water droplet was dissolved into water. Third, the water phase was added to an external oil phase at a stirring rate of 12000 rpm to form a stable emulsion. Then, the reagent TEOS was added into w/o emulsions. TEOS is soluble in the continuous oil phase, but it because water-soluble after its hydrolysis. After hydrolysis, the samples were dried and calcined to form hollow structure. The hollow SiO2 particles produced by this method are shown in .
Synthesis of Nanoparticles - News Medical
19. Narain R, Gonzales M, Hoffman AS, Stayton PS, Krishnan KM. Synthesis of monodisperse biotinylated p(NIPAAM)-coated iron oxide magnetic nanoparticles and their bioconjugation to streptavidin. 2007;23:6299-6304
14. Xu H, Aguilar ZP, Yang L, Kuang M, Duan H, Xiong Y, Wei H, Wang A. Antibody conjugated magnetic iron oxide nanoparticles for cancer cell separation in fresh whole blood. 2011;32:9758-9765
Synthesis of MnCO 3 nanoparticles by ..
Our group has been actively involved in the synthesis of QDs and magnetic QDs (MQDs) [-]. We have successfully demonstrated the magnetic and fluorescent properties of Fe2O3-CdSe MQDs, silica -coated QDs or MQDs and their application in cell labeling (Figure ) . The silanization using aminopropyl triethoxysilane (APS) in a reverse microemulsion produced thin silica coating on bare CdSe QDs or Fe2O3-CdSe MQD with surface NH2 groups. The methoxy groups of APS were hydrolyzed and condensed with another APS, exposing surface amine groups on the silanized QDs (SiO2/QDs) for conjugation with oleyl-O-poly(ethyleneglycol)-succinyl-N-hydroxysuccinimidyl ester, denoted as bio-anchored membrane (BAM). The reaction between the amine group and NHS ester resulted in a covalent amide bond formation, leaving the exposed oleyl group for the effective targeting of cell membrane. The labeling of live cell membranes (HepG2 human liver cancer cells and NIH-3T3 mouse fibroblast cells) using confocal laser scanning microscopy (CLSM) indicated the successful conjugation of silica-coated QDs or MQDs with BAM.
T. Z. Ren and co-workers) prepared hollow TiO2 microspheres with mesoporous crystalline shells with the assistance of non-ionic poly (alkylene oxide) surfactant molecules. The preparation of hollow TiO2 microspheres was performed in a ethanol-surfactant system using decaoxyethylene cetyl ether (C16(EO)10) surfactant as the template. M. S. Wong and co-worker) have reported a room temperature and wet chemical-based synthesis route in which SiO2 and gold (Au) nanoparticles are cooperatively assembled with lysine-cysteine diblock copolypeptides into robust hollow spheres. Key determinants in the formation of the Au/SiO2 hollow sphere (as shown in ) are the ability of the sulfydryl group to form inter and intrachair disulfide bonds and the formation of the Authiolate bonds. Hollow sphere was formed only when the copolypetide was reacted with n-Au prior to reacting with n-SiO2. The n-Au particles were thus found copolypeptide chains into the microsized aggregated around which n-SiO2 attached. The scheme illustration of the assembly process is shown in .
were produced by microemulsion method
Salzemann et al used microemulsion method to ..
24/01/2014 · A green method for the synthesis of Copper Nanoparticles using L-ascorbic acid
Surfactant Effects on Microemulsion-Based ..
Today the synthesis of silver nanoparticles is very common due to their numerous applications in various fields
Surfactant Effects on Microemulsion-Based Nanoparticle ..
Synthesis of Nanoparticles
Synthesis of silver nanoparticles: Chemical, ..
56. Jarett BR, Gustafsson B, Kukis DL, Louie AY. Synthesis of 64Cu-labeled magnetic nanoparticles for multimodal imaging. 2008;19:1496-1504
Synthesis of tio2 nanoparticles by precipitation method
50. Sun C, Kim D, Fang C, Bhattarai N, Veiseh O, Kievit F, Stephen Z, Lee D, Ellenbogen RG, Ratner B, Zhang M. PEG-mediated synthesis of highly dispersive multifunctional superparamagnetic nanoparticles: their physicochemical properties and function . 2010;4:2402-10
Synthesis of Mixed Cu/Ce Oxide Nanoparticles by the ..
SiO2-Au nanoshells offer enormous flexibility to tune the resonance frequency by varying the relative dimensions of the SiO2 core and Au shell. The resonance of SiO2-Au nanoshell particles can easily be positioned in the “water windows” in the near-infrared (800–1300 nm) ranges, where absorption by organism is low. Together with the high degree of biocompatibility of Au nanoshells, these results open the door to a wide variety of biological applications. Halas and West showed nanoshells can be used to enable fast whole blood immunoassays. For conventional blood immunoassays performed at visible wavelengths, the whole procedures need several hours or days owing to a purification step needs to be carried out to separate out a variety of unwanted biomaterials that absorb visible lights. In the immunoassay procedure proposed by Halas and West, nanoshells are conjugated with antibodies, which manifest a strong plasmon related absorption feature with a fast absorption measurement in the water window, circumventing the time-intensive purification step. Halas and West also showed how nanoshells can be incorporated into temperature-sensitive hydrogels to synthesize a new type of composite materials that collapses on laser irradiation. Owing to the tunable absorption feature of nanoshells, SiO2-Au nanoshells were designed to absorb light from laser irradiation and then transform the light to heat around nanoshell, which vaporized water and caused the collapse of hydrogel. Such a remotely addressable hydrogels may find applications in drug delivery and microfluidic values or pumps. F. Caruso and co-workers, ) have reported the fabrication of optically addressable nanostructured capsules comprising a PE multilayer shell doped with light-absorbing Au nanoparticles. Their results indicated both enzyme lysozyme and macromolecules can be encapsulated within the PE/Au shell and the encapsulated samples can be released on demand without significant loss of bioactivity following irradiation with short pulse of near infrared (NIR) laser light.
Synthesis of New Magnetic Nanoparticles and Study ..
J. F. Chen and co-workers, ) have prepared porous hollow SiO2 nanoparticles by using CaCO3 nano-particles as the inorganic template. The hollow particles were uniform spherical particles with a diameter of 60–70 nm, wall thickness of approximately 10 nm. The assynthesized hollow particles were subsequently employed as drug carrier to investigate release behavior of brilliant blue F (BB) in simulated body fluid. The preparation of drug carrying is illustrated as . BB release behavior from dense SiO2 particles and hollow particles were investigated in deionized water solution, as shown in . BB loaded on normal SiO2 nanoparticles exhibited a rapid release of 100 % within 10 min. However, BB loaded into the hollow particles showed a different release style: 60 % of BB was released in the first 10 min, while the other 40 % followed a typical sustained release pattern and was dissolved out slowly and evenly for a time period of 1140 min. This is because that through the BB loaded on the surface of hollow SiO2 is release quickly while the release rate of BB entrapped in the inner core of hollow particles is constrained. The above results suggested that the prepared porous hollow SiO2 nanoparticles could be applied as promising drug vehicles for controlled release systems).
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