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Quantum dots (QDs) nanoparticles are increasingly being used for biomedical applications. Most QDs consist of heavy metal which may be potentially toxic to biological organisms. In this study, CdTe/ZnS core/shell QDs were evaluated for their harmful effects on Escherichia coli, which served as model for potential impact to microorganisms and microbial cell toxicity. Organic soluble CdTe and CdTe/ZnS...
A new procedure for preparing iron oxide-silica nanocomposite particles using SBA-15 mesoporous silica as a template is described. These composite materials retained the 2-D hexagonal structure of the SBA-15 template. Transmission electron micrograms of the particles depicted the formation of iron oxide nanocrystals inside the mesochannels of SBA-15 silica framework. Powder x-ray diffraction showed...
Microfluidic reactors with a design of steep temperature step or in microwave irradiation were utilized for preparation of LaF3/LaPO4: Ce, Tb nanocrystals using diethylene glycol (DEG) or ethylene glycol (EG) as solvent. Microfluidic reactor in special designs could separate the nucleation and growth of crystallization for shape-control and better bio-properties. The monodisperse and water-soluble...
This paper describes the synthesis of Fe3O4/Poly[3-(trimethylamlno)ethyl methacrylate iodine] (PTMAI) /CdTe bifunctional nano gene vector for targeting DNA delivery. In this approach, Poly[2-(dimethylamlno)ethyl methacrylate] (PDMA) was grafted on the Fe3O4 nanoparticles by surface-initiated transfer radical polymerization (ATRP). The ternary amine groups of PDMA can be alkylated by the iodomethane...
Hydroxyapatite (hydroxyfluorapatite) - collagen and composite materials are synthesized using directed diffusion of ions from solutions on collagen fibers. Computer tomography indicates that the salt component is rather uniformly distributed over the organic matrix. According to the electron microscopic data,the composite materials involve salt nanocrystals (less than 1m in size), which are uniformly...
Nano-hydrogel is one of the most promising drug carrier for its sensitivity to environmental stimulus. For in vivo optical imaging of nano-hydrogel, the development of novel contrast agents with near-infrared (NIR) fluorescence is especially important. Poly-N-isopropylacrylamide-co-acrylic acid (PNIPA-co-AA) nano-hydrogel was synthesized by precipitation polymerization method. The regulation on the...
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