nanoparticles – Page 19 – TechConnect Briefs

Manufacture of ultrafine drug particles via the Rapid Expansion of Supercritical Solution (RESS) Process using Taguchi approach

Asghari I., Esmaeilzadeh F., Shiraz University, IR

A multitude of pharmaceutical substances are often insoluble or only slightly soluble in aqueous media and the application of oral or injectable drugs is often limited by its low bioavailability. Recently, there have been great [...]

Synthesis of highly-doped silicon and germanium nanoparticles in a low-pressure plasma-reactor for thermoelectric and solar applications

Grimm H., Petermann N., Gupta A., Wiggers H., University of Duisburg-Essen, DE

Microwave-plasma induced thermal decomposition of gaseous precursors like germane (GeH4) and silane (SiH4) is used to synthesize semiconductor nanoparticles for thermoelectric and thermal applications. P and n-doping can be achieved by mixing silane and germane [...]

Synthesis of Sulfated and Carbon-Coated Al2O3 Aerogels and Their Activity in Dehydrochlorination of 1-Chlorobutane and (2-Chloroethyl)ethyl Sulfide

Bedilo A.F., Volodin A.M., Klabunde K.J., Boreskov Institute of Catalysis, RU

Alumina is widely used as a sorbent and catalyst support. These applications typically require high surface area, stability in the used environment and often the presence of specific groups on the surface. Many of these [...]

Gas phase synthesis of silica nanoparticles in a hybrid microwave-plasma hot-wall reactor

Abdali A., Moritz B., Wiggers H., Schulz C., University of Duisburg-Essen, DE

A microwave plasma reactor was constructed for gas phase synthesis of silica nanoparticles from tetraethoxysilane and a subsequent hot-wall furnace was used to enable for different temperature/time profiles. This combination has enabled us to investigate [...]

Evaluation of Tools for Nanoparticles-modulated Hyperthermia by Atomic Force Microscopy

Reshetov I.V., Chissov V.I., Sukharev S.S., Matorin O.V., Korizky A.V., P.A.Hertzen Moscow Research Oncological Institute (MROI), RU

Some of the properties of the medicinal forms and tools, supposed to be used as hyperthermia modulators, can be evaluated by the atomic force microscopy (AFM): sizes and concentration of nanoparticles, their capability for the [...]

In-situ Surface Characterization of Nano- and Microparticles by Optical Second Harmonic Generation

Schürer B., Wunderlich S., Peschel U., Peukert W., University of Erlangen-Nuremberg, DE

We use optical Second Harmonic Generation (SHG) to probe different kinds of surface properties of dispersed particle systems in in-situ and in real time. Examples for applications are the direct study of molecular adsorption at [...]

Using Nanoparticles and Carbon Nanotubes to Enhance the Properties of a Lead-free Solder

Nai S.M.L., Han Y.D., Jing H.Y., Tan C.M., Wei J., Gupta M., Singapore Institute of Manufacturing Technology, SG

Solders are used in various levels of electronic assembly sequence, whereby good electrical, thermal and mechanical performances of solder are necessary. With miniaturization of devices, diverse functional requirements and ever-stricter operating environments of devices, the [...]

Nanoparticle synthesis using polyelectrolyte nanoreactors

Anderson D.J., Dinglasan J., Goh J.B., Goh M.C., Veletanlic E., Goh J.B., Goh M.C., Vive Nano, CA

We report a facile method to synthesize a wide range of nanoparticles via polyelectrolyte nanoreactors. The nanoreactors are formed through ion-induced collapse of highly extended, high molecular weight anionic polyelectrolytes using metal salts. The formation [...]

Colloidal apatite nanoparticles exhibiting luminescence and magnetic susceptibility

Nickel A., Prakash K.H., Pedulla M., Kumar R., Montana Tech, US

Hydroxyapatite (HA) has been recognized for some time as a potential candidate for engineering hard-tissue replacements and drug and gene delivery systems. However, the inability to collidally disperse nano-HA (nHA), and perhaps create primary nHA [...]

Antibacterial activity of flame-made Ag/SiO2 nanoparticles

Sotiriou G.A., Camenzind A., Meyer A., Panke S., Pratsinis S.E., ETH Zürich, CH

The synthesis of flame made Ag/SiO2 nanoparticles was achieved by flame spray pyrolysis. The precursor selection influence on the final product was studied. The produced powders were characterized by TEM/STEM, XRD, BET, UV/vis. Additionally, the [...]