Papers – Page 18 – TechConnect Briefs

Effect of Reaction Temperature on the Structural and Optical Properties of Zno Nanocrystals

Parra-Palomino A., Sotomayor C., Perales-Perez O., Singhal R., Voyles P., Tomar M.S., University of Puerto Rico, PR

The present research addressed the size-controlled synthesis of ZnO nanocrystals at different temperatures. In order to study systematically the dependence of crystal size with synthesis conditions in ethanol, stable suspensions of these nanocrystals were produced [...]

Characterization of CdSe Nanocrystals and their Interaction with Micellar Aggregates by Means of Capillary Electrophoretic Techniques

Oszwaldowski S.O., Vasicek L., Tonev A., Roberts K.P., The University of Tulsa, US

Characterization of nanocrystals is crucial for the development of many chemical methods based on this technology. For this, there are several techniques, mainly microscopic, and recently capillary electrophoretic techniques, that have been proposed. In our [...]

Amorphous-Amorphous Phase Transition in Simulated Amorphous SiO2 Nanoparticle

Hoang V.V., Zung H., Institute of Technology, National University of HochiMinh City, VN

Via Molecular Dynamics simulation we found the transition from low density to high density states in an amorphous SiO2 nanoparticle under compression from 2.20 g/cm3 to 5.35 g/cm3. Simulations were done in a spherical model [...]

Structural Properties of Amorphous Al2O3.2SiO2 nanoparticles

Linh N.N., Hoang V.V., Zung H., Institute of Technology, National Univ. of HochiMinh City., VN

Structural properties of amorphous Al2O3.2SiO2 (AS2) spherical nanoparticles have been studied in a model with different sizes of 2nm, 3nm, 4nm and 5nm under periodic boundary conditions with the Born-Mayer type pair potentials [1,2] via [...]

Prediction Model of Thermal Conductivity for Composite Materials with Nano Particles

Huang C-K, National Taipei University of Technology, TW

In this study, the transport theorem of phonons and electrons is utilized to create a model to predict the thermal conductivity of composite materials with nano particles. By observing or assuming the particle displacement in [...]

Scale up production of nanoparticles using hydrothermal synthesis

Lester E., Poliakoff M., Li J., Guy B., Tinsley N., Blood P., The University of Nottingham, UK

This paper shows how continuous hydrothermal synthesis can be scaled up for commercial scale production using a patented reactor design. There are severe limitations with most nanomaterial manufacturing methods not excluding hydrothermal synthesis. Hydrothermal synthesis [...]

From nanopores to nanoshells: The transformation of MCM-41 into ultrathin wall, hollow silica nanospheres

Ho W.Y., Yeung K.L., Hong Kong University of Science and Technology, HK

This work describes the preparation of ultra-small and ultra-thin hollow silica nanospheres from mesoporous MCM-41. The partially converted MCM-41, which retained the silhouette of the original MCM-41 particle, but is severely riddled with holes from [...]

preparation of Reactive Polymeric Nanoparticles (RPNPs)

Szaloki M., Hartmann J.F., Hegedus C., Borbely J., University of Debrecen, HU

Synthesis of polymeric nanoparticles attracts a great effort to obtain particles with desired size, surface and functionalities. Crosslinking polymerization methods have received considerable interest relation to the development of preparation of microgels, crosslinked nanoparticles, their [...]

Experimental and numerical investigations of the influence of fluid dynamics on the precipitation of nanoscaled particles

Gradl J., Peukert W., Friedrich-Alexander-University of Erlangen-Nuremberg, DE

Precipitation depends on competing kinetics of various interacting parallel and subsequent steps. These are mixing, chemical reactions, nucleation, growth, aggregation and stabilization. The coupling of all subprocesses is the key for predicting the PSD. In [...]

Mesoporous Titanium Dioxide Sphere with Anatase-Type Crystalline Structure using Cyclodextrin as Templates for Nano-sized Pore with Narrow Size Distribution

Chung J.W., Kim H.-J., Kwak S-Y, Seoul National University, KR

Mesoporous titanium dioxide (CD-TiO2) sphere with pore diameter in several nanometers and narrow pore size distribution was prepared from beta-cyclodextrin (beta-CD) and titanium precursor via sol-gel reaction in aqueous acidic condition. beta-CD was used as [...]