anisotropy – TechConnect Briefs

Facile Spray Coating in Preparing Anisotropic Composites

Song K., Polak R., Abdalla Askar K., Rubner M.F., Cohen R.E., MIT, US

Anisotropy has been taken advantage in composites to achieve specific mechanical, electrical, magnetic and other functional properties. In composite mechanics, orientation of fiber in polymer matrix will reinforce the composites to the greatest potential along [...]

A new route to control the enhancement of structural and anisotropy ordering in two-dimensional particle arrays

Regtmeier A., Wittbracht F., Dück I., Rempel T., Weddemann A., Hütten A., Bielefeld University, DE

For the realization of data storage devices two fundamental requirements are necessary to guarantee good functionality: a) particles need to be arranged within a sizeable, two-dimensional monolayer of high spatial ordering and b) magnetic states [...]

Thermal conductivity enhancement of carbon nanotube composites

Deng F., Zheng Q.-S., Tsinghua University, CN

Simple models for the thermal conductivity enhancements of carbon nanotube (CNT) composites are presented as analytical functions of volume fraction, anisotropic thermal conductivities, aspect ratio, non-straightness, and interfacial thermal resistance of the CNTs. The model [...]

Orientation E®ects of Elastic-Plastic Deformation at Surfaces: Nanoindentation of Nickel Single Crystals

Kum O., Clemson University, US

Orientation effects in nanomechanical properties at the surfaces with molecular dyanmics were observed as a function of indenter size and indenter speed in three crystal orientations: 100, 110, and 111. The force vs displacement curves [...]

Decay of Nanostructures

Hausser F., Voigt A., Research Center Caesar, DE

The thermal relaxation of isolated (single layer) homoepitaxial islands and craters and of isolated nanomounds is simulated using a 2+1 dimensional step flow model. Numerical simulations based on adaptive finite elements are used to study [...]

On 2D/3D Numerical Oxidation Modeling: Calibration and Investigation of Silicon Crystal Orientation Effect on Stresses in Shallow Trench Isolations

Hoffmann T., Dombrowski K.F., Senez V., IEMN-ISEN, UMR CNRS, FR

Shallow trench isolations (STI) process needs careful optimization of thermal annealings in order to minimize leakage currents which may result from excessive mechanical stresses. Due to its intrinsic three-dimensional structure, conventional 2D process simulator is [...]