Materials Characterization & Imaging – Page 50

Size Dependence Of Conjugation of Amyloid Beta Protein On Gold Colloidal Nanoparticles’ Surfaces

Sri Hartati D., Tsang W., Briglio N.M., MacCormac J.E., Yokoyama K., The State University of New York at Geneseo, US

Fibrillogenesis of amyloid beta (AB) monomers is a hallmark of Alzheimer’s disease. The initial stage of this process involves intermediates of Abeta aggregates; which have been the focus of many previous fibrillogenesis studies. We discovered [...]

Invertible Polymers for the Stabilization of Nanoparticles

Kohut A., Voronov A., Peukert W., Friedrich-Alexander-University of Erlangen-Nuremberg, DE

A new range of amphiphilic polyesters with both hydrophilic and hydrophobic functionalities alternately distributed in the polymer backbone has been synthesized. These polyesters are soluble in aqueous and organic media, where they reveal inverse behavior [...]

Laser diffraction study of inverse opals

Sinitskii A., Abramova V., Laptinskaya T., Tretyakov Yu., Moscow State University, RU

We discuss the experimental data on laser diffraction in tungsten oxide photonic crystal films with an inverse opal structure. The samples were prepared using deposition of monodisperse polystyrene microspheres onto a vertical glass substrate, infiltration [...]

Structural Analysis of Platinum Paladium Nanoparticles Supported on amorphous Silica by High Resolution Electron Microscopy

Castillo N., Diaz Barriga L., Pérez R., UNAM, MX

Bimetallic nanoparticles structures and properties are distinct from those of pure elemental clusters. Particularly nanoalloy clusters finely dispersed onto high surface area supports, play an important role in heterogeneous catalysis because the performance of a [...]

Predicting the Positive Effects of Combined Metallurgical and Thermo-Mechanical Impacts on the Reliability of Solder Joint Interconnections

Khoshnaw F.M., LU, UK

Generally speaking, solder joints fail due to both fatigue and creep. Therefore both mechanisms are strongly considered by designers and manufacturers as an important design criteria. However, since most designers take parameters individually, their designs [...]

MEMS Reliability Assessment Program – Progress to Date

Zunino III J.L., Skelton D.R., U.S. Army ARDEC, US

Micro-electromechanical systems (MEMS) are a technology that the Army and DOD rely on heavily to achieve their objectives. The MEMS devices within these systems will be required to last the lifetime of the weapon systems [...]

Nano-mechanical testing of Novel bioactive carbon nanotubes/HAP nano particles composite coatings

Singh I., Allan P., Brunel University, UK

Hydroxyapatite (HAP) is an important material for biomedical implants, as its chemical composition is similar to that of bone tissue. Synthetic HAP is a biocompatible prosthetic material, bonding strongly to the bone and promoting the [...]

Application of Abductive Network and FEM to Predict the Stress-Strain Curve with strain hardening effect of Bulk Metals by Nanoindentation test

Yang T.S., Qiu J.Z., Chang S.Y., National Formosa University, TW

Finite element method (FEM) has been widely used for numerical simulation of indentation tests on bulk material in order to analyze its deformation response and investigate the influence of indenter geometry, friction and material elastic [...]

Microstructure and Pile-up effect on Nanoindentation measurements of FCC and BCC Metals

Srivastava A.K., Mirshams R.A., University of North Texas, US

A study of effects of crystal orientation and pile-up on mechanical properties of Fe, Ni and Cu is made.

Analysis of an Ink Ejection Failure on a MEMS Micro-Injector Printing Head

Lee I.Y., Hsu T-P, Tseng F-C, Tang H-K, Lin G-D, BenQ Corporation, TW

In this paper, a stress model is proposed and this model well explains the stress induced failure mechanism of this MEMS micro-injector. An effective solution and optimize design to enhance the robustness of ink chamber [...]