nano-sized γ-al2o3 was synthesized successfully by a simple method using al2(so4)3·18h2o as aluminium source and in the presence of polyethylene glycol (peg 2000). ftir spectroscopy, x-ray diffraction (xrd), scanning electron microscope (sem) and transmission electron microscope (tem) were used to characterize the structure and morphology of synthesized powder. the results showed that peg playe...

The electron density difference map, ∆ρ(r)= ρ(r)Cryst ρ(r)IAM, here defined as the difference between the electron density of a crystal, ρ(r)Cryst, and that of the equivalent independent atom model (IAM), ρ(r)IAM, represents one of the quantum mechanical characteristics central for developing fundamental understanding of materials. Convergent beam electron diffraction (CBED) experiments perform...

Nanotechnology has a great influence on modern technology, just like the development of DNA profiling on biotechnology in the past 50 years. Because of applying knowledge and techniques from natural science, forensic science aims to identify, individualize and evaluate evidence. Evidence will then be used to reconstruct crime scenes, guide investigations and bring criminals to justice. Nanotech...

Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) are widely used in material science, metallurgy sicence and life science researches. TEM is an imaging technique where a beam of electrons is focused onto a specimen causing an enlarged version to appear on a fluorescent screen or layer of photographic film. SEM is a technique of electron microscope to produce high re...

Extending the capabilities of electron tomography with advanced imaging techniques and novel data processing methods, can augment the information content in three-dimensional (3D) reconstructions from projections taken in the transmission electron microscope (TEM). In this work we present the application of simultaneous electron energy-loss spectroscopy (EELS) and energy-dispersive X-ray spectr...

Solid-state nanopores have been extensively investigated due to many biological engineering and scientific applications, such as for rapid electrical detection and analysis of biopolymers, powerful DNA detection and genome sequencing technology [1-2]. Herein, we demonstrate that faceted nanopores with various shapes can be successfully fabricated in magnesium via focused electron beam (e-beam) ...

Several studies have been performed to understand the influence of titanium dioxide nanoparticles (TiO2-NPs) on cell function; however the effects of nanoparticle exposure on the plasma membrane have not been addressed so far. Since this interaction may alter cell metabolism and integrity, it is of importance to understand the modifications of the cell membrane, in particular of epithelial cell...

An easy method to synthesize SiOx coated carbon nanotubes (SiOx-CNT) through thermal decomposition of polycarbomethylsilane adsorbed on the surface of CNTs is reported. Physical properties of SiOx-CNT samples depending on various Si contents and synthesis conditions are examined by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), nitrogen isotherm, scanning electron microscope (...

Microstructure changes and micro-damage behavior of some LAB under the impact of ultrasound shock (20 kHz for 5, 10, 15, 20, 25 and 30 minutes) was studied by optical microscope and Transmission Electron Microscope (TEM). Three kinds of micro damages are usually produced by ultrasound, micro-cracks, micro-voids and ruptures.Studies, by TEM showed that ultrasound can increase the cell wall perme...

Stored energy from plastic deformation in rolled aluminum has been quantified with both macroscopic and microscopic methods. Differential scanning calorimetry (DSC) and Microhardness tests were used to determine a value for stored energy based on energy released during recrystallization and resistance to plastic flow from the accumulated dislocation content, respectively. For a value of stored ...