TEM – Page 4 – TechConnect Briefs

Strain Driven Growth of Zinc Oxide Nanowires on Sapphire: Controlling Horizontal vs. Standing Growth

Nikoobakht B., Eustis S., National Institute of Standards and Technology, US

Recently we showed large scale fabrication of field-effect transistors from horizontal ZnO nanowires (NWs) on a-plane sapphire. We are interested in understanding the factors that induce the unique growth direction of horizontal ZnO NWs and [...]

Synthesis of Nanocrystalline ZrO2 Powder by the Polyol Route

Vivekanandhan S., Venkateswarlu M., Rawls H.R., Satyanarayana N., Univ. Texas Health Science Center at San Antonio, US

Recently, it was observed that nanostructured zirconium oxide, ZrO2, powder exhibits enhanced performance in many applications. We report the polyol route for the synthesis of nanocrystalline ZrO2 powder, and its characterization by TG/DTA, FTIR, XRD [...]

Exploring the behavior of concentrated collagen, approaches to tailor biomimetic materials

Gobeaux F., Mosser G., Anglo A., Panine P., Davidson P., Giraud-Guille M.-M., Belamie E., Ecole Pratique des Hautes Etudes, FR

Dense ordered collagen matrices can be obtained by fine tuning the electrostatic interactions in highly concentrated solutions of type I collagen. Such biomimetic fibrillar materials have a high application potential in the field of tissue [...]

Grain Size Distribution in CoCrPtO-Based Perpendicular Magnetic Recording Media

Hossein-Babaei F., Kwon U., Sinclair R., Stanford University, US

A multilayer disk structure based on a CoCrPtO magnetic layer is one of the material choices for fabrication of perpendicular magnetic recording media. In these devices, nano-sized (typically ~10 nm in diameter), magnetically hard cobalt-rich [...]

Fabrication of Nanoparticulate Inks for Applications in Printable Electronics

Reindl A., Aldabergenova S., Altin E., Frank G., Peukert W., Friedrich-Alexander University, DE

The main impetus of this work is the fabrication of stable suspensions (in regard to aggregation) suitable for a printing process. Therefore semiconducting nanoparticles were dispersed systematically in organic solvents using a variety of methods [...]

Novel Acrylamide Assisted Polymeric Citrate Route for the Synthesis of Nanocrystalline ZrO2 Powders for Dental Applications

Vivekanandhan S., Venkateswarlu M., Rawls H.R., Satyanarayana N., Pondicherry University, IN

Zirconium oxide has been receiving importance because of its use in wide range of biomedical applications, which is due to its high mechanical strength, fracture toughness and bio-compatibility. Recently, nano structured zirconia powders exhibit enhanced [...]

TEM Studies of Iron Oxide Nanoparticles for Cell Labeling and Magnetic Separation

Koh A.L., Sinclair R., Stanford University, US

One of the application areas for magnetic nanoparticles (MNPs) is in cell labeling and magnetic separation. This process involves tagging MNPs onto desired cells and then separating them from unwanted entities using a sensor which [...]

Image-based Nanocrystallography in Two and Three Dimensions with

Moeck P., Bjorge R., Fraundorf P., Portland State University, US

It is well known that many nanocrystals can not be identified from their powder X-ray diffraction pattern as it is customary for collections of micrometer sized crystals. The crystallographic phase and shape of nanocrystals can, [...]

Advanced CryoTEM and Tomography for Two- and Three-Dimensional Nano-Characterisation of Soft Matter

Sourty E., de Haas F., Frederik P.M., Frederik P.M., Loos J., Stokes D.J., Hubert D.H.W., FEI Company, NL

Recent advances in transmission electron microscopy (TEM) mean that we are able to achieve unprecedented resolution at the atomic level. Furthermore, improved methods for obtaining and reconstructing tilt series projections allow us to create high [...]

Effective Use of Focused Ion Beam (FIB) in Investigating Fundamental Mechanical Properties of Metals at the Nano-Scale

Greer J.R., Nix W.D., Palo Alto Research Center, US

In this work, FIB is utilized in manufacturing of nano-pillars to investigate plasticity of metals at nano-scale. Gold nano-pillars were fabricated from bulk gold and epitaxial gold films on MgO substrates and subsequently compressed using [...]