Electron-Microscopes

Home of the Most Comprehensive Information on Electron-Microscopes.
Electron-Microscopes Resources

Home > Electron Microscopes News > Comparison of TEM specimen preparation of perovskite thin films by tripod polishing and conventional ion milling

Comparison of TEM specimen preparation of perovskite thin films by tripod polishing and conventional ion milling




In this article, the effects of the transmission electron microscopy (TEM) specimen preparation techniques, such as ion milling and tripod polishing on perovskite oxides for high-resolution TEM investigation, are compared. Conventional and liquid nitrogen cooled ion milling induce a new domain orientation in thin films of SrRuO3 and LaFeO3 grown on (001)-oriented SrTiO3 substrates. This is not observed in tripod-polished specimens. Different ion milling rates for thin films and substrates in cross-section specimens lead to artefacts in the interface region, degrading the specimen quality. This is illustrated by SrRuO3 and PbTiO3 thin films grown on (001)-oriented SrTiO3. By applying tripod polishing and gentle low-angle, low-energy ion milling while cooling the sample, the effects from specimen preparation are reduced resulting in higher quality of the TEM study. In the process of making face-to-face cross-section specimens by tripod polishing, it is crucial that the glue layer attaching the slabs of material is very thin (<50 nm).




Click Here to read the entire article...




Other Articles:


Click Here to read the entire article...
Introducing NanoArt Online Competition - A New Art Discipline - AZoNano.com

AZoNano.com

Introducing NanoArt Online Competition - A New Art Discipline
AZoNano.com, Australia - Dec 17, 2008
These structures are visualized with powerful research tools like scanning electron microscopes and atomic force microscopes and their scientific images are ...
Click Here to read the entire article...
Delamination and Electromigration of Film Lines on Polymer Substrate Under Electrical Loading
As the main influencing factors for instability of film lines are widely used in microelectromechanical systems, buckle-driven delamination and electromigration of film lines on polymer substrate under electrical loading are reported in this letter. The critical buckling condition is obtained through Euler formula. In addition, postbuckling analysis for the film is derived to calculate the residual stress distribution. Both electromigration and buckling stress control the film fracture. Film buckling depends not only on the thermal mismatch between the film line and the substrate but also on the applied electrical loading.
Click Here to read the entire article...
Back to mediocrity

The Olympics are over, and everyone is tired, including me. But what a show, and so colorful! Those Chinese sure like red stuff. I've been drawing athletes in action for the last two weeks trying to capture in my imagination the grace and power and agility I saw on the screen. This Weblog is old enough that longtime readers can recall my effusions about the 2004 Olympics, from the August 2004 archive. I felt much more hopeful then than now that I would ever learn anything mathematical and physics-oriented. Currently I am so busy with other work (at the day job, mostly) that I barely get to contemplate a calculus limit, let alone solve limit problems.

I still am a sucker for excellence. I value excellence, or competence, or achievement, more than anything else in the world. I honor it wherever I see it. I watched the TV and Internet coverage knowing that I was being shamelessly manipulated emotionally and mentally, but I didn't care. I was seeing excellence, or at least striving for excellence, even if the girl fell off the beam or the fencer got struck down or the runner lost at the last few meters. At least they tried.

Later in 2004, I forgot all about the Olympics when the Boston Red Sox won their first World Series in 86 years. I thought that was excellent, too. What about art excellence? I constantly visit the sites of commercial artists who work for games and movies and illustrations. There's a lot of this art and I find it thrilling. It's colorful, too, like the Chinese Olympics with their costumes and fireworks. I am a spectator, not a participant. I'm a consumer, not a producer. By the time I get around to having the opportunity to do something myself, it is already 4 in the morning and I should not be up at this hour at all.

Click Here to read the entire article...
Interaction of Single Molecules With Metallic Nanoparticles
We theoretically investigate the interaction between a single molecule and a metallic nanoparticle (MNP). We develop a general quantum mechanical description for the calculation of the enhancement of radiative and nonradiative decay channels for a molecule situated in the near-field regime of the MNP. Using a boundary element method approach, we compute the scattering rates for several nanoparticle shapes. We also introduce an eigenmode expansion and quantization scheme for the surface plasmons, which allows us to analyze the scattering processes in simple physical terms. An intuitive explanation is given for the large quantum yield of quasi-1-D and quasi-2-D nanostructures. Finally, we briefly discuss resonant FÖrster energy transfer in presence of MNPs.
Click Here to read the entire article...
Biologists spy close-up view of poliovirus linked to host cell receptor
Researchers from Purdue and Stony Brook universities have determined the precise atomic-scale structure of the poliovirus attached to key receptor molecules in human host cells and also have taken a vital snapshot of processes leading to infection. (2008-12-09)
Click Here to read the entire article...
Journal of Electron Microscopy - recent issues
- Copyright 2008, Brightsurf.com - version: v1.5 build A