Protonated methane, a.k.a. CH5+, is a highly unusual molecule that scientists and astronomers suspect may be found within the interstellar medium where stars and planets are formed. To identify molecules on Earth or in outer space, scientists typically record the spectrum of light absorbed ... more
Elemental and magnetic imaging using X-rays and a microscope
A team of researchers has developed a new microscope that can image the elemental and magnetic properties of a wide range of energy-important materials that are used in devices such as solar cells and solid-state lighting.
The imager is based on a technique known as X-ray excited luminescence microscopy (XELM). It was created by hitching a standard optical microscope to a synchrotron X-ray source. Synchrotrons produce X-rays and other forms of electromagnetic radiation by sending electrons on a curved path at nearly the speed of light.
When the X-rays strike the material being imaged, some of them are absorbed, which causes the sample to luminesce. The microscope portion of the imager is able to detect differences in this luminescence, which is directly related to both the elements in the sample and their magnetic properties. This technique combines the spatial resolution of optical microscopy with the element and magnetic specificity and precision of synchrotron radiation.
It is able to spatially resolve features as small as one micron. However, this value was degraded in practice due to vibrations or subtle shifting of the systems used to direct the X-ray beam, though future refinements should alleviate any stability issues.
XELM has some advantages over other techniques in that it is especially useful at low temperatures and can image in the presence of electric and magnetic fields. The results were accepted for publication in the American Institute of Physics' journal Review of Scientific Instruments.
R.A. Rosenberg et al.; Elemental and magnetic sensitive imaging using x-ray excited luminescence microscopy; Review of Scientific Instruments
Biopsies are a gold standard for definitively diagnosing diseases like cancer. Usually, doctors can only take two-dimensional snapshots of the tissue, and they're limited in their ability to measure the protein levels that might better explain a diagnosis. But now, researchers have develope ... more
Scientists working at Loughborough University, UK, and the University of Cordoba, Spain, have developed a new method for the rapid diagnosis of poisoning in apparently drunk patients. The saliva-based test offers the potential to screen for poisons commonly associated with the cheap or imit ... more
Fat free ice cream, for all its healthy merits, melts the wrong way. Two seconds on the tongue and it's a slush of milk, flavoring and water instead of the rich glob of slowly melting cream we grew to love as kids. When it comes to taste memories, fats are forever. Now X-ray science is cont ... more
Cast iron can be modified through the manufacturing process to optimize its mechanical and physical properties, such as strength and durability. But the manufacturing process is as much art as science, producing good results yet not capturing cast iron's full potential. Controversy still ex ... more
The overuse of nitrogen fertilizers in agriculture can wreak havoc on waterways, health and the environment. An international team of scientists aims to lessen the reliance on these fertilizers by helping beans and similar plants boost their nitrogen production, even in areas with tradition ... more
- 1analytica 2016: Record number of exhibitors thanks to 6.5 percent increase
- 2Schleicher & Schuell has been purchased by Whatman plc
- 3analytica 2016: Key platform for upcoming scientists
- 4SCHOTT Is Now a Stock Corporation
- 5Eurofins reinforces its environment testing footprint with the acquisition of EAC Corp. in Japan
- 6Electronic device detects molecules linked to cancer, Alzheimer's and Parkinson's
- 7Laboratory of the future at analytica in Munich in the present
- 8Beijing Higher Court rules in favor of Merck Millipore in patent infringement case
- 9Mercury in fish affected by both prey type and quality
- 10Device may provide rapid diagnosis of bacterial infections
- Scientists uncover potential trigger to kill cancer
- New discovery from the molecular machinery for depression and addiction
- Tasty fat: X-rays finding the blueprint of why fat is yummy
- Imaging study shows promising results for patients with schizophrenia
- Blood test supports use of potential new treatment for patients with stomach ...
- Thermo Fisher Scientific to acquire FEI Company
- Beating the limits of the light microscope, one photon at a time
- UT Southwestern researchers determine 3-D atomic structure of cholesterol transporter
- Genes linked to the effects of mood and stress on longevity identified
- PET imaging with special tracer can detect and diagnose early Alzheimer's disease