Newly developed tiny antennas, likened to spotlights on the nanoscale, offer the potential to measure food safety, identify pollutants in the air and even quickly diagnose and treat cancer, according to the Australian scientists who created them. The new antennas are cubic in shape. They do ... 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
Dengue fever, an infectious tropical disease caused by a mosquito-borne virus, afflicts millions of people each year, causing fever, headache, muscle and joint pains and a characteristic skin rash. In some people the disease progresses to a severe, often fatal, form known as dengue hemorrha ... more
Most people know about ultrasound through its role in prenatal imaging: those grainy, grey outlines of junior constructed from reflected sound waves. A new technology called an "acoustic diode," envisioned by researchers in China's Nanjing University, may dramatically improve future ultraso ... 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
A collaboration between the Advanced Photon Source and Center for Nanoscale Materials at U.S. Department of Energy’s (DOE) Argonne National Laboratory has "seen" the crystallization of nanoparticles in unprecedented detail. “Nanoscience is a hot issue right now, and people are trying to c ... more
- 1Schleicher & Schuell has been purchased by Whatman plc
- 2Mummified bodies reveal how tuberculosis ravaged the heart of 18th century Europe
- 3Rapid and efficient DNA chip technology for testing 14 major types of food borne pathogens
- 4Philips enters into collaboration with Janssen to develop new handheld blood test
- 5Goodbye to sunburn thanks to Queen's sunburn indicator
- 6Sharper nanoscopy
- 7Pall Corporation Acquires BioSMB Technology from Tarpon Biosystems
- 8Mettler-Toledo's TDL Analyzers Receive Award from Frost & Sullivan for Competitive Strategy Innovation & Leadership
- 9Bio-marker set forms the basis for new blood test to detect colorectal cancer
- 10Picturing peanut contamination with near infrared hyperspectral imaging
- X-ray laser reveals structure of blood pressure regulator
- Agilent Technologies and Scion Instruments Agree to Enable Each Other’s Instruments in Their Chromatography Data Systems
- Three wavelengths will do
- New tabletop detector 'sees' single electrons
- Roche strengthens oncology translational research pipeline by acquiring CAPP Medical