Navigation Links
York researchers create 'tornados' inside electron microscopes
Date:2/16/2012

Researchers from the University of York are pioneering the development of electron microscopes which will allow scientists to examine a greater variety of materials in new revolutionary ways.

The team, headed by Professor Jun Yuan and Professor Mohamed Babiker, from the University's Department of Physics has created electron beams with orbital angular momentum electron vortex beams which will open the way to many novel applications including the more efficient examining of magnetic materials.

Electron microscopes use a beam of electrons to illuminate a specimen and produce a magnified image, allowing scientists to investigate atomic arrangements. Compared to conventional electron beams, electron vortex beams improve the resolution and sensitivity of imaging, which is key when determining the structure of biological specimens such as proteins. They also have applications in the manipulation of nano-scale objects such as atoms and molecules.

As the electron vortex consists of moving charged particles, there is a magnetic field associated with the vortex. This magnetic field will be invaluable in examining magnetic materials, enabling the nanoscale magnetic structure to be imaged.

The York team has created a design for a holographic mask to generate an electron vortex beam and now plans to use this to improve the imaging capabilities of the electron microscope in its York-JEOL nanocentre.

Details of York's latest work - part of the research by second year PhD student Sophia Lloyd - showing that orbital angular momentum of electron beams with vortex structure are more efficient than light for probing atomic magnetism, are published in the February edition of the Physical Review Letters.

Professor Yuan said: "The introduction of vortex beams into electron microscopy, with its screw-like revolving wave front much like tornados, will revolutionise the study of magnetic nanostructures, as well as creating new applications in terms of nanoparticle manipulation and trapping, and edge contrast detection."

Professor Babiker, an expert in light vortex research, added: "Optical vortex beams, created using beams of light photons, have been studied for the past 20 years. They have found a great many applications, most notably in fine scale manipulation of single molecules and nano-objects in so-called optical tweezers and optical spanners.

"Research being carried out at York is intended to further current understanding of electron vortices so that a similarly broad range of applications can be realised."


'/>"/>
Contact: Caron Lett
caron.lett@york.ac.uk
44-019-043-22029
University of York
Source:Eurekalert

Related biology technology :

1. Self-assembling nanorods: Berkeley Lab researchers obtain 1-, 2- and 3-D nanorod arrays and networks
2. Navy researchers investigate small-scale autonomous planetary explorers
3. Notre Dame researchers develop paint-on solar cells
4. Quantum computing has applications in magnetic imaging, say Pitt researchers
5. Researchers measure nanometer scale temperature
6. Notre Dame researchers demonstrate new DNA detection technique
7. Researchers realize high-power, narrowband terahertz source at room temperature
8. MU researchers identify key plant immune response in fight against bacteria
9. Researchers develop one of the worlds smallest electronic circuits
10. Two Top Biological Imaging Centers Offer Powerful Free Online Tool to Researchers, Educators, and Public
11. Penn and Brown researchers demonstrate earthquake friction effect at the nanoscale
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:12/2/2016)... Texas (PRWEB) , ... December ... ... that it will share findings demonstrating the value of DNA microarray comparative ... at this year’s San Antonio Breast Cancer Symposium. Using molecular test results ...
(Date:12/2/2016)... ... December 01, 2016 , ... The Conference Forum has ... three days and will take place on February 1-3, 2017 at the Roosevelt Hotel ... Gulley (NCI), the program provides a unique 360-degree approach, which addresses the most up-to-date ...
(Date:12/2/2016)... ... December 02, 2016 , ... ... companies dedicated to collaboratively developing improved chemistry, manufacturing and control technologies for ... online UHPLC, with robust, probe-based sampling. , Online liquid chromatography analysis ...
(Date:12/2/2016)... 2016 The immunohistochemistry (IHC) market is ... CAGR of 7.3% during the forecast period of 2016 to 2021 ... segment accounted for the largest share of immunohistochemistry (IHC) market, by ... , , ... (IHC) market spread across 225 pages, profiling 10 companies and supported ...
Breaking Biology Technology:
(Date:6/22/2016)... 2016 On Monday, the Department of Homeland ... share solutions for the Biometric Exit Program. The Request ... Protection (CBP), explains that CBP intends to add biometrics ... the United States , in order to deter ... Logo - http://photos.prnewswire.com/prnh/20160622/382209LOGO ...
(Date:6/9/2016)... , June 9, 2016  Perkotek an innovation leader in attendance control systems ... seamlessly log work hours, for employers to make sure the right employees are actually ... http://photos.prnewswire.com/prnh/20160609/377486LOGO ... ... ...
(Date:6/2/2016)... 2016   The Weather Company , an IBM Business ... industry-first capability in which consumers will be able to interact ... questions via voice or text and receive relevant information about ... Marketers have long sought an advertising solution that can ... personal, relevant and valuable; and can scale across millions of ...
Breaking Biology News(10 mins):