Previously used doping methods, such as magnetron sputtering and high-energy ion bombardment, create defects in the bulk TiO2 that reduce the photocatalytic efficiency of the material. But directing a low-energy beam of nitrogen atoms at TiO2 deposits nitrogen on the surface only and keeps the material free of defects, says Junguang Tao, a physicist at the Institute of Materials Research & Engineering, in Singapore.
by Journal News and Community | January 13, 2014
The unit maintains proper reaction conditions by controlling its 1,800-W dual magnetrons to optimize the microwave energy delivered to specific sample vessels. Its user interface includes a high-resolution color LED touch screen with speakers, and its One Touch Technology software permits users to select among preinstalled methods to choose those appropriate for specific samples.
by Stu Borman | April 02, 2012
The unit maintains proper reaction conditions by controlling its 1,800-W dual magnetrons to optimize the microwave energy delivered to specific sample vessels. Its user interface includes a high-resolution color LED touch screen with speakers, and its One Touch Technology software permits users to select among preinstalled methods to choose those appropriate for specific samples.
by Stu Borman | April 02, 2012
In particular, Taylor thinks artists are using hand-held microwave magnetrons (I kid you not!) to make modern-day crop circles and he comes up with a pretty convincing argument to back up his sci-fi-sounding theory. Conspiracy theorists may not buy Taylor's logic since it doesn't involve aliens (they've already accused Taylor of being in cahoots with US, UK and German spy agencies).
by Sarah Everts | August 22, 2011
And his theory is that they are using microwaves from magnetrons. Here’s the logic: Exposing plants to microwave radiation causes their knobbly joints to expand, causing the plants to fall over without breaking (an important part of the crop-circle maker’s code of conduct). “Today’s magnetrons are small and light, and some require only 12-V-battery power supplies” to produce microwaves that could quickly knock over great circular swaths of plant matter, Taylor tells Newscripts.
August 22, 2011
One, led by Chang-Beom Eom, a professor of materials science and engineering (MS&E) at the University of Wisconsin, Madison, deposited boron films using radio-frequency magnetron sputtering and then annealed the films at 850 °C in magnesium vapor [Appl. Phys. Lett., 81, 1851 (2002)]. The other team, led by Xiaoxing Xi, associate professor of physics and MS&E at Pennsylvania State University, University Park, grew MgB2 films from diborane (B2H6) and magnesium vapor at temperatures up to 760 °C [Nat.
by RON DAGANI | September 09, 2002