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28 Current news of Physikalisch-Technische Bundesanstalt
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Graphene and gallium arsenide: Two perfect partners find each other
PTB has for the first time made graphene visible on gallium arsenide - a successful combination of two unique electronic materials
17-Sep-2009
It is the marriage of two top candidates for the electronics of the future, both excentric and extremely interesting: Graphene, one of the partners, is an extremely thin fellow and besides, very young. Not until 2004 was it possible to specifically produce and investigate the single layer of ...
More protection against explosives and nuclear material in freight containers
13-May-2009
Illegally transported, conventional explosives and nuclearly relevant or radioactive ma-terials can enable international terror organizations to transport hazardous materials for attacks to any place in the world. For improved protection against such hazardous freight, scientists of the ...
Magnetic nanoparticles navigate therapeutic genes through the body
PTB measures the pinpointed transport of therapeutics for cardiovascular diseases
09-Mar-2009
Health professionals send genes and healthy cells on their way through the bloodstream so that they can, for example, repair tissue damage to arteries. But do they reach their destination in sufficient quantities? Scientists of the PTB have developed a highly sensitive measuring method with which ...
Spin-polarized electrons on demand
With a single electron pump, PTB researchers provide 'counted' electrons with the desired spin
20-Jan-2009
Many hopes are pinned on spintronics. In the future it could replace electronics, which in the race to produce increasingly rapid computer components, must at sometime reach its limits. Different from electronics, where whole electrons are moved, here it is a matter of manipulating a certain ...
Checking people at airports with terahertz radiation
PTB succeeds in absolute measurement of terahertz radiation
22-Sep-2008
Within the last few years the number of transport checks – above all at airports – has been increased considerably. A worthwhile effort as, after all, it concerns the protection of passengers. Possibilities for new and safe methods of transport checks are offered by terahertz radiation. Before ...
Radioactivity: Discover the lowest amounts with new methods
18-Sep-2008
Detecting ever lower amounts of ionising radiation with ever better methods – scientists have had this goal since the start of the nuclear age. In addition to natural radiation, mankind is exposed to a multitude of other sources of radiation which result from the military and technical use of ...
PTB testing method for finger ring dosemeters has proven its effectiveness
24-Jun-2008
Finger ring dosemeters are used at diverse workplaces having ionizing radiation, e.g. in medicine and industry, in order to check whether the effective dose limt values are adhered to. The dosemeters used to measure beta radiation have been subjected to an annual quality control by the PTB for ...
Optical Atomic Clock: A long look at the captured atoms
On the way to the next generation of atomic clocks
07-Feb-2008
Optical clocks might become the atomic clocks of the future. Their "pendulum", i.e. the regular oscillation process which each clock needs, is an oscillation in the range of the visible light. As its frequency is higher than that of the microwave oscillations of the cesium atomic clocks, ...
