A unique device has been designed by the Moscow scientists – specialists of the Institute of General Physics, Russian Academy of Sciences, supported by funding from the Russian Foundation for Basic Research. The device not only helps to discover in a few seconds the minute quantities of narcotics and explosives in the air, but to identify and even count every single molecule of these dangerous substances. For the first time has the man managed to approach the creation of device more sensitive than the dog’s nose, besides, it is impossible to either divert or frighten or distract the device from trace.
As a matter of fact, all known methods – and there are several of them – either need preliminary division of air samples (that decreases significantly the sensitivity, and increases the duration of analysis and complicates the detection process) or determine the structure of a substance by its fragments. If the structure of a compound is complicated, and if this is not the sole substance in the sample (this is a common case), then instrumental inspection methods fail the fulfil the task. The task is beyond their “sense of smell”. That is why specially trained dogs have to be involved as their sense of smell is several times more sensitive than that of a man (which is natural), and even of that of the most complicated devices. However, here occur other problems: for instance, a handful of pepper completely deprives a four-legged “smeller” of an opportunity to spot the required scent. Besides, the dog, like human beings, may be in low spirits, or may have blocked nose, the dog can be diverted or distracted from trace – the criminal world has invented a lot of means. Therefore, the device is needed – an unbiassed, reliable and at the same time highly sensitive and selective one. The Moscow researchers have managed to develop such a device.
The device is based on a completely new principle developed by the Institute of General Physics (Russian Academy of Sciences) jointly with the University of Montana, USA. The essence of the principle is as follows: molecules of the sought substances first “settle” – they are sorbed on a specially processed silicic surface and interact with it. Then the laser beam, figuratively speaking, knocks the molecules off the surface but in a slightly different form. They have become positive ions, which differ from the original molecules by one thing only – a hydrogen ion (proton) is either added to or removed from them.
Sergey Komarov | alfa
Fraunhofer researchers develop measuring system for ZF factory in Saarbrücken
21.11.2017 | Fraunhofer-Institut für Zerstörungsfreie Prüfverfahren IZFP
New manufacturing process for SiC power devices opens market to more competition
14.09.2017 | North Carolina State University
The WHO reports an estimated 429,000 malaria deaths each year. The disease mostly affects tropical and subtropical regions and in particular the African continent. The Fraunhofer Institute for Silicate Research ISC teamed up with the Fraunhofer Institute for Molecular Biology and Applied Ecology IME and the Institute of Tropical Medicine at the University of Tübingen for a new test method to detect malaria parasites in blood. The idea of the research project “NanoFRET” is to develop a highly sensitive and reliable rapid diagnostic test so that patient treatment can begin as early as possible.
Malaria is caused by parasites transmitted by mosquito bite. The most dangerous form of malaria is malaria tropica. Left untreated, it is fatal in most cases....
The formation of stars in distant galaxies is still largely unexplored. For the first time, astron-omers at the University of Geneva have now been able to closely observe a star system six billion light-years away. In doing so, they are confirming earlier simulations made by the University of Zurich. One special effect is made possible by the multiple reflections of images that run through the cosmos like a snake.
Today, astronomers have a pretty accurate idea of how stars were formed in the recent cosmic past. But do these laws also apply to older galaxies? For around a...
Just because someone is smart and well-motivated doesn't mean he or she can learn the visual skills needed to excel at tasks like matching fingerprints, interpreting medical X-rays, keeping track of aircraft on radar displays or forensic face matching.
That is the implication of a new study which shows for the first time that there is a broad range of differences in people's visual ability and that these...
Computer Tomography (CT) is a standard procedure in hospitals, but so far, the technology has not been suitable for imaging extremely small objects. In PNAS, a team from the Technical University of Munich (TUM) describes a Nano-CT device that creates three-dimensional x-ray images at resolutions up to 100 nanometers. The first test application: Together with colleagues from the University of Kassel and Helmholtz-Zentrum Geesthacht the researchers analyzed the locomotory system of a velvet worm.
During a CT analysis, the object under investigation is x-rayed and a detector measures the respective amount of radiation absorbed from various angles....
The quantum world is fragile; error correction codes are needed to protect the information stored in a quantum object from the deteriorating effects of noise. Quantum physicists in Innsbruck have developed a protocol to pass quantum information between differently encoded building blocks of a future quantum computer, such as processors and memories. Scientists may use this protocol in the future to build a data bus for quantum computers. The researchers have published their work in the journal Nature Communications.
Future quantum computers will be able to solve problems where conventional computers fail today. We are still far away from any large-scale implementation,...
15.11.2017 | Event News
15.11.2017 | Event News
30.10.2017 | Event News
22.11.2017 | Business and Finance
22.11.2017 | Physics and Astronomy
22.11.2017 | Physics and Astronomy