The enantiomer-specific light-matter interaction is used directly for ionization, so that a separation of substance mixtures is no longer required. Hereby, circularly polarized femtosecond laser pulses are applied whose central wavelength is in the range of 200 nm to 1100 nm and whose bandwidth is very large. In the limit of a very broad white-light continuum, the fs laser pulse intrinsically contains the wavelengths which are suitable for the respective molecule. The chemical sample to be analyzed is ionized by means of this broad-band laser radiation and analyzed by mass spectrometry immediately afterwards. The chemical substance to be analyzed can be a single chemical substance or a mixture of several chemical substances, respectively, wherein any substance contained in the sample can be enantiomerically pure, or present in the form of an enantiomeric mixture.<p> The femtosecond laser pulse used in the device and the method according to the present invention ensures the intensity which is required for the ionization and fragmentation of the substances to be analyzed. During irradiation with the femtosecond laser pulse, it is constantly switching between RCPL and LPCL. i.e. between right-circularly and left-circularly polarized light, and the respective ion yield is measured.<p>
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Dosing system of bulk material (granulates) for expansion injection molding
19.01.2017 | TechnologieAllianz e.V.
Efficient method for Chain Multiplication of unsaturated fatty acids - synthesis of ultra long-chain compounds
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For the first time ever, a cloud of ultra-cold atoms has been successfully created in space on board of a sounding rocket. The MAIUS mission demonstrates that quantum optical sensors can be operated even in harsh environments like space – a prerequi-site for finding answers to the most challenging questions of fundamental physics and an important innovation driver for everyday applications.
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Researchers from the University of Hamburg in Germany, in collaboration with colleagues from the University of Aarhus in Denmark, have synthesized a new superconducting material by growing a few layers of an antiferromagnetic transition-metal chalcogenide on a bismuth-based topological insulator, both being non-superconducting materials.
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Laser-driving of semimetals allows creating novel quasiparticle states within condensed matter systems and switching between different states on ultrafast time scales
Studying properties of fundamental particles in condensed matter systems is a promising approach to quantum field theory. Quasiparticles offer the opportunity...
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