idw – Informationsdienst Wissenschaft
Nachrichten, Termine, Experten
Nachrichten, Termine, Experten
idw - Informationsdienst
Wissenschaft
Prof. Dr. Stefan Kaskel and his team of scientists at the Institute of Inorganic Chemistry I at TU Dresden discovered in cooperation with the Helmholtz-Centre Berlin (HZB) and French researchers a new phenomenon in the field of gas-solid interactions: the so-called Negative Gas Adsorption (NGA). The renowned scientific journal “Nature” thereon publishes a paper of the participating scientists under the title "A pressure-amplifying framework material with negative gas adsorption transitions".
Adsorption refers to the process by which molecules of a gas collect on the surface of a solid. Metal-organic frameworks are highly porous materials which are widely used for adsorptive applications such as in the reduction of pollutant emissions. The scientists from Dresden, Berlin and France have now succeeded in demonstrating that these materials can dynamically change their structures. During this change of structure, the scientists observed a so far unknown phenomenon: instead of absorbing the gas under pressure increase, the materials released the gas eruptively after reaching a certain threshold. This new phenomenon in the area of gas-solid interactions is therefore called Negative Gas Adsorption (NGA). Normally, materials respond to increased gas pressure by gathering molecules on the outer or inner surface and thus, the gas pressure is buffered and decreases with time. NGA materials can react towards pressure increase by releasing molecules. Hence, the pressure is further amplified. This counterintuitive phenomenon is triggered by solid state phase transitions. Similar to a volcano effect, a small trigger can cause a gas eruption out of this material. Gas pressure amplifying materials represent a new class of solids with potential applications in rescue systems, microengineering and separation applications.
For the full paper, please go to http://www.nature.com/nature/journal/vaop/ncurrent/full/nature17430.html
Contact details for journalists:
Prof. Dr. Stefan Kaskel
Chairperson
Inorganic Chemistry
Technische Universität Dresden
Bergstr. 66
01069 Dresden
Germany
Tel.: +49 (0) 351 463-34885
Fax: +49 (0) 351 463-37287
E-Mail: Stefan.Kaskel@chemie.tu-dresden.de
In situ measurement setup for structural analysis at a synchrotron (Helmholtz Centre Berlin)
TU Dresden, Prof. AC1
None
(network structure): Three-dimensional network structure of the highly porous and flexible material ...
TU Dresden, Prof. AC1
None
Criteria of this press release:
Journalists, Scientists and scholars, Students
Chemistry
transregional, national
Research results, Scientific Publications
English
You can combine search terms with and, or and/or not, e.g. Philo not logy.
You can use brackets to separate combinations from each other, e.g. (Philo not logy) or (Psycho and logy).
Coherent groups of words will be located as complete phrases if you put them into quotation marks, e.g. “Federal Republic of Germany”.
You can also use the advanced search without entering search terms. It will then follow the criteria you have selected (e.g. country or subject area).
If you have not selected any criteria in a given category, the entire category will be searched (e.g. all subject areas or all countries).
