by Staff Writers
Moscow, Russia (SPX) Feb 09, 2016
Joint theoretical and experimental study suggested that graphene sheets efficiently shield chemical interactions.
One of the promising applications of this phenomenon is associated with im-proving quality of 2D materials by "de-charging" of charged defect centers on the surface of carbon materials.
Another important feature is the ability to control selectivity and activity of the supported metallic catalysts M/C on the carbon substrate.
Researchers studied carbon materials with defects on the surface (such defects represent an active species, which should be shielded).
Indeed, the experiments demonstrated that the defects areas are quite reactive and, as one may expect, defect sites retain high activity towards various molecules.
However, as soon as the defects were covered with few layers of graphene flakes, the distribution of reactive centers became uniform (without localized reactivity centers typical for de-fect areas).
In other words, covering of the surface defects with graphene layers has decreased the influence of charged defects and made them "invisible" in terms of chemical interactions at the mo-lecular level.
The article Shielding the chemical reactivity using graphene layers for controlling the sur-face properties of carbon materials by Alexandr E. Sedykh, Evgeniy G. Gordeev, Evgeniy O. Pentsak, Valentine P. Ananikov was published in Physical Chemistry Chemical Physics journal (Royal Society of Chemistry).
Institute of Organic Chemistry, Russian Academy of Sciences
Carbon Worlds - where graphite, diamond, amorphous, fullerenes meet
|The content herein, unless otherwise known to be public domain, are Copyright 1995-2017 - Space Media Network. All websites are published in Australia and are solely subject to Australian law and governed by Fair Use principals for news reporting and research purposes. AFP, UPI and IANS news wire stories are copyright Agence France-Presse, United Press International and Indo-Asia News Service. ESA news reports are copyright European Space Agency. All NASA sourced material is public domain. Additional copyrights may apply in whole or part to other bona fide parties. Advertising does not imply endorsement, agreement or approval of any opinions, statements or information provided by Space Media Network on any Web page published or hosted by Space Media Network. Privacy Statement|