Non-trivial role of surrounding gases in triboluminescence: A comprehensive review

Résumé fourni par la source

Research on triboluminescence phenomena has been comprehensively reviewed, focusing on the activation mechanisms resulting from the dissipation of mechanical energy at interfaces. The complexity and interdisciplinary nature of this phenomenon, along with its dependence on gas composition and pressure, have been analyzed. Special attention was paid to air, inert gases, polyatomic gases, and hydrocarbon gases. The influence of gas composition on triboluminescence is not straightforward. This is because there are at least three components associated with different physical and chemical processes and activation mechanisms. These components include: TL1 - Gas discharge luminescence. This occurs due to the generation of an electric field and dielectric breakdown of gases surrounding the mechanically activated zone of the material. TL2 - Photoluminescence of mechanically activated material. This results from excitation of luminescent centers by absorbing ultraviolet radiation from the gas discharge. TL3 – Material luminescence not related with photoluminescent. This is the least studied and most complex component. It can be related to the direct coupling of mechanical force with the energy landscape of defects, impurities, and other centers. These centers can be excited and emit light during de-excitation. Other possibilities include luminescence excited by electric fields, exoelectron emission, etc. Therefore, the gas environment is crucial not only for gas discharge (as various gases can promote or quench it) but also for controlling other excitation and de-excitation processes. These processes occur through interactions of adsorbed films with stressed material, tribochemical reactions, photochemical reactions, and so on. Furthermore, the potential application of triboluminescence for sensing gas composition is highlighted.

Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.