Hexagonal boron nitride luminescence dependent on vacuum level and surrounding gases

Autor:	V. Korsaks
Rok vydání:	2015
Předmět:	Materials science Mechanical Engineering Analytical chemistry Hexagonal boron nitride Condensed Matter Physics Grain size Mechanics of Materials General Materials Science Light excitation Vacuum level Oxygen gas Material properties Luminescence Intensity (heat transfer)
Zdroj:	Materials Research Bulletin. 70:976-979
ISSN:	0025-5408
DOI:	10.1016/j.materresbull.2015.06.032
Popis:	Gas sensing properties of hBN powder bulk and nanosize were studied. It was demonstrated that for hBN powders with grain sizes of 70 nm, 1 μm and 5 μm the native defect-induced luminescence observed at 400 nm under 265 nm light excitation and room temperature is sensitive to oxygen gas reducing luminescence intensity. The highest value of luminescence intensity is reached when sample is in vacuum. Results obtained allow conclusion that the hBN powder is prospective for sensing of oxygen gas. Some material properties such as dependence of luminescence intensity on vacuum level and pumping time, ratio of luminescence intensity when sample is in vacuum and gas, its dependence on material grain size were studied.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::bac9b7a07033b579af586b1484b1b711 https://doi.org/10.1016/j.materresbull.2015.06.032 Zobrazit plný text záznamu Full Text from ScienceDirect