Emission of highly excited electronic states of potassium from cryptomelane nanorods

被引：16

作者：

Stelmachowski, P. ^{[1
]}

Legutko, P. ^{[1
]}

Jakubek, T. ^{[1
]}

Indyka, P. ^{[1
]}

Sojka, Z. ^{[1
]}

Holmlid, L. ^{[2
]}

Kotarba, A. ^{[1
]}

机构：

[1] Jagiellonian Univ, Fac Chem, PL-30060 Krakow, Poland

[2] Univ Gothenburg, Dept Chem & Mol Biol, S-41296 Gothenburg, Sweden

来源：

PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2015年 / 17卷 / 39期

关键词：

AMMONIA-SYNTHESIS CATALYST; MANGANESE OXIDE; RYDBERG MATTER; FIELD REVERSAL; K BEAM; OMS-2; SCATTERING; STABILITY; PROMOTER; SURFACE;

D O I：

10.1039/c5cp04108b

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Cryptomelane (KMn8O16) nanorods were synthesized, characterized (XRD, Raman spectroscopy, TEM/SAED) and investigated by species resolved thermal desorption of potassium from the material in the range of 20-620 degrees C. The desorbing fluxes of ions, atoms and highly excited electronic states (field ionizable Rydberg states) were measured using an ion collector, surface ionization and field ionization detectors, respectively, in a vacuum apparatus. The non-equilibrium emission of potassium Rydberg species (principal quantum number > 30) strongly depends on the surface positive voltage bias with a broad maximum at 1-8 V. The stimulation of Rydberg species emission is discussed in terms of spatial and energetic overlapping between the electron cloud above the cryptomelane surface and the desorbing potassium ion.

引用

页码：26289 / 26294

页数：6

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