Results 1 to 10 of about 167,325,945 (199)

Turn-on luminescence from molecular rotor realignment in metal-organic framework thin films [PDF]

Nature Communications
Sub-unit motion within metal-organic frameworks (MOFs) offers unique opportunities for nanoscale sensing. However, achieving controlled partial rotation of bulky linkers remains a significant challenge.
Jan C. Fischer, Tong Zhou, Philipp Sievers, Nils W. Rosemann, Elizabeth Coetsee, Dmitry Busko, Yang Li, Honghan Ji, Diethelm Johannsmann, Lingju Guo, Pengfei Duan, Bryce S. Richards, Ian A. Howard, Tonghan Zhao   +13 more
doaj   +2 more sources

Some varieties of quartz at the epithermal silver occurrences of Tas-Kystabyt magmatic belt (Yakutia): textures, IR-spectra, X-ray luminescence

Известия высших учебных заведений: Геология и разведка, 2015
Varieties of quartz at silver occurrence Aid and silver veins of gold-rare metals deposit Ergelyah are studied. New data on the textures of comb quartz and earlier not documented the late coarse-grained quartz is presented; the IR- and X-ray luminescence
O. A. Sustavov
doaj   +3 more sources

Luminescence of copper-doped α-quartz crystal after oxygen treatment [PDF]

Optical Materials: X
Treatment of copper-doped natural α-quartz in oxygen atmosphere at 1200 °C leads to changes in luminescence properties. The luminescence center of AlO4−-Cu+ is modified. The intensity is low in the annealed sample and increases after X-ray irradiation at
A. Trukhin
doaj   +2 more sources

Structural and Optical Characterization of Silica Nanospheres Embedded with Monodisperse CeO₂-Eu³⁺ Nanocrystals

Magnetochemistry, 2022
Luminescent nanocrystals embedded into silica microspheres were shown to be useful for silica labeling for biological applications, ensuring mechanical and chemical stability, nontoxicity, biocompatibility and optical properties.
Corina Secu, Cristina Bartha, Elena Matei, Cristian Radu, Mihail Secu   +4 more
doaj   +1 more source

Radiation modification of quartz and its spectral characteristics [PDF]

E3S Web of Conferences
The nature of the structural phase transition of quartz under neutron irradiation was studied by X-ray diffraction analysis. The kinetics of gamma luminescence (GL) bands in quartz crystals grown on seeds irradiated with neutrons with a dose of 5-1018 ...
Mustafakulov A.
doaj   +1 more source

Quartz veins at the southern part of Adycha-Elgi anticlinorium and zone of Adycha-Taryn fault, Yakutia

Литосфера, 2018
A comparative study of quartz veins occurring among upper Triassic terrigenous rocks in the southern part of Adycha-Elgi anticlinorium and the adjacent site of Adycha-Taryn fault zone.
Oleg A. Sustavov
doaj   +1 more source

Recent high-energy marine events in the sediments of Lagoa de Óbidos and Martinhal (Portugal): recognition, age and likely causes [PDF]

Natural Hazards and Earth System Sciences, 2012
A key issue in coastal hazards research is the need to distinguish sediments deposited by past extreme storms from those of past tsunamis. This study contributes to this aim by investigating patterns of sedimentation associated with extreme coastal flood
P. J. M. Costa, S. A. G. Leroy, J. L. Dinis, A. G. Dawson, S. Kortekaas   +4 more
doaj   +1 more source

The Characterization via X-Ray Luminesce, Thermoluminescence Kinetic Parameters and Structural Analysis of Aventurine a Form of Quartz

Journal of Innovative Science and Engineering (JISE), 2022
In this study, in which the optical and luminescence properties of aventurine, a silicate-based mineral, were examined, the crystal structure of the mineral was examined by XRD analysis, its rheological properties and the elements it contained were determined by SEM-EDX analysis, and its structural properties were examined by FT-IR analysis.
openaire   +1 more source

Mineralogy and microstructure of roofing slate: thermo-optical behaviour and fissility

Materiales de Construccion, 1998
The mineralogy and microstructure, which affect the slaty cleavage, are linked with the strong preferred orientation of phyllosilicates and this enables the rock to be split into large, thin, flat sheets.
J. García-Guinea, M. Lombardero, B. Roberts, J. Taboada, A. Peto   +4 more
doaj   +1 more source

Luminescence and Structure of ZnO Grown by Physical Vapor Deposition

Advances in Materials Science and Engineering, 2012
Nanostructured ZnO was deposited on different substrates (Si, SiO2, and Au/SiO2) by an enhanced physical vapor deposition technique that presents excellent luminescent properties.
R. García-Gutiérrez, M. Barboza-Flores, D. Berman-Mendoza, R. Rangel-Segura, O. E. Contreras-López   +4 more
doaj   +1 more source