Nuclear magnetic resonance investigation of metallic sodium nanoparticles in porous glass
Autor: | Yu. A. Kumzerov, A. V. Fokin, Jürgen Haase, E. V. Charnaya, D. Yu. Nefedov, A. V. Uskov, Dieter Michel, A. S. Bugaev, E. V. Shevchenko |
---|---|
Rok vydání: | 2016 |
Předmět: |
Materials science
Solid-state physics Sodium Nanoparticle chemistry.chemical_element Knight shift 02 engineering and technology Atmospheric temperature range Porous glass 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Electronic Optical and Magnetic Materials Magnetic field law.invention Nuclear magnetic resonance chemistry law 0103 physical sciences Crystallization 010306 general physics 0210 nano-technology |
Zdroj: | Physics of the Solid State. 58:1234-1238 |
ISSN: | 1090-6460 1063-7834 |
Popis: | Sodium nanoparticles embedded in porous glass have been studied by NMR. The measurements have been carried out on pulse spectrometers in magnetic fields of 9.4 and 17.6 T in a wide temperature range. Changes in the magnitude and temperature dependence of the 23Na Knight shift with respect to those in bulk sodium have been discovered. An additional component of the NMR line shifted to high frequencies has been observed in the temperature range from 240 to 100 K. Investigation of the specific heat has revealed a considerable decrease in the melting and crystallization temperatures of sodium under nanoconfinement, which were not accompanied by abrupt changes in the Knight shift. |
Databáze: | OpenAIRE |
Externí odkaz: |