Počet záznamů: 1  

Rapid thermal synthesis of GaN nanocrystals and nanodisks

  1. 1. 0393052 - UOCHB-X 2014 RIV NL eng J - Článek v odborném periodiku
    Sofer, Z. - Sedmidubský, D. - Huber, Š. - Šimek, P. - Šaněk, F. - Jankovský, O. - Gregorová, E. - Fiala, R. - Matějková, Stanislava - Mikulics, M.
    Rapid thermal synthesis of GaN nanocrystals and nanodisks.
    Journal of Nanoparticle Research. Roč. 15, č. 1 (2013), 1411/1-1411/7 ISSN 1388-0764
    Institucionální podpora: RVO:61388963
    Klíčová slova: gallium nitride * thermal ammonolysis * nanodisks * nanocrystals
    Kód oboru RIV: CF - Fyzikální chemie a teoretická chemie
    Impakt faktor: 2.278, rok: 2013

    Gallium nitride materials are at the forefront of nanoelectronic research due to their importance for UV optoelectronics. In this contribution, we present a facile and well-controlled synthesis of GaN nanodisks by rapid thermal ammonolysis of complex gallium fluoride precursor. We observed the formation of GaN nanodisks in 150 s at 800 degrees C. The structural properties of GaN were investigated by X-ray diffraction, Raman spectroscopy, and micro-photoluminescence. The morphology of GaN was investigated by scanning electron microscopy and the magnetic properties by superconducting quantum interference device (SQUID) techniques. The morphology of nanodisks was strongly influenced by the temperature of synthesis. The structure characterization shows a high concentration of defects related mainly to the vacancies of N and Ga. The magnetic measurement by SQUID shows paramagnetic behavior induced by structure defects. These findings have a strong implication on the construction of modern optoelectronic nanodevices.
    Trvalý link: http://hdl.handle.net/11104/0221826