Luminescence and optical properties of cerium oxide nanoparticles

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F19%3A00506182" target="_blank" >RIV/68081723:_____/19:00506182 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0925346719302502?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0925346719302502?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.optmat.2019.04.021" target="_blank" >10.1016/j.optmat.2019.04.021</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Luminescence and optical properties of cerium oxide nanoparticles

Popis výsledku v původním jazyce

Cerium oxide (CeO2) nanoparticles present an interesting material for various applications in biotechnology and medicine. The mechanism of CeO2 nanoparticles activity is supposed to be related to the presence both Ce3+ and Ce4+ ions on the surface of the nanocrystal. Due to the Ce3+ ions, the charge deficiency of a crystal is compensated by oxygen vacancies in the lattice. The present work is devoted to study the cerium oxide defects by optical and luminescence spectroscopy methods. The CeO2 nanoparticles was produced by the method of pulsed electron evaporation of ceramic oxide targets with condensation of the vapors in a vacuum. The strong non-equilibrium conditions of this method could lead to higher oxygen non-stoichiometry of cerium oxide. The results of work show the cerium nanocrystal manifests an emission provided by intracenter transitions in the Ce3+ ions, F-0-centers and Ce4+-O2- complexes with charge transfer. The band gap E-g of the CeO2 nanoparticles for direct and indirect transitions was estimated. The cerium oxide was found to demonstrate catalase-mimic activity, as well as differential cytotoxicity in relation to tumor and healthy cell cultures.

Název v anglickém jazyce

Luminescence and optical properties of cerium oxide nanoparticles

Popis výsledku anglicky

Cerium oxide (CeO2) nanoparticles present an interesting material for various applications in biotechnology and medicine. The mechanism of CeO2 nanoparticles activity is supposed to be related to the presence both Ce3+ and Ce4+ ions on the surface of the nanocrystal. Due to the Ce3+ ions, the charge deficiency of a crystal is compensated by oxygen vacancies in the lattice. The present work is devoted to study the cerium oxide defects by optical and luminescence spectroscopy methods. The CeO2 nanoparticles was produced by the method of pulsed electron evaporation of ceramic oxide targets with condensation of the vapors in a vacuum. The strong non-equilibrium conditions of this method could lead to higher oxygen non-stoichiometry of cerium oxide. The results of work show the cerium nanocrystal manifests an emission provided by intracenter transitions in the Ce3+ ions, F-0-centers and Ce4+-O2- complexes with charge transfer. The band gap E-g of the CeO2 nanoparticles for direct and indirect transitions was estimated. The cerium oxide was found to demonstrate catalase-mimic activity, as well as differential cytotoxicity in relation to tumor and healthy cell cultures.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

21002 - Nano-processes (applications on nano-scale); (biomaterials to be 2.9)

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2019

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Optical Materials

ISSN

0925-3467

e-ISSN

—

Svazek periodika

92

Číslo periodika v rámci svazku

JUN

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

7

Strana od-do

136-142

Kód UT WoS článku

000470938900018

EID výsledku v databázi Scopus

2-s2.0-85064160669