Details

Autor(en) / Beteiligte

• Hadžić, B.
• Romčević, N.
• Romčević, M.
• Kuryliszyn-Kudelska, I.
• Dobrowolski, W.
• Trajić, J.
• Timotijević, D.
• Narkiewicz, U.
• Sibera, D.

Titel

Surface optical phonons in ZnO(Co) nanoparticles: Raman study

Ist Teil von

• Journal of alloys and compounds, 2012-11, Vol.540, p.49-56

Ort / Verlag

Kidlington: Elsevier B.V

Erscheinungsjahr

2012

Link zum Volltext

Quelle

Elsevier ScienceDirect Journals Complete

Beschreibungen/Notizen

• ► Zno doped with CoO, two groups of different samples obtained. ► Coexistence of phases ZnCo2O4 and Co3O4 with ZnO registered by Raman spectroscopy. ► Existence of ZnO nanoparticles surface optical phonon. ► Changes of relative intensity ZnO and CoO modes have opposite character. Surface optical phonons (SOP) were observed in the range of 496–572cm−1 on Raman scattering spectra of nanocrystalline samples of ZnO(Co) prepared by use of the microwave assisted hydrothermal synthesis and traditional wet chemistry method followed by calcinations. The phase composition of the samples (ZnO, Co3O4, ZnCo2O4) and the mean crystalline size (14–300nm) were determined using X-ray diffraction measurements. The SOP phonon mode exhibit significant size confinement effect, while the phonons of registered phases exhibit effects connected to phase concentration.