Effect of partial preferential orientation and distortions in octahedral clusters on the photoluminescence properties of FeWO4 nanocrystals

Autor(es)

Almeida, M. A. P. ^[1] ; Cavalcante, L. S. ^[2] ; Morilla-Santos, C. ^[3] ; Dalmaschio, C. J. ^[1] ; Rajagopal, S. ^[4] ; Li, M. Siu ^[5] ; Longo, E. ^{[1, 2]}

Afiliação do(s) autor(es)

^[1] Univ Fed Sao Carlos, Dept Chem, LIEC, BR-13565905 Sao Carlos, SP - Brazil

^[2] UNESP, Inst Chem, INCTMN, BR-14800900 Araraquara, SP - Brazil

^[3] MAv DF Univ Estadual, BR-17033360 Bauru, SP - Brazil

^[4] Bharathiar Univ, Dept Phys, Thin Films & Nanomat Lab, Coimbatore 641046, Tamil Nadu - India

^[5] Univ Sao Paulo, IFSC, BR-13560970 Sao Carlos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: CrystEngComm; v. 14, n. 21, p. 7127-7132, 2012.
• Citações Web of Science: 18

Resumo

This communication is a report of our initial research to obtain iron tungstate (FeWO4) nanocrystals by the microwave-hydrothermal method at 170 degrees C for 45 min. X-ray diffraction patterns showed that the FeWO4 nanocrystals prepared with polyethylene glycol-200 have a partial preferential orientation in the (011) plane in relation to other nanocrystals prepared with sodium bis(2-ethylhexyl) sulfosuccinate and water. Rietveld refinement data indicates that all nanocrystals are monophasic with wolframite-type monoclinic structures and exhibit different distortions on octahedral {[}FeO6]/{[}WO6] clusters. High resolution transmission electron microcopy revealed an oriented attachment mechanism for the growth of aggregated FeWO4 nanocrystals. Finally, we observed that the photoluminescence properties of these nanocrystals are affected by partial preferential orientation in the (011) plane and distortions on {[}FeO6]/{[}WO6] clusters. (AU)

• Processo FAPESP: 09/53189-8 - Propriedades fotoluminescentes e fotocataliticas dos tungstatos de ferro e manganes
• Beneficiário: Marcio Aurélio Pinheiro Almeida
• Modalidade de apoio: Bolsas no Brasil - Doutorado