The effect of hydrothermal treatment on the morphologies and optical properties of Upconversion nayf 4:ln 3+ Crystals

Calil Júnior, Marcos Antônio; Melo, Átila A. C.; Rodrigues, Emille M.; Sigoli, Fernando A.; Rodrigues, Marcelo Oliveira

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Título:	The effect of hydrothermal treatment on the morphologies and optical properties of Upconversion nayf 4:ln 3+ Crystals
Autor(es):	Calil Júnior, Marcos Antônio Melo, Átila A. C. Rodrigues, Emille M. Sigoli, Fernando A. Rodrigues, Marcelo Oliveira
Assunto:	Luminescência Cristais
Data de publicação:	Set-2017
Editora:	Sociedade Brasileira de Química
Referência:	CALIL JÚNIOR, Marcos A. et al. The effect of hydrothermal treatment on the morphologies and optical properties of Upconversion nayf 4:ln 3+ Crystals. Journal of the Brazilian Chemical Society, São Paulo, v. 28, n. 9, p. 1816-1821, set. 2017. Disponível em: <http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532017000901816&lng=en&nrm=iso>. Acesso em: 7 fev. 2018. doi: http://dx.doi.org/10.21577/0103-5053.20170068.
Abstract:	This work deals with the synthesis and characterization of upconversion NaYF4:Ln3+ crystals. Co-precipitation and hydrothermal methods were used to synthesize NaYF4:Ln3+ crystals. The experimental procedures were modified to obtain crystals in the cubic (α) phase, hexagonal (β) phase or a mixture between cubic and hexagonal (α/β) phases. Reaction temperature was maintained at 200 °C and the time of hydrothermal treatments were maintained at 24 and 48 h. The average diameter of the crystals ranged from 25 nm to 6.4 µm, depending on the chosen synthetic route. These materials can be applied in areas such as photodynamic therapy and bioimaging.
Unidade Acadêmica:	Instituto de Química (IQ)
Licença:	Journal of the Brazilian Chemical Society - This is an Open Access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0). Fonte: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532017000901816&lng=en&nrm=iso. Acesso em: 7 fev. 2018.
DOI:	http://dx.doi.org/10.21577/0103-5053.20170068
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