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Study, Characterization and Properties of Multifunctional Orthophosphates

Grant number: 13/11144-3
Support type:Scholarships in Brazil - Doctorate
Effective date (Start): September 01, 2013
Effective date (End): August 31, 2016
Field of knowledge:Physical Sciences and Mathematics - Chemistry - Inorganic Chemistry
Principal Investigator:Elson Longo da Silva
Grantee:Thales Rafael Machado
Home Institution: Centro de Ciências Exatas e de Tecnologia (CCET). Universidade Federal de São Carlos (UFSCAR). São Carlos , SP, Brazil
Associated research grant:13/07296-2 - CDMF - Center for the Development of Functional Materials, AP.CEPID


Calcium orthophosphates constitute a materials family often suggested as ideal materials to treat and substitute hard tissues. The most employed structure for these intentions is the hydroxyapatite [Ca10(PO4)6(OH)2, HA] and the tricalcium phosphate [Ca3(PO4)2, B-TCP]. In the last years, exist a great interest to use multifunctional materials in many research fields. In this sense, the calcium orthophosphates are regarded as promising materials, since their structures have some characteristics such as the facility to accept partial and total ionic substitutions, the biocompatibility and biodegradability. All these peculiarities allows the function flexibility for these structures. In this way, the present work aims to explore these peculiarities and to demonstrate the multifunctionality of these systems in three different work lines. The first one consist in the preparation of nanoparticles able to biomimetize the bioapatite nanoparticles present in the dental enamel, throught a exhaustive study of the synthesis parameters in the chemical precipitation methodology. The second line will study systems of hydroxyapatite doped with lanthanide ions with luminescent properties, verifying how different thermal treatments affects the crystallographic and simmetry preferences of these species into the structure. The last line aims to sintesize and to study solid solutions in the ternary system Ca3(PO4)2-Sr3(PO4)2-Cu(PO4)2. In this part of the work, an emphasis will be done on the cromatic and antimicrobial properties of Cu(II) and the influence of Ca(II) and Sr(II) in these properties.

Scientific publications (4)
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
MACHADO, T. R.; LEITE, I. S.; INADA, N. M.; LI, M. S.; DA SILVA, J. S.; ANDRES, J.; BELTRAN-MIR, H.; CORDONCILLO, E.; LONGO, E. Designing biocompatible and multicolor fluorescent hydroxyapatite nanoparticles for cell-imaging applications. MATERIALS TODAY CHEMISTRY, v. 14, DEC 2019. Web of Science Citations: 1.
MACHADO, THALES R.; SCZANCOSKI, JULIO C.; BELTRAN-MIR, HECTOR; LI, MAXIMO S.; ANDRES, JUAN; CORDONCILLO, ELOISA; LEITE, EDSON; LONGO, ELSON. Structural properties and self-activated photoluminescence emissions in hydroxyapatite with distinct particle shapes. CERAMICS INTERNATIONAL, v. 44, n. 1, p. 236-245, JAN 2018. Web of Science Citations: 5.
MACHADO, THALES R.; SCZANCOSKI, JULIO C.; BELTRAN-MIR, HECTOR; NOGUEIRA, ICAMIRA C.; LI, MAXIMO S.; ANDRES, JUAN; CORDONCILLO, ELOISA; LONGO, ELSON. A novel approach to obtain highly intense self-activated photoluminescence emissions in hydroxyapatite nanoparticles. Journal of Solid State Chemistry, v. 249, p. 64-69, MAY 2017. Web of Science Citations: 4.
JOVANI, MARC; DOMINGO, MARIA; MACHADO, THALES R.; LONGO, ELSON; BELTRAN-MIR, HECTOR; CORDONCILLO, ELOISA. Pigments based on Cr and Sb doped TiO2 prepared by microemulsion-mediated solvothermal synthesis for inkjet printing on ceramics. DYES AND PIGMENTS, v. 116, p. 106-113, MAY 2015. Web of Science Citations: 13.

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