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Rare Earth-based colloidal luminescent nanoparticles: fundamental studies at the single particle scale and applications as biolabels

Grant number: 14/22930-2
Support type:Scholarships abroad - Research Internship - Post-doctor
Effective date (Start): February 10, 2015
Effective date (End): February 05, 2016
Field of knowledge:Physical Sciences and Mathematics - Chemistry - Inorganic Chemistry
Principal Investigator:Osvaldo Antonio Serra
Grantee:Paulo Cesar de Sousa Filho
Supervisor abroad: Thierry Gacoin
Home Institution: Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto (FFCLRP). Universidade de São Paulo (USP). Ribeirão Preto , SP, Brazil
Local de pesquisa : École Polytechnique, France  
Associated to the scholarship:13/01669-1 - Nanostructured phosphors and core@shell systems containing rare earths: applications in biological labeling, lighting, and visualization, BP.PD


Rare earth-based compounds are well known for being used in several application fields, with a notorious importance in the elaboration of luminescent materials. Particularly, luminescent inorganic nanoparticles containing rare earths are highly promising systems for the development of new technologies in illumination and visualisation devices, as well as in biological labelling. In this sense, the improvement and the accurate elucidation of the mechanisms involved in the colloidal synthesis methodologies are primordial for the adaptation of the structural and morphological properties of the nanoparticles to the restrictions imposed by each particular application. In addition, a more precise comprehension of the determinant characteristics of the nanoparticles can be accessed through investigations at the single particle level, in order to describe the effect of parameters such as particle sizes, crystallinity, surface state, and dielectric environment on the observed spectroscopic properties. Therefore, the present research project aims to study the methodologies and mechanisms of colloidal synthesis of rare earth phosphate, vanadate and fluoride nanoparticles and core@shell structures for further investigations at the single particle level. For this, we intend to apply confocal microscopy techniques, besides the use and adaptation of plasmonic optical tweezers for the trapping of the particles in controlled dielectric environments and the study of their interactions with other nanostructured systems. Finally, we also intent to apply the selected nanostructures and methodologies of single particle studies for the detection of oxidizing agents in biologic systems, with the actual evaluation of their activity as luminescent biosensors in cellular media. (AU)

Scientific publications (6)
(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)
DE SOUSA FILHO, PAULO C.; LARQUET, ERIC; DRAGOE, DIANA; SERRA, OSVALDO A.; GACOIN, THIERRY. Lanthanoid-Doped Phosphate/Vanadate Mixed Hollow Particles as Ratiometric Luminescent Sensors. ACS APPLIED MATERIALS & INTERFACES, v. 9, n. 2, p. 1635-1644, JAN 18 2017. Web of Science Citations: 13.
BARBOSA, ISALTINO A.; DE SOUSA FILHO, PAULO C.; DA SILVA, DOUGLAS L.; ZANARDI, FABRICIO B.; ZANATTA, LUCAS D.; DE OLIVEIRA, ADILSON J. A.; SERRA, OSVALDO A.; IAMAMOTO, YASSUKO. Metalloporphyrins immobilized in Fe3O4@SiO2 mesoporous submicrospheres: Reusable biomimetic catalysts for hydrocarbon oxidation. Journal of Colloid and Interface Science, v. 469, p. 296-309, MAY 1 2016. Web of Science Citations: 17.
LIMA, JULIANA F.; DE SOUSA FILHO, PAULO C.; SERRA, OSVALDO A. Single crystalline rhabdophane-type CePO4 nanoparticles as efficient UV filters. CERAMICS INTERNATIONAL, v. 42, n. 6, p. 7422-7431, MAY 1 2016. Web of Science Citations: 9.
NASCIMENTO, L. F.; LIMA, J. F.; DE SOUSA FILHO, P. C.; SERRA, O. A. Control of diesel particulate emission based on Ag/CeOx/FeOy catalysts supported on cordierite. CHEMICAL ENGINEERING JOURNAL, v. 290, p. 454-464, APR 15 2016. Web of Science Citations: 12.
DE SOUSA FILHO, PAULO C.; LIMA, JULIANA F.; SERRA, OSVALDO A. From Lighting to Photoprotection: Fundamentals and Applications of Rare Earth Materials. Journal of the Brazilian Chemical Society, v. 26, n. 12, p. 2471-2495, DEC 2015. Web of Science Citations: 16.
DE SOUSA FILHO, PAULO C.; GACOIN, THIERRY; BOILOT, JEAN-PIERRE; WALTON, RICHARD I.; SERRA, OSVALDO A. Synthesis and Luminescent Properties of REVO4-REPO4 (RE = Y, Eu, Gd, Er, Tm, or Yb) Heteronanostructures: A Promising Class of Phosphors for Excitation from NIR to VUV. Journal of Physical Chemistry C, v. 119, n. 42, p. 24062-24074, OCT 22 2015. Web of Science Citations: 26.

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