Lanthanoid-Doped Phosphate/Vanadate Mixed Hollow Particles as Ratiometric Luminescent Sensors

Autor(es)

de Sousa Filho, Paulo C. ; Larquet, Eric ; Dragoe, Diana ; Serra, Osvaldo A. ; Gacoin, Thierry

• Tipo de documento: Artigo Científico
• Fonte: ACS APPLIED MATERIALS & INTERFACES; v. 9, n. 2, p. 1635-1644, JAN 18 2017.
• Citações Web of Science: 13

Resumo

Rare earth (RE) phosphates and vanadates are structurally similar compositions that display distinct but complementary luminescent properties. The properties of these phosphors can be combined in REPO4-REVO4 heterostructures during the development of new sensing technologies for biological applications. This work presents the synthesis of hollow RE phosphate/vanadate colloidal particles and evaluates their applicability as luminescent markers. Hydrothermal treatments of RE hydroxycarbonate particles in the presence of the PO43- and VO43- precursors afforded the final REPO4-REVO4 solids in a two-step template synthesis. We converted precursor hydroxycarbonate particles into the final heterostructures and characterized their structure and morphology. According to our detailed study into the spectroscopic properties of Eu3+-doped particles and their luminescence response to several species, the presence of the phosphate and vanadate phases in a single particle provided different chemical environments and enabled the design of a ratiometric approach to detect H2O2. These results open new perspectives for the development of new intracellular luminescent markers. (AU)

• Processo FAPESP: 13/01669-1 - Luminóforos nanoestruturados e sistemas core@shell contendo terras raras: aplicações em marcação biológica, iluminação e visualização
• Beneficiário: Paulo Cesar de Sousa Filho
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 14/22930-2 - Nanopartículas coloidais luminescentes à base de terras raras: estudos fundamentais em escala individual e aplicações como sondas biológicas
• Beneficiário: Paulo Cesar de Sousa Filho
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Pós-Doutorado