title: Lanthanoid-Doped Phosphate/Vanadate Mixed Hollow Particles as Ratiometric Luminescent Sensors.
abstract: 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-REVO4heterostructures 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-REVO4solids 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.
authors.affiliation: Rare Earth Laboratory, Department of Chemistry, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, University of São Paulo , Av. Bandeirantes, 3900, Ribeirão Preto, São Paulo 14040-901, Brazil.|Solid State Chemistry Group/Laboratoire de Physique de la Matière Condensée, Ecole Polytechnique , Route de Saclay, 91128 Palaiseau Cedex, France.
authors.forename: Paulo C
authors.identifier: http://orcid.org/0000-0002-9210-4506
authors.initials: PC
authors.lastname: de Sousa Filho
authors.affiliation: Solid State Chemistry Group/Laboratoire de Physique de la Matière Condensée, Ecole Polytechnique , Route de Saclay, 91128 Palaiseau Cedex, France.
authors.forename: Eric
authors.initials: E
authors.lastname: Larquet
authors.affiliation: Institute de Chimie Moleculaire et des Matériaux d'Orsay, Université Paris-Sud-11/Université Paris-Saclay , Rue du Doyen Georges Poitou, 91400 Orsay, France.
authors.forename: Diana
authors.initials: D
authors.lastname: Dragoë
authors.affiliation: Rare Earth Laboratory, Department of Chemistry, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, University of São Paulo , Av. Bandeirantes, 3900, Ribeirão Preto, São Paulo 14040-901, Brazil.
authors.forename: Osvaldo A
authors.initials: OA
authors.lastname: Serra
authors.affiliation: Solid State Chemistry Group/Laboratoire de Physique de la Matière Condensée, Ecole Polytechnique , Route de Saclay, 91128 Palaiseau Cedex, France.
authors.forename: Thierry
authors.identifier: http://orcid.org/0000-0001-6774-3181
authors.initials: T
authors.lastname: Gacoin
keywords: H2O2 detection; luminescence; phosphates; rare earth; vanadates