Porous phosphate heterostructures containing CdS quantum dots: assembly, characterization and photoluminescence

• Tipo: Artigo em Revista Científica Internacional
• Data: 2010

Autores

Manuel Algarra (Autor) Outra; Iulius Bobos (Autor) FCUP; Jose Jimenez Jimenez (Autor) Outra; Ramon Morento Tost (Autor) Outra; Enrique Rodriguez Castellon (Autor) Outra; Joaquim C G E Esteves da Silva (Autor) FCUP

Revista

Título: Journal of Inclusion Phenomena and Molecular Recognition in Chemistry

Vol. 67

Páginas: 225-232

ISSN: 0923-0750

Editora: Kluwer Academic Publishers

Indexação

ISI Web of Knowledge - 4 Citações

Scopus - 4 Citações

Classificação Científica

FOS: Ciências exactas e naturais > Química

Outras Informações

ID Authenticus: P-003-6AP

DOI: 10.1007/s10847-009-9703-x

Abstract (EN): The synthesis and characterization of cadmium sulphide (CdS) quantum dots, conjugated in a porous phosphate heterostructure functionalized with aminopropyl groups is described. The resulting material has fluorescence properties with maximum emission intensity at 575 nm. The fluorescent materials are not soluble in water and exhibit high stability in aqueous solution in the pH ranges from 2 to 9. Energy dispersive X-ray spectroscopy confirmed the qualitative elemental composition of the synthesized materials and X-ray photoelectron spectra showed a surface S/Cd atomic ratio of 1.09. SEM images show that the materials are amorphous, possessing porous with sizes of several tens nanometres, homogeneous and exhibit a layered morphology. The adsorption-desorption analysis by N(2) at 77 K showed the accessibility of the CdS quantum dots onto the pores of the structure. The CdS quantum dots were stabilized by mercaptopropionic acid and bounded to the host materials by amine groups.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 8