Layered double hydroxides as carriers for quantum dots@silica nanospheres

Georgiana Stoica*, Iván Castelló Serrano, Albert Figuerola, Irati Ugarte, Roberto Pacios, Emilio Palomares

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

20 Scopus citations

Abstract

Quantum dot-hydrotalcite layered nanoplatforms were successfully prepared following a one-pot synthesis. The process is very fast and a priori delamination of hydrotalcite is not a prerequisite for the intercalation of quantum dots. The novel materials were extensively characterized by X-ray diffraction, thermogravimetry, infrared spectroscopy, transmission electron microscopy, true color fluorescence microscopy, photoluminescence, and nitrogen adsorption. The quantum dot-hydrotalcite nanomaterials display extremely high stability in mimicking physiological media such as saline serum (pH 5.5) and PBS (pH 7.2). Yet, quantum dot release from the solid structure is noted. In order to prevent the leaking of quantum dots we have developed a novel strategy which consists of using tailor made double layered hydrotalcites as protecting shells for quantum dots embedded into silica nanospheres without changing either the materials or the optical properties.

Original languageEnglish (US)
Pages (from-to)5409-5419
Number of pages11
JournalNanoscale
Volume4
Issue number17
DOIs
StatePublished - Sep 7 2012

ASJC Scopus subject areas

  • Materials Science(all)

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