CdTe QDs functionalized mesoporous silica nanoparticles loaded with conjugated polymers: A facile sensing platform for cupric (II) ion detection in water through FRET

Jie Sha, Cuiyan Tong, Haixia Zhang, Lijuan Feng, Bingxin Liu, Changli Lü

Research output: Contribution to journalArticle

26 Scopus citations

Abstract

This paper reported a facile method for fabricating CdTe quantum dots decorated fluorescent mesoporous silica nanoparticles containing poly(p-phenylenevinylene) by electrostatic interaction in aqueous solution. The resulted fluorescent hybrid nanomaterials showed the dual-emission centered at 500 nm and 717 nm, which can be used as a fluorescent probe to detect Cu 2+ in water through fluorescence resonance energy transfer. Cu 2+ can be captured by the amino groups of the polyethyleneimine to form an absorbent complex, resulting in a strong quenching of red-emission from CdTe quantum dots on the surface of nanoparticles via energy transfer. However, the green-emission of poly(p-phenylenevinylene) remained. Therefore the addition of Cu2+ induced the fluorescent evolution of the nanoprobe from red to green. The nanoprobe provided an efficient platform for the sensing of Cu2+ with a detection limit of 31.2 nM. Compared with pure quantum dots, the nanoprobe can distinguish Cu2+ from Hg2+.

Original languageEnglish (US)
Pages (from-to)102-109
Number of pages8
JournalDyes and Pigments
Volume113
DOIs
StatePublished - Feb 2015

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Process Chemistry and Technology

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