Issue 44, 2011
From the journal:

Journal of Materials Chemistry

QD-“Onion”-Multicode silica nanospheres with remarkable stability as pH sensors†

Iván Castelló Serrano,a   Qiang Maab  and  Emilio Palomares*ac  

* Corresponding authors

a Institute of Chemical Research of Catalonia (ICIQ), Avda. Països Catalans, 16, Tarragona, Spain
Fax: +34 977920223
Tel: +34977929241

b Chemistry College, Jinlin University, China

c ICREA, Avda. Lluís Companys, 23, Barcelona, Spain
E-mail: epalomares@iciq.es

Abstract

We present a flexible reverse microemulsion method using hydrophobic QDs for multiplexed encoded nanobeads encapsulating layers of different coloured quantum dots, called QD-“Onion”-Multicode bead (QOM). This novel system has monodisperse, photostable, and excellent luminescence properties that are stable at different pH values. The protection that the silica layers confer to the QDs allows them to be used as a ratiometric pH sensor by measuring the ratio of PL intensity of QDs from the different layers.

Graphical abstract: QD-“Onion”-Multicode silica nanospheres with remarkable stability as pH sensors

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Article information

DOI
https://doi.org/10.1039/C1JM13125G
Article type
Paper
Submitted
06 Jul 2011
Accepted
08 Sep 2011
First published
05 Oct 2011

J. Mater. Chem., 2011,21, 17673-17679

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QD-“Onion”-Multicode silica nanospheres with remarkable stability as pH sensors

I. C. Serrano, Q. Ma and E. Palomares, J. Mater. Chem., 2011, 21, 17673 DOI: 10.1039/C1JM13125G

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