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Issue 44, 2011
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QD-“Onion”-Multicode silica nanospheres with remarkable stability as pH sensors

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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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Publication details

The article was received on 06 Jul 2011, accepted on 08 Sep 2011 and first published on 05 Oct 2011


Article type: Paper
DOI: 10.1039/C1JM13125G
Citation: 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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