Wednesday, August 14, 2013

A novel ascorbic acid sensor based on Fe3+/Fe2+ modulated photoluminescence of CdTe quantum dots@SiO2 nanobeads

Nanoscale , 2013, Accepted Manuscript

DOI: 10.1039/C3NR03060A, Paper

Qiang Ma, Yang Li, Zihan Lin, Guangchao Tang, Xingguang Su

We have developed a novel modulated photoluminescence sensor based on CdTe QDs@silica nanobeads. The PL intensity of CdTe QDs@silica nanobeads were changed significantly when Fe3+ was reduced to Fe2+ by ascorbic acid. When H2O2 was introduced to oxidize Fe2+ to Fe3+, the PL intensity of CdTe QDs@silica nanobeads can be recovered. The sensor can be used to determine ascorbic acid in tablet samples.

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