期刊
ELECTROCHEMISTRY COMMUNICATIONS
卷 83, 期 -, 页码 1-5出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.elecom.2017.08.010
关键词
Nanoparticle; Titanium phosphate; Metal incorporation; Multiplexing; Biosensing
资金
- Asturias Regional Government [FC-15-GRUPIN-021]
- Spanish Ministry of Economy and Competitiveness (MEC) [CTQ2014-58826-R]
In this work, titanium phosphate nanoparticles were modified with different electroactive metals ( cadmium, bismuth, copper, silver and mercury), by a cation-exchange reaction. The amount of metal introduced into the nanoparticles depended strongly on the counter-ion used during the exchange reaction and the type of metal. Nanoparticles with a high metallic load could be generated. The electrolytic medium played an important role in the detection of these metal-modified nanoparticles, since the use of acid makes it possible to extract a large part of the introduced metal by reversing the cation-exchange reaction. The application of these nanoparticles in electrochemical detection was evaluated, the nanoparticles modified with copper and mercury proving superior in terms of sensitivity and selectivity in multiplex detection. As a proof of concept, these nanoparticles were used as labels in a multiplex electrochemical biosensor for the simultaneous detection of two analytes.
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