Sensitive sensors based on nanoparticles are created in MSU
Researchers from the Moscow State University (MSU) and the Southern Federal University (SFedU) have improved the detection technology of substances weak concentration with the help of silver and gold nanoparticles. The technology allows to detect chlorine content in solutions contaminated with other compounds.
Scientists have suggested a methodology for combining of the use of paper strip-testers with nanoparticles and substance extraction with the use of liquid gas.
The MSU press service told that nanoparticles of silver and gold are already used in optical sensors to detect weak concentrations. Existing methods have the selective issues. Because of an aggregative instability, colliding nanoparticles can stick together.
«The problem may be solved by attaching nanoparticles to solid substrates. The number of matrix materials for sensors is quite limited, so scientists have wondered how it is possible to modify the surface of sensor matrices» the press service explained.
Testing showed that the sensor can detect the chlorine weak concentrations in the other compounds of test samples. In this case, researchers do not need to do any preliminary work with the samples.
Scientists from the Rostov State Medical University and the Institute of Chemical Reagents and High Purity Chemical Substances of National Research Centre «Kurchatov Institute» have also took part in the research. The results are published in Talanta.
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