pH and cation lablet sensor Y2 WP1: UOG

The objective of the second year of WP1 of this project is to functionalise lablets with a pH and cation sensor. We have demonstrated last year that the aminoethanethiol can bind to a gold electrode and sense variations in pH. In the past, we have also described the synthesis and demonstrated that the polyoxometalate (POM) [P8W48O184]40- (in the figure this POM is labelled {W48}) can be used as a cation sensor in solution. This year we and collaborators have designed an ISFET chip which, when coated with the POM {W48} can sense variations in concentration of the K+ and NH4+ cations. We are transferring these results to the lablet scale. Indeed, POMs are intrinsically negatively charged, which means that they can easily coat any positively charged layer on a surface. Tests for pH and cation sensitivity will soon be performed on fully operational lablets.


Note. For ease of representation, the scales in this figure have been freely adapted.

Highlight from year two WP2: RUG

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