Cu(I)-based electrodes for glucose monitoring in biofermentation processes

Abstract

In this document, Cu2O, was widely studied due to its amazing electrodeproperties that will be discuss later. It was modified a total of four sensors (SPCE-DropSens), despite that two of them (P25 and HS-1), due to lack of preparationmethod and characterization were not main focus. Nevertheless, NC-9 and NC-10structured crystalline nanocubes were deeply worked on. Electrochemical testswere run in all four sensors.The structured nanocubes previously referred, NC-9 and NC-10, present sizesof 150-200 nm and 200-900 nm, respectively. The size differences is the mainjustification of the following NC-10 results conclusions. It was visible the lixingof NC-10 modified sensor material to the solution, which were probably due tosort of adherent difficulties.Cuprous oxide in cubic nanostructured material, NC-9, shown a sensitivity,which is the main parameter to characterize the sensor yield, of 840μA mM−1cm−2. Comparing this value with others in the literature is a competitive valuedue to the simplicity of the process and the high sensitivity value. Likewise selec-tivity and repeatibility parameters were also consider good to probably proceedto further future work. The electrooxidation reaction of this sensor that spikesthe current signal undergoes in absorption controlled reaction, against the othersthree sensors.NC-10 electrochemical trials were performed, firstly CV test were successfullyran but later trials were no more consider viable due to the lixing phenomenonreferred previously. That is the reason why it was not calculated NC-10 sensitivity.