Platinum electrode modification: Unique surface carbonization approach to improve performance and sensitivity.

摘要: Many microfluidic devices, also known as lab-on-a-chip employ electrochemical detection methods using microelectrodes. Miniaturizing electrodes inevitably reduces electrode sensitivity and decreases the S/N, which limits applications within devices. However, microelectrode surface modification can increase area sensitivity. In present work, we report substantial improvement in platinum performance by coating with carbon from red blood cells. The larger goal of this work was to measure DC electrical resistances cell suspensions a microchannel for hematocrit determination. It observed that current responses were measured, (reproducibility S/N) improved time. electrocatalytic activity measurements 140%. Systematic experimentation revealed cells adsorb carbonize surfaces. surfaces before after improvements analyzed field emission scanning electron microscopy, energy dispersive spectrometry, Raman spectrometry. formed layers on found be proteomic increased porous three-dimensional structure, thus improving stabilizing currents.