GOLD GUARD RING (FIGURE 2B)

A mask the size of the opening containing the electrolyte was placed onto the glass slide after CNT deposition, followed by Au deposition. This pro­cedure prevents degration of the metal due to the electrolyte contact.

3.4.2 GRAPHITE CELL (FIGURE 2C)

A cell using graphite (graphenium) as the counter electrode was created. The graphite cell counter electrode construction consists of the same steps for deposition of semiconducting CNTs. A PDMS (Slygard 184 Silicone Elastomer, Dow Corning Corp.) plastic mold with a circular depression was created to house pieces of graphite of different heights. A wire is placed through the PDMS at the height of the bottom of the depression. After graphite deposition the PDMS was filled with electrolyte and the ac­tive semiconducting electrode was placed on top of the cell.

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