Abstract
We describe the real-time visualization of electrochemiluminescence (ECL) in a microscale region using an interdigitated array electrode (IDA) in a thin layer flow cell. We studied the ECL reaction, which is based on the annihilation of cations and anions of 9,10-diphenylanthracene at the IDA, from the spatial and temporal emission patterns in the thin layer. We observed that the ECL emission region moved from the root of the band array to its center and the emission time was limited when the dye solution was static. We found that two kinds of microscale-width solution stream formed spontaneously and were arranged alternately when the solution was under the laminar flow conditions at a specific flow rate. The two streams were composed of different radical components.
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