Abstract
An inkjet printed Nafion/MWCNT chip was developed for rapid dopamine determination in undiluted human serum. A well-dispersed Nafion/MWCNT composite ink was investigated with homogeneous double layers which increased the efficiency of dopamine detection, where direct electron exchange was achieved, producing a measurable current change at the underlying sensor electrode. This platform successfully demonstrated direct detection of DA concentrations (0.1μM to 10μM, R=0.999) in real human serum samples using DPV and amperometry methods. This direct measurement of DA in serum samples without pretreatment and dilution is reported for the first time in a Nafion/MWCNT system.
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