Figure 1 | Scientific Reports

Figure 1

From: Fully printed flexible and disposable wireless cyclic voltammetry tag

Figure 1

(a) Informative illustration of typical CV system and disposable printed CV tag. (b) Schematic circuit diagram of the gravure printed wireless cyclic voltammetry (CV) tags. The circuit was designed to couple AC power from a 13.56 MHz reader and then convert the coupled AC to polarized DC ±10 V ( in Figure 1b). Polarized DC will operate the printed ring oscillator to generate a triangular voltage waveform ( in Figure 1b). The generated waveform will pass through the buffer to meet the impedance difference from the electrochemical cell ( in Figure 1b). The electrochemical cell will run the redox reaction with a single drop of specimen solution ( in Figure 1b) by the voltage triangular waveform. The output current of the electrochemical redox reaction will be amplified via an amplifier circuit ( in Figure b) and the signal will pass through the buffer to meet the impedance difference from the printed signage ( in Figure b). The signage will indicate the concentration level of specimen in the solution ( in Figure b). It will indicate whether the concentration is above or below a pre-determined value.

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