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A disposable cyclic voltammetry (CV) tag is printed on a plastic film by integrating wireless power transmitter, polarized triangle wave generator, electrochemical cell and signage through a scalable gravure printing method. By proximity of 13.56 MHz RF reader, the printed CV tag generates 320 mHz of triangular sweep wave from +500 mV to −500 mV which enable to scan a printed electrochemical cell in the CV tag. By simply dropping any specimen solution on the electrochemical cell in the CV tag, the presence of solutes in the solution can be detected and shown on the signage of the CV tag in five sec. 10 mM of N,N,N′,N′-tetramethyl-p-phenylenediamine (TMPD) was used as a standard solute to prove the working concept of fully printed disposable wireless CV tag. Within five seconds, we can wirelessly diagnose the presence of TMPD in the solution using the CV tag in the proximity of the 13.56 MHz RF reader. This fully printed and wirelessly operated flexible CV tag is the first of its kind and marks the path for the utilization of inexpensive and disposable wireless electrochemical sensor systems for initial diagnose hazardous chemicals and biological molecules to improve public hygiene and health.

R2R gravure with two printing units with the overlay printing registration accuracy of ±20 μm is introduced to fabricate 20 × 20 TFTs backplane on 150 m of PET web. The resultants of fully printed TFT backplanes were characterized based on the concept to extract the scalability for manufacturing wall paper like sensor sheets. In this gravure system, silver nanoparticle based conductive ink, BaTiO 3 based dielectric ink and single walled carbon nanotube based semiconducting ink were used for printing 20 × 20 TFT backplanes on 100 m of PET web. Rheological properties were optimized with the consideration of printing reliability and electrical properties of resulting TFTs. Mobility, transconductance, threshold voltage, and on-off current ratio of 20 × 20 printed TFT backplanes were analyzed for extracting the parameters to define the scalability factors for practical applications.

For the first time, fully gravure printed wireless cyclic voltammetry (CV) tag is reported as a platform for the disposable wireless sensor tags by utilizing Ag nano-particle based conducting ink, BaTiO 3 nano-particle based dielectric ink and single-walled carbon nanotube based semiconducting ink. The printed CV tag contains four functional units for the disposable wireless sensor tag: the rectenna to generate polarized DC volt through coupled 13.56 MHz AC, triangle wave generator to scan electrochemical cell by ±500 mV at lower frequency (< 500 mHz), amplifier to enhance the output signal and signage to indicate detected level of specimens. Those printed four units will be used as a platform to further develop disposable wireless sensor tags by simply replacing sensor unit.