| 초록 |
We present potentiometric performances of ion-to-electron transducer based on reduced graphene oxide (RGO) for application of all-solid-state potassium ion sensors. A large surface area and pore structure of RGO are obtained by a hydrothermal self-assembly of graphene oxide. The electrochemical characterization of RGO solid contact at the interface of ion selective membrane (ISM) and gold electrode shows that the potassium ion selective electrode based on RGO had a high sensitivity (53.34 mV/log[K+]), a low detection limit (‒4.24 log[K+], 0.06 mM) a good potential stability, and a high resistance to light and gas interferences. The potentiometric K+-sensor device was fabricated by combining of screen printed electrodes and a printed circuit board. The K+-sensor device accurately measure the ion concentration of real samples of commercial sports drinks, coke and orange juice, and then transfer the collected data to a mobile application through a Bluetooth module. |
