Smartphone-Based NFC Potentiostat for Wireless Electrochemical Sensing

Abstract

Most electrochemical sensing requires affordable, portable and easy-to-use electrochemical devices for use in point-of-care testing and resource-limited settings. This work presents the design and evaluates the analytical performance of a near-field communication (NFC) potentiostat, a flat card-sized electrochemical device containing a microchip for electrical analysis and an NFC antenna for smartphone connection. The NFC interface is a wireless connection between the microchip and smartphone to simplify measuring units and make the potentiostat into a passive operated device, running without a battery. The proposed potentiostat can perform the common electrochemical techniques including cyclic voltammetry and chronoamperometry with a current range and voltage range of ±20 µA and ±0.8 V. The performance of the NFC potentiostat is compared to a commercial benchtop potentiostat using ferricyanide as a standard solution. The results show that the NFC potentiostat is comparable to a commercial benchtop potentiostat for both cyclic voltammetry and chronoamperometry measurements. The application of the proposed potentiostat is demonstrated by measuring ascorbic acid concentration. As described, the NFC potentiostat, which is compatible with a smartphone, is low-cost, small in size and user-friendly. Thus, the device can be developed for on-site measurement to apply in various fields.

A Disposable Electrochemical Biosensor Based on Screen-Printed Carbon Electrodes Modified with Silver Nanowires/HPMC/Chitosan/Urease for the Detection of Mercury (II) in Water

“…Regarding the Randles-Sevcik equation [41], the diffusion coefficient of K 3 [Fe(CN) 6 ] was calculated to be 2.4 × 10 −8 cm 2 /s. A scan rate of 100 mV/s was chosen to perform the experiments in this work.…”

“…Moreover, our sensor is portable and easy-to-use, thus making it suitable for point-of-care (POC) testing as well. In addition, we have started developing our sensor system to be used as a flat-card-sized electrochemical device using near-field communication (NFC) technology that connects it to the antenna of a smartphone, as described in Figure S6 [41].…”

Industrial Buyer Innovation Adoption Model: A Focus on a Smartphone-Based Electrochemical Analytical Device for Toxic Heavy Metal Detection

“…To discuss the findings with the literature, the accuracy and reliability of SEAD are comparable to conventional bulky electrochemical workstations [28][29][30]. Additionally, SEAD is integrated with smartphone communication technologies.…”

“…The development of compact and wireless potentiostats allows connection with smartphones, making commercial technology adoption and market penetration more feasible. Portable potentiostats are simple to use, affordable at under 80 USD [27], and comparable to conventional bulky electrochemical workstations in terms of accuracy and reliability [28][29][30].…”

Smartphone-Operated Wireless Chemical Sensors: A Review

“…K. Krorakai et al recently proposed the design of an NFC potentiostat for a smartphone connection and evaluated its analytical performance. The NFC potentiostat performs well in analytical tests such as cyclic voltammetry and chronoamperometry [56]. The NFC potentiostat (Figure 3c), which is compatible with smartphones, is low-cost, compact, and easy to use.…”