We present the first demonstration of a fully-flexible, self-powered glucose indicator system that synergizes two flexible electronic technologies: a flexible self-powering unit in the form of a biofuel cell, with a flexible electronic device - a circuit-board decal fabricated with biocompatible microbial nanocellulose. Our proof-of-concept device, comprising an enzymatic glucose fuel cell, glucose sensor and a LED indicator, does not require additional electronic equipment for detection or verification; and the entire structure collapses into a microns-thin, self-adhering, single-centimeter-square decal, weighing less than 40 mg. The flexible glucose indicator system continuously operates a light emitting diode (LED) through a capacitive charge/discharge cycle, which is directly correlated to the glucose concentration. Our indicator was shown to operate at high sensitivity within a linear glucose concentration range of 1 mM-45 mM glucose continuously, achieving a 1.8 VDC output from a flexible indicator system that deliver sufficient power to drive an LED circuit. Importantly, the results presented provide a basis upon which further development of indicator systems with biocompatible diffusing polymers to act as buffering diffusion barriers, thereby allowing them to be potentially useful for low-cost, direct-line-of-sight applications in medicine, husbandry, agriculture, and the food and beverage industries.
Original Publication Citation
Yuen, J. D., Baingane, A., Hasan, Q., Shriver-Lake, L. C., Walper, S. A., Zabetakis, D., . . . Slaughter, G. (2019). A fully-flexible solution-processed autonomous glucose indicator. Scientific Reports, 9(1), 6931. doi:10.1038/s41598-019-43425-x
Yuen, Jonathan D.; Baingane, Ankit; Hasan, Qumrul; Shriver-Lake, Lisa C.; Walper, Scott A.; Zabetakis, Daniel; Breger, Joyce C.; Stenger, David A.; and Slaughter, Gymama, "A Fully-Flexible Solution-Processed Autonomous Glucose Indicator" (2019). Bioelectrics Publications. 269.