(Invited) Printable Paper-Based Wearable Diaper-Type and Adhesive Bandage-Type Biofuel Cells for Urine Sugar and Sweat Lactate Monitoring

Abstract

Printable Electrochemistry has attracted attention for the development field of a disposable biosensor and biofuel cell. A printable paper-based biofuel cell (PBFC) is useful for energy harvesting power sources in the Internet of Things (IoT) field [1-3]. In addition, PBFC is suitable for an application as a self-powered wearable sensor. In the present study, I introduce two paper-based wearable biofuel cells fabricated by screen-printing technique (Fig. 1). One is used as a self-powered diaper sensor (right side in Fig. 1). The biofuel cell can generate electric power from glucose in urine. The maximum output power increase along with increase of glucose concentration. Thus, we can monitor the glucose concentration by measuring the maximum output power. The paper-based biofuel cell exhibited a maximum power density of 0.7 mW in 100 mM glucose solution. Our group also developed an adhesive bandage-type biofuel cell, which get a power from lactate in sweat (left side in Fig. 1). In the present study, we discuss the characteristics of the wearable biofuel cells in detail. Acknowledgement This work was supported by JST-ASTEP Grant Number AS272S004a.