Bollella Paolo, Boeva Zhanna, Latonen Rose-Marie, Kano Kenji, Gorton Lo, Bobacka Johan
Laboratory of Molecular Science and Engineering, Faculty of Science and Engineering, Johan Gadolin Process Chemistry Centre, Åbo Akademi University, Biskopsgatan 8, FIN-20500, Turku-Åbo, Finland.
Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Sakyo, Kyoto, 606-8502, Japan.
Biosens Bioelectron. 2021 Mar 15;176:112909. doi: 10.1016/j.bios.2020.112909. Epub 2020 Dec 19.
Herein, we present an alternative approach to obtain a highly sensitive and stable self-powered biosensor that was used to detect D-fructose as proof of concept.In this platform, we perform a two-step process, viz. self-charging the biosupercapacitor for a constant time by using D-fructose as fuel and using the stored charge to realize the detection of D-fructose by performing several polarization curves at different D-fructose concentrations. The proposed BSC shows an instantaneous power density release of 17.6 mW cm and 3.8 mW cm in pulse mode and at constant load, respectively. Moreover, the power density achieved for the self-charging BSC in pulse mode or under constant load allows for an enhancement of the sensitivity of the device up to 10 times (3.82 ± 0.01 mW cm mM, charging time = 70 min) compared to the BSC in continuous operation mode and 100 times compared to the normal enzymatic fuel cell. The platform can potentially be employed as a self-powered biosensor in food or biomedical applications.
在此，我们提出了一种获得高灵敏度和稳定自供电生物传感器的替代方法，该传感器用于检测D-果糖作为概念验证。在这个平台上，我们执行一个两步过程，即通过使用D-果糖作为燃料对生物超级电容器进行恒定时间的自充电，并利用存储的电荷通过在不同D-果糖浓度下进行多次极化曲线来实现对D-果糖的检测。所提出的生物超级电容器在脉冲模式和恒定负载下的瞬时功率密度释放分别为17.6 mW/cm²和3.8 mW/cm²。此外，在脉冲模式或恒定负载下自充电生物超级电容器所实现的功率密度，与连续运行模式下的生物超级电容器相比，可使设备的灵敏度提高10倍（3.82±0.01 mW/cm² mM，充电时间 = 70分钟），与普通酶燃料电池相比提高100倍。该平台有可能在食品或生物医学应用中用作自供电生物传感器。
