Abstract
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(-2) and 3.8 mW cm(-2) 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(-2) mM(-1), 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.
| Original language | English |
|---|---|
| Article number | 112909 |
| Journal | Biosensors and Bioelectronics |
| Volume | 176 |
| DOIs | |
| Publication status | Published - 15 Mar 2021 |
| MoE publication type | A1 Journal article-refereed |
Keywords
- Self-powered biosensor
- Self-charging biosupercapacitor
- Fructose dehydrogenase
- Conducting polymer
- Enzyme-based electrode
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Åbo Akademi Functional Printing Center
Toivakka, M. (PI), Rosenholm, J. (PI), Anttu, N. (PI), Bobacka, J. (PI), Huynh, T. P. (PI), Peltonen, J. (PI), Wang, X. (PI), Wilen, C.-E. (PI), Xu, C. (PI), Zhang, H. (PI) & Österbacka, R. (PI)
Faculty of Science and EngineeringFacility/equipment: Facility