Paper-Based Membraneless Co-Laminar Microfluidic Glucose Biofuel Cell With MWCNT-Fed Bucky Paper Bioelectrodes

Abstract

This paper establishes a membraneless, co-laminar flow-based approach to develop a cost-effective microfluidic paper-based analytical device for enzymatic biofuel cell ( PAD-EBFC). The developed PAD-EBFC supporting the self-capillary fluid transport action consists of Y-shaped paper microchannel with the fuel (glucose) and oxidant (O) streaming in parallel over carbon nanotube-based bucky paper electrodes modified with biocompatible electrocatalytic enzymes, such as glucose oxidase and laccase without any additional redox cofactor. The electrochemical performance for the modified bioelectrodes, i.e., electrocatalytic oxidation and reduction reaction, was carried out using linear sweep voltammetry, cyclic voltammetry, and open circuit potential. The overall performance of PAD-EBFC was evaluated using the polarization studies. Subsequently, the catalytic activity of enzymes on the electrode surface was validated by the scanning electron microscope. This simple and portable PAD-EBFC can generate the maximum power density to the order of /cm ( /cm) at 0.505 V over prolonged durations of around 50 h. Hence, the presented PAD-EBFC shows good power density and stability, leading to its strong potential to power miniaturized microelectronics devices and sensors.

Single microfluidic fuel cell with three fuels – formic acid, glucose and microbes: A comparative performance investigation

“…The biocathodes were tested in the presence and absence of oxygen conditions. In the presence of oxygen, the maximum catalytic current density of 0.7 mA cm -2 was observed in Figure 6c due to the cupric ions redox reaction happening during the enzymatic mechanism of laccase at a voltage of -0.6 V [43]. This confirms the efficient immobilization of enzyme and oxygen prominence during the cathodic reaction process [35].…”

An ambient-stable and stretchable ionic skin with multimodal sensation

“…The existing ionic devices usually convert the applied touch, pressure, deformation or temperature into a change in their resistance or capacitance, the electrical readout of which requires continuous power supply with voltages typically of 1-10 V 26 and power consumptions of up to 0.015 mW (i.e., around 3 AA batteries per week). 24 Although stretchable batteries can be integrated with those ionic devices, 27 the requirement of external or on-chip power supplies still, to some extent, compromises long-term usage. Further development is needed toward a multifunctional self-powered ionic device.…”

Optimized Shelf-Stacked Paper Origami-Based Glucose Biofuel Cell with Immobilized Enzymes and a Mediator

“…Correspondingly, in 2018, our group reported Y-shaped membraneless μPAD-EBFCs, where Bucky paper (BP)-based bioelectrodes were modified with GOx and laccase enzymes with MET electrochemistry. This work reported a maximum OCP of 0.570 V with a PD of 100 μW/cm 2 at 40 mM glucose concentration . Although the harvested power was almost sufficient to power small portable devices, it still needs to be enhanced further for use in other practical applications.…”