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We developed a paper-based self-powered sensor patch for detecting glucose levels in sweat. This wearable, non-invasive biosensor made use of the integration of a vertically stacked paper-based glucose/oxygen enzymatic fuel cell into a standard Band-Aid patch. The paper-based device, attached directly to human skin, wicked sweat from human skin and monitored an electrochemical energy conversion as...
We created a paper-based microbial fuel cell (MFC) which generated power from human saliva. Upon adding one drop of saliva, the dried exoelectrogens, pre-inoculated in a conductive paper reservoir of the MFC, activated their respiration by oxidizing organic substrates (e.g. glucose) in the saliva and transferring electrons to the anode. The device generated the maximum current density of 10.5μΑ/cm...
We created a 9-cell biobattery stack on paper, which was capable of generating bio-power from microbial metabolism, delivering on-board energy to the next generation of paper-based systems. The developed biobattery stack has competitive advantages over other paper-based batteries in resource-limited and remote regions because water in every environment generally hosts various microorganisms that can...
We report a microliter-sized (140 µL) microbial fuel cell (MFC)-based biosensor integrated with a three-electrode configuration and an air-bubble trap, in which microorganisms act as the sensor for toxic substances in water. The small-scale MFC biosensor produced favorable conditions for (i) reducing measurement time by increasing the probability of cell attachment and biofilm formation in the micro-sized...
We report a microfluidic-based protein sensing technique using pattern generation of a mixture of multiple proteins based on the competitive protein adsorption. We prepared four pre-adsorbed surfaces: lysozyme, albumin, transferrin, and IgG, on a gold surface, to obtain a selective and sensitive detection of a target protein, C-reactive protein (CRP) in a controlled cocktail. The microfluidic device...
A distributed feedback laser has been demonstrated as a label free biosensor. The stimulated emission wavelength changes with the refractive index variations on the sensor surface. The sensor exhibits high resolution and wide dynamic range.
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