Gold coated optical fibers as three-dimensional electrodes for microfluidic enzymatic biofuel cells: Toward geometrically enhanced performance

Abstract

For the first time, we report on the preliminary evaluation of gold coated optical fibers (GCOFs) as three-dimensional (3D) electrodes for a membraneless glucose/ O 2 enzymatic biofuel cell. Two off-the-shelf 125 lm diameter GCOFs were integrated into a 3D microfluidic chip fabricated via rapid prototyping. Using soluble enzymes and a 10 mM glucose solution flowing at an average velocity of 16 mm s À1 along 3 mm long GCOFs, the maximum power density reached 30.0 6 0.1 lW cm À2 at a current density of 160.6 6 0.3 lA cm À2 . Bundles composed of multiple GCOFs could further enhance these first results while serving as substrates for enzyme immobilization. V C 2015 AIP Publishing LLC.

A plant-like battery: a biodegradable power source ecodesigned for precision agriculture

“…[12][13][14][15][16] For instance, mFCs exploiting methanol, ethanol, or glucose as fuel have been reported. [17][18][19][20][21][22][23][24][25] The possibility of driving low-consumption electronic systems, including wireless sensors, was also demonstrated. 26 mFCs have thereby been envisioned as promising candidates to replace small conventional primary batteries.…”