In this paper, we propose and demonstrate the possibility of using Bacterial Cellulose (BC), a bio-derived polymer, for the realization of fractional order electronic devices. BC, unlike plant-derived cellulose, is produced by some genera of bacteria, if a suitable culture is maintained. Compared to plant-derived cellulose, BC can be obtained with a green and low-energy production process, which does not produce pollutants nor carbon composites. BC is used as the bulk in a capacitor-like structure. The device impedance has been investigated and experimental evidence of its fractional nature is given. A model is proposed and a possible explanation of the involved phenomena is provided.
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