Paper on biological diodes https://arxiv.org/pdf/1706.00383.pdf https://arxiv.org/pdf/1706.00383.pdf but it doesn't use semiconductors, but ion transport (calls

Paper on biological diodes https://arxiv.org/pdf/1706.00383.pdf https://arxiv.org/pdf/1706.00383.pdf but it doesn't use semiconductors, but ion transport (calls it iontronics instead of solid state electronics) Indeed the ion channels used by nerves and muscles to send electrical signals are, like, one-way valves for ions