Researchers have created a remarkable new form of “artificial neuron” that blurs the line between living tissue and electronics: part-biological, part electronic, and very reminiscent of how our real brain cells work.
The breakthrough centers on using protein nanowires derived from the bacterium Geobacter sulfurreducens. These microscopic wires are naturally capable of conducting electricity and were combined with a special electronic component called a memristor (a resistor that “remembers” past voltages). The result: an artificial neuron that operates at the same low voltages as biological neurons- around 0.1 volts- rather than the much higher voltages typical for engineered devices.
Even more striking: these hybrid neurons were able to interface with living heart muscle cells in a dish, control their rhythm, and respond to chemical signals (for example, adrenaline-like molecules) in ways that mirror how biological neurons interact with tissue. This kind of seamless integration between engineered electronics and living cells is rare and holds enormous potential.
Why does it matter? The human brain is extremely efficient, processing vast amounts of information while consuming very little power. Current computer hardware, in contrast, uses separate memory and processing units and consumes much more energy. By building artificial neurons that mirror biological efficiency and function, we may open the door to brain-like computing systems, potentially far more power-efficient, and implants or devices that interact with human tissue in more natural ways.
Of course, there are hurdles ahead. Harvesting the bacterial nanowires is labour-intensive, durability and manufacturing scalability remain uncertain, and long-term reliability hasn’t yet been established. But the path has been laid: devices that not only plug into electronics but actually talk the language of biology. It’s a big step toward smart prosthetics, bio-integrated sensors and next-gen computing that looks, and perhaps feels — more alive.