Researchers at The Ohio State University have demonstrated that common edible fungi—like shiitake mushrooms—can act as organic memristors, switching between electrical states up to about 5,850 signals per second with roughly 90% accuracy, suggesting a potential low-power, biodegradable alternative to conventional semiconductor memory devices. The mushrooms were dehydrated, wired into circuits, and tested in varied electrical regimes; while performance still lags behind state-of-the‐art silicon chips and miniaturisation remains a major hurdle, the work points toward sustainable, brain-inspired computing hardware that relies less on rare-earth metals and high-energy fabrication.
Sources: Phys.org, Ohio State News
Key Takeaways
– Fungal networks (specifically shiitake and button mushrooms) can be grown, dehydrated, wired into circuits and used as organic memristors that “remember” past electrical states—demonstrating memory-chip–like behaviour.
– The mushroom-based devices achieved switching up to ~5,850 Hz with ~90% accuracy in lab tests, but performance declines at higher frequencies and significant work remains on miniaturisation and integration.
– From a conservative technology-and-industry viewpoint, this research signals an interesting alternative hardware paradigm—especially for edge or low-power applications—but it is still far from replacing silicon-based chips in mainstream computing.
In-Depth
In a development that might feel more speculative sci-fi than near-term commercial hardware, scientists at The Ohio State University have shown that mushrooms—yes, the edible kind—might someday function as components in memory and computing systems. The research centres on “memristors,” circuit elements capable of remembering their past electrical states (i.e., resistance depends on previous current). Traditionally, memristors and chip technology rely on sophisticated fabrication, rare-earth materials, and demanding clean-room processes. The Ohio team, however, grew living fungal networks (shiitake and button mushrooms), then dehydrated them to stabilise them, and wired them into electronic circuits. They exposed these fungal devices to electrical stimuli at various voltages and frequencies; one key result was the ability to switch between states at up to 5,850 signals per second (or ~5.85 kHz) with ~90% accuracy. That level of frequency and reliability is modest compared to high-end silicon RAM, but what’s striking is the platform’s unconventional nature—biodegradable, low-cost, and potentially simpler in fabrication.
What does this mean for computing? The vision is that organic or “living” electronics could help circumvent growing concerns about the limits of Moore’s Law, the energy demands of large-scale data centres, and the environmental footprint of electronics manufacturing. Fungi naturally form extensive mycelial networks, and they exhibit electrical properties (e.g., conductivity, adaptive response) that researchers are now beginning to harness. According to the team lead, John LaRocco, these fungal memristors might someday serve in wearable tech, autonomous systems, or edge devices where ultra-low power and sustainable materials are more important than ultra-high speed.
Nevertheless—and this is critical—from a conservative technological and adoption standpoint this research is still very early stage. Some of the hurdles: (1) miniaturisation: the fungal memristors tested are still quite large compared with semiconductor chips and scaling them down is non-trivial; (2) integration: how you reliably integrate such bio-components into standard electronics, ensure durability, temperature stability, production yield, and lifespan is unclear; (3) performance: though 5.85 kHz is notable for a biological substrate, conventional RAM runs orders of magnitude faster, and memory retention, switching speed, error rate, and cycling longevity will all need major improvement. The articles note that at higher frequencies performance dropped—though the remedy in the lab was adding more mushrooms in parallel, which is hardly a conventional manufacturing solution.
For investors, equipment manufacturers, or chip-industry players, the takeaway is: keep an eye on bioelectronics as a parallel technology path. It may not displace silicon anytime soon, but in niche applications (wearables, sensors, environmentally constrained devices) the value proposition could be real. From a strategic perspective companies and R&D divisions should monitor developments, consider partnerships with materials-science or bioengineering labs, and weigh the long-term potential of sustainable computing materials. For now, though, this remains an exciting but experimental demonstration rather than a near-term market disruptor.
In summary: Fungal memory chips underscore that nature continues to surprise us—and that computing hardware may someday grow instead of being built. But the road from lab curiosity to production-ready hardware is long. Still, for those watching the frontier of low-power, sustainable computing, mushrooms may be a squiggly line worth tracking.