The best of EcoWatch, right in your inbox. Sign up for our email newsletter!
Could 'Bionic Mushrooms' Be the Future of Renewable Energy?
The latest renewable energy breakthrough took place over a lunch.
Sudeep Joshi, a postdoctoral fellow at Stevens Institute of Technology, told BBC News that he and some colleagues were discussing the problem of cyanobacteria. These are organisms that can convert sunlight into electric current. The problem? They don't live long enough on artificial lab equipment for researchers to be able to take much advantage of that fact.
"One day my friends and I went to lunch together and we ordered some mushrooms," Joshi told BBC News. "As we discussed them we realized they have a rich microbiota of their own, so we thought why not use the mushrooms as a support for the cynaobacteria. We thought let's merge them and see what happens."
So Joshi and Manu Mannoor, an assistant professor of mechanical engineering at Stevens who runs the lab Joshi works in, took ordinary button mushrooms and used 3D printing to combine them with the bacteria.
A Stevens press release explained the process:
Mannoor and Joshi used a robotic arm-based 3D printer to first print an "electronic ink" containing the graphene nanoribbons. This printed branched network serves as an electricity-collecting network atop the mushroom's cap by acting like a nano-probe—to access bio-electrons generated inside the cyanobacterial cells. Imagine needles sticking into a single cell to access electrical signals inside it, explains Mannoor.
Next, they printed a "bio-ink" containing cyanobacteria onto the mushroom's cap in a spiral pattern intersecting with the electronic ink at multiple contact points. At these locations, electrons could transfer through the outer membranes of the cyanobacteria to the conductive network of graphene nanoribbons. Shining a light on the mushrooms activated cyanobacterial photosynthesis, generating a photocurrent.
The result? Something Manoor calls a "bionic mushroom" that generates electricity, pictured below.
The research team published their results in Nano Letters Wednesday. In addition to proving their idea was possible, they also showed that the bacteria lived for several more days on living mushrooms, compared to lab equipment or dead mushrooms. They also showed that 3D printing made a difference. Using it, they were able to more densely pack the bacteria, which increased its electric output. The dense, 3D printed bacteria generated eight times the electricity of bacteria placed with a normal pipette.
This first bionic mushroom is just the beginning. Several mushrooms wired together could power a small lamp, researchers told BBC News, but their ambitions shine even brighter than that.
"Right now we are using cyanobacteria from the pond, but you can genetically engineer them and you can change their molecules to produce higher photo currents, via photosynthesis," Joshi told BBC News. "It's a new start; we call it engineered symbiosis. If we do more research in this we can really push this field forward to have some type of effective green technology."
- Cyanobacteria-Based Biofuel: an Innovative Platform for Clean ... ›
- Mushrooms, whales and hurricanes: how bio-inspiration boosts ... ›
- These Solar Farms Have A Secret Hiding Under Them: Mushrooms ›
EcoWatch Daily Newsletter
The federal government is looking into the details from the longest running oil spill in U.S. history, and it's looking far worse than the oil rig owner let on, as The New York Times reported.
By Tara Lohan
When armed militants with a grudge against the federal government seized the Malheur National Wildlife Refuge in rural Oregon back in the winter of 2016, I remember avoiding the news coverage. Part of me wanted to know what was happening, but each report I read — as the occupation stretched from days to weeks and the destruction grew — made me so angry it was hard to keep reading.
A searing heat wave has begun to spread across Europe, with Germany, France and Belgium experiencing extreme temperatures that are set to continue in the coming days.
In the 1980s, a Greenlandic subsistence hunter shot and killed a whale with bizarre features unlike any he had ever seen before. He knew something was unique about it, so he left its abnormally large skull on top of his toolshed where it rested until a visiting professor happened upon it a few years later.