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People say we're running out of energy. That's only true if we stick with these old 19th century technologies. We are awash in energy from sunlight.

 

Ray Kurzweil

 

MIT creates glucose fuel cell to power implanted brain computer interfaces

RATE THIS! +0
Posted in Science on 14th Jun, 2012 10:59 AM by AlexMuller

Neuroengineers at MIT have created a implantable fuel cell that generates electricity from the glucose present in the cerebrospinal fluid that flows around your brain and spinal cord. In theory, this fuel cell could eventually drive low-power sensors and computers that decode your brain activity to interface with prosthetic limbs.

 

The glucose-powered fuel cell is crafted out of silicon and platinum, using standard semiconductor fabrication processes. The platinum acts as a catalyst, stripping electrons from glucose molecules, similar to how aerobic animal cells (such as our own) strip electrons from glucose with enzymes and oxygen. The glucose fuel cell products hundreds of microwatts (i.e. tenths of a milliwatt), which is a surprisingly large amount — it’s comparable to the solar cell on a calculator, for example. This should be more than enough power to drive complex computers — or perhaps more interestingly, trigger clusters of neurons in the brain. In theory, this glucose fuel cell will actually deprive your brain of some power, though in practice you probably won’t notice (or you might find yourself growing hungry sooner…)

 

Size-wise, the MIT engineers have created glucose-powered fuel cells that are as large as 64x64mm (2.5in), or as small as just a few millimeters. In the picture above, the large yellow square is a single 64x64mm fuel cell, and it’s surrounded by a bunch of smaller versions. Presumably the largest fuel cell produces the most electricity — but at that size, I don’t think it would fit inside a human brain at least. You could quite easily implant a few dozen of the smallest fuel cells in your spinal cord, however.

 

This discovery is exciting for two main reasons: a) The fuel cell is completely synthetic, and b) they can be produced using low-tech, decades-old chip fabrication processes. Glucose fuel cells have been created before, primarily to power pacemakers, but they used biological enzymes (like your own cells) — and enzymes need to be replenished. Platinum, however, will happily strip electrons from glucose indefinitely. Platinum also has the added bonus of being very biocompatible — i.e. your immune system doesn’t try to reject it. Cerebrospinal fluid is almost entirely devoid of cells, too — it’s basically just a glucose-rich fluid that insulates your brain and spine. Because there are no cells, this means there are no white blood cells that can reject the fuel cell.

 

Ultimately, this fuel cell will hopefully be used to power implanted, ultra-low-power devices that sit inside your skull or spinal cord. In actual fact, MIT’s research into this fuel cell was led by Rahul Sarpeshkar, who happens to be one of the leaders of hybrid digital-biological devices. So far, implanted devices have mostly been tethered to a wall socket — but now, Sarpeshkar’s group can begin work on implants that are completely self-powered.

 



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Comments

Author: Guest
Posted: 2012-07-30
+0
I saw something on tieoviseln about it. I think the carpet is usually held a design that makes you look away from her. So you can concentrate on the playground, not the colors Boden.Soweit go, it is usually brightly colored. Red, green, purple and gold are widely used. Anything that involves money, power and wealth. Fade colors are really not used very often at all. Reply
Author: Guest
Posted: 2013-10-24
+0
YWbqlh Major thankies for the article.Really thank you! Really Cool. Reply
Author: Guest
Posted: 2013-10-25
+0
H6bUMD Fantastic post.Really looking forward to read more. Cool. Reply
Author: Guest
Posted: 2013-11-22
+0
You are soooooo adrlobae, Janie! Your playful nuances and mannerisms reach out through the video, so it feels like you're sitting right across from me and wow, your hair looks a bit like mine in texture and color (I colored my lighter blonde hair dark blonde recently and may even go brunette yikes, my natural hair color I last showed back in 8th grade). Well, I think your new do is much a do about nothin', and although it looks like our girl's gonna have sum splainin to do I'm sure she'll creatively manage the hairy situation with her usually smooth style. Luv ya, babes xxoo xxoo Reply


 

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