Soft Biocompatible Memory Device

Biocompatible electronic devices created by North Carolina State researchers are soft and function well in wet environments. “We’ve created a memory device with the physical properties of Jell-O,” says Dr. Michael Dickey, an assistant professor of chemical and biomolecular engineering at NC State.


(Biocompatible electronic devices)

Conventional electronics are typically made of rigid, brittle materials and don’t function well in a wet environment. “Our memory device is soft and pliable, and functions extremely well in wet environments – similar to the human brain,” Dickey says.

Prototypes of the device have not yet been optimized to hold significant amounts of memory, but work well in environments that would be hostile to traditional electronics. The devices are made using a liquid alloy of gallium and indium metals set into water-based gels, similar to gels used in biological research.

The device’s ability to function in wet environments, and the biocompatibility of the gels, mean that this technology holds promise for interfacing electronics with biological systems – such as cells, enzymes or tissue. “These properties may be used for biological sensors or for medical monitoring,” Dickey says.

The device functions much like so-called “memristors,” which are vaunted as a possible next-generation memory technology. The individual components of the “mushy” memory device have two states: one that conducts electricity and one that does not. These two states can be used to represent the 1s and 0s used in binary language. Most conventional electronics use electrons to create these 1s and 0s in computer chips. The mushy memory device uses charged molecules called ions to do the same thing.

In each of the memory device’s circuits, the metal alloy is the circuit’s electrode and sits on either side of a conductive piece of gel. When the alloy electrode is exposed to a positive charge it creates an oxidized skin that makes it resistive to electricity. We’ll call that the 0. When the electrode is exposed to a negative charge, the oxidized skin disappears, and it becomes conducive to electricity. We’ll call that the 1.

Normally, whenever a negative charge is applied to one side of the electrode, the positive charge would move to the other side and create another oxidized skin – meaning the electrode would always be resistive. To solve that problem, the researchers “doped” one side of the gel slab with a polymer that prevents the formation of a stable oxidized skin. That way one electrode is always conducive – giving the device the 1s and 0s it needs for electronic memory.


(Liquid metal forms basis of soft biocompatible memory)

I was also fascinated by the idea that an electronic memory device could have liquid metal components, as it makes me think of one of my favorite movie villains.


(Terminator 2 liquid metal robot)

From Towards All-Soft Matter Circuits: Prototypes of Quasi-Liquid Devices with Memristor Characteristics via MedGadget.

Scroll down for more stories in the same category. (Story submitted 7/22/2011)

Follow this kind of news @Technovelgy.

| Email | RSS | Blog It | Stumble | del.icio.us | Digg | Reddit |

Would you like to contribute a story tip? It's easy:
Get the URL of the story, and the related sf author, and add it here.

Comment/Join discussion ( 0 )

Related News Stories - (" Robotics ")

China Building Robot Wives
'Want a life-companion, a pleasant one?' - Alice W. Fuller, 1895.

Stan, Robot Valet, Will Drag Your Car Away
'He activated the grapple tracks. ' - Frank Herbert, 1977.

Jibo Home Robot Says Goodbye, Is Killswitched
'It resembles an oyster....' Philip K. Dick, 1968.

I Can't Resist Worm Robots
'Seen close it was not completely flexible...' - Harry Harrison, 1962.

 

Google
  Web TechNovelgy.com   

Technovelgy (that's tech-novel-gee!) is devoted to the creative science inventions and ideas of sf authors. Look for the Invention Category that interests you, the Glossary, the Invention Timeline, or see what's New.

 

 

 

 

 

Current News

Unfurl The Future! Huawei Mate X versus Galaxy Fold
'A paper thin polycarbon screen unfurled silently from the top of the unit and immediately grew rigid.'

Amazon Echo And Google Home Should Have Morality Software
'The Dwoskin Morality Rating-Computer could 'spot the slightest tendency to deviation' from the social norm...'

China Building Robot Wives
'Want a life-companion, a pleasant one?'

China Social Credit System Like State-Run Whuffie
'At least there was no mandatory Whuffie check on the monorail platform...'

Project Soli Radar Gesture Chip Now FCC Approved
'He waved his hand and the circuit switched abruptly.'

Stan, Robot Valet, Will Drag Your Car Away
'He activated the grapple tracks. '

Jibo Home Robot Says Goodbye, Is Killswitched
'It resembles an oyster....'

Johns Hopkins Says Asteroid Deflection Will Be Difficult
'This obelisk is one huge deflector mechanism...'

Fabric Automatically Cools Or Insulates Based On Environment
'...a high-efficiency filter and heat-exchange system.'

Deepfakes From OpenAI GPT-2 Algorithm
'How can you compete with an IBM heavy-duty logomatic analogue?'

John Deere Self-Driving Tractor
'The huge plow... seemed to shake itself - and began to move back southward.'

North Focals Smart Glasses Provide Augmented Reality In Style
'The world ... is drenched in unfamiliar information all the way to the horizon.'

Tesla Driver Caught Napping Behind The Wheel
'Mary Risling settled back for a little nap...'

Hayabusa 2 To Begin Asteroid Mining
'We must dig down, and then doubtless we shall find the metal.'

Ionocraft Drone Powered By Electrohydrodynamic Thrust
'He saw one hiss by him as he rounded the corner, trailing a short whip antenna...'

Purdue Pharma Ready To Profit From OxyContin Use Or Addiction Recovery
'It may be organic damage. It may be permanent. Time'll tell, and only after you are off Substance D for a long while.'

More SF in the News Stories

More Beyond Technovelgy science news stories

Home | Glossary | Invention Timeline | Category | New | Contact Us | FAQ | Advertise |
Technovelgy.com - where science meets fiction™

Copyright© Technovelgy LLC; all rights reserved.