Biobattery-embedded tattoos to use sweat to power your tech

Scientists have developed a temporary tattoo with a built-in, sweat-powered biobattery that could one day be used to charge your phone while you are out for a run.

The biobattery works using lactate, a key chemical found in sweat that can be used to monitor exercise performance.

This means that the more the wearer sweats, the more energy is going to be produced, creating the interesting scenario where less physically fit people are able to produce more power.

The technology is one of the first examples of skin-based power sources, and could pave the way for a host of technologies powered by devices attached to the skin.

biobattery-tattoo

The biobattery works by using an enzyme to extract the electrons in the sweat’s lactate and move them to the battery. At present, the amount of energy produced is very small, but the researchers are confident that they will be able to develop this to enable small electronic devices to be charged.

“The current produced is not that high, but we are working on enhancing it so that eventually we could power some small electronic devices,” said Dr Wenzhao Jia, a postdoctoral researcher at the University of California San Diego.

“Right now, we can get a maximum of 70 microWatts per cm², but our electrodes are only 2 by 3 millimeters in size and generate about 4 microWatts — a bit small to generate enough power to run a watch, for example, which requires at least 10 microWatts.

“So besides working to get higher power, we also need to leverage electronics to store the generated current and make it sufficient for these requirements.”

The device has also been developed as a lactate monitor, which will be a valuable tool for both doctors and athletes. Previously lactate has been monitored using a series of blood tests, so this monitor is likely to prove simpler and less invasive.

The biobattery’s reliance on sweat means that the amount of power produced can vary significantly depending on the person wearing it.

The researchers tested the initial biobattery on 15 exercise bike-riding volunteers, and found that not only did those who were least fit produce the most energy, but the most regularly active participants produced the least energy.

This could affect the potential success of the technology, as such variation in performance could make it difficult to market.

However, this is one of the first examples of skin-based batteries, and the technology is likely to be developed much further.

“These represent the first examples of epidermal electrochemical biosensing and biofuel cells that could potentially be used for a wide range of future applications,” said Dr Joseph Wang, professor of nanoengineering at University of California San Diego.

From here we could see the development of an array of wearable technologies and gadgets siphoning power through our skin, perhaps even one day powering whole computers, medical augmentations and more.


Inline image courtesy of Dr Joseph Wang.


Researchers believe modified CRISPR could be used without editing DNA

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Source: Gizmodo

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Apparently, gaming can save your brain

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Source: Ars Technica

The maker of Budweiser beer reserves 40 Tesla electric trucks

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The UK government is launching a fintech competition to help renters get on the property ladder

The UK government is offering £2 million to fintech developers who come up with a tool that lets renters record and share their payment data.

The Rent Recognition Challenge, which was first announced as part of the chancellors’ autumn budget, will task developers with finding a way to record payment data from Britain’s 11 million renters in a bid to improve their credit scores and ultimately help them to get a mortgage.

“Most lenders and Credit Reference Agencies are unable to take rental data into account, because they don’t have access to it.

“The Rent Recognition Challenge will challenge firms to develop an innovative solution to this problem and help to restore the dream of home ownership for a new generation,” said the economic secretary to HM Treasury, Stephen Barclay.

Economic secretary to HM Treasury, Stephen Barclay. Image courtesy of Chris McAndrew

The competition will provide an initial round of grant funding to six promising proposals to help turn their ideas into workable products.

A panel of leading figures from the Fintech sector will then whittle the six down to just a handful of teams who will receive further funding and support to bring their ideas to market.

“People’s monthly rent is often their biggest expense, so it makes sense for it to be recognised when applying for a mortgage. Without a good credit score, getting a mortgage can be a real struggle.”

Image courtesy of Jeff Djevdet

The government’s attempt to help more people out of private renting arrangements and into home ownership comes after Scottish Widows published a report that warned tomorrow’s pensioners will have to find huge amounts of money to pay ever-escalating rents to private landlords.

Scottish Widows projected one in eight retirees will be renting by 2032, which works out to three times the number renting today. It also said there is a £43bn gap between the income and savings people have now and what the rent bill will be in retirement.

Speaking to the Guardian, Dan Wilson Craw of campaign group Generation Rent said: “The common perception is that retirees either own their home outright or have a council tenancy, so the government will be in for a nasty shock as more of us retire and continue to rent from a private landlord.

“Many renters relying on pensions will qualify for housing benefit which will put greater strain on the public finances.”

The Rent Recognition Challenge will open to applications early in the New Year, and development will conclude in October 2018.