Saturday April 20, 2019
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Your body could soon power wearable devices

The study described a small tab (1.5 centimetres long, by one centimetre wide). It delivered a maximum voltage of 124 volts, a maximum current of 10 microamps and a maximum power density of 0.22 millwatts per square centimetre.

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The tab consists of two thin layers of gold, with polydimethylsiloxane (also called PDMS — a silicon-based polymer used in contact lenses, Silly Putty and other products) sandwiched in between. Wikimedia Commons
The tab consists of two thin layers of gold, with polydimethylsiloxane (also called PDMS — a silicon-based polymer used in contact lenses, Silly Putty and other products) sandwiched in between. Wikimedia Commons

Researchers have developed a metallic tab which, when connected to a human body, is capable of generating electricity from bending a finger and other simple movements.

According to a research project led by the University at Buffalo, New York, and Institute of Semiconductors (IoP) at the Chinese Academy of Science (CAS), the tab — a triboelectric nanogenerator — can convert mechanical energy into electrical energy for electronic devices.

“The human body is an abundant source of energy. We thought: ‘Why not harness it to produce our own power?’” said lead author Qiaoqiang Gan, associate professor at the University at Buffalo.

The tab was detailed in the journal Nano Energy. Triboelectric charging occurs when certain materials become electrically charged after coming into contact with a different material. Most everyday static electricity is triboelectric.

Also Read: Scientists Use Pocket-size Device to Map Human Genetic Code

The tab consists of two thin layers of gold, with polydimethylsiloxane (also called PDMS — a silicon-based polymer used in contact lenses, Silly Putty and other products) sandwiched in between.

The tab was detailed in the journal Nano Energy. Wikimedia Commons
The tab was detailed in the journal Nano Energy. Wikimedia Commons

One layer of gold is stretched, causing it to crumple upon release and create what looks like a miniature mountain range. When that force is reapplied, for example, from a finger bending, the motion leads to friction between the gold layers and PDMS.

“This causes electrons to flow back and forth between the gold layers. The more friction, the greater the amount of power is produced,” said Yun Xu, a professor at the IoP.

The study described a small tab (1.5 centimetres long, by one centimetre wide). It delivered a maximum voltage of 124 volts, a maximum current of 10 microamps and a maximum power density of 0.22 millwatts per square centimetre.

Also Read: Mitra: An Indian Robot That Greets You With A ‘Namaste’

That is not enough to quickly charge a smartphone, but it lit 48 red LED lights simultaneously. The team is planning to use larger pieces of gold, which when stretched and folded together are expected to deliver even more electricity.

The researchers are also working on developing a portable battery to store energy produced by the tab. They envision the system serving as a power source for various wearable and self-powered electronic devices. (IANS)

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Google Pay Users Can Now Even Buy Gold Through the App

The petitioner has sought direction to the RBI to stop Google Pay operation in India

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The app "Google Pay" displayed on a user's Smartphone.

Aiming to make Google Pay more useful for Indian users, Google on Thursday announced its partnership with MMTC-PAMP India for buying and selling gold through the application.

MMTC-PAMP India Pvt. Ltd is an internationally recognised metal and mining service provider.

“Google Pay users would be able to buy 99.99 per cent, 24 karat gold after this partnership with India’s only LBMA accredited gold refinery,” the company said in a statement.

With this, Google Pay users can purchase gold for any value that will be stored in secure vaults on their behalf by MMTC-PAMP. The users can buy and sell the gold any time at the latest price, refreshed every few minutes, as displayed on the Google Pay app.

Google Pay.

“Gold is core to Indian culture and tradition, making India the world’s second largest consumer of gold. Keeping this in mind, we introduced gold buying and selling feature on Google Pay for millions of Indians who can buy gold right from their mobile phones,” said Ambarish Kenghe, Director-Product Management, Google Pay, India.

The announcement came as the Delhi High Court on Wednesday asked the Reserve Bank of India (RBI) and Google India Digital Services Private Limited to file a reply on a plea alleging Google Pay not being listed as an authorised operator as per a list of the ‘Payment System Operators’.

Also Read- Indians Are Willing To Share Personal Information With Their Banks, Claims Study

A division bench of Chief Justice Rajendra Menon and Justice Anup Jairam Bhambhani issued notice to the RBI and Google India Digital Services Private Limited on a PIL filed by Abhijit Mishra.

The petitioner has sought direction to the RBI to stop Google Pay operation in India. (IANS)