Singapore Scientists Seek Power from Darkness through Shadow Energy

Dr. Swee Ching Tan holds a cardboard panel to cast a shadow over the shadow effect generator device next to an electrometer at a lab in the National University of Singapore June 26, 2020. (Reuters)
Dr. Swee Ching Tan holds a cardboard panel to cast a shadow over the shadow effect generator device next to an electrometer at a lab in the National University of Singapore June 26, 2020. (Reuters)
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Singapore Scientists Seek Power from Darkness through Shadow Energy

Dr. Swee Ching Tan holds a cardboard panel to cast a shadow over the shadow effect generator device next to an electrometer at a lab in the National University of Singapore June 26, 2020. (Reuters)
Dr. Swee Ching Tan holds a cardboard panel to cast a shadow over the shadow effect generator device next to an electrometer at a lab in the National University of Singapore June 26, 2020. (Reuters)

Scientists in Singapore are hoping to perfect a new method of power generation driven largely by shadows, with the hope that it could one day help highly urbanized cities power themselves.

The shadow-effect energy generator (SEG) being developed by the National University of Singapore has the potential to harness power like solar cells, but without needing open spaces with uninterrupted light.

To work effectively, the SEG requires both light and dark and, like solar panels, relies on light to shine on silicon to energize electrons.

However, using panels that feature a thin layer of either gold, silver, platinum or tungsten, the difference in light intensity drives electrons from lit areas towards the shade, creating electricity in the shaded areas.

“Our shadow effect generator comes in handy. It can be placed in those areas to harvest obstructed light,” said research team leader Dr. Swee Ching Tan.

The research is still in its early stages yet Tan’s team is already thinking about the potential of establishing a company to make SEG available for home use.

The panels the team have been testing are about 6 sq cm in size and capable of producing just 0.25 volts, meaning about 20 are needed to power a light bulb, or charge a cellphone.

The ideal environment for use would be cities, Tan said, with constantly shifting levels of light and shade throughout the day from clusters of tall buildings and the sun’s changing position in the sky.

“It’s not practical to place solar cells in such cities. So the device might come in handy in places like very densely populated cities, where skyscrapers are everywhere, where shadows are always persistent,” Tan said.



Apple Appealing against UK 'Back Door' Order, Tribunal Confirms

Apple iPhone 16 smartphones are displayed at a store in London, Britain, October 6, 2024. REUTERS/Hollie Adams/File Photo
Apple iPhone 16 smartphones are displayed at a store in London, Britain, October 6, 2024. REUTERS/Hollie Adams/File Photo
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Apple Appealing against UK 'Back Door' Order, Tribunal Confirms

Apple iPhone 16 smartphones are displayed at a store in London, Britain, October 6, 2024. REUTERS/Hollie Adams/File Photo
Apple iPhone 16 smartphones are displayed at a store in London, Britain, October 6, 2024. REUTERS/Hollie Adams/File Photo

Apple is appealing against a British government order to create a "back door" to its encrypted cloud storage systems, the Investigatory Powers Tribunal (IPT) confirmed on Monday.

The IPT said in a written judgment that it had refused an application by the British government that "the bare details of the case", including that it was brought by Apple, be kept private.

The ruling follows a hearing in London last month, which was held in secret with media not allowed to attend.

The Washington Post reported in February that Britain had issued a "technical capability notice" to Apple to enable access to encrypted messages and photos, even for users outside the country, Reuters reported.

The iPhone maker in response removed its most advanced security encryption for cloud data, called Advanced Data Protection, for new users in Britain.

Details of the case have been shrouded in

secrecy

and neither Apple nor the British government have publicly confirmed the technical capability notice.