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.



Trump: China Would Have Agreed TikTok Deal if Not for US Tariffs

FILE PHOTO: A man leaves the US headquarters of the social media company TikTok in Culver City, California, US January 17, 2025.  REUTERS/David Swanson/File Photo
FILE PHOTO: A man leaves the US headquarters of the social media company TikTok in Culver City, California, US January 17, 2025. REUTERS/David Swanson/File Photo
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Trump: China Would Have Agreed TikTok Deal if Not for US Tariffs

FILE PHOTO: A man leaves the US headquarters of the social media company TikTok in Culver City, California, US January 17, 2025.  REUTERS/David Swanson/File Photo
FILE PHOTO: A man leaves the US headquarters of the social media company TikTok in Culver City, California, US January 17, 2025. REUTERS/David Swanson/File Photo

US President Donald Trump said Sunday that China would have agreed to a deal on the sale of TikTok if it were not for the tariffs imposed by Washington on Beijing last week.

Trump on Friday extended the deadline for TikTok to find a non-Chinese buyer or face a ban in the United States, allowing 75 more days to find a solution -- a day after imposing additional 34 percent duties on all Chinese imports.

"The report is that we had a deal, pretty much for TikTok, not a deal, but pretty close, and then China changed the deal because of tariffs. If I gave a little cut in tariffs, they'd approve that deal in 15 minutes, which shows you the power of tariffs," Trump told reporters aboard Air Force One.

The hugely popular video-sharing app, which has more than 170 million American users, is under threat from a US law passed last year that orders TikTok to split from its Chinese owner ByteDance or get shut down in the United States.

Trump had insisted his administration was near a deal to find a buyer for TikTok and keep it from shutting down that would involve multiple investors, but gave few details.

ByteDance, while confirming that it was in talks with the US government towards finding a solution, warned that there remained "key matters" to solve.

"An agreement has not been executed" and whatever was decided would be "subject to approval under Chinese law," the company added.