comscore Bacteria in printed circuits can produce electricity even without light
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Bacteria in printed circuits can produce electricity even without light

Unlike conventional solar cells, cyanobacteria can generate an electric current both in the dark and in light.

  • Published: November 29, 2017 8:56 AM IST
bacteria

Scientists have printed circuits using cyanobacteria – microbes that can turn light into energy – to create solar cells using a simple inkjet printer. Unlike conventional solar cells that operate only when exposed to light, cyanobacteria can generate an electric current both in the dark and in light. Also Read - Facebook for Android will soon get dark mode and coronavirus tracking feature

The cell may serve as an environment friendly power supply for low-power biosensors and can even be scaled up to print a bioenergy wallpaper. “Our biophotovoltaic device is biodegradable and in the future could serve as a disposable solar panel and battery that can decompose in our composts or gardens,” Marin Sawa from Imperial College London told ‘Phys.org’. Also Read - Scientists develop soft contact lens that can zoom with a blink

“Cheap, accessible, environmentally friendly, biodegradable batteries without any heavy metals and plastics – this is what we and our environment really need but don’t have just yet, and our work has shown that it is possible to have that,” said Sawa. Biophotovoltaic cells contain some type of cyanobacteria or algae that is phototrophic, meaning it converts light into energy. Also Read - Increasing smartphone usage may be resulting in growing horns on our skull; research suggests

Currently one of the biggest challenges facing biophotovoltaic cells is producing them on a large scale. Typically, the organisms are deposited onto an electrode surface from a bulky liquid reservoir. In the new study, researchers showed that inkjet printing can be used to print both the carbon nanotube electrode surface and the cyanobacteria on top of it, while allowing the bacteria to remain fully viable.

Researchers showed that nine connected cells can power a digital clock or generate flashes of light from an LED, illustrating the ability to produce short bursts of relatively high power. The researchers also showed that the cells can generate a continuous power output over the course of a 100-hour period consisting of light and dark cycles.

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  • Published Date: November 29, 2017 8:56 AM IST



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