Researchers have developed a unique type of film for cameras using layers of light-sensitive bacteria. Although it requires four hours for exposure and only works with red light, the film achieves high resolution quality.
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The researchers used the bacterial film to create an image of the “Flying Spaghetti Monster” (FSM). |
“Living camera” uses light to induce gene expression in bacteria, creating a “photo-sensitive chemical” that can darken color. With its small size, the bacteria enable the sensor to transmit a resolution of 100 megapixels per 2.5 cm².
To construct the biological sensor, a team led by Chris Voigt at the University of California (USA) chose E. coli bacteria from contaminated food. They introduced genes from photosynthetic green algae into the cell membrane of E. coli. Each gene encodes a protein that reacts to red light. Once activated, this protein inhibits the activity of a second gene, causing a dye to turn black. The result is a monochromatic image displayed on the dense layer of E. coli.
The “living camera” will never appear in stalls but will serve in gene research. However, their success in creating a chain of bacteria responsive to light has paved the way for the development of nanotechnology, wherein tiny substances are produced with high precision using light beams.
The research team is continuing to expand the color range in the sensor. They may use retinol, a substance that helps the retina perceive different colors.
P.T. (NewScientist)
