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3D printing technology is becoming more and more mature, bio-solar cells, ear bones, bombs... Objects that can be manufactured by 3D printing are nothing. Recently, MIT has launched a new research project to print “Basic Bacteria†into a “live tattoo†that can be used to create a bio-computer by chemically stimulating the color of the tattoo.
The first step in getting a tattoo to "live" is to find the right cell. In general, animal cells are too fragile and easily broken, which cannot meet the experimental requirements. The multi-selection found that the bacterial cell wall is strong enough to survive the printing process and is also fully compatible with the hydrogel used in 3D printing. Therefore, bacteria are the best choice for "ink" materials.
To demonstrate the results of the research, the researchers applied specific chemicals to the back of the tester's hand and made these trees into a tree-shaped tattoo sticker by 3D printing. They were glued there, and after a few hours, the tree tattoo Reacts with chemicals to be "lighted" into different colors.
The researchers also genetically modified these bacteria, allowing some bacteria to produce color changes only when they received specific signals from other bacteria, and based on this, they printed "output" and "input" respectively. Layer structure, when they overlap, the "input" bacteria will signal due to chemical stimuli, informing the "output" bacteria to change color.
According to the researchers, such a structure is like a very simple combination of electronic components. In the end, it is impossible to create a "living computer" that is hard to imagine. It is not impossible to combine and transmit signals in a similar way through different forms and functions of the basic bacteria to create a complex structure like a microchip.
From a more pragmatic point of view, this technology can be applied to areas that are heavily influenced by chemical factors, such as warning stickers that can respond to certain temperatures and pH values, or health monitoring equipment that is used to monitor targets. on.
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