Nanotechnology transformation spinach can detect dangerous substances [Full text]

Technology dynamic groundwater or the presence of certain dangerous substances difficult for humans to detect it, but the use of nano-technological transformation of spinach plants able to do. Engineers in the United States embed carbon nanotubes in the leaves, turn the spinach into a sensor that can detect dangerous substances, and wirelessly transfer information to handheld devices such as smartphones.


Nanotechnology transforms spinach to detect dangerous substances

Michael Strano, a professor of chemical engineering at the Massachusetts Institute of Technology who led the study, said that the goal of this nano-biomimetic technology is to introduce nanoparticles into plants and give them non-native functions.

In a paper published in the October 31 issue of Nature Materials, the researchers stated that they used a technique called "blood perfusion" to inject a solution containing nanoparticles into the back of the leaves - that is, nitro Aromatic sensors are embedded in the most mesophyll layers of photosynthesis in spinach leaves. The researchers also embedded carbon nanotubes that emit a constant fluorescent signal as a reference. By comparing the two fluorescent signals, it is easier to determine whether the sensor has detected a dangerous substance, such as the presence of dangerous molecules in the groundwater, and the plant can transmit it to the blade embedded with the sensor in 10 minutes.

To read the signal, the researchers hit the laser on the blade and excited the nanotubes to emit near-infrared fluorescence. Fluorescence can be detected by an infrared camera connected to a small computer. With the removal of infrared filters, ordinary smartphones with camera functions can also detect this signal. At present, researchers have been able to test at a distance of 1 meter from the plant.

Strano said that the new method offers the possibility of overcoming communication barriers between plants and humans. It can also be used to alert environmental issues such as pollution and drought. In addition, the new technology is versatile and can be extended to any plant in the future. Botanists use these sensors to better monitor plant health and maximize the production of plant-derived pharmaceutical compounds. Next, they will use genetic engineering technology to genetically modify plants so that plants do not generate chlorophyll anymore. Instead, they change the color of the leaves with different material composition. The plants thus obtained can be completed without relying on additional devices such as infrared sensors. Detection task. (Original title: Nano-bionic technology for detecting dangerous substances with spinach)

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