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Graphene is a thin carbon layer that can be applied in optoelectronics. Researchers are working hard to develop graphene photodetectors, which are crucial for many technologies. However, typical photodetectors made of graphene can only sense light in a small area, which limits their performance.
At present, researchers have developed graphene field-effect transistors that can be activated by light by combining graphene with relatively large silicon carbide materials, thus solving this problem. High performance photodetectors can be applied in many fields, including astrophysics high-speed communication, ultra sensitive cameras, sensing applications, wearable electronic devices, and so on. In addition, graphene transistor arrays will bring high-resolution imaging and display. Future research directions include exploring areas such as scintillators, astrophysical imaging techniques, and high-energy radiation sensors.
4. Graphene May Promote Neural Cell Regeneration
An unconventional engineering technique may be able to overcome obstacles to nerve regeneration. Scientists from Iowa State University have developed a nanotechnology that utilizes inkjet printers to generate multi-layer graphene circuits. The ultimate result of this technology is expected to transform mesenchymal stem cells (forming bone, cartilage, and adipocytes) into Schwann cells, which play multiple roles in promoting the recovery of nerve cells.
In a statement, co lead author and postdoctoral researcher in Biochemical Engineering from Iowa, Metin Uz, stated that this technology may lead to a better way to differentiate stem cells. However, improving this method may affect the repair of damaged nerves in the body.
Based on the research results of the team, it can be concluded that flexible graphene electrodes can adapt to the damaged site and provide direct electrical stimulation for nerve cell regeneration, paving the way for nerve regeneration in vivo.
5. Using Graphene and Gold as Excellent Brain Detectors
A research team from South Korea has developed more efficient neural electrodes that can minimize tissue damage and transmit clear brain signals. Usually, the smaller the electrode, the more difficult it is to detect the signal. However, a team from the Gyeongbei Institute of Technology in Daegu, South Korea has developed a small, flexible, and clear brain signal detector.
The detector consists of electrodes that record brain signals. The signal is transmitted along the interconnection line to the connector, which transmits the signal to the machine for measuring and analyzing the signal. These combined materials have added effective surface area, conductivity, and electrode strength to the probe (detector), while still maintaining softness and compatibility with soft tissue.
This means that the electrode can contract, but it will not reduce signal detection. The interconnection line is made of a mixture of graphene and gold. Graphene is soft, and gold is an excellent conductor. Researchers tested the probe and found that it can clearly read rat brain signals, much better than standard flat gold electrodes. This probe needs to undergo further clinical testing before widespread commercialization.
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