Scientists developing this new device are conducting research in the field of nano supercapacitors (nBSC), which is a traditional capacitor that has been reduced to the sub-millimeter level. Developing this type of device is quite tricky, but researchers are trying to create a device that can work safely in the human body to power miniature sensors and implants. This requires the replacement of problematic materials and corrosive electrolytes with biocompatible materials. Sexual material.
It is reported that this device is called a biological supercapacitor. Although the smallest device developed so far has a body strength of more than 3mm3, scientists have made great progress in miniaturizing the capacitor. The first is a stack of polymer layers. These polymer layers sandwich a layer of photosensitive photoresist material-acting as a current collector, a diaphragm and an electrode. The electrode is made of a conductive biocompatible called PEDOT:PSS Made of sex polymers.
This polymer layer is placed on the surface of the sheet, and the different layers are separated in a highly controllable manner through high mechanical tension. In addition, it can be folded into an origami-style nano-biological supercapacitor-the volume is 0.001mm3, which takes up space Smaller than a grain of dust. Therefore, these tubular bio-supercapacitors are 3000 times smaller than previously developed, but the power level is about the same as the voltage of AAA batteries.
These tiny devices were then placed in saline, plasma, and blood, where they demonstrated their ability to successfully store energy. Facts have proved that this biological supercapacitor is particularly effective in the blood. After 16 hours of operation, it can retain 70% of its capacity. Another reason why blood may be a suitable home for the team’s biological supercapacitor is that the device can work with the inherent oxidoreductase reaction and living cells in solution, and supercharge its own charge storage reaction to increase its performance. Increased by 40%.
The team also placed the device in a microfluidic channel--a bit like an aerodynamic wind tunnel test--that allowed it to withstand the forces that might be felt in the blood vessels that flow and fluctuate in pressure. In addition, they used three devices connected together and successfully powered a tiny pH sensor that can be placed in a blood vessel to measure pH and detect abnormal conditions that may indicate disease, such as tumor growth.
Oliver G. Schmidt, head of the research team, said: "It is very encouraging to see how new, extremely flexible, and adaptive microelectronics can make it into the miniaturized world of biological systems."