A team of chemists from the Imperial College of London created a nanoscale tweezers, which pulls away with the electrical field and holds the desired welfare, allowing you to extract different elements of living cells without killing them.
The device is a rod with a glass needle-like tip with a diameter of less than 100 nm and located on the sides of two electrodes. When the voltage is applied to the tweezers, directly near the electrodes is created a powerful electric field, with which you can attract and hold the necessary molecules at a distance of about 300 nm from the edge of the needle. The desired biomaterial is actually stuck in a trap until the voltage turns off.
Operating the device with extreme accuracy, researchers can make the biopsy of individual cells without killing them. The British team has already conducted a number of successful tests, during which the DNA molecules from bone cancer cells were extracted, mRNA from the cytoplasm of arterial cells, as well as mitochondria from brain nerve cells. In some cases, the samples were taken twice with a gap in one hour, after the preservation of the vital activity of cells after the fence was confirmed.
According to scientists, Nanopintset is a very important tool and opens up new opportunities in the field of molecular analysis. For example, you can take samples of the same cells throughout your life to explore mutations in them or reaction to drugs.
Another team of researchers invented