How do the DNA-based sensors work?

The DNA-based sensors use the DNA molecule as the sensor. The idea is that the DNA molecule or its head can hover around the layer and act like the stylus of an old-time LP player. In some versions of DNA sensors, there could be an iron bite at the end of the molecule. There is a possibility to use that iron bite to measure the magnetic field. There is the possibility that the radio waves are pointed to a certain target through that iron stylus.

The radio (maser) wave will shoot to the iron that drives those radio waves to a certain target. The system can observe the reflection. But if the iron bite slides above the magnetized or electrically stressed layer the system can measure the electricity in that stylus. Or the system can measure the position of the DNA relative to the level. That allows operators to see the differences in the shape of the layer.

When the layer goes farther the magnetic effect on DNA is turning weaker. And that affects the position of the DNA. The idea is similar to the magnet that is connected to the libra. When the magnetic layer is below it the distance to the magnetic layer affects the pulling force of the magnet.

There is a possibility to observe the differences in the length and position of the DNA molecules by using the laser microscope that can measure the changes in the forms of that molecule. In some other versions of DNA-based sensors, The DNA will position around the measurable object. The DNA tweezers are based on the idea that the electricity will pull the last base pairs of the DNA around the object. In that kind of nanotechnical system, electricity will conduct to the object that must transport.

In the measuring system the DNA position over the measurable object. Then the DNA molecule would rotate around. And the laser microscope measures the changes in the position of the last base pairs of the molecule. In the last version the ion will be shot through the DNA molecule vertically and the effects of that thing can notice by searching the effect of that thing on the DNA.

The idea is similar to fullerene nanotube-based sensors. In those sensors, the laser light will shoot sideways through the nanotube. When the particle moves through that tube. The sensor detects its shape by using laser light. And that kind of system can find many new things from the world of subatomic and atomic worlds.

Image and sources:

https://www.scientiststudy.com/2022/04/dna-based-detector-could-precisely.html

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