Revealed: Acceleration Technologies of Microscopes
In the history of modern instrument development, microscopy technology has been rapidly advancing with the progress of human technology, and scientific research and material development have also been pushed to unprecedented small worlds with the invention of new microscopy technologies. Atomic force microscopy can be applied in various fields of research, including polymer materials, optoelectronic materials, nanomaterials, biomaterials, etc. In addition, its probes can also serve as tools for manipulating surface atoms or molecules, providing a broader space for scientific research and imagination.
According to reports, Cornell University physicist Keith Schwab has used a measurement method in nanoelectronics to create a scanning tunneling microscope that can capture images of individual atoms on a surface at a speed at least 100 times faster than existing microscopes. Scanning tunneling microscope can use the ability of quantum tunneling or electron tunneling through obstacles to measure the distance between a needle detector and a conductive surface.
Researchers added an additional radio frequency source and sent a wave into a scanning tunneling microscope through a simple network. They found that they could use the characteristic of reflecting the wave towards the source to detect the resistance of the tunnel junction. This technology is called reflectometer technology, which uses standard cables as high-frequency wave channels and does not slow down due to cable capacity limitations. And a small voltage was applied to the sample, moving the detector to a position only a few angstroms above the surface of the sample.
It should be noted that an ideal scanning tunneling microscope can collect data at a speed as fast as the holding speed of electrons passing through the tunnel, reaching a rate of one gigahertz or a bandwidth of one billion cycles per second. However, a typical scanning tunneling microscope is limited by the capacity of the reading circuit cable or energy storage, and its speed is particularly slow, about 1 kHz or even less.
It is worth mentioning that experts suggest that this technology also has the potential to manufacture atomic level thermometers. They firmly believe that in 10 years, there will be a large number of RF scanning tunneling microscopes that people can use for various great experiments. The invention of atomic force microscopy has given the scientific community unprecedented analytical capabilities, making the detection and manipulation of atoms and molecules on material surfaces no longer just a dream.
