Lasers Make Atomic Force Microscope 20 Times More Powerful
Optical Microscopes are more strongly affected by property of light than normal microscopes. Recently, scientists have discovered that Atomic Force Microscopes can be used to look into the nano scale world.
According to Dr. Ben Buchler from the school of Physics and Engineering at Australia National University, the microscope can help calculate the weight of tiny virus that is lighter than a mosquito.
Atomic Force Microscope is a type of Scanning Probe Microscopes, which are used to measure friction, height and magnetism. To get a picture, the raster of Scanning Probe Microscope scans probe which is 500 times thinner than the hair over the specimen and measure the properties of the area. The vulnerable behavior of the probe to the vibrations can cause interference in the measurements of specimen.
It is found that the energy of laser could affect the sensitive measurement. The microscopes' probe could be used only when the laser is on. To overcome the problem, one should switch on and off the laser. One can make measurements when the laser is off. To get accurate final value, the measurements should be repeated during a number of heating and subsequent cooling cycles.
Atomic Force microscopes were invented in the 80s by researchers at the IBM Research-Zurich. The microscopes are greater than optical microscopes and have higher resolution.
According to report of RedOrbit, "Atomic force microscopes achieve extraordinarily sensitivity measurements of microscopic features by scanning a wire probe over a surface".
The laser microscope would prove very beneficial for the scientists, but the nanowire utilized in the microscope is so thin that even the smallest vibration can affect its core construction.
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