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SCANNING TUNNELING MICROSCOPE

SCANNING TUNNELING MICROSCOPE

SCANNING TUNNELING MICROSCOPE

SCANNING TUNNELING MICROSCOPE

SCANNING TUNNELING MICROSCOPE

SCANNING TUNNELING MICROSCOPE

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STM is one of the most basic and important tools in the SPM family formicro and nano detection and research. Its working principle is based on thetunneling effect between the microprobe (needle) and the sample and thetunneling current. When a very sharp needle approaches the sample surface witha certain bias pressure in the longitudinal direction to a few nanometers oreven smaller interval S, a tunneling current It is generated between the atomsat the tip of the needle and the atoms on the sample surface. According to thetheory of tunneling effect of quantum mechanics, there is a negativeexponential relationship between It and the interval S. The size of theinterval S can be detected by detecting the magnitude of the tunneling currentIt. When the needle scans the sample in the transverse direction, thethree-dimensional micro and nano morphology of the sample surface can beobtained according to the change of the tunneling current.


The unique feature of our STM is itshorizontal STM probe structure. It lowers the overall center of gravity of theprobe and eliminates vertical creep of the coarse and fine tuning approximationmechanisms. It is also equipped with a USB video microscope monitoring system,which allows visualization of the microprobe operation and feeding process tobetter and more intuitively meet the user's operational requirements. The newSTM probe and instrument performance is more stable and superior.



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