Siberian scientists create 0.3-nanometer reference bar
6 Mar '12
Siberian physicists have created a set of reference bars, with the smallest one of 0.3 nanometers in size, Telestantsiya Mir reports.
The scientists of Novosibirsk-based Institute of Semiconductor Physics of the Siberian Branch of the Russian Academy of Sciences have presented a set of six nanometer reference bars. The Federal Agency on Technical Regulation and Metrology (Rosstandard) has approved the bars as measurement means. Earlier German scientists created a nanometer reference bar, which is 20 nanometers long.
In order and prior to creating the nanometer bars the scientists had developed a technology of obtaining silicon crystals with ideally even surface.
Sergey Sitnikov, junior scientist of the lab of nanodiagnostics and nanolithography of the Institute of Semiconductor Physics of the SB RAS, “The surface can be used as a mirror. The mirror enabled to measure height of the 0.3-nanometer atomic scale through optical interference measurement.”
The nanometer bars can’t be detected by a human eye or TV camera, and can only be seen through a powerful microscope.
Dmitry Scheglov, a scientist in the lab of nanodiagnostics and nanolithography of the Institute of Semiconductor Physics of the SB RAS, “These bars enable to caliber and test atomic-force and interference microscope in meter range from 0.3 to 30 nanometers. This way we have encompassed full range used in nanotechnologies.”