Forwarded from Khajiit's Library of Facts
A scanning tunneling microscope is a type of microscope used to image surfaces with atomic resolution. Invented in 1981, the microscope makes use of a probe with a very small tip that is brough near the surface to me imaged, but without touching it. A small voltage different is applied to the tip and the surface.
Because of the quantum tunneling effect, electrons will jump across the gap between the surface and the tip. This tunneling current depends on many variables, among them, the shape and position of the atoms on the surface. The probe is moves across the surface using extremely precise piezoelectric actuators to scan it. Allows the molecules and the atoms themselves that compose the surface being imaged.
Because of the quantum tunneling effect, electrons will jump across the gap between the surface and the tip. This tunneling current depends on many variables, among them, the shape and position of the atoms on the surface. The probe is moves across the surface using extremely precise piezoelectric actuators to scan it. Allows the molecules and the atoms themselves that compose the surface being imaged.
Forwarded from Khajiit's Library of Facts
This type of microscope can achieve a resolution of less than 0.1 nm. Allowing the direct imaging of atoms and molecules. For instance, this image showing a sheet of graphene.
Forwarded from Khajiit's Library of Facts
Or this image, that shows a scanning tunneling microscope image of a DNA molecule. Allowing a clear view of the DNA double helix structure. The second image shows that the microscope can also directly read the base pairs in the DNA strands, with the tunneling current highlighting the Guanine (G) bases.
Forwarded from Pepemedia 🇺🇦🏳️🌈
Предлагаю соседним мемным каналам начать мем-революцию. Давайте отрезать вот эту абсолютно пустую и бессмысленную нашлепку а-ля "АПСАЛЮТНА НИКТО:", которая не делает мемы смешнее ни на грамм. Society has progressed past the need of obsolete post- layers. Fuck em.