like centimeters, decimeters and meters, nanometers are units for measuring length. One nanometer is equal to one billionth of a meter. Putting a nanometer object on a ping-pong ball is like putting a ping-pong ball on the earth.

experts explain that "nanometer" means nanometer, which is usually expressed by "nm". In physics, nanometer is the unit of length; One micron is one thousandth of a millimeter, and one nanometer is equal to one thousandth of a micron, which is equivalent to one hundredth of a hair. Its conversion relationship with the length unit meter is: 1 nanometer =1 minus 9 meters. For comparison, if 1 meter is the diameter of the earth, 1 nanometer is about the diameter of a glass bead. The so-called "nanotechnology" is a high-tech science and technology that studies and utilizes the structure, characteristics and interaction of atoms and molecules on the scale of .1~1 nanometers. "Nano-micromanipulation" is an important content of nanotechnology, and its purpose is to move, shape, depict and assemble nano-materials at the nano scale according to people's wishes. Nano-micromanipulation began in the 198s.