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纳米(nm)是一种长度单位,1纳米=1毫微米=10-9米。分析研究表明1纳米相当于45个原子串在一起的长度,更直观地讲,头发丝的直径就有七八万纳米。因此,纳米世界是一个肉眼看不到的相当微观的世界。在过去,纳米材料是人们可望而不可及的。因为人眼的最高视力只能分辨出1/5nm的微小物体。自从联邦德国恩斯特·鲁斯卡教授设计的第一架电子显微镜(1939年)问世以后,又由瑞士的海因里希·罗雷尔博士和联邦德国的格尔德·宾尼格博士的研制,最后,在1982年美国制造出了
Nanometer (nm) is a unit of length, 1 nanometer = 1 nanometer = 10-9 meters. Analytical studies have shown that 1 nanometer is equivalent to the length of 45 atoms strung together, and more intuitively speaking, the diameter of hair filaments is 780,000 nanometers. Therefore, the nanoworld is a rather microscopic world that is invisible to the naked eye. In the past, nanomaterials were elusive. Because the highest visual acuity of human eyes can only distinguish 1/5nm fine objects. Since the first electron microscope (1939) designed by Professor Ernest Ruska of the Federal Republic of Germany, Dr. Heinrich Laurel of Switzerland and Dr. Geld Binig of the Federal Republic of Germany The development was finally made in the United States in 1982.