自从十九世纪六十年代胶体化学建立以来,科学家们一直在对处于1—100nm范围内的颗粒进行研究.然而只是在最近的25年中,人们的研究才得以深入到单个颗粒,并发现这些颗粒具有与大大小小的原子或分子集团不同的性质.它有着广泛的应用前景,例如可用作催化剂、过滤器、光吸收体、医 Scientists have been studying particles in the 1-100 nm range since the colloidal chemistry was established in the 1860s, but only in the last 25 years have people’s studies been able to drill into individual particles and find that Particles have different properties from large and small groups of atoms or molecules. It has a wide range of applications, for example, as a catalyst, a filter, a light absorber, a medical