You ' re about to brust into tears at any moment and you don ' t even know why 不论在什么时候，你总有想哭的冲动，却不知道为了什么。
2.
4 . the preparation of ddt - modified gold nanoparticles and the dicuss of their optical properties we preparated ddt - modified gold nanoparticles using brust approach . tem showed that ddt - modified gold nanoparticles had a uniform size and could be self - assemblyed to form a two - dimensional superlattice on a certain concentration ; we tried to assembly this nanoparticles to slippery substrate and studied their optical preproperties 4 .十二烷基硫醇( ddt )修饰的金纳米颗粒的制备及对其光学性质的探讨本文采用了brust法制备了硫醇修饰的金纳米颗粒，用电镜进行了表征，表明制出的金纳米颗粒粒径比较均一，而且在浓度相当的情况下，能够通过化学键与范德瓦尔斯力之间的相互作用形成有序结构。
