公开(公告)号：US20030072874A1

公开(公告)日：2003-04-17

申请号：US09977838

申请日：2001-10-15

Applicant: KANSAS STATE UNIVERSITY RESEARCH FOUNDATION

Inventor： Kenneth J. Klabunde ,  Savka Stoeva ,  Christopher Sorensen

IPC: C09K003/00

CPC classification number: B82Y30/00 ,  B01J13/0043 ,  Y10S977/773 ,  Y10S977/896

Abstract: A method of forming ligated nanoparticles of the formula Y(Z)x, where Y is a nanoparticle selected from the group consisting of elemental metals having atomic numbers ranging from 21-34, 39-52, 57-83 and 89-102, all inclusive, the halides, oxides and sulfides of such metals, and the alkali metal and alkaline earth metal halides, and Z represents ligand moieties such as the alkyl thiols. In the method, a first colloidal dispersion is formed made up of nanoparticles solvated in a molar excess of a first solvent (preferably a ketone such as acetone), a second solvent different than the first solvent (preferably an organic aryl solvent such as toluene) and a quantity of ligand moieties; the first solvent is then removed under vacuum and the ligand moieties ligate to the nanoparticles to give a second colloidal dispersion of the ligated nanoparticles solvated in the second solvent. If substantially monodispersed nanoparticles are desired, the second dispersion is subjected to a digestive ripening process. Upon drying, the ligated nanoparticles may form a three-dimensional superlattice structure.

Abstract translation: 形成式Y（Z）x的连接纳米颗粒的方法，其中Y是选自原子序数范围为21-34,39-52,57-83和89-102的元素的纳米颗粒，全部 这些金属的卤化物，氧化物和硫化物以及碱金属和碱土金属卤化物，Z表示配体部分，例如烷基硫醇。 在该方法中，由摩尔过量的第一溶剂（优选酮如丙酮），不同于第一溶剂的第二溶剂（优选有机芳基溶剂如甲苯）溶剂化的纳米颗粒形成第一胶态分散体， 和一定数量的配体部分; 然后在真空下除去第一溶剂，并将配体部分连接到纳米颗粒上，得到在第二溶剂中溶剂化的连接的纳米颗粒的第二胶体分散体。 如果需要基本上单分散的纳米颗粒，则将第二分散体进行消化成熟过程。 干燥后，连接的纳米颗粒可形成三维超晶格结构。