Provided are a nanoparticle/dispersant complex having excellent dispersibility and long-term stability in a dispersion medium, a production method therefor, and a nanoparticle dispersion liquid and a nanoparticle/matrix-material complex which are colorless and transparent even at high concentrations. In the nanoparticle/dispersant complex, a nanoparticle is covered with a dispersant containing a heterocyclic cationic group and one of an oxo acid group containing a sulfur atom or a phosphorus atom and an anion moiety of the oxo acid group; in the nanoparticle dispersion liquid, the nanoparticle/dispersant complex is dispersed into a dispersion medium; in the nanoparticle/matrix-material complex, the nanoparticle/dispersant complex is dispersed into a matrix material; and the production method for a nanoparticle/dispersant complex comprises forming, under a presence of the dispersant, a nanoparticle covered with the dispersant from a nanoparticle precursor.
提供了一种在分散介质中具有优异分散性和长期稳定性的纳米颗粒/分散剂复合物,以及其生产方法,以及即使在高浓度下也是无色透明的纳米颗粒分散液和纳米颗粒/基质材料复合物。在纳米颗粒/分散剂复合物中,纳米颗粒被含有杂环阳离子基团和含有
硫原子或
磷原子的氧酸基团之一以及氧酸基团的阴离子基团的分散剂覆盖;在纳米颗粒分散液中,纳米颗粒/分散剂复合物分散在分散介质中;在纳米颗粒/基质材料复合物中,纳米颗粒/分散剂复合物分散在基质材料中;纳米颗粒/分散剂复合物的生产方法包括在分散剂存在下,从纳米颗粒前体形成被分散剂覆盖的纳米颗粒。