Nanodispersion behavior in organic solvents of nanodiamonds with surfaces modified by amphiphiles containing fluorocarbon chains of different lengths was investigated for future lubricant applications. Fluorocarbon-modified nanodiamonds exhibit excellent dispersion behavior, specifically in nonpolar solvents. This is a phenomenon that is not seen in hydrocarbon-modified nanoparticles. The reduction in the aggregated particle size in organic solvents is more dependent on the modified chain length than on the modification rate. In addition, the behaviors of these organo-modified nanodiamonds on a water surface were systematically compared. These single-particle layers on the water surface were confirmed to depend on the compression rate. The slower the compression speed, the more homogeneous the single-particle layer formed is. Further, proper lattice spacing and high regularity in this system were achieved by low-speed compression. Good dispersibility in organic solvents was related to a long relaxation time to achieve a stable conformation on the water surface. In other words, it was suggested that nanoparticles with better dispersibility in organic solvent require a longer relaxation time for rearrangement in the air/water interface field.

研究了纳米金刚石在有机溶剂中的纳米分散行为，该纳米金刚石的表面被含有不同长度碳氟化合物链的两亲物改性，用于未来的润滑剂应用。氟碳改性的纳米金刚石具有出色的分散性能，特别是在非极性溶剂中。这是在烃改性的纳米颗粒中未发现的现象。有机溶剂中聚集粒度的减小更多地取决于改性的链长，而不是取决于改性率。另外，系统地比较了这些有机改性的纳米金刚石在水表面上的行为。确认在水表面上的这些单颗粒层取决于压缩率。压缩速度越慢，形成的单颗粒层越均匀。进一步，通过低速压缩，可以在该系统中获得适当的晶格间距和高规则性。在有机溶剂中的良好分散性与较长的松弛时间有关，以在水表面实现稳定的构象。换句话说，表明在有机溶剂中具有更好分散性的纳米颗粒需要更长的弛豫时间以在空气/水界面领域进行重排。