Abstract

Nanodiamonds combine unique mechanical, thermodynamic and optical properties of diamond with the peculiarities of colloidal dimensions and wide possibilities of chemical modification of their surface. Of particular practical interest is the presence of a branched porous structure inside detonation nanodiamond agglutinates in powders. Application of moderate (up to 1.5 GPa) static pressures allowed us to separate the contributions to small-angle scattering from micro- and nanosized pores. In continuation of the previous studies, the given research shows the possibilities of controlling the fractal structure of the porous system at the nanoscale by applying static pressure. Thus, the partial pore recombination in the pressure range covered leads to the formation of linear pores, in contrast to the branched system characteristic for the initial industrial samples. This modification can have a wide practical impact associated with the loading of anisotropic additives.

摘要

纳米金刚石结合了金刚石独特的机械、热力学和光学特性，以及胶体尺寸的特性和对其表面进行化学改性的广泛可能性。特别具有实际意义的是在粉末中的爆轰纳米金刚石凝集物中存在支化的多孔结构。中等（高达 1.5 GPa）静压的应用使我们能够将小角度散射的贡献与微米级和纳米级孔隙分开。作为先前研究的延续，给定的研究表明通过施加静压控制纳米级多孔系统的分形结构的可能性。因此，在所覆盖的压力范围内的部分孔隙重组导致线性孔隙的形成，与初始工业样品的支化系统特征相反。这种修改可以对各向异性添加剂的加载产生广泛的实际影响。