Size distribution and surface characteristics of silicon nanoparticles
Size distribution and surface characteristics of silicon nanoparticles
复制标题
硅纳米粒子的尺寸分布和表面特征
DOI：
10.1107/s0021889809011947
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发表时间：
2009
影响因子：
6.1
通讯作者：
M. Härting
中科院分区：
文献类型：
--
作者：
D. Britton;E. A. Odo;G. Gonfa;E. O. Jonah;M. Härting
用小角X射线散射(SAXS)和透射电子显微镜研究了纳米硅颗粒的尺寸分布和形貌。两种方法的结果之间建立了定量的一致性。表面特征以及尺寸分布被发现与用于制备含有纳米颗粒的印刷层的粘结剂材料的选择无关。激光裂解硅烷制备的本征硅纳米颗粒具有窄的、有效的单分散、尺寸分布和近似球形的特点。SAXS测量表明，颗粒具有规则的几何形状和光滑的表面。然而，在粒子的表面有一个很薄的无序区域。由体硅研磨产生的颗粒具有表面分形特征和由于研磨过程而产生的高分散性，其中，颗粒被研磨到更小的尺寸或更长的时间时变得更光滑。类似地，通过较长时间的球磨来减小尺寸分散度，而不是中位数尺寸
The size distribution and morphology of silicon nanoparticles have been studied using small-angle X-ray scattering (SAXS) and transmission electron microscopy. Quantitative agreement was established between the results of the two methods. The surface characteristics, as well as the size distribution, were found to be independent of the choice of binder material used to prepare printed layers containing the nanoparticles. Intrinsic silicon nanoparticles, produced by laser pyrolysis of silane, have been shown to have a narrow, effectively monodisperse, size distribution and to be roughly spherical in shape. SAXS measurements indicate that the particles have a regular geometry and a smooth surface. There is, however, a thin disordered region at the surface of the particles. Particles produced by milling of bulk silicon have surface fractal characteristics and a high dispersivity resulting from the milling process, in which the particles become smoother as they are milled to smaller size or for longer periods. The size dispersion, but not the median size, is similarly reduced by milling for longer periods