Russo Luigi, Colangelo Francesco, Cioffi Raffaele, Rea Ilaria, Stefano Luca De
Dipartimento per le Tecnologie, Università degli Studi di Napoli "Parthenope", Centro Direzionale Is. C4 - 80143 Napoli, Italy.
CNR-IMM, Istituto per la Microelettronica e Microsistemi-Unità di Napoli, Via P. Castellino 111, 80131 Napoli, Italy.
Materials (Basel). 2011 Jun 7;4(6):1023-1033. doi: 10.3390/ma4061023.
Porous silicon samples have been reduced in nanometric particles by a well known industrial mechanical process, the ball grinding in a planetary mill; the process has been extended to crystalline silicon for comparison purposes. The silicon nanoparticles have been studied by X-ray diffraction, infrared spectroscopy, gas porosimetry and transmission electron microscopy. We have estimated crystallites size from about 50 nm for silicon to 12 nm for porous silicon. The specific surface area of the powders analyzed ranges between 100 m²/g to 29 m²/g depending on the milling time, ranging from 1 to 20 h. Electron microscopy confirms the nanometric size of the particles and reveals a porous structure in the powders obtained by porous silicon samples which has been preserved by the fabrication conditions. Chemical functionalization during the milling process by a siloxane compound has also been demonstrated.
多孔硅样品通过一种众所周知的工业机械工艺——在行星式球磨机中进行球磨，被还原成纳米颗粒；为作比较，该工艺已扩展至晶体硅。已通过X射线衍射、红外光谱、气体孔隙率测定法和透射电子显微镜对硅纳米颗粒进行了研究。我们估计，晶体尺寸从硅的约50纳米到多孔硅的12纳米不等。根据研磨时间（从1小时到20小时不等），所分析粉末的比表面积在100平方米/克至29平方米/克之间。电子显微镜证实了颗粒的纳米尺寸，并揭示了由多孔硅样品获得的粉末中的多孔结构，该结构已被制备条件保存下来。还证明了在研磨过程中通过硅氧烷化合物进行的化学官能化。
