Study on the Stability of Silicon nanopowder colloidal solution

• Main Authors: Yang-Chih, Lin, 林揚智
• Other Authors: Chin-Hsin J. Liu
• Format: Others
• Language: zh-TW
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/43406584861068524197

碩士 === 國立臺灣科技大學 === 化學工程系 === 98 === Silicon nanopowder colloidal solution has been investigated in terms of the silicon particle size, dispersion and zeta-potential in various organic solvents. In this study, we conducted sedimentation experiment and concentration measurement after centrifugation of the prepared solution to give us an initial assessment regarding the stability of the nanopowders in the solution. Using the Zetasizer3000HS, the hydrodynamic diameter (Z-average) and zeta-potential of the chosen solutions were obtained. In measuring the size of the nanopowders in the solution, an additional time-dependent measurement was also done. As such, a relationship was correlated between the different measured parameters and the type of solvent in which the colloidal solution remains stable. The study also introduced the concept of Hansen solubility parameters to explain the possible solvent effect on the silicon nanopowder. The stable colloidal solution was then used as ink and coated on an ITO substrate using an ultrasonic-assisted spray coater. Studies were also done on the interaction of the substrate with the nanopowder and an assessment was done on the further modification required to improve film uniformity.