A Model for Simultaneous Homogeneous and Heterogeneous Nucleation in the Case of Slow Reaction Rate

✍ Scribed by Toshiyuki Nomura; Yasuo Kousaka; Manuel Alonso; Masao Fukunaga; Takeshi Satoh

• Publisher: Elsevier Science
• Year: 2000
• Tongue: English
• Weight: 88 KB
• Volume: 221
• Category: Article
• ISSN: 0021-9797
• DOI: 10.1006/jcis.1999.6588

✦ Synopsis

Our previous model for simultaneous homogeneous and heterogeneous nucleation, which was successfully tested for silver particle generation by a chemical reduction method, is extended to the case of slow reaction rate. Nucleation in a system containing seed particles in the case where the reaction rate is slow occurs according to the following rule: homogeneous nucleation is predominant when n p /n * 0 > 1 (n p is the seed number concentration, and n * 0 the number concentration of homogeneously nucleated particles without seed particles), and heterogeneous nucleation is predominant when n p /n * 0 < 1. This theoretical prediction is in good agreement with the experimental results obtained for zinc sulfide particles generated by homogeneous precipitation.