Synthesis of Gold Nanoparticles with Liesegang Phenomenon
Synthesis of Gold Nanoparticles with Liesegang Phenomenon
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利用Liesegang现象合成金纳米粒子
DOI：
10.4164/sptj.56.187
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发表时间：
2019
影响因子：
--
通讯作者：
A. Shioi
中科院分区：
文献类型：
--
作者：
Ken Obayashi;Riho Kayama;Miwako Toda;E. Okita;Daigo Yamamoto;A. Shioi
Liesegang现象在非线性科学领域得到了广泛的实验和理论研究。然而，由于其高度的非线性，对其应用的研究很少。多年来，Liesegang现象产生的颗粒仅限于微溶盐的微粒。在这项研究中，在预期更多的工程应用，这一现象，金纳米粒子的合成扩散到含有还原剂的凝胶金离子。在那个时候，我们调查的扩散条件对粒子形成的影响。结果，我们发现所得颗粒的大小取决于凝胶位置。基于Ostwald熟化原理，建立了离子扩散和粒子生长的数学模型，讨论了粒子的形成机理。
Liesegang phenomenon has been extensively studied experimentally and theoretically in the field of nonlinear science. However, there are few studies for its applications due to the high nonlinearity. The particles produced with the Liesegang phenomenon have been limited to microparticles of sparingly soluble salt for many years. In this study, in anticipation of more engineering application of this phenomenon, gold nanoparticles are synthesized by diffusing gold ions into a gel containing a reductant. At that time, we investigate the influence of diffusion conditions on particle formation. As a result, we found that the size of resultant particles depends on the gel position. Furthermore, we construct mathematical model expressing ion diffusion and particle growth based on Ostwald ripening to discuss the particle formation mechanism.