物理化学学报 >> 2016, Vol. 32 >> Issue (10): 2518-2522.doi: 10.3866/PKU.WHXB201605272

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表面活性剂对树形银纳米结构影响的蒙特-卡洛模拟

王元元,徐群星,谢华清*(),吴子华,邢姣娇   

  • 收稿日期:2016-03-30 发布日期:2016-09-30
  • 通讯作者: 谢华清 E-mail:hqxie@sspu.edu.cn
  • 基金资助:
    国家自然科学基金(51406111);上海市自然科学基金(14ZR1417000);上海教委科研创新项目(15ZZ100);和上海市青年东方学者资助项目(QD2015052)

Monte-Carlo Simulations of the Effect of Surfactant on the Growth of Silver Dendritic Nanostructures

Yuan-Yuan WANG,Qun-Xing XU,Hua-Qing XIE*(),Zi-Hua WU,Jiao-Jiao XING   

  • Received:2016-03-30 Published:2016-09-30
  • Contact: Hua-Qing XIE E-mail:hqxie@sspu.edu.cn
  • Supported by:
    The project was supported by the National Natural Science Foundation of China(51406111);Shanghai Natural Science Foundation, China(14ZR1417000);Scientific Innovation Project of Shanghai Education Committee, China(15ZZ100);and Young Eastern Scholar of Shanghai, China(QD2015052)

摘要:

采用偏压受限扩散聚集模型研究溶液中银树形纳米结构的生长。模拟中,在二维正方形格子中引入了等腰直角三角形粒子进行模拟,同时运用不同的粘贴概率来描述表面活性剂的效果。模拟结果表明树形纳米结构随着偏压的增大而变得更密。表面活性剂的加入使得树形纳米结构变得更加对称和规则。更进一步,当表面活性剂的效果足够强且外加偏压很小的时候,银纳米颗粒聚集成了银纳米片。模拟结果有利于定性解释相关的实验结果。

关键词: 蒙特-卡洛模拟, 树形银纳米结构, 表面活性剂

Abstract:

The bias diffusion-limited aggregation model is used to study the growth of silver dendritic nanostructures in solution. In the simulation, right-angled isosceles triangle particles are introduced in twodimensional square grids and the sticking possibilities of different particle sides are introduced to describe the effect of the surfactant. Our simulation results show that the dendritic nanostructures become denser with increasing bias voltage. It is also found that the dendritic nanostructures become much more symmetrical and regular when the surfactant is applied. Furthermore, if the effect of the surfactant is strong enough and the bias voltage is small, the branches of the nanostructures are assembled into silver plates. Our simulation results are helpful to explain the experimental results qualitatively.

Key words: Monte-Carlo simulation, Silver dendritic nanostructure, Surfactant

MSC2000: 

  • O647.1