溶剂组成对非DLVO力和氧化物纳米粒子定向附着的作用
Lili Liu1, Sakshi Yadav Schmid1,2, Zhaojie Feng2
1Pacific Northwest National Laboratory, Richland, Washington 99354, United States.
ACS nano
|June 18, 2024
概括
氧化纳米晶体的定向附着 (OA) 是由非DLVO力驱动的,受溶剂特性的影响. 了解这些相互作用是预测粒子聚合和附着的关键.
科学领域:
- 材料科学 材料科学 材料科学
- 合体和表面化学
- 纳米技术 纳米技术
背景情况:
- 传统的德贾古恩-兰多-维维-奥弗比克 (DLVO) 理论不充分描述纳米粒子相互作用.
- 晶体结构和界面溶液结构的原子细节对于定向附着 (OA) 是至关重要的.
研究的目的:
- 研究溶剂对纳米粒子相互作用和OA机制的影响.
- 在氧化物 (ZnO) 纳米晶体附着物中探索非德贾金-兰多-维维-奥弗比克 (非DLVO) 力量.
主要方法:
- 使用现场传输电子显微镜 (TEM) 来成像中ZnO纳米晶体.
- 进行了朗格温动力学模拟,以模拟不同溶剂中的粒子相互作用.
- 进行了原子力显微镜 (AFM) 用ZnO涂层探头测量短距离相互作用.
主要成果:
- 在二烯中观察到ZnO纳米晶体之间的远距离吸引力,归因于双极-双极力和扭矩.
- 模拟表明,与甲醇相比,托卢烯的相互作用更强.
- 发现水中的排斥性溶解力比乙醇或甲醇更强,这是由于结合.
结论:
- 非DLVO力,包括双极-双极和溶解力,显著影响纳米粒子相互作用和OA.
- 溶剂特性对短距离和长距离的力量都有关键影响.
- 结果强调需要一个综合框架,包括非DLVO力来预测粒子聚合.
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