在充电的纳米粒子悬浮中,多元诱导的粒子间吸引和重新进入的液态-液态相分离
1Solid State Physics Division, Bhabha Atomic Research Centre, Mumbai 400085, India.
Langmuir : the ACS journal of surfaces and colloids
|June 3, 2023
概括
带电的纳米粒子在与非离子表面活性剂相互作用时表现出液态-液态相分离. 这种由疏水相互作用驱动的热反应行为,显示出与温度增加的独特的重新进入相位过渡.
科学领域:
- 合体和表面科学科学
- 材料科学 材料科学 材料科学
- 软物质物理学 软物质物理学
背景情况:
- 纳米颗粒的表面特性对于稳定性和应用至关重要.
- 控制粒子间力量是理解悬浮中的纳米粒子行为的关键.
研究的目的:
- 研究一种非离子表面活性剂 (Pluronic P123) 对充电的纳米粒子悬浮物的粒子间相互作用和相位行为的影响.
- 探索非DLVO力,特别是固态和疏水效应在驱动相隔离中的作用.
主要方法:
- 动态光散射 (DLS) 是一种
- 微角中子散射 (SANS) 是一种微角中子散射.
- 测量泽塔潜力的测量结果
- 风病学研究 风病学研究
- 光光谱学是一种光谱学.
主要成果:
- 负电荷的二氧化纳米粒子悬浮液 (Ludox TM-40) 在Pluronic P123.3的存在下显示出液体-液体相分离.
- 阶段分离具有热反应性,随着温度的增加,表现出较低的固态温度和重新进入的行为 (一相到二相和回归到一相).
- 泽塔潜力表明,通过Pluronic吸附,表面电荷的部分缓解,而SANS则表明,细胞层之间的疏水相互作用诱导了吸引力.
结论:
- 非离子表面活性剂可以通过疏水性相互作用在带电纳米粒子系统中诱导有吸引力的粒子间力.
- 这导致纳米粒子悬浮中可调节的相位行为,包括重新进入的相位过渡.
- 这些发现为设计和控制先进应用的纳米粒子组装提供了新的见解.
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