在带电纳米粒子和水性电解质之间增强热流
Reza Rabani1, Mohammad Hassan Saidi2, Ali Rajabpour3
1Department of Mechanical Engineering, Karaj Branch, Islamic Azad University, Karaj 31499-68111, Iran.
Langmuir : the ACS journal of surfaces and colloids
|October 22, 2023
概括
表面电荷显著提高了金纳米粒子和电解质溶液之间的热传递,增加了三倍的接口导热. 这一发现对于癌症治疗和太阳能转换等应用至关重要.
科学领域:
- 接口的热传递 接口的热传递
- 纳米粒子科学 科学 纳米粒子科学
- 物理化学 物理化学
背景情况:
- 在纳米粒子-电解质接口的热传递对于癌症治疗,纳米流体和太阳能等应用至关重要.
- 表面电荷和溶解离子对这种传热的影响在很大程度上仍未被探索.
研究的目的:
- 调查表面电荷和电解质离子对金纳米颗粒接口导热率的影响.
- 为了量化由于纳米粒子表面电荷而导致的热传递增强.
主要方法:
- 利用平衡分子动力学模拟来计算接口的热导电.
- 在电解质溶液中浸泡模拟的含水性和疏水性充电黄金纳米粒子.
主要成果:
- 与未充电的纳米粒子相比,在纳米粒子表面电荷为+320mC/m2的情况下,观察到卡皮扎导电量的三倍增加.
- 这种增强在很大程度上独立于表面的湿透性,电荷分布和盐度.
- 开发了一个主曲线,将Kapitza导电强化与表面电荷密度联系起来.
结论:
- 增加的卡皮兹导电性归因于水密度分布的变化和在带电纳米粒子表面附近的对电离子积累.
- 液体和带电纳米粒子之间的增强库伦比相互作用有助于改善热传递.
- 提供了关于离子在电气化表面的传热现象中的作用的见解.
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