期刊
SMALL
卷 18, 期 46, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/smll.202204621
关键词
diffusion-limited agglomeration; dynamic light scattering; microgravity; nanoparticles; reaction-limited agglomeration
类别
资金
- German Aerospace Center (DLR) [50WM1763]
- Projekt DEAL
Gravity can affect the agglomeration of nanoparticles by changing convection and sedimentation. The study found that the agglomeration of gold nanoparticles was more pronounced in microgravity, suggesting a process closer to the diffusion limit.
Gravity can affect the agglomeration of nanoparticles by changing convection and sedimentation. The temperature-induced agglomeration of hexadecanethiol-capped gold nanoparticles in microgravity (mu g) is studied at the ZARM (Center of Applied Space Technology and Microgravity) drop tower and compared to their agglomeration on the ground (1 g). Nonpolar nanoparticles with a hydrodynamic diameter of 13 nm are dispersed in tetradecane, rapidly cooled from 70 to 10 degrees C to induce agglomeration, and observed by dynamic light scattering at a time resolution of 1 s. The mean hydrodynamic diameters of the agglomerates formed after 8 s in microgravity are 3 times (for low initial concentrations) to 5 times (at high initial concentrations) larger than on the ground. The observations are consistent with an agglomeration process that is closer to the reaction limit on thground and closer to the diffusion limit in microgravity.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据