In Situ Real-Time Radiographic Study of Thin Film Formation Inside Rotating Hollow Spheres
详细信息 查看全文
- 作者：Tom Braun ; Christopher C. Walton ; Christoph Dawedeit ; Monika M. Biener ; Sung Ho Kim ; Trevor M. Willey ; Xianghui Xiao ; Anthony van Buuren ; Alex V. Hamza ; Juergen Biener
- 刊名：ACS Applied Materials & Interfaces
- 出版年：2016
- 出版时间：February 3, 2016
- 年：2016
- 卷：8
- 期：4
- 页码：2600-2606
- 全文大小：450K
- ISSN：1944-8252
文摘
Hollow spheres with uniform coatings on the inner surface have applications in optical devices, time- or site-controlled drug release, heat storage devices, and target fabrication for inertial confinement fusion experiments. The fabrication of uniform coatings, which is often critical for the application performance, requires precise understanding and control over the coating process and its parameters. Here, we report on in situ real-time radiography experiments that provide critical spatiotemporal information about the distribution of fluids inside hollow spheres during uniaxial rotation. Image analysis and computer fluid dynamics simulations were used to explore the effect of liquid viscosity and rotational velocity on the film uniformity. The data were then used to demonstrate the fabrication of uniform sol–gel chemistry derived porous polymer films inside 2 mm inner diameter diamond shells.