A cell for in situ observation of self-assembled nanostructured materials in high-pressure fluids, including supercritical carbon dioxide, has been constructed and tested. The compact cell can be used for simultaneous small-angle x-ray scattering, laser light scattering, visual observation and some other types of spectroscopic measurements. The light scattering plane is normal to the x-ray scattering plane with the optical axis and the x-ray axis being perpendicular to each other. The scattering is detected at the intersection of the light and x-ray beams and thus one effectively probes the same scattering volume. Some preliminary experimental results for the micellar self-assembly of a fluorinated block copolymers in supercritical carbon dioxide are presented.
Revised: December 6, 2002 |
Published: June 1, 2001
Citation
Koga T., S. Zhou, B. Chu, J.L. Fulton, S. Yang, C. Ober, and B. Erman. 2001.High-Pressure Cell for Simultaneous Small-Angle X-ray Scattering and Laser Light Scattering Measurements.Review of Scientific Instruments 72, no. 6:2679-2685.PNNL-SA-33787.