POLY 630 |
| Electron microscope is a powerful tool for structural imaging and chemical analysis of an object on a wide range of scale from millimeters to nanometers. In the current nanotechnology era, it is often used for high resolution imaging in both materials and bio-science. Soft (electron beam sensitive) materials such as polymers are not exception and usually observed in a cryogenic condition to preserve their real structures as much as possible. Once a specimen is prepared for the electron microscopy, there are many techniques available for structural characterization. Among the techniques, the electron energy loss spectroscopy may be applied to filter the elastic or inelastic electrons by selecting an appropriate region in the energy dimension to observe the unique structures in higher contrast. Chemical structures may be also visualized in 2D mapping. Applications demonstrated with a modern TEM are introduced. We also introduce a tomography system that is very effective for observing polymer structure. |
|
Imaging Techniques for the Characterization of Polymers and Polymer-Derived Materials
8:00 AM-12:35 PM, Thursday, August 23, 2007 Westin Boston Waterfront -- Otis, Oral
Division of Polymer Chemistry |