Transmission Electron Microscopy Testing (TEM)
The TEM is capable of examining single columns of atoms at magnifications that exceed optical microscopy (OM) by tens of thousands of times.
The TEM is capable of examining single columns of atoms at magnifications that exceed optical microscopy (OM) by tens of thousands of times.
A concentrated beam of electrons passes through a very thin sample. Based on electron density the various areas of the sample interact with the beam differently. The resulting image represents the gradient areas of electron density.
Transmission Electron Microscopy Analysis is a great approach for documenting the phase distribution of copolymers and blends.
Many samples have sufficient contrast in an as-prepared state. However, to obtain sufficient contrast with some specimens, a staining technique is utilized. For example, unsaturated components within a matrix are stained with ruthenium tetroxide. This method will reveal the rubber phase distribution in a polystyrene matrix.
Ultra thin specimens are prepared using a microtome or a cryo microtome on polymer pieces or embedded specimens.
TEM specimens are typically very thin, approximately 0.1 microns in thickness. Specimens are acquired from regions of the sample based on the goal you hope to achieve through TEM testing.
To discuss your specific sample considerations in detail please contact us.
Our experience with Transmission Electron Microscopy Analysis includes: