A novel embedding composition for the evaluation of the internal structure of carbon materials using electron microscopy.

The image contrast obtained in electron microscopy depends on the atomic number of the sample. Therefore, obtaining a clear contrast is challenging when samples composed of light elements (carbon materials and polymers) are embedded in the resin. Herein, a newly developed embedding composition exhibiting low viscosity and high electron density is reported, which can be solidified using physical or chemical methods. When used for carbon materials, this embedding composition allows clear microscopic observation with higher contrast compared to conventional resin embedding. Furthermore, details of the observation of samples such as graphite and carbon black using this embedding composition are reported.