High Resolution Gold on Carbon Test, Electron Microscopy Sciences

The gold on carbon specimen is the resolution test of SE and BSE imaging and also for chemical mapping in high-resolution systems such as an Auger scanning instrument.

Gold particles range from 5 to 150 nm approximately
Each test specimen has a square grid pattern with large crystals in the center of each square
Very fine crystals at the edges of each grid

Thus medium and high resolution gap tests are performed on the same specimen. Meantime, the larger crystals show facets which allow an assessment of the gray level reproduction available at high resolution.

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