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Microscopy and Surface Analysis 2

Chia sẻ: Đặng Quang Dũng | Ngày: | Loại File: PDF | Số trang:23

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Surface contamination: – The obvious contamination/alteration of surfaces that can be the result of less-than careful sample preparation – Solid surfaces can adsorb gases: At 10-6 torr, a complete monolayer of a gas (e.g. CO) takes just 3 seconds to form. At 10-8 torr, monolayer formation takes 1 hour. – Most studies are conducted under vaccuum – although there are newer methods that don’t require this.

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