A gold coating is a very thin film of gold deposited onto a supporting substrate. This serves as a very useful substrate in the life science academia & industrial markets.
- Typical characteristics of gold surfaces include:
- Good resistance to oxidation
- Inert surface for use with biological experimentation
- Good conductor of electricity
- Ultra smooth surfaces can be prepared
- Easily forms thiol chemistry self-assembled monolayers (SAM)
Glossary of Terms
- Nanometer (nm): 1×10-9 m
- Ångström (Å): 0.1 nm
- E-beam Evaporation: A physical vapor deposition technique used for thin film coatings.
- Adhesion Layer: A thin layer deposited for improving the adhesion of gold on to the substrate (material to be coated).
- Roughness: A measure of surface smoothness.
- Grain Size: The size of gold grains present on the surface. Grain size has an effect on the roughness of the gold surface.
- Self Assembled Monolayers(SAM): Surfaces consisting of a single layer of molecules on a substrate, prepared by adding a solution of the desired molecule onto the substrate surface and washing off the excess.
Physical vapor deposition (PVD) techniques are commonly used for depositing metal thin films onto a surface.