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Figure 1 | EPJ Techniques and Instrumentation

Figure 1

From: Characterization of a gold coated cantilever surface for biosensing applications

Figure 1

Potential induced adsorption/desorption of chloride ions on different functionalized gold surfaces. Schematics describe the relationship between surface stress change and available surface area. A, a bare and clean gold surface is shown. Chloride ions can freely interact with the whole surface and large surface stress changes are measured. Upon binding of some single-stranded oligonucleotide to the surface B, fewer ions can react with the surface leading to a smaller surface stress change. Once the layer is densely packed on the surface C, the surface stress change vanishes as no ions can reach the surface anymore.

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