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S-layer protein-AuNP systems for the colorimetric detection of metal and metalloid ions in water

Jung, J. ; Lakatos, Mathias ; Bengs, S. ; Matys, S. ; Raff, J. ; Blüher, A. ; Cuniberti, G.

In: Colloids and Surfaces B: Biointerfaces, 2019, vol. 183, p. 110284

Bacterial surface layer proteins (S-layer) possess unique binding properties for metal ions. By combining the binding capability of S-layer proteins with the optical properties of gold nanoparticles (AuNP), namely plasmonic resonance, a colorimetric detection system for metal and metalloid ions in water was developed. Eight S-layer proteins from different bacteria species were used for the...