Figure 2.

Biotinylated surfaces with controlled lateral mobility and biotin content. (A) Schematic representation of a b-SLB, chemical structure of lipids and a characteristic QCM-D signature of b-SLB formation using SUVs made of DOPC (1) and DOPE-CAP-biotin (2) at a 19:1 molar ratio. The time of SUV exposure is indicated by an arrow. (B) Schematic representation of b-SAM, chemical structure of thiols and characteristic images of water drops placed on a bare Au surface and on Au surfaces functionalized with HS-(CH₂)₁₁-EG₄-OH (3) and its mixture with HS-(CH₂)₁₁-EG₆-biotin (4) at a 9:1 molar ratio with contact angles indicated.