The Effect of Bacterial Adhesion on Grafted Chains Revealed by the Non-Invasive Sum Frequency Generation Spectroscopy
Figure 2
Schematic ODT SAM conformations (the effect of ODT environment is strongly exaggerated for clarity). A: in air. B: in distilled water. C and D show the two extreme possibilities of methyl orientation adjustment allowed by the rotation of the C backbone planes about the average molecular axis. C and D correspond ideally to hydrophilic and hydrophobic interactions, respectively. The directions of the dipole moments of CH3 (symmetric , asymmetric in plane and out of plane ) are also indicated. Values of methyl axis tilt angle of the ODT SAM in different environments are added below.