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Journal for Biophysical Chemistry

Figure 3 | Biointerphases

Figure 3

From: X-ray and neutron investigation of self-assembled lipid layers on a titanium surface

Figure 3

Neutron reflectivity experiment. A) Squares correspond to Ti crystal, which was not heated before. This curve was measured against D2O; B) Squares – Ti crystal after the thermal treatment, measured against D2O; C) Squares - OPA coated Ti crystal vs D2O; D) Squares – Ti+OPA+POPE+2xPOPE crystal vs D2O-H2O mixture (80%-20%). Circles - Ti+OPA+POPE+2xPOPE crystal vs H2O. The fits are presented in the graphs as the light grey lines. For clarity the theoretical curve obtained from the step SLD profiles are skipped, since they are quite identical to the presented theoretical curves obtained from the smooth SLD profiles. The step SLD profiles are presented (graphs C and D) as well as the smooth SLD profiles in the upper-right corners of the graphs. The region 1 corresponds to silicon; the region 2 – the layer of silicon dioxide; the region 3 – the layer of titanium; the region 4 – the layer of titanium dioxide. The parts of the SLD profiles, which are placed in region 5, fit the hydrocarbon region, in turn, the bumps in the region 5 correspond to the head’s groups region of POPE.

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