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Journal for Biophysical Chemistry

Table 2 Neutron scattering length densities

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

Sample

Material

Thickness, Å

SLD,10-6Å-2

Roughness, Å

Solvent volume fraction, %

Ti crystal before heating vs D2O

Si

None

2

None

0

SiO2

40±2

3.4

8±4

0

Ti

368±3

−1.96

12±2

0

TiO2

24±2

2.4

13±2

0

Subphase layer

None

6.36

15±5

 

D2O

None

6.36

0

 

Ti crystal after heating vs D2O

Si

None

2

None

0

SiO2

40±5

3.4

8±4

0

Ti

357±2

−1.96

12±2

0

TiO2

38±3

2.4

13±2

12±5

D2O

None

6.36

13

 

OPA coated Ti crystal vs D2O

Si

None

2

None

0

SiO2

40±5

3.4

8±4

0

Ti

357±2

−1.96

12±2

0

TiO2

40±5

2.9

13±2

12±5

OPA layer

24±1

−0.3

12±2

12±5

Gradient layer

60±10

6.36

60±10

 

D2O

None

6.36

0

 

Ti+OPA+POPE+2x POPE bilayer vs D2O- H2O mixture (80–20)

Si

None

2

None

0

SiO2

40±5

3.4

8±4

0

Ti

357±2

−1.96

12±2

0

TiO2

40±5

2.9

13±2

12±5

OPA

24±1

−0.3

12±2

12±5

Chain’s group region 1

17±2

1.5±0.4

12±4

32±5

Head’s group region 1

16±2

2.6±0.4

5±2

32±5

Chain’s group region 2

34±3

2.2±0.4

10±3

53±5

Head’s group region 2

8±1

3.4±0.4

5±3

53±5

Gradient layer

60

4.9

60

 

D2O

None

4.9

0

 

Ti+OPA+POPE+2x POPE vs H2O

Si

None

2

None

0

SiO2

40±5

3.4

8±4

0

Ti

357±2

−1.96

12±2

0

TiO2

40±5

2.9

13±2

12±5

OPA

24±1

−0.3

12±2

12±5

Chain’s group region 1

17±2

−0.3±0.4

12±4

32±5

Head’s group region 1

16±2

1.2±0.4

5±2

32±5

Chain’s group region 2

34±3

−0.4±0.1

10±3

53±5

Head’s group region 2

8±1

0.5±0.3

5±3

53±5

Gradient layer

60

−0.5

60

 

D2O

None

−0.5

0