Structure of hydrocarbon chains in surfactant monolayers at the air/water interface: neutron reflection from dodecyl trimethylammonium bromide

1996 ◽  
Vol 92 (3) ◽  
pp. 403 ◽  
Author(s):  
Jian Ren Lu ◽  
Zhi Xin Li ◽  
Robert K. Thomas ◽  
Jeffrey Penfold
Keyword(s):  
Water Interface ◽  
Surfactant Monolayers ◽  
Neutron Reflection ◽  
Hydrocarbon Chains ◽  
Air Water Interface

The Determination of the Structure and Coverage of Nonionic Surfactant Monolayers at the Air-Water Interface Using Neutron Reflection Technique

1994 ◽  
Vol 376 ◽  
Author(s):  
Jian R. Lu ◽  
Robert K. Thomas
Keyword(s):  
Nonionic Surfactant ◽  
Gaussian Distribution ◽  
Water Interface ◽  
Surfactant Monolayers ◽  
Neutron Reflection ◽  
Air Water Interface ◽  
Oligoethylene Glycols

ABSTRACTThe coverage and structure of the monododecyl ethers of oligoethylene glycols, C12Em where m = 2, 4, 6 and 8, adsorbed at the air-water interface have been studied by neutron reflection. At their c.m.c.s, the area per molecule is 33 ± 3 Å2 for C12E2, 44 ± 3 Å2 for C12E4 55 ± 3 Å2 for C12E6 and 62 ± 3 Å2 for C12E8. In terms of the width of a Gaussian distribution at 1/e of its height the thicknesses of the dodecyl chains are found to be constant at 16 ± 2 Å and those of the heads to vary from 11 to 19±2Å from m = 2 to 8. There is also found to be some overlap between the two chains at the interface.

Structure of Monolayers of Monododecyl Dodecaethylene Glycol at the Air−Water Interface Studied by Neutron Reflection

1997 ◽  
Vol 101 (49) ◽  
pp. 10332-10339 ◽  
Author(s):  
J. R. Lu ◽  
T. J. Su ◽  
Z. X. Li ◽  
R. K. Thomas ◽  
E. J. Staples ◽  
...  
Keyword(s):  
Water Interface ◽  
Neutron Reflection ◽  
Air Water Interface ◽  
Dodecaethylene Glycol

Structural conformation of lysozyme layers at the air/water interface studied by neutron reflection

1998 ◽  
Vol 94 (21) ◽  
pp. 3279-3287 ◽  
Author(s):  
J. R. Lu ◽  
T. J. Su ◽  
R. K. Thomas ◽  
J. Penfold ◽  
J. Webster
Keyword(s):  
Water Interface ◽  
Neutron Reflection ◽  
Structural Conformation ◽  
Air Water Interface
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