Miscibility and Multilayer Formation of Fluoroalkane−α,ω-Diol Mixtures at the Air/Water Interface

2011 ◽  
Vol 115 (3) ◽  
pp. 471-477
Author(s):  
Takanori Takiue ◽  
Fumiya Nakamura ◽  
Hiroyasu Sakamoto ◽  
Hiroki Matsubara ◽  
Makoto Aratono
Keyword(s):  
Water Interface ◽  
Air Water Interface ◽  
Multilayer Formation

scholarly journals Multilayer formation by a compressed monolayer of poly-∈-benzyloxycarbonyl-l-lysine

1968 ◽  
Vol 110 (4) ◽  
pp. 733-737 ◽  
Author(s):  
B. R. Malcolm
Keyword(s):  
Infrared Spectroscopy ◽  
Electron Diffraction ◽  
Helical Conformation ◽  
Water Interface ◽  
Ordered Arrays ◽  
Molecular Monolayers ◽  
Air Water Interface ◽  
Polarized Infrared Spectroscopy ◽  
Multilayer Formation ◽  
Perfect Plastic

Molecular monolayers of poly-∈-benzyloxycarbonyl-l-lysine were studied at the air/water interface. Deuterium-exchange measurements and the surface area of the monolayer are consistent with a structure consisting of condensed ordered arrays of α-helices. Collapsed films removed from the surface and air-dried were examined by polarized infrared spectroscopy and electron diffraction and found to consist of molecules in the α-helical conformation. There is no indication of a conformational change during compression of the monolayer, and a series of transitions found in the force–area curve are interpreted as the consecutive formation of additional layers of molecules. Some of the factors that influence this almost perfect plastic behaviour are discussed.

Molecular Orientation and Multilayer Formation of 1H,1H,8H,8H-Perfluorooctane-1,8-diol at the Air/Water Interface

2009 ◽  
Vol 113 (18) ◽  
pp. 6305-6310 ◽  
Author(s):  
Takanori Takiue ◽  
Fumiya Nakamura ◽  
Daiki Murakami ◽  
Tsubasa Fukuda ◽  
Aya Shuto ◽  
...  
Keyword(s):  
Molecular Orientation ◽  
Water Interface ◽  
Air Water Interface ◽  
Multilayer Formation

Successive Multilayer Formation of Cyclolinear Polyorganosiloxanes Floating at the Air−Water Interface. A Synchrotron X-ray Reflectivity Investigation

2003 ◽  
Vol 36 (19) ◽  
pp. 7236-7243 ◽  
Author(s):  
T. R. Jensen ◽  
K. Kjaer ◽  
G. Brezesinski ◽  
J. Ruiz-Garcia ◽  
H. Möhwald ◽  
...  
Keyword(s):  
Water Interface ◽  
X Ray ◽  
Air Water Interface ◽  
Multilayer Formation

Sampling and analysis of the air-water interface with SEM and EDS of microlayers

1989 ◽  
Vol 47 ◽  
pp. 1004-1005
Author(s):  
Randall W. Smith ◽  
John Dash
Keyword(s):  
Heavy Metals ◽  
Surface Microlayer ◽  
Surface Films ◽  
Water Interface ◽  
Physical Processes ◽  
Infrared Spectroscopic Analysis ◽  
Eds Analysis ◽  
Air Water Interface ◽  
Significant Area ◽  
Bulk Chemical

The structure of the air-water interface forms a boundary layer that involves biological ,chemical geological and physical processes in its formation. Freshwater and sea surface microlayers form at the air-water interface and include a diverse assemblage of organic matter, detritus, microorganisms, plankton and heavy metals. The sampling of microlayers and the examination of components is presently a significant area of study because of the input of anthropogenic materials and their accumulation at the air-water interface. The neustonic organisms present in this environment may be sensitive to the toxic components of these inputs. Hardy reports that over 20 different methods have been developed for sampling of microlayers, primarily for bulk chemical analysis. We report here the examination of microlayer films for the documentation of structure and composition.Baier and Gucinski reported the use of Langmuir-Blogett films obtained on germanium prisms for infrared spectroscopic analysis (IR-ATR) of components. The sampling of microlayers has been done by collecting fi1ms on glass plates and teflon drums, We found that microlayers could be collected on 11 mm glass cover slips by pulling a Langmuir-Blogett film from a surface microlayer. Comparative collections were made on methylcel1ulose filter pads. The films could be air-dried or preserved in Lugol's Iodine Several slicks or surface films were sampled in September, 1987 in Chesapeake Bay, Maryland and in August, 1988 in Sequim Bay, Washington, For glass coverslips the films were air-dried, mounted on SEM pegs, ringed with colloidal silver, and sputter coated with Au-Pd, The Langmuir-Blogett film technique maintained the structure of the microlayer intact for examination, SEM observation and EDS analysis were then used to determine organisms and relative concentrations of heavy metals, using a Link AN 10000 EDS system with an ISI SS40 SEM unit. Typical heavy microlayer films are shown in Figure 3.

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