scholarly journals Thin-film behavior of poly(methyl methacrylates). 1. Monolayers at the air-water interface

1991 ◽  
Vol 24 (7) ◽  
pp. 1487-1495 ◽  
Author(s):  
R. H. G. Brinkhuis ◽  
A. J. Schouten
Keyword(s):  
Thin Film ◽  
Water Interface ◽  
Air Water Interface ◽  
Methyl Methacrylates

Effects of Metal Cations on the Dynamic Characteristics of a Phospholipid Thin Film at an Air/Water Interface

1996 ◽  
Vol 69 (12) ◽  
pp. 3429-3434 ◽  
Author(s):  
Masakazu Makino ◽  
Mamoru Kamiya ◽  
Toshio Ishii ◽  
Kenichi Yoshikawa
Keyword(s):  
Thin Film ◽  
Dynamic Characteristics ◽  
Metal Cations ◽  
Water Interface ◽  
Air Water Interface

Crossover from semi-dilute to densely packed thin polymer films at the air–water interface and structure formation at thin film breakup

Soft Matter ◽  
2018 ◽  
Vol 14 (23) ◽  
pp. 4750-4761 ◽  
Author(s):  
Christian Appel ◽  
Martin Kraska ◽  
Christian Rüttiger ◽  
Markus Gallei ◽  
Bernd Stühn
Keyword(s):  
Thin Film ◽  
Polymer Film ◽  
Structure Formation ◽  
Water Interface ◽  
Thin Polymer Films ◽  
X Ray ◽  
X Ray Scattering ◽  
Thin Polymer ◽  
Air Water Interface

First evidence for thin film breakup of a polymer film observed by in situ Surface X-ray scattering at the air–water interface.

scholarly journals Tadpole-Shaped POSS-Based Copolymers and the Aggregation Behavior at Air/Water Interface

2018 ◽  
Vol 2018 ◽  
pp. 1-10 ◽  
Author(s):  
Lin Zhu ◽  
Fang Chen ◽  
Xiaoyan Ma ◽  
Xiu Qiang ◽  
Zhiguang Li ◽  
...  
Keyword(s):  
Thin Film ◽  
Block Copolymers ◽  
Surface Pressure ◽  
Self Assembly ◽  
Aggregation Behavior ◽  
Structure Evolution ◽  
Interfacial Rheology ◽  
Water Interface ◽  
Block Sequence ◽  
Air Water Interface

The aggregation behavior of three tadpole-shaped Polyhedral oligomeric silsesquioxane (POSS) based block copolymers using different blocks poly(methyl methacrylate) (PMMA) and poly(trifluoroethyl methacrylate) (PTFEMA) with different block sequence and ratio (POSS-PTFEMA161-b-PMMA236, POSS-PMMA277-b-PTFEMA130, and POSS-PMMA466-b-PTFEMA172) was investigated on the air-water interface. The interfacial rheology of three block copolymers was studied by surface pressure isotherm, compression modulus measurements, and compression and expansion hysteresis analysis on the Langmuir trough. The block sequence and ratio play a great role in self-assembly behavior at the interface. Based on surface pressure isotherm analysis, a thin film with low elasticity was achieved for the POSS-PTFEMA161-b-PMMA236. Moreover, for the block copolymer with same segment sequence (POSS-PMMA2-b-PTFEMA), the thin film compression capability is increased with increasing the PMMA ratio. The morphology of the deposited LB thin film was illustrated by atomic force microscopy (AFM) and X-ray photoelectron spectroscopy (XPS). We observed that a thin film was composed by crater-shaped quasi-2D micelles for POSS-PTFEMA-b-PMMA, while it was proved that only flaky texture was observed for both POSS-PMMA277-b-PTFEMA130 and POSS-PMMA466-b-PTFEMA172. The thickness and area of flaky aggregates were greatly related to PMMA ratio. The different interface self-assembly structure evolution was proposed based on the interfacial rheology and thin film morphology studies.

Photocatalytic Polypyrrole−TiO2−Nanoparticles Composite Thin Film Generated at the Air−Water Interface

Langmuir ◽  
2005 ◽  
Vol 21 (9) ◽  
pp. 4123-4128 ◽  
Author(s):  
Devasish Chowdhury ◽  
Anumita Paul ◽  
Arun Chattopadhyay
Keyword(s):  
Thin Film ◽  
Tio2 Nanoparticles ◽  
Composite Thin Film ◽  
Water Interface ◽  
Air Water Interface

Humidity sensing properties of transferable polyaniline thin films formed at the air–water interface

RSC Advances ◽  
2016 ◽  
Vol 6 (99) ◽  
pp. 96935-96941 ◽  
Author(s):  
Tong-Fei Wu ◽  
Jong-Dal Hong
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Humidity Sensor ◽  
High Sensitivity ◽  
Water Interface ◽  
Humidity Sensing ◽  
Response Recovery ◽  
Air Water Interface ◽  
Recovery Times ◽  
Humidity Sensing Properties

A humidity sensor made from a transferable PANI thin film exhibits relatively high sensitivity and short response/recovery times. The sensitive properties are tailorable by acid doping.

scholarly journals A numerical scheme to calculate temperature and salinity dependent air-water transfer velocities for any gas

2010 ◽  
Vol 7 (1) ◽  
pp. 251-290 ◽  
Author(s):  
M. T. Johnson
Keyword(s):  
Thin Film ◽  
Gas Exchange ◽  
Numerical Scheme ◽  
Full Range ◽  
General Interest ◽  
Water Interface ◽  
Henry's Law ◽  
Transfer Velocity ◽  
Henry’S Law ◽  
Air Water Interface

Abstract. The transfer velocity determines the rate of exchange of a gas across the air-water interface for a given deviation from Henry's law equilibrium between the two phases. In the thin film model of gas exchange, which is commonly used for calculating gas exchange rates from measured concentrations of trace gases in the atmosphere and ocean/freshwaters, the overall transfer is controlled by diffusion-mediated films on either side of the air-water interface. Calculating the total transfer velocity (i.e. including the influence from both molecular layers) requires the Henry's law constant and the Schmidt number of the gas in question, the latter being the ratio of the viscosity of the medium and the molecular diffusivity of the gas in the medium. All of these properties are both temperature and (on the water side) salinity dependent and extensive calculation is required to estimate these properties where not otherwise available. The aim of this work is to standardize the application of the thin film approach to flux calculation from measured and modelled data, to improve comparability, and to provide a numerical framework into which future parameter improvements can be integrated. A detailed numerical scheme is presented for the calculation of the gas and liquid phase transfer velocities (ka and kw respectively) and the total transfer velocity, K. The scheme requires only basic physical chemistry data for any gas of interest and calculates K over the full range of temperatures, salinities and wind-speeds observed in and over the ocean. Improved relationships for the wind-speed dependence of ka and for the salinity-dependence of the gas solubility (Henry's law) are derived. Comparison with alternative schemes and methods for calculating air-sea flux parameters shows good agreement in general but significant improvements under certain conditions. The scheme is provided as a downloadable program in the supplementary material, along with input files containing molecular weight, solubility and structural data for 80 gases of general interest, enabling calculation of the total transfer velocity over ranges of temperature and salinity for each gas.

Biopolymer-Thin Film Interactions

1992 ◽  
Vol 292 ◽  
Author(s):  
K. M. Maloney ◽  
D. W. Grainger
Keyword(s):  
Thin Film ◽  
Fluorescence Microscopy ◽  
Self Assembly ◽  
Protein Docking ◽  
Lipid Monolayer ◽  
Protein Recognition ◽  
Lipid Monolayers ◽  
Water Interface ◽  
Air Water Interface

AbstractBiopolymer self assembly in heterogeneous lipid monolayers at the air-water interface was investigated. Fluorescence microscopy allowed the visualization of protein recognition and binding to these microstructured membranes. Mimicking proteininduced membrane microstructuring and protein docking was achieved in ternary mixed lipid monolayer systems.

Clay-modified electrodes prepared by the Langmuir-Blodgett method

Clay Minerals ◽  
1997 ◽  
Vol 32 (1) ◽  
pp. 79-88 ◽  
Author(s):  
Y. Hotta ◽  
M. Taniguchi ◽  
K. Inukai ◽  
A. Yamagishi
Keyword(s):  
Thin Film ◽  
Water Surface ◽  
Modified Electrodes ◽  
Double Layers ◽  
Carbon Substrate ◽  
Cyclic Voltammogram ◽  
Water Interface ◽  
Langmuir Blodgett ◽  
Air Water Interface ◽  
Glassy Carbon Substrate

AbstractAn ion-exchange adduct of saponite with tetra-n-decylammonium cation ((n-decyl)4N+) was prepared and dispersed in chloroform. The material was spread on a water surface to form a thin film at the air-water interface. From the measurements of surface pressure vs. area, it was concluded that the film consisted of the very thin layer which was a mixture of single and double layers of saponite adduct. A clay-modified electrode was prepared by depositing the film on a glassy carbon substrate using the Langmuir-Blodgett method. When the electrode was soaked in an aqueous solution of [Fe(phen)3](ClO4)2 (phen = 1,10-phenanthroline), (n-decyl)4N+ cations were replaced by [Fe(phen)3]2+ ions from solution. This process was followed by measuring the cyclic voltammogram.

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