scholarly journals Zero-Kelvin Compression Isotherms of the Elements 1 ≤Z≤ 92 to 100 GPa

2016 ◽  
Vol 45 (4) ◽  
pp. 043101 ◽  
Author(s):  
David A. Young ◽  
Hyunchae Cynn ◽  
Per Söderlind ◽  
Alexander Landa
Keyword(s):  
Compression Isotherms

Miscibility of dipalmitoylphosphatidylcholine, oleic acid and cholesterol measured by DSC and compression isotherms of monolayers

1994 ◽  
Vol 232 (2) ◽  
pp. 261-269 ◽  
Author(s):  
M.A. Busquets ◽  
C. Mestres ◽  
M.A. Alsina ◽  
J.M.Garcia Antón ◽  
F. Reig
Keyword(s):  
Oleic Acid ◽  
Compression Isotherms

Quantitative analysis of compression isotherms of fullerene C60 Langmuir layers

2008 ◽  
Vol 70 (1) ◽  
pp. 6-11 ◽  
Author(s):  
L. A. Valkova ◽  
A. S. Glibin ◽  
L. Valli
Keyword(s):  
Quantitative Analysis ◽  
Fullerene C60 ◽  
Compression Isotherms

Synthesis of 3-tetradecylpentane-2,4-dione and investigation of its compression isotherms by the Lengmuir-Blodgett method

2010 ◽  
Vol 80 (10) ◽  
pp. 1895-1900 ◽  
Author(s):  
M. E. Sokolov ◽  
I. N. Arkhipova ◽  
F. A. Kolokolov ◽  
V. A. Volynkin ◽  
V. T. Panyushkin
Keyword(s):  
Compression Isotherms

A model of compression isotherms for analyzing particle layers

2016 ◽  
Vol 489 ◽  
pp. 128-135 ◽  
Author(s):  
Wojciech Marczak ◽  
Marek Rogalski ◽  
Ali Modarressi ◽  
Ewa Rogalska
Keyword(s):  
Compression Isotherms

scholarly journals Humidity-dependent compression-induced glass transition of the air–water interfacial Langmuir films of poly(d,l-lactic acid-ran-glycolic acid) (PLGA)

Soft Matter ◽  
2015 ◽  
Vol 11 (28) ◽  
pp. 5666-5677 ◽  
Author(s):  
Hyun Chang Kim ◽  
Hoyoung Lee ◽  
Hyunjung Jung ◽  
Yun Hwa Choi ◽  
Mati Meron ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Glass Transition ◽  
Surface Pressure ◽  
Glycolic Acid ◽  
High Surface ◽  
Polymer Concentration ◽  
Langmuir Films ◽  
Exponential Increase ◽  
Constant Rate ◽  
Compression Isotherms

Constant rate compression isotherms of the air–water interfacial Langmuir PLGA films show a distinct feature of an exponential increase in surface pressure in the high surface polymer concentration regime.

scholarly journals Surface characteristics of phosphatidylglycerol phosphate from the extreme halophile Halobacterium cutirubrum compared with those of its deoxy analogue, at the air/water interface

1989 ◽  
Vol 261 (2) ◽  
pp. 377-381 ◽  
Author(s):  
P J Quinn ◽  
M Kates ◽  
J F Tocanne ◽  
M Tomoaia-Cotişel
Keyword(s):  
Surface Characteristics ◽  
Water Interface ◽  
Extreme Halophile ◽  
Molecular Area ◽  
Counter Ions ◽  
Nacl Concentration ◽  
Air Water Interface ◽  
Decreasing Ph ◽  
Compression Isotherms ◽  
The Relationship

The relationship between area per molecule and surface pressure of monolayers of phosphatidylglycerol phosphate from extreme halophile Halobacterium cutrirubrum and its deoxy analogue, deoxyphosphatidylglycerol phosphate, spread at an air/water interface was examined. The effect of ionization of the primary and secondary acidic functions of the phosphate groups of the two lipids on surface characteristics of compression isotherms was determined by spreading monolayers on subphases with pH values ranging from below the apparent pKa of the primary ionization (pH 0) to greater than that of secondary ionization (pH 10.9). The limiting molecular area increases with decreasing pH below 2. Ionization of the primary phosphate functions of both phospholipids (with bulk pK1 values close to 4) is associated with a marked expansion of the films, as judged by values of limiting molecular area. Ionization of the secondary phosphate functions causes further expansion of the films, with the apparent pK2 of deoxyphosphatidylglycerol phosphate slightly less than that indicated for phosphatidylglycerol phosphate. Values of surface-compressibility modulus calculated from the surface characteristics of the phosphatidylglcerol phosphate monolayers showed that films spread on subphases with a pH of about the apparent pK1 of the primary phosphate functions were the least compressible. Increasing or decreasing subphase pH caused an increase in compressibility; this effect on compressibility was much less with monolayers of deoxyphosphatidylglycerol phosphate at high pH. The effect of inorganic counter-ions on monolayer characteristics of phosphatidylglycerol phosphate was examined by using subphases of NaCl concentrations varying from 0.01 to 1 M. The limiting molecular area was found to increase exponentially with respect to the subphase NaCl concentration.

scholarly journals Study of Langmuir monolayers and Langmuir-Schaefer films based on symmetrical meso-aryl-substituted porphyrin derivative

2021 ◽  
Vol 2086 (1) ◽  
pp. 012195
Author(s):  
V N Mironyuk ◽  
A J K Al-Alwani ◽  
N N Begletsova ◽  
M V Gavrikov ◽  
A S Kolesnikova ◽  
...  
Keyword(s):  
Experimental Data ◽  
Langmuir Monolayers ◽  
Specific Area ◽  
Compression Modulus ◽  
Contact Mode ◽  
Force Microscopy ◽  
Atomic Force ◽  
Solid Substrates ◽  
Compression Isotherms ◽  
Transfer Pressure

Abstract This paper presents the results of a study of meso-aryl-substituted porphyrin Langmuir monolayers by the method of compression isotherms. Experimental data were used to plot the dependences of the compression modulus (C−1) on the specific area. Monolayers at specific surface pressure were transferred to solid substrates and investigated. The monolayers were transferred to the surface of monocrystalline silicon at surface pressures of 8, 25, and 60 mN/m and examined them by atomic force microscopy (AFM) in a semi-contact mode. It was found that with an increase in the transfer pressure, the coarsening of molecular aggregates occurs. The smallest roughness is observed for a porphyrin film formed and transferred at a pressure of 8 mN/m.

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