Two-dimensional facets in Langmuir monolayers of 1-O-hexadecyl-rac-glycerol at the air–water interface

Islam, Nazrul; Kato, Takeshi

doi:10.1016/j.jcis.2005.08.066

Cited by 4 publications

(2 citation statements)

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“…The similar cusp phenomenon in the π – A isotherms was also observed previously in various molecular systems, such as nitro-substituted n -benzylidene hexadecylamine Schiff bases, oxyethylenated nonionic surfactants, diethylene glycol mono- n -octadecyl ether, and trisilanolcyclohexyl-POSS. ,, The π – A isotherms of these studied molecules showed a cusp point and followed a long plateau region, which indicates the phase transition of a monolayer from a liquid expanded phase to a density liquid condensed phase. − However, most of cusp phenomena of π – A isotherms do not show the small peak shape but have more like a turning point. − ,, Esker et al apply trisilanolcyclohexyl-POSS molecular systems to investigate the monolayer behavior during compression . They found that the π – A isotherm has a large cusp and a long plateau region while continuously increasing the surface pressure.…”

Section: Resultssupporting

confidence: 84%

“…40−43 However, most of cusp phenomena of π−A isotherms do not show the small peak shape but have more like a turning point. [40][41][42]44,45 Esker et al apply trisilanolcyclohexyl-POSS molecular systems to investigate the monolayer behavior during compression. 29 They found that the π−A isotherm has a large cusp and a long plateau region while continuously increasing the surface pressure.…”

Section: ■ Introductionmentioning

confidence: 99%

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Interfacial Behaviors of Giant Amphiphilic Molecules Composed of Hydrophobic Isobutyl POSS and Hydrophilic POSS Bearing Carboxylic Acid Groups at the Air–Water Interface

Wang,

Xu,

Feng

et al. 2023

Langmuir

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The behavior of giant amphiphilic molecules at the air− water interface has become a subject of concern to researchers. Small changes in the molecular structure can cause obvious differences in the molecular arrangement and interfacial properties of the monolayer. In this study, we have systematically investigated the interfacial behaviors of the giant amphiphilic molecules with different number of hydrophobic BPOSS blocks and one hydrophilic ACPOSS block ((BPOSS) n -ACPOSS (n = 1−5)) at the air−water interface by the surface pressure−area (π−A) isotherm, Brewster angle microscopy (BAM), compression modulus measurement, and hysteresis measurement. We found that both the number of BPOSS blocks and the compression rate can significantly influence the interfacial behaviors of giant molecules. The π−A isotherms of giant molecules (BPOSS) n -ACPOSS (n = 2−5) exhibit a "cusp" phenomenon which can be attributed to the transition from monolayer to multilayer. However, the cusp is dramatically different from the "collapse" of the monolayer studied in other molecular systems, which is highly dependent on the compression rate of the monolayer. In addition, the compression modulus and hysteresis measurements reveal that the number of BPOSS blocks of (BPOSS) n -ACPOSS plays an important role in the static elasticity, stability, and reversibility of the Langmuir films.

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