The extensibility of poly(diphenylamine) monolayer at air/liquid interface

Sheng Feng Chung, Yuh-Lang Lee, Ten-Chin Wen

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

The extensibility of poly(diphenylamine) (PDPA) is investigated via Langmuir monolayers and Langmuir-Blodgett (LB) film techniques. PDPA monolayers were prepared by spreading stock solutions of various concentrations on subphases of water, hydrochloric acid (HCl) solution, and methane sulfonic acid (MSA) solution. The effects of various PDPA concentrations and subphases on the behavior of monolayer were analyzed via properties of surface pressure-area per repeat unit (π-A) isotherms and also observed by using a Brewster angle microscopy. PDPA LB films were transferred onto hydrophilic glass plates and observed by atomic force microscopy. The results show that the extension of polymer chain for PDPA at the air/liquid interface is strongly affected by the PDPA concentration in the spreading solvent. For the various subphases used, PDPA molecules can extend better in an acidic subphase than in the pure water due to the protonation of amine groups at the presence of hydrogen ion. Besides, it is also found that MSA has a superior ability, than HCl, in extending the PDPA molecules and obtaining a stable monolayer.

Original languageEnglish
Pages (from-to)258-266
Number of pages9
JournalThin Solid Films
Volume493
Issue number1-2
DOIs
Publication statusPublished - 2005 Dec 22

Fingerprint

Diphenylamine
liquid air
Monolayers
sulfonic acid
hydrochloric acid
Langmuir-Blodgett films
Langmuir Blodgett films
Liquids
Hydrochloric acid
methane
Air
Methane
Brewster angle
monomolecular films
hydrogen ions
water
Molecules
Sulfonic Acids
Acids
Hydrochloric Acid

All Science Journal Classification (ASJC) codes

  • Surfaces, Coatings and Films
  • Condensed Matter Physics
  • Surfaces and Interfaces

Cite this

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title = "The extensibility of poly(diphenylamine) monolayer at air/liquid interface",
abstract = "The extensibility of poly(diphenylamine) (PDPA) is investigated via Langmuir monolayers and Langmuir-Blodgett (LB) film techniques. PDPA monolayers were prepared by spreading stock solutions of various concentrations on subphases of water, hydrochloric acid (HCl) solution, and methane sulfonic acid (MSA) solution. The effects of various PDPA concentrations and subphases on the behavior of monolayer were analyzed via properties of surface pressure-area per repeat unit (π-A) isotherms and also observed by using a Brewster angle microscopy. PDPA LB films were transferred onto hydrophilic glass plates and observed by atomic force microscopy. The results show that the extension of polymer chain for PDPA at the air/liquid interface is strongly affected by the PDPA concentration in the spreading solvent. For the various subphases used, PDPA molecules can extend better in an acidic subphase than in the pure water due to the protonation of amine groups at the presence of hydrogen ion. Besides, it is also found that MSA has a superior ability, than HCl, in extending the PDPA molecules and obtaining a stable monolayer.",
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The extensibility of poly(diphenylamine) monolayer at air/liquid interface. / Chung, Sheng Feng; Lee, Yuh-Lang; Wen, Ten-Chin.

In: Thin Solid Films, Vol. 493, No. 1-2, 22.12.2005, p. 258-266.

Research output: Contribution to journalArticle

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AB - The extensibility of poly(diphenylamine) (PDPA) is investigated via Langmuir monolayers and Langmuir-Blodgett (LB) film techniques. PDPA monolayers were prepared by spreading stock solutions of various concentrations on subphases of water, hydrochloric acid (HCl) solution, and methane sulfonic acid (MSA) solution. The effects of various PDPA concentrations and subphases on the behavior of monolayer were analyzed via properties of surface pressure-area per repeat unit (π-A) isotherms and also observed by using a Brewster angle microscopy. PDPA LB films were transferred onto hydrophilic glass plates and observed by atomic force microscopy. The results show that the extension of polymer chain for PDPA at the air/liquid interface is strongly affected by the PDPA concentration in the spreading solvent. For the various subphases used, PDPA molecules can extend better in an acidic subphase than in the pure water due to the protonation of amine groups at the presence of hydrogen ion. Besides, it is also found that MSA has a superior ability, than HCl, in extending the PDPA molecules and obtaining a stable monolayer.

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