Direct measurements of surface forces between various Langmuir-Blodgett films

Kazue Kurihara; Toyoki Kunitake; Noboyuki Higashi; Masazo Niwa

doi:10.1016/0040-6090(92)90373-J

Direct measurements of surface forces between various Langmuir-Blodgett films

Kazue Kurihara, Toyoki Kunitake, Noboyuki Higashi, Masazo Niwa

New Industry Creation Hatchery Center (NICHe)

Research output: Contribution to journal › Article › peer-review

8 Citations (Scopus)

Abstract

Langmuit-Blodgett (LB) films of various amphiphiles were prepared on molecularly smooth mica sheets, and interactions between these films were measured directly using surface forces apparatus. Very long range attraction extending close to 300 nm was found between two hydrophobic monolayers of a polamerized ammonium amphiphile in pure water. Surface structure and adhesive properties of hydrophilic bilayers of the identical amphiphile were also studied. This polymerized layer displayed weak adhesion of 1-5 mN/m. Using monolayers of a poly(methacrylic acid) amphiphile, it was possible to measure pH-induced changes in effective forces, reflecting different ionization states of the polyelectrolyte. The direct force measurement is a powerful means to study structures and interactions of LB film surfaces at the nanometer scale, and LB modification has high potential to prepare novel surfaces for measurement of forces.

Original language	English
Pages (from-to)	681-684
Number of pages	4
Journal	Thin Solid Films
Volume	210-211
Issue number	PART 2
DOIs	https://doi.org/10.1016/0040-6090(92)90373-J
Publication status	Published - 1992 Apr 30

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abstract = "Langmuit-Blodgett (LB) films of various amphiphiles were prepared on molecularly smooth mica sheets, and interactions between these films were measured directly using surface forces apparatus. Very long range attraction extending close to 300 nm was found between two hydrophobic monolayers of a polamerized ammonium amphiphile in pure water. Surface structure and adhesive properties of hydrophilic bilayers of the identical amphiphile were also studied. This polymerized layer displayed weak adhesion of 1-5 mN/m. Using monolayers of a poly(methacrylic acid) amphiphile, it was possible to measure pH-induced changes in effective forces, reflecting different ionization states of the polyelectrolyte. The direct force measurement is a powerful means to study structures and interactions of LB film surfaces at the nanometer scale, and LB modification has high potential to prepare novel surfaces for measurement of forces.",

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AU - Kurihara, Kazue

AU - Kunitake, Toyoki

AU - Higashi, Noboyuki

AU - Niwa, Masazo

PY - 1992/4/30

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AB - Langmuit-Blodgett (LB) films of various amphiphiles were prepared on molecularly smooth mica sheets, and interactions between these films were measured directly using surface forces apparatus. Very long range attraction extending close to 300 nm was found between two hydrophobic monolayers of a polamerized ammonium amphiphile in pure water. Surface structure and adhesive properties of hydrophilic bilayers of the identical amphiphile were also studied. This polymerized layer displayed weak adhesion of 1-5 mN/m. Using monolayers of a poly(methacrylic acid) amphiphile, it was possible to measure pH-induced changes in effective forces, reflecting different ionization states of the polyelectrolyte. The direct force measurement is a powerful means to study structures and interactions of LB film surfaces at the nanometer scale, and LB modification has high potential to prepare novel surfaces for measurement of forces.

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Direct measurements of surface forces between various Langmuir-Blodgett films

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