Formation and Orientation Studies of a Z-Type Polymeric Langmuir–Blodgett Film

Serfis, Alexa Barnoski; Katzenberger, Rebecca

doi:10.1006/jcis.1999.6477

Cited by 1 publication

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References 17 publications

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“…Controlling the architecture of LB films and constructing polar Z-type multilayer structures has remained a significant challenge. While several examples of Z-type deposition have been reported, − it has remained difficult to design and predict film architecture on the basis of the chemical functionality of the building blocks within the amphiphile. These difficulties are compounded by the observation that in some cases, even for amphiphiles that are deposited in polar multilayer structures, subsequent structural rearrangement of the films to the more stable Y-type structure can occur.…”

Section: Introductionmentioning

confidence: 99%

Sum Frequency Generation Study of Langmuir Blodgett Film Architecture

2006

J. Phys. Chem. B

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We present sum frequency generation vibrational spectroscopy data on monolayer films of pure stearonitrile and mixed films of stearonitrile and ferric stearate deposited by the Langmuir Blodgett technique. Films ranging in composition from pure stearonitrile to 65% stearonitrile/35% ferric stearate deposit in a head-to-tail, Z-type architecture while films of composition <65% stearonitrile deposit in a head-to-head, tail-to-tail, Y-type structure. The vibrational spectra of the monolayer films corresponding to these two different architectures show distinct and characteristic features in their CH stretching regions. Spectral analysis indicates little difference in the modes associated with the terminal methyl groups but large differences in the methylene CH(2) vibrational modes. These spectral differences are consistent with alkyl chains that possess uncompensated methylene oscillator strength arising from portions of the chain that are bent. This behavior is consistent with the energetics expected from a close-packed monolayer of stearonitrile molecules whose CN headgroups possess sizable dipole moments and are expected to adopt a large center-to-center angle to minimize electrostatic, dipole-dipole repulsive interactions.

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Section: Introductionmentioning

confidence: 99%

Sum Frequency Generation Study of Langmuir Blodgett Film Architecture

2006

J. Phys. Chem. B

View full text Add to dashboard Cite

show abstract

Formation and Orientation Studies of a Z-Type Polymeric Langmuir–Blodgett Film

Cited by 1 publication

References 17 publications

Sum Frequency Generation Study of Langmuir Blodgett Film Architecture

Sum Frequency Generation Study of Langmuir Blodgett Film Architecture

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