Abstract

The stability of lead stearate layers in alternating Langmuir-Blodgett (LB) films of lead stearate/lead deuterated stearate with and without poly(<i>tert</i>-butyl methacrylate) (PtBMA) layers at each interface was measured from the magnitude of the splitting of the CH₂ or CD₂ scissoring band in transmission FT-IR spectra. Before annealing, the extent of splitting of the CH₂ or CD₂ bending mode in the alternating LB film with PtBMA layers was larger than that in the alternating LB film without PtBMA layers. However, the opposite trend was observed after annealing. This suggests that PtBMA does not function as a barrier to interlayer mixing on annealing. The results presented here represent the first report that PtBMA has two important roles: before annealing it stabilizes the fatty acid layers, and after annealing it disturbs these layers. PtBMA is expected to act as a substrate when it is inserted between fatty acid layers. This PtBMA substrate can stabilize the fatty acid layers at room temperature. However, external reflection FT-IR spectra indicate that annealing causes the reorientation of PtBMA. This reorientation of PtBMA could disturb the fatty acid layers.

Synthesis of polyamic acid possessing second-order nonlinear optical properties and its application to Langmuir–Blodgett films

Cheolsoo Jung, Mitsutoshi Jikei, and Masa-aki Kakimoto
J. Opt. Soc. Am. B 15(1) 471-476 (1998)

Second-harmonic generation in mixed hemicyanine: fatty-acid Langmuir–Blodgett monolayers

I. R. Girling, N. A. Cade, P. V. Kolinsky, R. J. Jones, I. R. Peterson, M. M. Ahmad, D. B. Neal, M. C. Petty, G. G. Roberts, and W. J. Feast
J. Opt. Soc. Am. B 4(6) 950-955 (1987)

Optical properties of Langmuir–Blodgett films investigated by a photoacoustic technique

Yue-song Jiang, Shu-yi Zhang, Hai-ping Shao, and Chun-wei Yuan
Appl. Opt. 34(1) 169-173 (1995)

In-line fiber-optic components using Langmuir–Blodgett films

R. B. Charters, S. E. Staines, and R. P. Tatam
Opt. Lett. 19(23) 2036-2038 (1994)

Blue and green Čerenkov-type second-harmonic generation in a polymeric Langmuir–Blodgett waveguide

Koen Clays, Nancy J. Armstrong, and Thomas L. Penner
J. Opt. Soc. Am. B 10(5) 886-893 (1993)