Molecular order in Langmuir-Blodgett assembled films of an azobenzene amphiphile

被引：3

作者：

Chiarelli, Peter A. ^{[1
]}

Liu, Ding-Guo ^{[1
]}

Watkins, Erik B. ^{[2
]}

Trouw, Frans R. ^{[2
]}

Majewski, Jaroslaw ^{[2
]}

Casson, Joanna L. ^{[1
]}

Tang, Zhexiong ^{[1
]}

Johal, Malkiat S. ^{[3
]}

Robinson, Jeanne M. ^{[1
]}

Wang, Hsing-Lin ^{[1
]}

机构：

[1] Los Alamos Natl Lab, Div Chem, Los Alamos, NM 87545 USA

[2] Los Alamos Natl Lab, Los Alamos Neutron Sci Ctr, Los Alamos, NM 87545 USA

[3] Pomona Coll, Dept Chem, Claremont, CA 91711 USA

来源：

THIN SOLID FILMS | 2009年 / 517卷 / 16期

关键词：

Langmuir-Blodgett films; X-ray scattering; Structure properties; Interface; 2ND-HARMONIC GENERATION; THIN-FILMS; NONLINEAR OPTICS; TOTAL-REFLECTION; SURFACE; MICROSTRUCTURE; MONODENDRONS; ENHANCEMENT; MULTILAYERS; MONOLAYERS;

D O I：

10.1016/j.tsf.2009.02.148

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Alternating multilayers of amphiphile, 4-{4-[Methyl-(4-octadecylcarbamoyl-butyl)-amino]-phenylazo}-benzenesulfonic acid (S-azo-C-18), and stearic acid were deposited on hydrophobized silica surfaces using the Langmuir-Blodgett technique. Ellipsometry, UV-visible spectroscopy, and second harmonic generation were used to characterize the films, demonstrating reproducible deposition and suggesting a well ordered film structure. Despite the appearance of order at the macroscopic level, neutron and X-ray scattering results unequivocally show that there is considerable disorder, with significant interpenetration between the stearic acid and S-azo-C-18 layers. These results suggest that molecular disorder in Langmuir-Blodgett deposited multilayer films may often go unrecognized mainly because the macroscopic probes based on these optical measurements are not adequate for determining the molecular level structural order. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：4638 / 4643

页数：6

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