Non-centrosymmetry and second-harmonic generation in Z-type Langmuir-Blodgett films

An alternative strategy for achieving macroscopic non-centrosymmetric order in Langmuir-Blodgett multilayers is demonstrated. It is found that the addition of a second hydrophobic endgroup to the hydrophilic chromophore reduces the tendency of the molecules to invert during deposition.

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Bibliographic Details
Published in:	Nature (London) Vol. 368; no. 6470; pp. 438 - 440
Main Authors:	Ashwell, Geoffrey J, Jackson, Paul D, Crossland, Wendy A
Format:	Journal Article
Language:	English
Published:	London Nature Publishing 31-03-1994 Nature Publishing Group
Subjects:	Chemistry Condensed matter: structure, mechanical and thermal properties Exact sciences and technology General and physical chemistry Langmuir blodgett films Materials science Molecules Physics Surface physical chemistry Surfaces and interfaces; thin films and whiskers (structure and nonelectronic properties) Organic dye Multilayer Second harmonic Nitrogen heterocycle Optical properties Non linear optics Bicyclic compound Aromatic compound Langmuir Blodgett layer Experimental study Amphiphilic compound
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Description
Summary:	An alternative strategy for achieving macroscopic non-centrosymmetric order in Langmuir-Blodgett multilayers is demonstrated. It is found that the addition of a second hydrophobic endgroup to the hydrophilic chromophore reduces the tendency of the molecules to invert during deposition.
ISSN:	0028-0836 1476-4687
DOI:	10.1038/368438a0