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Type: Artigo de periódico
Title: Long Nanofibers Arrays Through Surfactant Self-Assembly
Author: Teschke, O
de Souza, EF
Abstract: Self assembly of molecules can be a simple and versatile approach that may lead to nanostructures. Here we report the formation of arrangements of exceptionally long nanofibers of cationic surfactant hexadecyltrimethylammonium bromide molecules with highly defined spatial and parallel ordering. Arrangements of similar to 1 mu m long nanofibers were observed by non-contact atomic force microscopy. The long nanofiber patterns form structures in similar to 5x5 mu m(2) regions and consist of similar to 6 nm wide lines. The formation mechanism of the fibers is shown to be the coalescence of isolated surfactant micelles (similar to 3.2 nm diameter in solution) in the convection stream of the surfactant solution drop close to the pinned contact-line region during drying. The size of micelles formed in solution determines the diameter of the deposited fibers. New deposition schemes of micelles forming nanorods on bare silicon previous to the formation of surfactant bilayers are now being investigated based on the data obtained in this work.
Subject: Parallel Ordering
Molecular Imaging
Isolated Surfactant Nanofibers
C(16)TAB Molecular Arrangement
Country: EUA
Editor: Amer Scientific Publishers
Rights: fechado
Identifier DOI: 10.1166/jnn.2010.1885
Date Issue: 2010
Appears in Collections:Unicamp - Artigos e Outros Documentos

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