Long Nanofibers Arrays Through Surfactant Self-Assembly

Autor(es)

Teschke, Omar ^[1] ; de Souza, Elizabeth Fatima ^[2]

Afiliação do(s) autor(es)

^[1] Univ Estadual Campinas, Lab Nanoestruturas & Interfaces, Inst Fis, BR-13083970 Campinas, SP - Brazil

^[2] Pontificia Univ Catolica Campinas, Fac Quim, BR-13012970 Campinas, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Journal of Nanoscience and Nanotechnology; v. 10, n. 2, p. 784-790, FEB 2010.
• Citações Web of Science: 0

Resumo

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. (AU)

• Processo FAPESP: 03/12529-4 - Nanotecnologia: fabricação de nanoestruturas e estruturas supramoleculares em meio líquido: observação das estruturas formadas e investigação dos processos de formação de nanoestruturas
• Beneficiário: Omar Teschke
• Modalidade de apoio: Auxílio à Pesquisa - Temático