Langmuir and Langmuir-Blodgett films of di-ureasil hybrid compounds containing phosphotungstic acid

Autor(es)

Teles Rossini, Cabo Vinicius ; Molina, Celso ; Caseli, Luciano

• Tipo de documento: Artigo Científico
• Fonte: COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS; v. 524, p. 35-42, JUL 5 2017.
• Citações Web of Science: 7

Resumo

The search for new molecular architectures to improve the efficiency of sensors and optoelectronic devices is fundamental to enhance the effectiveness of nanostructured materials. In this present work, a di-ureasil hybrid compound (DUPTS) was spread at the air-water interface in order to form Langmuir monolayers. Phosphotungstic acid, H3PW12O40, PWA inserted in the aqueous subphase stabilized the formation of DUPTS as a stable Langmuir film, as showed with surface pressure and surface potential-area isotherms, rheological measurements, polarization modulation reflection-absorption spectroscopy, and Brewster angle microscopy. The monolayers were transferred to solid supports as Langmuir-Blodgett films and presented different patterns of heterogeneity as observed with atomic force microscopy, with the morphology dependent on the presence of PWA and on the kind of solid support surface. (AU)

• Processo FAPESP: 15/23446-0 - Superfícies inteligentes nanoestruturadas e bioinspiradas: investigação de interações em modelos de membrana e produção de dispositivos para biossensores e análise ambiental.
• Beneficiário: Luciano Caseli
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 13/14262-7 - Filmes nanoestruturados de materiais de interesse biológico
• Beneficiário: Osvaldo Novais de Oliveira Junior
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 14/12557-2 - EMU concedido no processo 2013/14262-7; reômetro interfacial
• Beneficiário: Osvaldo Novais de Oliveira Junior
• Modalidade de apoio: Auxílio à Pesquisa - Programa Equipamentos Multiusuários