Langmuir Blodgett Films
Mostrando 1-12 de 44 artigos, teses e dissertações.
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1. Heterostructured Langmuir-Blodgett Films of Ruthenium Bipyridine with 1,3,4-Naphthooxadiazole-Derived Amphiphile Complex as a Charge Storage Electrode
The molecular control in Langmuir-Blodgett (LB) films may be exploited in charge storage electrodes provided a suitable choice of molecular architecture and components is made. In this paper, we employed a naphtyl-1,3,4-oxadiazole amphiphile (NFT1) and its complex [Ru(bpy)2NFT1]PF6 (RuNFT1) (bpy = 2,2’-bipyridine) in heterostructured LB films in a proof-of
J. Braz. Chem. Soc.. Publicado em: 2020-11
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2. Metallic Phthalocyanines: impact of the film deposition method on its supramolecular arrangement and sensor performance
Abstract This short review gives a concise overview of the impact of deposition methods on the supramolecular arrangement of metallic phthalocyanine films and their applications. Primarily, an introduction about the possible phthalocyanine molecular structures and derivatives obtained from modification on the phthalocyanine rings was presented. The possibili
An. Acad. Bras. Ciênc.. Publicado em: 25/11/2019
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3. The Influence of Different Ammonium Cations on the Optical Properties of Tetrakis GdIII and EuIII Complexes
A series of tetrakis-β-diketonate Q+[Ln(β-dik)4]–, where Ln = GdIII or EuIII, Q = ammonium cations and β-dik = tta (2-thenoyltrifluoracetone) or bmdm (1-(4-tert-butylphenyl)-3-(4-methoxyphenyl)-1,3-propanedione) have been synthesized and characterized. The environment surrounding the EuIII ion depends on the lateral groups of the ligand and on the alkyl
J. Braz. Chem. Soc.. Publicado em: 12/08/2019
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4. Enzymes immobilized in Langmuir-Blodgett films: Why determining the surface properties in Langmuir monolayer is important?
ABSTRACT In this review we discuss about the immobilization of enzymes in Langmuir-Blodgett films in order to determine the catalytic properties of these biomacromolecules when adsorbed on solid supports. Usually, the conformation of enzymes depends on the environmental conditions imposed to them, including the chemical composition of the matrix, and the mor
An. Acad. Bras. Ciênc.. Publicado em: 11/01/2018
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5. Dynamics of Drop Impact Against Surfaces Covered with Langmuir-Blodgett Layers
The dynamics of sucessive impacts of water droplets against flat glass surfaces covered by Langmuir-Blodgett films of zinc stearate with 1, 3, 5 and 7 layers was investigated. The structure and resistance of monolayers to the impact was evaluated by using fast images of the drop deformation, Brewster angle microscopy (BAM) and contact angle measurements. Eve
J. Braz. Chem. Soc.. Publicado em: 2016-02
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6. Poly(3-octylthiophene)/stearic Acid Langmuir and Langmuir-Blodgett films: Preparation and characterization
A study is reported on Langmuir and Langmuir-Blodgett (LB) films obtained by adding different percentages of stearic acid (SA) to poly(3-octylhiophene) (P3OT). Surface pressure - mean molecular area (π - A) isotherms, ultraviolet-visible (UV-Vis) absorption spectrum, atomic force microscope (AFM) and dc electrical measurements have been used for characteriz
Mat. Res.. Publicado em: 2014-12
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7. Supramolecular arrangements of an organometallic forming nanostructured films
Organometallic materials have become subject of intensive research on distinct technological applications. The Langmuir-Blodgett (LB) and Langmuir-Schaefer (LS) techniques have proven to be suitable to address challenges inherent to organic devices, in which the film properties can be tuned at molecular level. Here, we report on the supramolecular arrangemen
Mat. Res.. Publicado em: 2014-12
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8. Urea decreases specific ion effects on the LCST of PMMA-block-PDMAEMA aggregates
Urea is a well-known additive used as a mild protein denaturant. The effect of urea on proteins, micellar systems and other colloids is still under debate. In particular, urea has shown interesting effects on the ion binding in systems like charged micelles, vesicles or Langmuir-Blodgett films. The urea effect on polymeric aggregates in water is still an ope
Polímeros. Publicado em: 2014-12
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9. Síntese de azopolímero e preparação de misturas para aplicações em optoeletrônicos / Synthesis of an azopolymer and preparation of blends for applications in optoelectronic
Materiais poliméricos com propriedades de fotoisomerização, como os azopolímeros, apresentam grande potencial para aplicações em óptica não linear e dispositivos opto-eletrônicos. Entretanto há limitações para a aplicação dos azopolímeros devido à tendência à agregação dos cromóforos e dificuldade de formação de filmes. A mistura do az
Publicado em: 2011
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10. Estudo de filmes de Langmuir e Langmuir-Blodgett de aminas anfifílicas utilizando a espectroscopia SFG / The interaction of water with Langmuir films of amphiphilic amines as a function of pH probed by Pi-A isotherms and SFG spectroscopy
O estudo da interação de moléculas orgânicas com a água é de grande importância para diversas áreas das ciências, como por exemplo, na compreensão de sistemas biológicos. Uma elevada diversidade de estudos nesta área já foram realizados, no entanto, alguns aspectos do estudo de filmes finos de aminas anfifílicas não foram satisfatoriamente esc
Publicado em: 2010
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11. Synthesis and fabrication of thin films of copolymer contains azobenzene for hydrophobic surface / Síntese e fabricação de filmes finos de copolímeros contendo azobenzenos para superfícies hidrofóbicas
A funcionalização de materiais poliméricos para a produção de superfícies superhidrofóbicas é importante para uma série de aplicações, principalmente as associadas com superfícies autolimpantes e anti-aderentes. Uma abordagem para obter superhidrofobicidade é combinar polímeros hidrofóbicos com outros materiais passíveis de ser microestrutura
Publicado em: 2010
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12. Interação entre quitosana e modelos de membrana celular: filmes de Langmuir e Langmuir-Blodgett (LB) / Interaction between chitosan and cell membrane models: Langmuir and Langmuir-Blodgett (LB) films.
Quitosana é um polissacarídeo usado em diversas aplicações biológicas, por exemplo, em liberação controlada de drogas, transfecção, aceleração da cicatrização de feridas e como agente bactericida, entre outras. Em todas essas aplicações, o polímero interage com tecidos e células. Entretanto, embora sua ação seja comprovada, os mecanismos d
Publicado em: 2010