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Organic thin films supramolecular architecture plays an essential factor in the performance of optical and electronic organic devices.

O foco deste artigo é em robótica educativa. Em particular, descreve-se neste artigo uma experiência de uso da linguagem Enchanting para programação de robôs que serão utilizados na execução de atividades didáticas relacionadas à Matemática. Enchanting é uma linguagem de programação visual que se mostrou adequada na programação dos kits de robôs Lego Mindstorms. O software é distribuído livremente, o que o torna atrativo para uso, por exemplo, em escolas da rede pública de ensino. Neste artigo detalha-se a metodologia usada para o seu uso na programação de robôs e resultados advindos do seu uso. Os autores entendem que o experimento realizado é pioneiro no Brasil, pois não é do conhecimento dos mesmos o uso de Enchanting em ambientes como o contextualizado neste artigo.

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The immobilization of the enzyme tyrosinase (Tyr) in lipid matrices can be explored to produce biosensors for detecting polyphenols, which is relevant for the food industry. Herein, we shall demonstrate the importance of the lipid composition to immobilize the enzyme tyrosinase in Langmuir-Blodgett (LB) fi lms. Tyr could be incorporated into Langmuir monolayers of arachidic acid (AA), 1,2-dipalmitoyl-sn-glycero-3-phosphocholine (DPPC) and 1,2-dipalmitoyl-sn-glycero-3-phospho-(1'-rac-glycerol) (sodium salt) (DPPG), having as the main effect an expansion in the monolayers. Results from polarization-modulated infrared refl ection-absorption spectroscopy (PM-IRRAS) pointed to electrostatic interactions between the charged residues of Try and the lipid headgroups, in addition to changes in the order of lipid chains. The interaction between Tyr and DPPC in Langmuir monolayers can be correlated with the superior performance of DPPC/Tyr LB fi lms used as biosensors to detect catechol by cyclic voltammetry. The molecular-level interactions assessed via PM-IRRAS are therefore believed to drive an immobilization process for Tyr in the lipid LB matrix and may serve as a general criterion to identify matrices that preserve enzyme activity.

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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 possibility of perfecting/improving the supramolecular arrangement of metallic phthalocyanine (MPcs) films by using different deposition techniques such as langmuir-Blodgett (lB), langmuir-Schaefer (lS), layer-by-layer (lbl), physical vapor deposition (PVD) and electrodeposition was discussed in further details. herein, we highlighted some techniques used on the characterization of supramolecular arrangement (morphology, optical properties, and molecular organization), including the impact on sensing applications. The main scope of this short review is focused on the advances made in this research field in the last five years.