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In this study, the application of a solid-phase microextraction (SPME) fiber which was fabricated by electrolytically depositing polypyrrole (PPy) on a NiTi alloy support was investigated.

The characteristics of cobalt antidot structures, electrodeposited on Si by nanosphere lithography, is investigated by analysis of current transients and optical and atomic force microscopy. Polystyrene colloidal masks of 1 ML (monolayer) or a maximum of 2, with sphere diameters ranging between 165 and 600nm were fabricated by spin coating. For masks partially covered with bilayer regions, it is shown that the volume of deposited material in bilayer areas corresponds to only 5% of the cobalt deposited in the monolayer areas. This drastic reduction in the deposition rate affects the quality of the deposit. Therefore, the use of colloidal masks of homogeneous thickness is necessary to guarantee the electrodeposition of nanostructured films of controlled thickness. It will also be shown that the use of high quality colloidal masks yields a reproducible electrodeposition process, enabling the use of the current transient as a reliable tool for assessment of the deposition process.

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Este artigo apresenta os resultados de um projeto onde foram aplicados robôs do kit LEGO como ferramenta didática no ensino de física e matemática para auxiliar a aprendizagem nas disciplinas do nível médio das estudantes da Escola de Ensino Médio Macário Borba localizada em Sombrio-SC. Este curso teve duração de 3 (três) meses e as estudantes resolveram exercícios práticos sobre cinemática, equações algébricas e conservação de energia utilizando projetos de robôs que facilitassem o entendimento. Como resultado percebeu-se a grande motivação das estudantes ao aprenderem de uma maneira mais didática e motivadora, conteúdos considerados complicados.