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Energia e educação em ciências para a cidadania : dos interesses dos alunos às ...

Energia é um tema central em ciências e que está associado a problemáticas complexas e relevantes para as sociedades modernas. Nos diversos países, é abordado, de modo diferenciado, em diferentes níveis de escolaridade. Em Portugal a abordagem é efectuada, entre outros, no 3° ciclo do Ensino Básico, último nível de escolaridade destinado a todos os cidadãos. Com a sua abordagem pretende-se, entre outros, sensib...

Raman analysis of Si–C–N films grown by reactive magnetron sputtering

Silicon carbon nitride thin films have been deposited by reactive magnetron sputtering of silicon and graphite targets in mixed Ar/N2 atmosphere at substrate temperature of 300 °C. The substrate bias voltage varied from -50 up to +50 Vand the nitrogen flow rate varied from 0 to 20 sccm. The as-deposited films were analyzed by Raman spectroscopy (RS) and X-ray photoelectron spectroscopy (XPS). The Raman analyses...

Effect of substrate bias voltage on amorphous Si–C–N films produced by PVD tech...

SixCyNz thin films were deposited by reactive magnetron sputtering in glass and steel substrates. The films were grown in a rotation mode over a carbon and a silicon targets in a mixed Ar/N2 atmosphere. The substrates were held at a substrate temperature of 573 K. The argon flow was kept constant (100 sccm) and the nitrogen flow was 20 sccm or 25 sccm, in each one of the two series of produced films, resulting ...

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