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A self-supported carbon nanotubes (SSCNTs) with nanoscopic properties and controlled macroscopic shape were synthesized by a Chemical Vapour Deposition (CVD) method using a mixture of ethane/hydrogen and a Fe/Al 2 O 3 growth catalyst. The SSCTs were obtained in the form of beads of 6–8mm in diameter, with a hollow core structure and a high and fully accessible specific surface area,...
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