The Production of CNT Flower-Like Structures with 3-Fold and 4-Fold Symmetries on a Pt/Si Substrate

• 作者: Christophe Ramseyer Jean-Christophe Valmalette Madjid Arab Marjorie David
• 来源期刊: 化学工程与科学期刊(英文)
• 学科: 化学
• 关键词: Carbon NANOTUBE Aerosol-CVD 3-Fold and 4-Fold SYMMETRIES FLOWER Shape
• 年，卷（期）: 2013,（1）
• 页码范围: 78-81
• 页数: 4页
• 分类号: O6

摘要

Carbon nanotubes flower (CNTs-F) films were prepared by catalytic chemical vapor deposition (CVD) on a platinum (Pt) thin layer, supported on a silicon wafer. The products were synthesized from an aerosol composed of ferrocene and toluene, as catalyst and carbon precursor respectively, at 820. The high synthesis temperature induces a modification of a Pt thin layer to a nano-structured island giving rise to the formation of CNTs-F during the following films growth step by CVD process. The suggested mechanism involves the selective diffusion of the catalyst and carbon atoms through the Pt grain boundaries. This results in the appearance of flower-like structures with 3-and 4-fold symmetries.