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Defence of dissertation in the field of Engineering Physics, Aqeel Hussain, M.Sc.

Structure controlled growth of one-dimensional carbon nanomaterials

The dissertation “Synthesis and applications of single walled carbon nanotubes from ethylene as carbon source” focuses on the strategies to control the morphology and atomic structure of SWCNTs using ethylene as carbon source.

Carbon nanotubes are one of the allotrope of carbon. Due to their exceptional electronic properties, single walled carbon nanotubes (SWCNTs) have applications in thin film transistor, photovoltaics and energy conversion.

This dissertation reveals the strategies to control the morphology and atomic structure of SWCNTs. For the first time ethylene alone is used as carbon source in floating catalyst CVD (FCCVD). Due to improvements in the morphology of SWCNTs, the FCCVD process produced one of the highest conductivity transparent SWCNT films. To control the structure of SWCNTs, water is used as growth promoter in ethylene based FCCVD. The water assisted process obviously controlled the atomic structure of SWCNTs and produced them in highly uniform structure. This thesis also studies the synthesis of SWCNTs/graphene hybrid and their interaction at the interface.

The high conductivity transparent SWCNT films have application for replacement of industry standard indium tin oxide in flexible electronics.

Opponent: Dr. Don N. Futaba, National Institute of Advanced Industrial Science and Technology, Japan

Custos: Professor Esko Kauppinen, Aalto University School of Science, Department of Applied Physics

Contact information: Aqeel Hussain, Aalto University School of Science, Department of Applied Physics, [email protected], +358504644271

The dissertation is publicly displayed 10 days before the defence at the noticeboard of the School of Science in Konemiehentie 2, Espoo.

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