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Seminar «Carbon nanotubes: from synthesis to applications»

Prof Albert G Nasibulin
January 20, 2014
13.00 – 14.30
Beijing – 1 Auditorium, China cluster (Skolkovo School of Management)

SEMINAR ABSTRACT:
Among different routes to synthesize single-walled carbon nanotubes (SWCNTs), an aerosol CVD method is one of the most promising. This method allows growing high quality and clean SWCNTs with certain diameters and lengths. SWCNTs can be easily deposited onto practically any substrate, including temperature non-tolerant polymers, so that time-consuming steps of nanotube purification from the catalyst and support, dispersion and deposition processes are avoided. Supplementary advantages of the aerosol method are possibilities to on-line control of the CNT quality and separate individual and bundled SWCNTs. This continuous aerosol CVD process is one of the most promising and powerful methods for the high-yield synthesis at controlled conditions. This paper reviews the latest results obtained by two different aerosol synthesis methods elaborated in our group. In the first method, catalyst particles were produced by evaporating catalyst material from resistively heated Fe wire (a hot wire generator, HWG method). The second method is based on ferrocene vapor decomposition in carbon monoxide atmosphere.
We report the investigations of the mechanism of single-walled carbon nanotube formation and charging of SWCNTs in the gas phase due to the bundling process. Direct integration of the SWCNTs produced by the aerosol methods into different applications, especially for high-performance flexible electronics, is discussed. Produced SWCNT/polyethylene composite films have exhibited excellent optical and electrical properties as well as high mechanical flexibility. It was found that the electrical conductivity of the SWCNT films could be significantly improved by ethanol densification and chemical doping. SWCNT/polyethylene thin films demonstrated excellent cold electron field emission properties. We have fabricated state-of-the-art key components from the same single component multifunctional SWNT material for several high-impact application areas: high efficiency nanoparticle filters, transparent and conductive electrodes, electrochemical sensors with extremely low detection limits, and polymer-free saturable absorbers for ultrafast femtosecond lasers.
SPEAKER INTRODUCTION:
Dr. Sc. Albert G. Nasibulin is an Adjunct Professor at the Department of Applied Physics of Aalto University School of Science (former Helsinki University of Technology) and Academy Research Fellow (term 2006-2011). He got his PhD in Physical Chemistry (1996) at Kemerovo State University (Russia) and Doctor of Science (Habilitation, 2011) at Saint-Petersburg Technical State University (Russia).

He has specialized in the synthesis of nanomaterials (nanoparticles, carbon nanotubes and nanofibers and tetrapods), investigation of their growth mechanism and potential applications. His main recent research is devoted to transparent, flexible and conductive SWCNT films. He has a successful background in an academic research with 160 peer-reviewed scientific publications and 13 patents.

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