Center for Functional Nanomaterials Seminar

"Application of the Environmental Transmission Electron Microscopy Technique to Address Chirality Control and Growth Termination in Carbon Nanotubes"

Presented by Dmitri Zakharov, Purdue University

Thursday, October 14, 2010, 10:00 am — Bldg. 735 - Conf Rm B

Environmental Transmission Microscopy (ETEM) is a technique that has attracted substantial recent interest, and has significant potential to advance research in the field of catalysis. The Birck Nanotechnology Center at Purdue University installed the first ETEM version of the Titan 80-300 TEM/STEM. A number of experimental modifications to the microscope vacuum system, heating holders and gas delivery systems were carried out to improve overall system performance and repeatability of experiments. The above modifications will be discussed along with scientific results and observations of carbon nanotube nucleation, chirality selection and growth termination. The benefits attained from linking controlled real time in-situ observations of catalyst morphological evolution with equivalent quantitative measurements derived from more standard approaches will be presented.

Hosted by: Eric Stach

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