Events

Synthesis and Application of 1-Dimensional Carbon Nanomaterials - Development of a New X-Ray Source

Date: 28 Sep 2004 - 28 Sep 2004

Venue: SIMTech, Tower Block, Auditorium, Level 3

Abstract

The basic design of the x-ray source and the core component in x-ray radiography have undergone little change since the proposal by Coolidge in 1913, i.e., thermionically emitted electrons are accelerated to bombard a metal target so as to generate x rays. Theoretically, the smaller the x-ray radiating area or the focal point, the higher the image resolution. Thus, fine focusing of the electron beam is essential for obtaining high-resolution x-ray images. To achieve this, we propose a new x-ray source which operates based on field electron emission. With high aspect ratios, small tip radii of curvature and high chemical stability, carbon nanomaterials such as carbon nanotubes (CNTs) and carbon nanofibres (CNFs) are one of the best-suited candidates as a field electron emission source. In this seminar, a newly developed x-ray radiography system with a CNT-electron source will be presented, together with the details of the CNT synthesis by plasma-enhanced chemical vapour deposition. In addition, the latest results on the field emission property obtained for room-temperature grown CNFs will be shown.

 

About the speaker 

Dr Masaki Tanemura is an Associate Professor in Nagoya Institute of Technology (NIT), Japan, since 1994. He received a M.Sc. degree in engineering from NIT, Japan, in 1983, and a Ph.D. degree from NIT, Japan, in 1988. Before joining NIT in 1991, he worked at Toyota Central Research and Development Laboratories, Inc., Aichi, Japan from 1983 to 1990. He also joined the group of Prof Wandelt in Bonn University, Germany, from 1996 to 1997, as an Alexander von Humboldt Fellow. He has more than 10 years of experience with precise surface- and bulk-analyses of materials. His recent research activities include the synthesis of 1-dimensional nanomaterials based on ion-solid interactions and their applications. He has been developing novel approaches to fabricate carbon nanofibres and semiconductor nanostructures (Si, InP). Dr Masaki Tanemura is a member of the editorial board for the Journal of Surface Science Society of Japan.

 

Who should attend :

For those engaged in material R&D, electronic and semiconductor device analysis and X-ray system development.

Admission is free.

Please register by 27 September, Monday with your name, designation, company name, contact no. & email address.