Investigating the Catalytic Growth of Carbon Nanotubes with In Situ Raman Monitoring
TON DUC THANG University
Investigating the Catalytic Growth of Carbon Nanotubes with In Situ Raman Monitoring
Author:
Jourdain, Vincent
;
Maruyama, Benji
Subjects:
CARBON NANOTUBES
;
CATALYSTS
;
CHIRAL SELECTIVITY
;
GROWTH(GENERAL)
;
MECHANICAL
PROPERTIES
;
MONITORING
;
PE61102F
;
Refractory Fibers
;
SCANNING ELECTRON MICROSCOPES
;
STRUCTURAL
PROPERTIES
;
SWCNTS(SINGLE-WALLED CARBON NANOTUBES)
Description:
The objectives of this project were to identify the processes responsible for growth termination, creation and healing of defects, and chiral selectivity of single-walled carbon nanotubes, in order to develop strategies to increase nanotube length, improve the structural quality of samples, and improve the metallic semiconducting ratio of samples. Using in situ Raman measurements and scanning electron microscopy, we showed that reaction of the catalyst with support to form more refractor compounts can increase growth selectivity, showed that catalyst ripening, nanotube nucleation, and catalyst encapsulation can affect diameter and chirality, and showed that exposure to oxygen may be causing defects in growth. The original document contains color images.
Creation Date:
2015
Language:
English
Source:
DTIC Technical Reports