dc.contributor.advisor | Komanduri, Ranga | |
dc.contributor.author | Ramakrishnan Venkatanath, Hariprasad | |
dc.date.accessioned | 2014-04-17T19:53:49Z | |
dc.date.available | 2014-04-17T19:53:49Z | |
dc.date.issued | 2005-12-01 | |
dc.identifier.uri | https://hdl.handle.net/11244/10039 | |
dc.description.abstract | Carbon nanotubes (CNT) are obtained by vaporizing graphite in an inert atmosphere using the arc-discharge method. Helium is found to be a favorable buffer gas for the synthesis of MWNTs compared to argon. Maximum yield of cathode deposit is obtained when the chamber pressure is maintained between 315-355 torr. Purification study of MWNTs showed that heating at 7500 C for 5 mins or 7000 C for 15 mins are desirable conditions for removing amorphous carbon. The vaporization of graphite with 4% Ni-1% Y in a helium atmosphere leads to the formation of SWNTs. The growth of SWNT bundles strongly depends on the chamber pressure. CNT bundles are formed in helium at a pressure in the range of 315-506 torr. Maximum yield was obtained when the helium pressure was 506 torr, at a flow rate of 2l/min. The nucleation and growth of SWNT bundles are explained according the vapor-liquid-solid (V-L-S) model. | |
dc.format | application/pdf | |
dc.language | en_US | |
dc.publisher | Oklahoma State University | |
dc.rights | Copyright is held by the author who has granted the Oklahoma State University Library the non-exclusive right to share this material in its institutional repository. Contact Digital Library Services at lib-dls@okstate.edu or 405-744-9161 for the permission policy on the use, reproduction or distribution of this material. | |
dc.title | Experimental investigation on the synthesis of carbon nanotubes (CNTs) by arc-discharge method using a MIG welder | |
dc.type | text | |
dc.contributor.committeeMember | Lu, Hongbing | |
dc.contributor.committeeMember | Price, C. E. | |
osu.filename | RamakrishnanVenkatanath_okstate_0664M_10560.pdf | |
osu.college | Engineering, Architecture, and Technology | |
osu.accesstype | Open Access | |
dc.description.department | Mechanical & Aerospace Engineering | |
dc.type.genre | Thesis | |
dc.subject.keywords | arc discharge | |
dc.subject.keywords | arc-discharge | |
dc.subject.keywords | carbon nanotubes | |
dc.subject.keywords | nano | |
dc.subject.keywords | nanotube | |