Iron catalyzed gas-phased disproportionation of carbon monoxide under high pressure is known to produce carbon Single Walled Nano-Tubes (SWNT). Non-tubular carbon by products and iron encapsulated-graphitic shelled nano-particles are produced concomitantly under conditions optimized for SWNT production, are undesirable bi-products.
Differences in oxidation thresholds of the constituents and acid leaching of iron particles have been exploited in the co-development of Laser Desorption Ionization Mass Spectroscopy (LDI) evaluation and SWNT purification.
LDI threshold conditions have been established for the analysis of non-SWNT carbon species. It has been shown that neither photochemical decomposition nor photo assisted molecular self-assembly contribute to the mass spectra.
Raw, processed materials and molecular specific extractions are evaluated. Laser Desorption Ionization mass spectroscopy, Transmission Electron Microscopy, Raman and TGA results are reported.
| Identifer | oai:union.ndltd.org:RICE/oai:scholarship.rice.edu:1911/17658 |
| Date | January 2004 |
| Creators | Brinson, Bruce E. |
| Contributors | Johnson, Marie Pontier |
| Source Sets | Rice University |
| Language | English |
| Detected Language | English |
| Type | Thesis, Text |
| Format | 112 p., application/pdf |
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