Semimetal to Semiconductor Transition in Carbon Nanoparticles
- Department of Physics, Pennsylvania State University, University Park, Pennsylvania 16802 (United States)
Electron energy loss spectroscopy (EELS) has been used to observe size dependent changes in the electronic states of isolated, nanocrystalline carbon particles supported on SiO{sub 2} substrates. The structure and size distribution of the particles have been characterized by Raman scattering, Auger electron spectroscopy, and electron microscopy. EELS observations indicate that a semimetal to semiconductor transition occurs for particles smaller than 1nm. In addition, hydrogen adsorption is found to significantly alter the electronic states, demonstrating that both finite size and dangling bond effects modify the properties of small carbon nanocrystallites. {copyright} {ital 1998} {ital The American Physical Society}
- DOE Contract Number:
- FG02-84ER45095
- OSTI ID:
- 603142
- Journal Information:
- Physical Review Letters, Vol. 80, Issue 19; Other Information: PBD: May 1998
- Country of Publication:
- United States
- Language:
- English
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