Size control of carbon grains and their optical properties
Abstract
The influence of oxygen on the size of carbon grains produced by an arc discharge is investigated. Sizes of the microcrystallites can be controlled in the range of 10-60 Å by introducing oxygen gas into the inert gas. Effective growth conditions for C 60 crystals contained in the specimen are also given. IR spectra were measured for carbon grains containing C 60 crystals. In addition to absorption peaks due to C 60 molecules, many absorption peaks corresponding to unidentified I R bands appeared, but not the peak at 7.7 μm. It has been shown that the peak at 21 μm disappears after heat treatment of the specimen in air.
- Publication:
-
Planetary and Space Science
- Pub Date:
- February 1995
- DOI:
- 10.1016/0032-0633(95)00052-7
- Bibcode:
- 1995P&SS...43.1303S