CUED Publications database

Carbon onions: Carriers of the 217.5 nm interstellar absorption feature

Chhowalla, M and Wang, H and Sano, N and Teo, KBK and Lee, SB and Amaratunga, GAJ (2003) Carbon onions: Carriers of the 217.5 nm interstellar absorption feature. Physical Review Letters, 90. 155504/1-155504/4. ISSN 0031-9007

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Abstract

The UV-VIS characteristics of carbon ions fabricated by an arch discharge in water or liquid nitrogen show characteristics that are similar to the interstellar absorption feature. Thus, high purity and well separated carbon onion samples prepared by annealing the as-fabricated powder in air at 600°C for 60 showed a constant absorption peak at 4.6 μm-1 with a variable width ranging from 1.2-1.6 μm-1. In addition to the UV-VIS data, the origin of the absorption feature at 4.6 μm-1 in carbon onions can be attributed to the collective excitations of π plasmons.

Item Type: Article
Subjects: UNSPECIFIED
Divisions: Div B > Electronics, Power & Energy Conversion
Depositing User: Cron Job
Date Deposited: 07 Mar 2014 11:22
Last Modified: 16 Dec 2014 19:05
DOI: