Journal
APPLIED SURFACE SCIENCE
Volume 257, Issue 12, Pages 5156-5158Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2010.10.074
Keywords
Polyyne; Laser ablation; Graphite
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Funding
- Kyung Hee University [KHU-20100117]
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Polyynes were prepared by liquid-phase laser ablation of a graphite target at 1064nm and identified by analyzing UV absorption spectra in deionized water and various aqueous solutions. We observed that major UV absorption peaks coincide with the electronic transitions corresponding to linear hydrogen-capped polyynes (CnH2: n = 6, 8, 10). The peak intensities increased when polyynes were produced by irradiating the target immersed in acidic media, while those were relatively weak in basic media. This leads us to conclude that OH-or H+ ions play a certain role in the formation of polyynes. (C) 2010 Elsevier B. V. All rights reserved.
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