Midgap luminescence centers in single-wall carbon nanotubes created by ultraviolet illumination
Abstract
The authors report the effect of ultraviolet (UV) illumination on optical properties of single-wall carbon nanotubes (SWCNTs) isolated using various dispersants. It is demonstrated that even weak UV light (∼1mW/cm2) can irreversibly alter the SWCNT structure, thus resulting in the emergence of hitherto unknown, redshifted photoluminescence (PL) peaks with concomitant reduction in some of the original PL peaks. These UV-induced changes are characterized in detail and attributed to the creation of midgap PL centers.
- Publication:
-
Applied Physics Letters
- Pub Date:
- October 2006
- DOI:
- Bibcode:
- 2006ApPhL..89q3108I
- Keywords:
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- 78.67.Ch;
- 61.46.Fg;
- 78.55.Hx;
- 61.80.Ba;
- Nanotubes;
- Nanotubes;
- Other solid inorganic materials;
- Ultraviolet visible and infrared radiation effects