| Autor: |
Yang ZP; The Future Chips Constellation & Department of Physics, Applied Physics and Astronomy, Rensselaer Polytechnic Institute, Troy, New York 12180, USA., Ci L, Bur JA, Lin SY, Ajayan PM |
| Jazyk: |
angličtina |
| Zdroj: |
Nano letters [Nano Lett] 2008 Feb; Vol. 8 (2), pp. 446-51. Date of Electronic Publication: 2008 Jan 09. |
| DOI: |
10.1021/nl072369t |
| Abstrakt: |
An ideal black material absorbs light perfectly at all angles and over all wavelengths. Here, we show that low-density vertically aligned carbon nanotube arrays can be engineered to have an extremely low index of refraction, as predicted recently by theory [Garcia-Vidal, F. J.; Pitarke, J. M.; Pendry, J. B. Phys. Rev. Lett. 1997, 78, 4289-4292] and, combined with the nanoscale surface roughness of the arrays, can produce a near-perfect optical absorption material. An ultralow diffused reflectance of 1 x 10(-7) measured from such arrays is an order-of-magnitude lower compared to commercial low-reflectance standard carbon. The corresponding integrated total reflectance of 0.045% from the nanotube arrays is three times lower than the lowest-ever reported values of optical reflectance from any material, making it the darkest man-made material ever. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
|
