Anisotropic light transmission of aligned carbon nanotube sheets coated substrates

MD Asiqur Rahman, Ji Hyun Park, Kieu Thuy Truong, Dongseok Suh, Giusy Scalia

Abstract


We have performed optical investigations of layers formed by sheets of aligned multi-wall carbon nanotubes (MWCNTs). Nanotubes have extraordinary mechanical, electrical and optical properties when they are unidirectionally oriented. Free-standing CNT sheets drawn mechanically from vertically-grown MWCNT forests can be deposited on glass substrates, with nanotube bundles mostly oriented in the drawing direction. These CNT sheet layers have optical anisotropy, which can be detectable even for a single CNT sheet. We have studied the optical anisotropy in transmission, finding a similar value at different length scales indicating similarities in the orientational order of the nanotubes, thus preservation of their average degree of order. Finally, light transmission was observed when the samples were at 45 deg between crossed polarizers.

Full Text: PDF

References
  1. S. Iijima, "Helical microtubules of graphitic carbon", Nature 354, 56 (1991). CrossRef
  2. S. Iijima, "Structural flexibility of carbon nanotubes", J. Chem. Phys. 104, 2089 (1996). CrossRef
  3. T.K. Truong et al., "Multifunctional characterization of carbon nanotube sheets, yarns, and their composites", Curr. Appl. Phys. 16, 1250 (2016). CrossRef
  4. L. Ren et al., "Carbon Nanotube Terahertz Polarizer", Nano Lett. 9, 7 (2009). CrossRef
  5. J. Kyoung et al., "A Reel-Wound Carbon Nanotube Polarizer for Terahertz Frequencies", Nano Lett. 11, 10 (2011). CrossRef
  6. M. Zhang et al., "Strong, Transparent, Multifunctional, Carbon Nanotube Sheets", Science 309, 5738 (2005). CrossRef
  7. K. Jiang, Q. Li, S. Fan, "Nanotechnology: Spinning continuous carbon nanotube yarns", Nature 419, 801 (2002). CrossRef

Full Text:

PDF

We use cookies that are necessary for the website to function and cannot be switched off in our systems. Click here for more information.


Photonics Letters of Poland - A Publication of the Photonics Society of Poland
Published in cooperation with SPIE

ISSN: 2080-2242