Effects of carbon nanosolids on the electro-optical properties of a twisted nematic liquid-crystal host

Wei Lee; Chun-Yu Wang; Yu-Cheng Shih
July 2004
Applied Physics Letters;7/26/2004, Vol. 85 Issue 4, p513
Academic Journal
We present results of the electro-optical effect in 90° twisted nematic cells of pristine and doped liquid crystals under an applied dc voltage. The doped cells were fabricated with a minute addition of either buckminsterfullerene C60 or multiwalled carbon nanotubes (CNTs). Investigated were the switching behaviors as well as the hystereses and time evolutions of both the optical transmittance and electrical capacitance of the display samples. It is shown that doping with nanotubes can effectively reduce the dc driving voltage and improve the switching behavior.


Related Articles

  • Electro-optical properties of planar nematic cells impregnated with carbon nanosolids. Lee, W.; Gau, J.-S.; Chen, H.-Y. // Applied Physics B: Lasers & Optics;Jul2005 Part 2, Vol. 81 Issue 2/3, p171 

    We report electro-optical effects in planar-aligned liquid-crystal cells of pristine and doped calamitics in the presence of dc voltage. The doped cells comprise both a nematic host and a minute amount of either buckminsterfullerene or multiwalled carbon nanotubes. The...

  • Visualization of liquid crystal director fields within carbon nanotube cavities. Jian, Kengqing; Hurt, Robert H.; Sheldon, Brian W.; Crawford, Gregory P. // Applied Physics Letters;4/17/2006, Vol. 88 Issue 16, p163110 

    Multiwall carbon nanotube cavities were infiltrated with naphthalene polymer which exhibits a discotic nematic liquid crystal phase. The liquid crystal phase is covalently captured by thermal carbonization. High resolution transmission electron microscope images reveal a planar configuration...

  • Patterning lyotropic liquid crystals as precursors for carbon nanotube arrays. Sousa, M. E.; Cloutier, S. G.; Jian, K. Q.; Weissman, B. S.; Hurt, R. H.; Crawford, G. P. // Applied Physics Letters;10/24/2005, Vol. 87 Issue 17, p173115 

    We report on a simple patterning technique using lyotropic liquid-crystal solutions to fabricate organized arrays of high aspect ratio carbon nanostructures. An automated pen writing system is used in conjunction with nanochannel alumina templates to produce ordered arrays of nanotubes and...

  • Transparent carbon nanotube-based driving electrodes for liquid crystal dispersion display devices. Chan Yu King, R.; Roussel, F. // Applied Physics A: Materials Science & Processing;Jan2006, Vol. 86 Issue 2, p159 

    We report the fabrication of transparent rigid or flexible liquid crystal dispersion displays driven by electrodes prepared from coating inert substrates with stable aqueous suspensions of single-walled carbon nanotubes (SWNTs) or multiple-walled carbon nanotubes (MWNTs). The SWNT-coated...

  • Carbon nanotube dispersed liquid crystal: A nano electromechanical system. Basu, Rajratan; Iannacchione, Germano S. // Applied Physics Letters;11/3/2008, Vol. 93 Issue 18, p183105 

    Electric field induced director orientation of a nematic liquid crystal (LC)+carbon nanotube (CNT) system reveals insights on switching behavior for this anisotropic composite. Once the field goes off, the LC+CNT system relaxes back to the original orientation through a mechanical rotation,...

  • Recent Progress of Carbon Nanotube Field Emitters and Their Application. Seelaboyina, Raghunandan; Choi, Wonbong // Recent Patents on Nanotechnology;Nov2007, Vol. 1 Issue 3, p238 

    The potential of utilizing carbon nanotube field emission properties is an attractive feature for future vacuum electronic devices including: high power microwave, miniature x-ray, backlight for liquid crystal displays and flat panel displays. Their high emission current, nano scale geometry,...

  • On the possibility of a homeotropic alignment in nematic liquid crystal elements using carbon nanotubes. Kamanina, N. V.; Vasilyev, P. Ya. // Technical Physics Letters;Jun2009, Vol. 35 Issue 6, p501 

    The possibility of obtaining homeotropic orientation in thin-film nematic liquid crystal (NLC) cells using carbon nanotubes is briefly considered. The results of this investigation can be used to develop optical elements for displays with vertical orientations of NLC molecules (MVA-display...

  • Understanding the observation of large electrical conductivity in liquid crystal-carbon nanotube composites. Jayalakshmi, V.; Prasad, S. Krishna // Applied Physics Letters;5/18/2009, Vol. 94 Issue 20, p202106 

    We report the electrical conductivity and dielectric constant measurements in composites of single-walled carbon nanotubes (CNTs) with nematic liquid crystals, employing electrical and magnetic fields as reorienting fields. Our studies demonstrate that the large magnitude of enhancement in the...

  • Effects of conducting polymer poly(3, 4-ethylenedioxythiophene) nanotubes on the electro-optical and dielectric properties of a nematic liquid crystal 4-n-pentyl-4′-cyanobiphenyl host. Ghosh, Sharmistha; Nayek, Prasenjit; Roy, Subir Kr.; Gangopadhyay, Rupali; Molla, Mijanur Rahaman; Dabrowski, Roman // Applied Physics Letters;2/15/2010, Vol. 96 Issue 7, p073101 

    We report the results of the optical transmission and the capacitance behavior as a function dc electric field of a pristine liquid crystal and conducting polymer nanotube-liquid crystal composite measured in twisted nematic cells. The threshold and driving voltages have been determined from...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics