Unusual double four-lobe textures generated by the motion of carbon nanotubes in a nematic liquid crystal

Abstract

Unusual double four-lobe nematic liquid crystal (LC) textures were observed in the carbon nanotube (CNT)-doped nematic LC under electric field. Through the electro-optical studies in a wide range of vertical electric fields in the direction of the long axis of the LC molecules, it was realized that the double four-lobe nematic LC textures were formed in the range of 120 to 160 V(rms) at 1 Hz. The formation of these unusual double four-lobe nematic LC textures could originate from the electric field-induced movement of CNTs and the subsequently frustrated reorientation of LCs.

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

“…2͑d͔͒. [19][20][21][22] No such patterns are observed in the undoped cell, indicating the fact that the dynamic response originated from PEDOT nanotubes, not from LC molecules. These patterns are formed due to the phase retardation of the LC medium and consequent light leakage caused by the perturbed LC directors due to the translational motion of the PEDOT nanotubes toward the maximum field gradient.…”

Enhanced Switching Behavior of Iron Oxide Nanoparticle-Doped Liquid-Crystal Display

“…[7][8][9] Recently, NPs 10 11 have been of particular interest to the display industry for their potential to influence device applications because of their unique electrical 12 and optical 13 14 properties. There have been, for example, numerous studies of the properties of NPs dispersed in liquid crystal (LC); such studies using NPs based on titanium, 15 zirconium oxide, 16 carbon nanotubes (CNTs), [17][18][19][20] and gold 21 have been reported. The properties of LC have been enhanced by doping with NPs.…”

Effects of Nanoscaled Tin-Doped Indium Oxide on Liquid Crystals against Electrostatic Discharge

“…To obtain a higher display quality, the effects of fine particles added in LCs on the characteristics of the LCs have been investigated by several groups [1][2][3][4][5]. The chosen materials range from conducting materials [1,2] to insulating carbon nanotubes (CNTs) [3,4] and ferroelectric particles [5].…”

“…So far the subjects have included various kinds of materials such as metallic Ag-or Pd-nanoparticles [1,2], CNTs [3,4,[11][12][13], diamond particles [14], semiconductive nanotubes [15], cage-like polymeric molecules such as polyhedral oligomeric silsesquioxanes (POSS) [16,17], and ferroelectric particles [5,18]. By using these nanoparticle candidates, newly found texture, switching behavior, or enhanced electro-optical response for the modified LC can be achieved.…”