Orientation of 4-n-octyl-4′-cyanobiphenyl molecules on graphene oxide surface via electron–phonon interaction and its applications in nonlinear electronics

Abstract

Molecular arrangement of 8CB on the GO surface and its I–V curve.

Photoluminescence modulation in the graphene oxide dispersed 4-n-octyl-4’-cyanobiphenyl molecular system

“…This postulate is recently reported by us [23]. For the intermediate dispersion concentration of 2D-GO nanoflakes, the orientation of 8CB molecules represents a merged state of the planar and homeotropic orientations.…”

“…The temperature for recording the POMs of 8CB/GO composites in a desired phase was chosen from their corresponding phase schemes. It is observed that the presence of 2D-GO flakes significantly changes the molecular orientation of the 8CB; as a result, the exemplary optical textures of the SmA and N phases have not been observed for the composites because of the GO flakes migrate closer to ITO substrate/LC interface due to viscous drift [23].…”

“…2D-GO nanoflakes were synthesized from commercially available graphite following the Hummers method as previously described in our previous articles [18,19,23]. We have utilized the same 2D-GO nanoflakes in this study which is already reported in our previous articles [19,23]. To prepare GO suspension in DMF, 0.65 mg of 2D-GO nanoflakes were dissolved in 160 microliter of DMF and sonicated for 2.5 hours.…”

“…The physical properties of GO depend on the degree of oxidation. The dispersion of graphene, GO and rGO has revealed some superior properties in the LCs [20,21,22,23,24]. The most of investigated regimes with the dispersion of graphene, GO and rGO include the study of electro-optical, electronic and thermal properties, but it has not been done so well for the photoluminescence.…”

“…In our previous article [23], we have investigated the graphene oxide (GO) dispersed 4-n-octyl-4'-cyanobiphenyl (8CB) hybrid system to disclose the longrange molecular interactions between GO and 8CB molecules. In this report, it has been seen that the orientation of 8CB molecules successively changes from planar to homeotropic depending on the dispersion concentration of GO.…”