Nematic liquid crystal reorientation around multi-walled carbon nanotubes mapped via Raman microscopy
Authors: Cacace T., García-García A., Zito G., Tkachenko V., Rusciano G., Geday M.A., Otón J.M., Marino A., Sasso, A.
Autors Affiliation: Inst Appl Sci & Intelligent Syst CNRISASI, Via Campi Flegrei 34,I-80078 Pozzuoli, NA, Italy; Univ Naples Federico II, Phys Dept E Pancini, Via Cinthia Monte S Angelo, I-80126 Naples, Italy; Univ Politecn Madrid, ETSI Telecomunicac, CEMDATIC, Ave Complutense 30, E-28040 Madrid, Spain; CNR, Natl Inst Opt, Via Campi Flegrei 34, I-80078 Pozzuoli, NA, Italy
Abstract: We have studied the formation of topological defects in liquid crystal (LC) matrices induced by multiwalled carbon nanotubes (MWCNTs) and external electric fields. The defects are ascribable to a distortion of the LC molecular director in proximity of the MWCNT surface. The system is analyzed macroscopically using spectroscopic variable angle ellipsometry. Concurrently, confocal micro-Raman spectroscopy is used to study the system state at the microscale. This allows to acquire a three-dimensional, spatially-resolved map of the topological defect, determining scale length variations and orientation topography of the LC molecules around the MWCNT
Journal/Review: OPTICS EXPRESS
Volume: 24 (14) Pages from: 15954 to: 15964
KeyWords: CNT; LC; DOI: 10.1364/OE.24.015954Citations: 5data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2023-02-05References taken from IsiWeb of Knowledge: (subscribers only)Connecting to view paper tab on IsiWeb: Click hereConnecting to view citations from IsiWeb: Click here