Scientific Results

Nematic liquid crystal reorientation around multi-walled carbon nanotubes mapped via Raman microscopy

Year: 2016

Authors: Rusciano G., Cacace, T., García-García, A., Zito, G, Tkachenko, V., Rusciano, G. , Geday, M.A, Otón, J.M., Marino, A., Sasso, A.

Autors Affiliation: Physics Department E. Pancini, University of Naples Federico II, Via Cinthia Monte S. Angelo, Naples, 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      Pages from: 15954  to: 1596

KeyWords: CNT; LC;
DOI: 10.1364/OE.24.015954

Citations: 3
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