Abstract
Gold nanoparticles mediated tuning of thermo-optical parameters in gold nanoparticles doped cholesteric liquid crystal nanocomposite. / G. Petriashvili, L. Devadze, Ts. Zurabishvili, N. Sepashvili, A. Chirakadze, T. Bukia, J. Markhulia, M. Areshidze, L. Sharashidze, Sh. Akhobadze, E. Arveladze, G. Sanikidze. – 2021–2022. – # 21/22. – pp. 111-124. – eng. Systems of nanoparticles (NPs) dispersed in liquid crystals (LCs) have attracted attention for the possible development of novel materials based on the controlled assembly of the NPs. There is investigated the formation of free-standing nanocomposites formed by the co-assembly of gold nanoparticles (GNPs) in the cholesteric liquid crystal (CLC) structures. It is found that increasing the concentration of GNPs in the CLC-mixture causes a significant modification of CLC structure and tuning of selective reflection band (SRB) over the optical spectrum. Furthermore, it is demonstrated that a light emission in the luminescent dye-doped CLC/GNPs-nanostructure can be increased dramatically when doped with a certain quantity of GNPs. The pumping laser beam onto the CLC/GNPs-nanostructure causes a temperature increase of this nanocomposite followed by SRB shifting of and spectral tuning of the stimulated laser emission lines from CLC/GNPs-nanocomposite. Fig. 11, Ref. 24.