Journal
MOLECULAR CRYSTALS AND LIQUID CRYSTALS
Volume 697, Issue 1, Pages 1-10Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/15421406.2020.1731097
Keywords
CARS; 5CB; confined liquid crystals; Raman; silica-based molecular sieves
Funding
- National Academy of Sciences of Ukraine under the Ukrainian Governmental Program KPKVK [6541230]
- National Academy of Sciences of Ukraine under the Polish-Ukrainian Scientific Cooperation Program (Project Structural and optical properties of disordered molecular systems for optoelectronics)
- Ministry of Education and Science of Ukraine in the frame of Ukrainian-Lithuanian Scientific Cooperation Program [S-LU-18-6]
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First application of CARS spectroscopy for visualization of probe liquid crystal (LC) molecules nanoconfined to mesoporous silica host is reported. Mesoporous molecular sieves (Al-MCM-41, KIT-6, and SBA-15) loaded with nematic 5CB as probe molecules were studied using a home-built CARS microscope. The images were registered in a forward mode in 1260-1700 cm(-1)spectral range. It was found that Al-MCM-41 showed the maximum density of the adsorbed species and the best filling uniformity among the studied hosts. The observed differences are explained by different active sites distribution and LC interaction with the host pore surface.
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