Abstract
Polarized optical absorption measurements were employed to study the orientational ordering process of 4'-n-pentyl-4-cyanobiphenyl (5CB) molecules deposited by the evaporation method. 5CB molecules were evaporated onto a silica substrate with and without ultra-thin polyimide films in a laboratory ambient atmosphere. The optical absorption of the films was measured during the deposition using linearly polarized UV light. The orientational order parameter S2 was determined, even for regions of less than one monolayer thickness. The results clearly show that the orientational order is dependent on the substrate surface.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.