NDLI: TEMPERATURE DEPENDENCE OF THE SURFACE FREE ENERGY

Please wait, while we are loading the content...

TEMPERATURE DEPENDENCE OF THE SURFACE FREE ENERGY

Content Provider	Scilit
Author	Barbero, Giovanni Evangelista, Luiz Roberto
Copyright Year	2005
Description	In this chapter, we analyze the temperature dependence of the surface energy of a nematic liquid crystal sample in three diﬀerent perspectives. We start by discussing a model for the thermal renormalization of the anchoring energy, by expanding the surface energy in series of spherical harmonic functions. The coeﬃcients of the expansion are the experimentally detectable anchoring coeﬃcients. It is shown that all the anchoring coeﬃcients of the same order depend on the temperature in the same manner. As a consequence, the alignment transitions driven by the surface (the so-called temperature surface transitions) are due to a surface anchoring energy which contains contributions of diﬀerent orders. A local self-consistent model, that takes into account the presence of a surface ﬁeld as well as an incomplete bulk nematic interaction, is presented in connection with the determination of the temperature dependence of the surface tension near the nematic-isotropic phase transition. It is shown that, according to the strength of the surface ﬁeld, the surface tension presents a minimum just before the transition, followed by a strong variation at the transition. Finally, a microscopic approach to the surface gliding eﬀect in lyotropic liquid crystals is discussed in terms of a thermally activated process. The problem is formulated in terms of a master equation describing the jumps between adjacent angular positions. Book Name: Adsorption Phenomena and Anchoring Energy in Nematic Liquid Crystals
Related Links	https://content.taylorfrancis.com/books/download?dac=C2006-0-03667-8&isbn=9780429124181&doi=10.1201/9781420037456-8&format=pdf
DOI	10.1201/9781420037456-8
Language	English
Publisher	Informa UK Limited
Publisher Date	2005-07-28
Access Restriction	Open
Subject Keyword	Book Name: Adsorption Phenomena and Anchoring Energy in Nematic Liquid Crystals Physical Chemistry Thermal Crystals Tension Temperature Dependence of the Surface Coeﬃcients
Content Type	Text
Resource Type	Chapter

Central Library (ISO-9001:2015 Certified)
Indian Institute of Technology Kharagpur
Kharagpur, West Bengal, India | PIN - 721302

See location in the Map
03222 282435
Mail: support@ndl.gov.in

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in