Faculty Advisor

Garcia, Rafael

Abstract

Certain thermotropic, liquid crystal films exhibit a strange phenomenon in which two different thicknesses coexist side-by-side on a solid surface over a definite range of temperatures. A newly discovered thickness-coexistence region is presented for stable films of the liquid crystal 8CB adsorbed on silicon. A phase diagram is deduced from X-ray and optical measurements. The analysis of the percent areas, covered by thin and thick phases in the coexistence region, reveals that they satisfy a lever rule similar to other thermodynamic systems.

Publisher

Worcester Polytechnic Institute

Date Accepted

April 2008

Major

Physics

Project Type

Major Qualifying Project

Accessibility

Unrestricted

Advisor Department

Physics

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