CB Layers at Different Temperature 1 “Formation of Liquid Crystalline Phases from a Langmuir Monolayer” By K.A. Suresh and A. Bhattacharyya Langmuir 1997, 13,

CB Layers at Different Temperature 2 Phase Transition of 8CB in Bulk (3D) Crystal 20.5 o C Smectic A 33.3 o C Nematic 41.5 o C Isotropic Temperature

CB Layers at Different Temperature 3 Typical Isotherm at 25 o C (T < 28 o C)

CB Layers at Different Temperature 4 Isotherm at 30 o C (28 o C < T < 36 o C)

CB Layers at Different Temperature 5 Isotherm at 40 o C (36 o C < T < 36 o C)

CB Layers at Different Temperature 6 Images under Fluorescence Microscope 25 o C 30 o C Area/Molecule = 10 A 2 1~40 um

CB Layers at Different Temperature 7 Images under Reflection Microscope 25 o C30 o C~28 o C Area/Molecule = 10 A 2 Thickness = Nλ/(2n)

CB Layers at Different Temperature 8 Images under Polarized Microscope 30 o C, 10 A 2 A/M  Nematic Phase Schlieren Textures Boojum-like Textures

CB Layers at Different Temperature 9