Transition from Spin Dewetting to continuous film in spin coating of Liquid Crystal 5CB.

ABSTRACT: Spin dewetting refers to spontaneous rupture of the dispensed solution layer during spin coating, resulting in isolated but periodic, regular sized domains of the solute and is pre-dominant when the solute concentration (C _n ) is very low. In this article we report how the morphology of liquid crystal (LC) 5CB thin films coated on flat and patterned PMMA substrate transform from spin dewetted droplets to continuous films with increase in C _n . We further show that within the spin dewetted regime, with gradual increase in the solute concentration, periodicity of the isotropic droplets (λ _D ) as well as their mean diameter (d _D ), gradually decreases, till the film becomes continuous at a critical concentration (C _n *). Interestingly, th

SUBMITTER: Dhara P 

PROVIDER: S-EPMC5940909 | biostudies-literature | 2018 May

REPOSITORIES: biostudies-literature