Video Gallery

Drying droplets of aqueous PEO solution, with varying molecular weight (3.35, 100, 300kg/mol from top to bottom) and atmospheric pressure (0.2, 0.5 and 1atm from left to right). The precipitation-driven pseudo-dewetting stage is more prominent at intermediate molecular weight and low atmospheric pressure, and results in more dramatic fully dried pillar structures

source: Nils Bornemann

The video shows the drying of a printing result of a lab-scale gravure

printing process. The substrate is ITO-coated glass, the printing fluid is

the organic semiconductor Spiro-MeOTAD solved in toluene for organic light

emitting diode (OLED) applications. The different fields have got dry layer

thicknesses of 5 nm (right) to 100 nm (left). The aim was to print

homogenous fields, the different pattern formations (instabilities) are

investigated in the scientific contribution to this colloquium.