This chapter contains basic data about the microfluidic description of
pendant droplets. Results are shown regarding the surface/interfacial tension
measurements performed on water based solutions following the interaction with laser
radiation. A synthesis is introduced of the main methods used to produce simple or
complex droplets in different media. A method to evidence surface active products
obtained after exposure of medicine solutions to laser radiation is presented. It consists
in measuring in real time the dynamic interfacial tension at the interface between air
and irradiated solution, when solution is in bulk form. The variation of dynamic
interfacial tension is an indicator of the presence of laser produced amphiphilic
molecules in solution. These results belong to series of reports dedicated to new
methods used to fight multiple drug resistance developed by bacteria by decreasing the
concentration of active compounds with bactericide effects. In line with microfluidic
approach of droplets with μl volumes, surface tension measurements on DMSO-water
mixtures containing a dye are presented.
Keywords: Aerosols, Bubbles, Capillarity, Colloidal systems, Contact angle,
Dynamic surface tension, Hanging droplet, Hydrophilicity, Hydrophobicity,
Immiscible fluids, Pendant droplet, Sessile droplet, Suspended droplet,
Vancomycin.
