Lasers in Foams and Emulsions Studies
Pp. 293-337 (45)
Viorel Nastasa, Mihai Boni, Alexandru Stoicu, Andra Dinache, Adriana Smarandache and Mihail Lucian Pascu
This chapter presents results regarding production of emulsions and foams
and their interaction with laser beams. Foams and emulsions are considered mainly
collection of bubbles, or drops of different kind with particular properties, respectively.
Here, emulsions of oily vitamin A and water in which various surfactants were
introduced are described outlining the conditions in which they have a longer time
stability. Laser induced fluorescence emitted by microdroplets that contain emulsions
of rhodamine 6G in water and oily vitamin A is shown and the spectral distribution of
the fluorescence radiation is described evidencing the enhancement of fluorescence
emitted by droplets with respect to bulk. Lasing conditions in droplets are discussed
and the role of reflections on foam drop inner structural components is outlined. Foams
based on water solutions of vancomycin, produced by droplets interaction with laser
beams are described in correlation with biomedical applications. Foams of polidocanol
in water produced by Tessari method are described and their use in varicose vein
treatments is introduced outlining the role of their exposure in tissues to infrared
Nd:YAG laser beams in connection with the more rapid positive treatment effects.
Polidocanol foam stability function of several surfactants such as tween 80, glycerin
and xanthan gum is presented and discussed.
Aetoxisclerol, Colloids, Emulsion, Foam, Hanging droplet, Laser,
Nanoparticle, Pendant droplet, Polidocanol, Rhodamine 6G, Sclerosing foam,
Sclerotherapy, Sessile droplet, Suspended droplet, Tessari technique,
Vancomycin, Varicose veins, Vitamin A.
Laser Department, National Institute for Laser, Plasma and Radiation Physics, Magurele, Ilfov, Romania.