title: Chronicles of foam films.
abstract: The history of the scientific research on foam films, traditionally known as soap films, dates back to as early as the late 17th century when Boyle and Hooke paid special attention to the colours of soap bubbles. Their inspiration was transferred to Newton, who began systematic study of the science of foam films. Over the next centuries, a number of scientists dealt with the open questions of the drainage, stability and thickness of foam films. The significant contributions of Plateau and Gibbs in the middle/late 19th century are particularly recognized. After the "colours" method of Newton, Reinold and Rücker as well as Johhonnot developed optical methods for measuring the thickness of the thinner "non-colour" films (first order black) that are still in use today. At the beginning of the 20th century, various aspects of the foam film science were elucidated by the works of Dewar and Perrin and later by Mysels. Undoubtedly, the introduction of the disjoining pressure by Derjaguin and the manifestation of the DLVO theory in describing the film stability are considered as milestones in the theoretical development of foam films. The study of foam films gained momentum with the introduction of the microscopic foam film methodology by Scheludko and Exerowa, which is widely used today. This historical perspective serves as a guide through the chronological development of knowledge on foam films achieved over several centuries.
authors.affiliation: Max-Planck Institute of Colloids and Interfaces, 14424 Potsdam, Golm, Germany; Institute of Physical Chemistry, Bulgarian Academy of Science, 1113 Sofia, Bulgaria. Electronic address: gochev@mpikg.mpg.de.
authors.forename: G
authors.initials: G
authors.lastname: Gochev
authors.affiliation: Department of Physical Chemistry, Sofia University, 1164 Sofia, Bulgaria.
authors.forename: D
authors.initials: D
authors.lastname: Platikanov
authors.affiliation: Max-Planck Institute of Colloids and Interfaces, 14424 Potsdam, Golm, Germany.
authors.forename: R
authors.initials: R
authors.lastname: Miller
keywords: Black foam films; Film stability; Film thickness; Foam films; Soap films; Stratified foam films