title: Triple-line decoration and line tension in simple three-dimensional foam clusters.
abstract: We show that if the triple line around a three-dimensional double bubble or lens bubble is decorated with another bubble or with a Plateau border, then the film prolongations into the decoration no longer meet at 2pi/3. These deviations can be accounted for in terms of a line tension that equals half the excess surface energy associated with the decoration.
authors.affiliation: Departamento de Engenharia de Materiais and Instituto de Ciência e Engenharia de Materiais e Superfícies, Instituto Superior Técnico Avenida Rovisco Pais, P-1049-001 Lisbon, Portugal.
authors.forename: M A
authors.initials: MA
authors.lastname: Fortes
authors.forename: P I C
authors.initials: PI
authors.lastname: Teixeira