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Models of Gemini Surfactants HAIM DIAMANT and DAVID ANDELMAN Tel Aviv University,
 

Summary: 3
Models of Gemini Surfactants
HAIM DIAMANT and DAVID ANDELMAN Tel Aviv University,
Tel Aviv, Israel
I. INTRODUCTION
Gemini surfactants are composed of two monomeric surfactant molecules
linked by a spacer chain. They constitute a new class of amphiphilic mole-
cules having its own distinct behavior. Since their first systematic studies
over a decade ago, gemini surfactants have been the subject of intensive
research (see Ref. 1 and references therein). Research has been motivated
by the advantages of gemini surfactants over regular ones with respect to
various applications [e.g., their increased surface activity, lower critical mi-
celle concentration (cmc), and useful viscoelastic properties such as effective
thickening].
In addition to their importance for applications, the behavior of gemini
surfactants is qualitatively different in several respects from that of regular
surfactants, posing challenges to current theories of surfactant self-assem-
bly. The main puzzles raised by gemini surfactants can be summarized as
follows [1]:
Surface behavior. The area per molecule in a saturated monolayer at

  

Source: Andelman, David - School of Physics and Astronomy, Tel Aviv University

 

Collections: Materials Science; Physics