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Title: Novel phase diagram of a mixed Langmuir monolayer of octylcyanobiphenyl and stearic acid
Authors: Bhattacharyya, Amitabha.
Suresh, K.A.
Issue Date: 1998
Publisher: EDP Sciences
Citation: Europhysics Letters, 1998, Vol.41, p641-646
Abstract: We have studied the phase diagram of a mixed monolayer system of 4$^\prime$-n-octyl-4-cyanobiphenyl (8CB) and stearic acid (SA) at the air-water interface by surface manometry and optical microscopic techniques. We found that in the mixture, a liquid condensed phase (also known as ${\rm L}_2$) was induced which does not occur in the monolayers of the individual components. The induction occurs over a large range of molar concentrations viz. 3% to 95% of SA in 8CB. More interestingly, we observed a phase separation of the liquid expanded (LE) phase (also known as ${\rm L}_1$) into an 8CB-rich LE phase and an SA-rich LE phase for molar concentrations in the range 55% to 95% of SA in 8CB. We also observed a co-existence of three stable phases.
Description: Restricted Access.
ISSN: 0295-5075
1286-4854 (Online)
Alternative Location: 10.1209/epl/i1998-00206-0
Copyright: 1998 EDP Sciences
Appears in Collections:Research Papers (SCM)

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