Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/2819

 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. URI: http://hdl.handle.net/2289/2819 ISSN: 0295-50751286-4854 (Online) Alternative Location: http://dx.doi.org/ 10.1209/epl/i1998-00206-0 Copyright: 1998 EDP Sciences Appears in Collections: Research Papers (SCM)

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