Hysteresis of Isotherms of Mixed Monolayers of N-Octadecyl-N′-phenylthiourea and Stearic Acid at AirWater Interface

المؤلفون المشاركون

Sudheesh, Siji
Ahmad, Jamil
Singh, Girija S.

المصدر

ISRN Physical Chemistry

العدد

المجلد 2012، العدد 2012 (31 ديسمبر/كانون الأول 2012)، ص ص. 1-6، 6ص.

الناشر

Hindawi Publishing Corporation

تاريخ النشر

2012-12-19

دولة النشر

مصر

عدد الصفحات

6

التخصصات الرئيسية

الفيزياء
الكيمياء

الملخص EN

Surface pressure area isotherms of Langmuir monolayers formed by spreading mixed solutions of varying concentrations of N-octadecyl-N′-phenylthiourea (OPT) and octadecanoic acid or stearic acid (SA) over air-water interface are described.

Examination of the hysteresis behavior and an analysis of the limiting area per molecule of the isotherms show that when the spread solution has an excess of OPT, the limiting surface area is consistent with a monolayer composed of equimolar amounts of the two components.

This indicates that any excess thiourea, which on its own does not form a stable monolayer, is squeezed out and is not part of the monolayer.

On the other hand, when the spreading mixture has an excess of SA over OPT, the isotherm indicates that the entire originally spread material is incorporated into the surface film.

In this case, the values of area/molecule indicate that the monolayer is composed of SA : OPT complex with a ratio of 1 : 1 together with the excess SA remaining in the monolayer.

نمط استشهاد جمعية علماء النفس الأمريكية (APA)

Sudheesh, Siji& Ahmad, Jamil& Singh, Girija S.. 2012. Hysteresis of Isotherms of Mixed Monolayers of N-Octadecyl-N′-phenylthiourea and Stearic Acid at AirWater Interface. ISRN Physical Chemistry،Vol. 2012, no. 2012, pp.1-6.
https://search.emarefa.net/detail/BIM-501924

نمط استشهاد الجمعية الأمريكية للغات الحديثة (MLA)

Sudheesh, Siji…[et al.]. Hysteresis of Isotherms of Mixed Monolayers of N-Octadecyl-N′-phenylthiourea and Stearic Acid at AirWater Interface. ISRN Physical Chemistry No. 2012 (2012), pp.1-6.
https://search.emarefa.net/detail/BIM-501924

نمط استشهاد الجمعية الطبية الأمريكية (AMA)

Sudheesh, Siji& Ahmad, Jamil& Singh, Girija S.. Hysteresis of Isotherms of Mixed Monolayers of N-Octadecyl-N′-phenylthiourea and Stearic Acid at AirWater Interface. ISRN Physical Chemistry. 2012. Vol. 2012, no. 2012, pp.1-6.
https://search.emarefa.net/detail/BIM-501924

نوع البيانات

مقالات

لغة النص

الإنجليزية

الملاحظات

Includes bibliographical references

رقم السجل

BIM-501924