Development of a precisely temperature-programmable Langmuir trough for measuring properties of insoluble monolayers at the water surface as functions of temperature

• Published in: Japanese Journal of Applied Physics Vol. 34; no. 7B; pp. L911 - L914
• Main Authors: KATO, T, TATEHANA, A, SUZUKI, N, IIMURA, K.-I, ARAKI, T, IRIYAMA, K
• Format: Journal Article
• Language: English
• Published: Tokyo Japanese journal of applied physics 1995
• Subjects: Chemistry; Exact sciences and technology; Gas-liquid interface and liquid-liquid interface; General and physical chemistry; Surface physical chemistry; Gas liquid interface; Monolayer; Molecular structure; Temperature effect; Isochore; Lipids; Langmuir method; Air water interface; Experimental study; Convection; Programmed temperature; Isobar; Brewster's angle; Computer aid; Peltier effect
• ISSN: 0021-4922; 1347-4065
• DOI: 10.1143/jjap.34.L911

A new type of Langmuir trough was constructed in which temperature of the water surface is controlled precisely according to a program using a large number of Peltier elements and a microcomputer. We can suppress convection of the water in the trough during linear heating or linear cooling by planning the trough as thin as 2 mm. This trough is very suitable for measuring
A-T
isobars and π-
T
isochores of insoluble monolayers which are rarely measured precisely. The newly developed trough can permit observation of Brewster angle microscopic (BAM) images of insoluble monolayers clearly during measurements of
A-T
isobars by suppressing convection completely.