New method of studying the low surface pressures of monolayer at air/water interface

Abstract

Articles you may be interested inSurface viscoelastic properties of spread ferroelectric liquid crystal monolayer on air-water interface AIP Conf. Proc. 1536, 1377 (2013); 10.1063/1.4811809Study of relaxation process of dipalmitoyl phosphatidylcholine monolayers at air-water interface: Effect of electrostatic energy A canal surface viscometer for the inplane steady shear viscosity of monolayers at the air/water interface Rev.The determination of the properties of gaseous films at air/water interface requires very special techniques as far as the measurements of the surface pressure are concerned. We ?ave designed an apparatus based upon the characteristics of Langmuir trough. The measunng system consists of a lamp, three optics fibers and two high-gain phototransistors. The surface pressure that have been measured (accurately with great ease) range from 0.0010--0.1500+0.00005 mN m-I or +0.1%. One successful application of the apparatus had been the determination of the molecular weight of proteins such as the bovine serum albumin, egg albumin, bovine rhodopsin, and cytochrome c.