Phase states of water near the surface of a polymer membrane. Phase microscopy and luminescence spectroscopy experiments

Journal Article · Sat Nov 15 00:00:00 EST 2014 · Journal of Experimental and Theoretical Physics

DOI:https://doi.org/10.1134/S106377611411003X· OSTI ID:22309097

Gorelik, V. S. ^[1]

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1. Russian Academy of Sciences, Lebedev Physical Institute (Russian Federation)

Phase microscopy is used to show that the refractive index in the near-surface layer of water at the surface of a polymer Nafion membrane increases by a factor of 1.1 as compared to bulk water. Moreover, this layer exhibits birefringence. Experiments on UV irradiation of dry (anhydrous) and water-soaked Nafion are performed in grazing-incidence geometry to study their stimulated luminescence spectra. These spectra are found to be identical in both cases. For dry Nafion, luminescence can only be excited if probing radiation illuminates the polymer surface. The luminescence of water-soaked Nafion can also be excited if the distance between the optical axis and the surface is several hundred micrometers.

• OSTI ID: 22309097
• Journal Information: Journal of Experimental and Theoretical Physics, Vol. 119, Issue 5; Other Information: Copyright (c) 2014 Pleiades Publishing, Inc.; Country of input: International Atomic Energy Agency (IAEA); ISSN 1063-7761
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BIREFRINGENCE
EMISSION SPECTROSCOPY
LUMINESCENCE
MEMBRANES
OPTICAL MICROSCOPY
POLYMERS
REFRACTIVE INDEX
SURFACES
ULTRAVIOLET RADIATION
WATER