ISSN:
1435-1536
Keywords:
Contact angle
;
streaming potential
;
ellipsometry
;
photoelectron spectroscopy
;
Langmuir-Blodgett multilayers
;
poly(diacetylene)s
;
poly(butadiene)s
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
,
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Abstract The surface properties of Langmuir-Blodgett mono- and multilayers of a variety of amphiphilic poly(diacetylene)s and poly(butadiene)s were investigated by contact angle, streaming potentialζ, ellipsometry, and X-ray photoelectron spectroscopic (XPS) measurements. Captive air and octane angles varied between approximately 60° and 105° for hydrophobicx-layers and 31° to 46° for hydrophilic surfaces depending on the particular head group, whereas advancing angles determined via the vertical plate method are considerably higher. Negative streaming potentials were obtained for all surfaces. Positively charged monolayers yielded less negativeζ- potential values (−28 mV) than negatively charged (−52 mV) or hydrophobic (−50 mV) layers. Ellipsometry measurements yielded an average layer thickness of 27±6 Å for 3 to 11 layers. X-ray photoelectron spectroscopy results qualitatively confirmed the expected composition. All of the samples, which were handled and stored in air after deposition and polymerization, were surface oxidized.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01447963
Permalink
