M. Su et al., SUBSTRATE-DEPENDENT DISPERSION BEHAVIOR OF POLYMER-PROTECTED PT COLLOID STUDIED BY SPM, Applied surface science, 133(1-2), 1998, pp. 23-26
Citations number
14
Categorie Soggetti
Physics, Applied","Physics, Condensed Matter","Chemistry Physical","Materials Science, Coatings & Films
The dispersion behavior of PVP-protected platinum colloids on mica and
gold is studied by scanning probe microscopy (STM and AFM). Both the
distribution pattern and morphology of colloids are different on the t
wo substrates. It is found that the dispersion results are determined
not only by lateral capillary force but also by the evaporation rate o
f solvent. For dispersion on mica surfaces, the colloids form regular
patterns at the edges of polymer patches that are stripped off the col
loids. On gold surfaces, the protected colloids disperse randomly and
preserve their core-shell structures. The reason is attributed to the
different evaporation rate of solvent on two substrates, which in turn
induces the difference in the effect of the lateral capillary force.
(C) 1998 Elsevier Science B.V. All rights reserved.