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Author Castillo, R. ♦ Ramos, S. ♦ Ruiz-Garcia, J.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword MATERIALS SCIENCE ♦ THIN FILMS ♦ MICROSCOPY ♦ COMPRESSION ♦ FULLERENES ♦ SOLUTIONS ♦ INTERFACES
Abstract The aim of this paper is to present a direct observation of Langmuir films made of C{sub 6O} and C{sub 7O} along the process of their compression at 298 K, using Brewster angle microscopy. We found coexisting a gas phase and a condensed phase at low area densities. Our results agree with the formation of multilayers even at low area densities (500-1000 A{sup 2}/molecule). We made compressions of the films at several speeds. Using dilute spreading solutions (nearly 1x10{sup -5} M) and slow compressions we obtained multilayers. With rapid compressions, we found that the condensed phase formed beautiful foamlike structures and circular domains of different sizes at very low area densities. The circular domains developed holes (gas bubbles). As the compression of the films proceeded, those domains did not coalesce easily. Instead. the films prefer to form multilayers. Using concentrated spreading solutions (>1x10{sup -4} M) and slow compressions, multilayers were formed just after the deposition of the sample. 37 refs., 9 figs.
ISSN 00223654
Educational Use Research
Learning Resource Type Article
Publisher Date 1996-09-12
Publisher Place United States
Journal Journal of Physical Chemistry
Volume Number 100
Issue Number 37


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