Chain Polymerization of Diacetylene Compound Multilayer Films on the Topmost Surface Initiated by a Scanning Tunneling Microscope Tip

Chain polymerizations of diacetylene compound multilayer films on graphite substrates were examined with a scanning tunneling microscope (STM) at the liquid/solid interface of the phenyloctane solution. The first layer grew very quickly into many small domains. This was followed by the slow formatio...

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Bibliographic Details
Published in:Langmuir 2007-05, Vol.23 (10), p.5247-5250
Main Authors: Takajo, Daisuke, Okawa, Yuji, Hasegawa, Tsuyoshi, Aono, Masakazu
Format: Article
Language:English
Subjects:
Chemistry
Exact sciences and technology
General and physical chemistry
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Summary:Chain polymerizations of diacetylene compound multilayer films on graphite substrates were examined with a scanning tunneling microscope (STM) at the liquid/solid interface of the phenyloctane solution. The first layer grew very quickly into many small domains. This was followed by the slow formation of the piled up layers into much larger domains. Chain polymerization on the topmost surface layer could be initiated by applying a pulsed voltage between the STM tip and the substrate, usually producing a long polymer of submicrometer length. In contrast, polymerizations on the underlying layer were never observed. This can be explained by a conformation model in which the polymer backbone is lifted up.
ISSN:0743-7463
1520-5827
DOI:10.1021/la700241z