Observation of three growth mechanisms in self-assembled monolayers

Carlo Carraro, Oranna W. Yauw, Myung Mo Sung, Roya Maboudian

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Time-resolved atomic force microscopy and contact angle measurements reveal that the self-assembly of octadecyltrichlorosilane-based monolayers on the oxidized Si(100) surface can be initiated by three distinct mechanisms: island growth at low temperatures (T < 16°C), homogeneous growth at high temperatures (T ≥ 40°C), and a mixed regime at intermediate temperatures. These results support the notion of a transient Langmuir film at the substrate-solution interface: the observed growth patterns are consistent with nucleation of liquid-condensed domains coexisting with a two-dimensional gas at low temperature, or with a liquid-expanded phase at intermediate temperatures.

Original languageEnglish
JournalJournal of Physical Chemistry B
Issue number23
StatePublished - 1998 Jun 4

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