Mesoscopic structures are important for photonics applications. Here we describe the preparation of (sub)micrometer
droplet or line patterns of organic semiconductors by a simple casting process. Dewetting during the solvent evaporation
leads to the formation of regular structures that are caused by the so-called dissipative structures that develop during nonequilibrium
conditions. Controlling the casting conditions (concentration, speed, etc) we were able to tailor the resulting
patterns. Examples for the patterns are luminescent or conducting aggregates that can be used as organic transistors.
Coating the self-organized structures with metals is an easy process to produce patterend metal surfaces, which can be
sued in plasmonics.
A dewetting process of an evaporating solution is used to form micrometer-sized amorphous droplets, or "domes", of organic compounds, both polymeric and low-molar-mass, on various substrates such as silicon, mica, glass, and indiumtin-oxide. The produced patterns are characterized by a regular 2-dimensional array of similar-sized domes. Here we report on the reversible shape change of polymeric domes (between lens and sphere) and the irreversible shape
change of domes made of low-molar-mass compounds, e.g. due to crystallization. Control of crystallization leads to the formation of single crystallites of a non-linear-optically active p-nitro phenol salt.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.