ZB 10 - Soft Condensed Matter (R. Holyst)

Langmuir and Langmuir-Blodgett Films of Unsymmetrical and Fully Condensed Polyhedral Oligomeric Silsesquioxanes (POSS)

Author(s): Paczesny, Jan and Binkiewicz, Ilona and Janczuk, Marta and Wybranska, Katarzyna and Richter, Lukasz and Holyst, Robert
Title: Langmuir and Langmuir-Blodgett Films of Unsymmetrical and Fully Condensed Polyhedral Oligomeric Silsesquioxanes (POSS)
Abstract: The search for novel building blocks for preparation of nanostructures unique properties is crucial for development of functional Polyhedral oligomeric silsesquioxanes (POSS) may be as organic-inorganic nanopartides of unusual characteristics, monodisperse size, high temperature resistance, and small constant. Here, we study four derivatives of fully condensed oligomeric octasilsesquioxanes. Seven corners of the POSS are substituted with isobutyl groups forming a hydrophobic tail, the eighth substituent acts as a hydrophilic head due to a chosen functional group. Such design assures amphiphilic of POSS molecules with well-defined hydrophilic head and tail. The combination of amphiphilicity, well-defined size composition, and rheological properties monolayers makes studied interesting model for self-assembly, thin films, and interfacial The Langmuir-Blodgett technique is used as a method that the best control over the parameters of thin films formation. functional hydrophilic group strongly influences the behavior of at the air/water interface. The mercapto derivative, which seems promising for preparation of complex nanostructures, appears to aggregates and multilayer films. Three other studied derivatives glycerol unit, maleamic acid, and amino group) behave as classical amphiphiles at the air/water interface.
Pages: 27007-27017
Journal: JOURNAL OF PHYSICAL CHEMISTRY C
Volume: 119
ID: ISI:000366006600024
Year: 2015
DOI: 10.1021/acs.jpcc.5b08090