Regensburg 2016 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 25: Oxide and Insulator Surfaces: Structure and Growth
O 25.6: Poster
Montag, 7. März 2016, 18:15–20:30, Poster E
A first step of twin polymerization to study: The self-assembly of the twin monomer Spiro at the LSI influenced by sonication and deposition substrate temperature. — •Yen D.C Nguyen1, Ha N.T Nguyen1, Michael Hietshold1, Thomas Ebert2, and Stefan Spange2 — 1TU-Chemnitz, Institute of Physics, Solid Surfaces Analysis Group, D-09107 Chemnitz, Germany — 2Polymer Chemistry Group, Institute of Chemistry, TU-Chemnitz
The twin monomer 2,2*-spirobi [4H-1,3,2-benzo-dioxasiline] (SBS) consisting of building blocks bonded together covalently has been used to produce organic*inorganic nanostructured hybrid materials. The polymerization is initiated by ring opening of the 4H-1,3,2- benzodioxasilines or cleavage of the Si-O-C bonds. This way generates two structurally different homopolymers (silicon dioxide and a phenolic resin). Self-assembly of this twin monomer (SBS) at undecanol/HOPG interface investigated by STM at the liquid-solid interface (LSI) influenced by sonication and deposition substrate temperature. Firstly, by sonicating SBS/undecanol solution samples in different time periods the polymerization of spiro monomer at undecanol/HOPG has been observed without any catalyst. Secondly, the polymerization of spiro monomer can also be controlled by the substrate temperature during the deposition of the molecules out of the solution. By increasing the temperature of the pre-heated substrate, various periodic assemblies of spiro (dimer, trimer or pentamer resin) can be obtained.