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Attachment of Polybutadienes to Hydrogen-Terminated Silicon and Post-Derivatization of the Adsorbed Species

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journal contribution
posted on 02.02.2010, 00:00 by Todd D. Wickard, Emily Nelsen, Nitesh Madaan, Niels ten Brummelhuis, Christina Diehl, Helmut Schlaad, Robert C. Davis, Matthew R. Linford
We report the first attachment of polymers with pendant vinyl groups to hydrogen-terminated silicon(111) (Si(111)-H); 1,2-polybutadiene (Mw = 3200−3500 g/mol) was attached to Si(111)-H under mild conditions at room temperature with visible light. We also report the partial functionalization, in solution, of 1,2-polybutadiene with various thiols using thiol−ene chemistry and the subsequent attachments of these compounds to Si(111)-H. The partially functionalized or unfunctionalized polybutadienes allow further functionalization at the surface through their unreacted carbon−carbon double bonds. We present this as a useful strategy for silicon surface modification. Surfaces were characterized with contact angle goniometry, spectroscopic ellipsometry, X-ray photoelectron spectroscopy (XPS), time-of-flight secondary ion mass spectrometry (ToF-SIMS), and atomic force microscopy (AFM).