Single-molecule measurement of the strength of a siloxane bond.
作者： Peter Schwaderer , Enno Funk , Frank Achenbach , Johann Weis , Christoph Bräuchle
DOI: 10.1021/LA702352X
关键词:
摘要: Increasing the mechanical stability of artificial polymer materials is an important task in science, and for this a profound knowledge critical mechanoelastic properties its constituents vital. Here, we use AFM-based single-molecule force spectroscopy measurements to characterize rupture single silicon-oxygen bond backbone polydimethylsiloxane as well force-extension behavior polymer. PDMS not only used large variety products but also model system highly flexible polymers. In our experiments, probe entire relevant range from low forces dominated by entropy up covalent Si-O bonds at high forces. The resulting rupture-force histograms are investigated with microscopic models under load compared density functional theory calculations free-energy landscape backbone.
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