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5 October 2023 Quantitative characterisation of conjugated polymers: mass distribution and polymerisation defects determined by molecular scale imaging
Stefania Moro, Giovanni Costantini, Michael Sommer
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Proceedings Volume PC12650, Physical Chemistry of Semiconductor Materials and Interfaces XXII; PC126500O (2023) https://doi.org/10.1117/12.2677311
Event: SPIE Nanoscience + Engineering, 2023, San Diego, California, United States
Abstract
The recently developed combination of vacuum electrospray deposition (ESD) and scanning tunnelling microscopy (STM) is here compared to commonly-used analytical techniques GPC and NMR. We study three DPP-based polymers, of which only two produce clearly-resolved NMR spectra. Our subnanometre-resolved images provide, in one single experiment, detailed information about complete mass distributions and exact polymer sequences, including the identification of polymerisation defects. We, therefore, show that ESD-STM represents a new powerful analytical tool, successfully benchmarked against NMR and GPC when these methods are viable, and that can be used to characterise with equal accuracy polymers that are inaccessible by traditional techniques.
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Stefania Moro, Giovanni Costantini, and Michael Sommer "Quantitative characterisation of conjugated polymers: mass distribution and polymerisation defects determined by molecular scale imaging", Proc. SPIE PC12650, Physical Chemistry of Semiconductor Materials and Interfaces XXII, PC126500O (5 October 2023); https://doi.org/10.1117/12.2677311
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KEYWORDS
Polymers
Polymerization
Scanning tunneling microscopy
Testing and analysis
Macromolecules
Molecular aggregates
Self-assembled monolayers
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