Projects per year
Abstract
© 2016 Wiley-VCH Verlag GmbH & Co. KGaA.Providing a quantitative understanding of the thermodynamics involved in molecular adsorption and self-assembly at a nanostructured carbon material is of fundamental importance and finds outstanding applications in the graphene era. Here, we study the effect of edge perchlorination of coronene, which is a prototypical polyaromatic hydrocarbon, on the binding affinity for the basal planes of graphite. First, by comparing the desorption barrier of hydrogenated versus perchlorinated coronene measured by temperature-programmed desorption, we quantify the enhancement of the strength of physisorption at the single-molecule level though chlorine substitution. Then, by a thermodynamic analysis of the corresponding monolayers based on force-field calculations and statistical mechanics, we show that perchlorination decreases the free energy of self-assembly, not only enthalpically (by enhancing the strength of surface binding), but also entropically (by decreasing the surface concentration). The functional advantage of a chemically modulated 2D self-assembly is demonstrated in the context of the molecule-assisted liquid-phase exfoliation of graphite into graphene.
Original language | English |
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Pages (from-to) | 352-357 |
Number of pages | 6 |
Journal | ChemPhysChem |
Volume | 17 |
Issue number | 3 |
DOIs | |
Publication status | Published - 3 Feb 2016 |
Keywords
- graphene
- interfaces
- polycyclic aromatic hydrocarbons
- self-assembly
- statistical thermodynamics
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Dive into the research topics of 'Perchlorination of Coronene Enhances its Propensity for Self-Assembly on Graphene'. Together they form a unique fingerprint.Projects
- 1 Finished
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Graphene-based membranes
Budd, P., Carbone, P., Casiraghi, C., Grieve, B., Haigh, S., Holmes, S., Jivkov, A., Kinloch, I., Raveendran Nair, R., Schroeder, S., Siperstein, F. & Vijayaraghavan, A.
1/07/13 → 30/06/18
Project: Research