Exploiting the Surface Properties of Graphene for Polymorph Selectivity
authors Boyes, M; Alieva, A; Tong, JC; Nagyte, V; Melle-Franco, M; Vetter, T; Casiraghi, C
nationality International
journal ACS NANO
author keywords graphene; surface chemistry; glycine; crystallization; polymorphism; computational modeling
keywords THERMODYNAMIC ASPECTS; CRYSTAL NUCLEATION; GLYCINE CRYSTALS; 1ST PRINCIPLES; EXFOLIATION; FUNCTIONALIZATION; SOLUBILITY; GRAPHITE; GROWTH
abstract Producing crystals of the desired form (polymorph) is currently a challenge as nucleation is yet to be fully understood. Templated crystallization is an efficient approach to achieve polymorph selectivity; however, it is still unclear how to design the template to achieve selective crystallization of specific polymorphs. More insights into the nanoscale interactions happening during nucleation are needed. In this work, we investigate crystallization of glycine using graphene, with different surface chemistry, as a template. We show that graphene induces the preferential crystallization of the metastable alpha-polymorph compared to the unstable beta-form at the contact region of an evaporating droplet. Computer modeling indicates the presence of a small amount of oxidized moieties on graphene to be responsible for the increased stabilization of the alpha-form. In conclusion, our work shows that graphene could become an attractive material for polymorph selectivity and screening by exploiting its tunable surface chemistry.
publisher AMER CHEMICAL SOC
issn 1936-0851
isbn 1936-086X
year published 2020
volume 14
issue 8
beginning page 10394
ending page 10401
digital object identifier (doi) 10.1021/acsnano.0c04183
web of science category Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary
subject category Chemistry; Science & Technology - Other Topics; Materials Science
unique article identifier WOS:000566341000099
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journal impact factor 14.588
5 year journal impact factor 15.211
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