Autor segons l'article: Schreiber, Roy E.; Houben, Lothar; Wolf, Sharon G.; Leitus, Gregory; Lang, Zhong-Ling; Carbo, Jorge J.; Poblet, Josep M.; Neumann, Ronny;
Departament: Química Física i Inorgànica
Autor/s de la URV: Carbó Martin, Jorge Juan / Poblet Rius, Josep Maria
Resum: How molecules in solution form crystal nuclei, which then grow into large crystals, is a poorly understood phenomenon. The classical mechanism of homogeneous crystal nucleation proceeds via the spontaneous random aggregation of species from liquid or solution. However, a non-classical mechanism suggests the formation of an amorphous dense phase that reorders to form stable crystal nuclei. So far it has remained an experimental challenge to observe the formation of crystal nuclei from five to thirty molecules. Here, using polyoxometallates, we show that the formation of small crystal nuclei is observable by cryogenic transmission electron microscopy. We observe both classical and non-classical nucleation processes, depending on the identity of the cation present. The experiments verify theoretical studies that suggest non-classical nucleation is the lower of the two energy pathways. The arrangement in just a seven-molecule proto-crystal matches the order found by X-ray diffraction of a single bulk crystal, which demonstrates that the same structure was formed in each case.
Àrees temàtiques: Química Materiais Interdisciplinar General medicine General chemistry General chemical engineering Chemistry, multidisciplinary Chemistry (miscellaneous) Chemistry (all) Chemical engineering (miscellaneous) Chemical engineering (all)
Accès a la llicència d'ús: https://creativecommons.org/licenses/by/3.0/es/
Adreça de correu electrònic de l'autor: josepmaria.poblet@urv.cat j.carbo@urv.cat
Identificador de l'autor: 0000-0002-4533-0623 0000-0002-3945-6721
Data d'alta del registre: 2024-09-07
Versió de l'article dipositat: info:eu-repo/semantics/acceptedVersion
Enllaç font original: https://www.nature.com/articles/nchem.2675
URL Document de llicència: https://repositori.urv.cat/ca/proteccio-de-dades/
Referència a l'article segons font original: Nature Chemistry. 9 (4): 369-373
Referència de l'ítem segons les normes APA: Schreiber, Roy E.; Houben, Lothar; Wolf, Sharon G.; Leitus, Gregory; Lang, Zhong-Ling; Carbo, Jorge J.; Poblet, Josep M.; Neumann, Ronny; (2017). Real-time molecular scale observation of crystal formation. Nature Chemistry, 9(4), 369-373. DOI: 10.1038/nchem.2675
DOI de l'article: 10.1038/NCHEM.2675
Entitat: Universitat Rovira i Virgili
Any de publicació de la revista: 2017
Tipus de publicació: Journal Publications