Autor según el artículo: Schreiber, Roy E.; Houben, Lothar; Wolf, Sharon G.; Leitus, Gregory; Lang, Zhong-Ling; Carbo, Jorge J.; Poblet, Josep M.; Neumann, Ronny;
Departamento: Química Física i Inorgànica
Autor/es de la URV: Carbó Martin, Jorge Juan / Poblet Rius, Josep Maria
Palabras clave: Climate action
Resumen: 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.
Áreas temáticas: Química Materiais Interdisciplinar General medicine General chemistry General chemical engineering Chemistry, multidisciplinary Chemistry (miscellaneous) Chemistry (all) Chemical engineering (miscellaneous) Chemical engineering (all)
Acceso a la licencia de uso: https://creativecommons.org/licenses/by/3.0/es/
Direcció de correo del autor: josepmaria.poblet@urv.cat j.carbo@urv.cat
Identificador del autor: 0000-0002-4533-0623 0000-0002-3945-6721
Fecha de alta del registro: 2024-11-16
Versión del articulo depositado: info:eu-repo/semantics/acceptedVersion
Enlace a la fuente original: https://www.nature.com/articles/nchem.2675
URL Documento de licencia: https://repositori.urv.cat/ca/proteccio-de-dades/
Referencia al articulo segun fuente origial: Nature Chemistry. 9 (4): 369-373
Referencia 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 del artículo: 10.1038/nchem.2675
Entidad: Universitat Rovira i Virgili
Año de publicación de la revista: 2017
Tipo de publicación: Journal Publications