In Situ Live Observation of Nucleation and Dissolution of Sodium Chlorate Nanoparticles by Transmission Electron Microscopy.
The formation of crystals from solution requires the initial self-assembly of units of matter into stable periodic structures reaching a critical size. The early stages of this process , called nucleation, are very difficult to visualize. Here we describe a novel method that allows real time observa...
| Publicado en: | Journal of the American Chemical Society Vol. 136; no. 5; pp. 1762 - 1766 |
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| Autores principales: | , , , |
| Formato: | Artículo |
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American Chemical Society
2/5/2014
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=hlh&AN=95061634&site=ehost-live header: @attributes: shortDbName: hlh uiTerm: 95061634 longDbName: Humanities International Complete uiTag: AN controlInfo: bkinfo: jinfo: jid: 00027863 ACS jtl: Journal of the American Chemical Society issn: 00027863 maglogo: N pubinfo: dt: 2/5/2014 vid: 136 iid: 5 pid: 997 pub: American Chemical Society artinfo: ui: 95061634 10.1021/ja412111f ppf: 1762 ppct: 4 formats: tig: atl: In Situ Live Observation of Nucleation and Dissolution of Sodium Chlorate Nanoparticles by Transmission Electron Microscopy. aug: au: Yuki Kimura Hiromasa Niinomi Katsuo Tsukamoto García-Ruiz, Juan M. affil: Department of Earth and Planetary Materials Science, Graduate School of Science, Tohoku University, Aramakiaza-Aoba 6-3, Aoba-ku, Sendai 980-8578, Japan Laboratorio de Estudios Cristalográficos, Instituto Andaluz de Ciencias de la Tierra, Consejo Superior de Investigaciones Científicas−Universidad de Granada, Av. de las Palmeras 4, 18100 Granada, Spain su: Nucleation Dissolution (Chemistry) Sodium chlorate Nanoparticles Transmission electron microscopy Crystallization Molecular self-assembly Ionic liquids sug: subj: Nucleation Dissolution (Chemistry) Sodium chlorate Nanoparticles Transmission electron microscopy Crystallization Molecular self-assembly Ionic liquids ab: The formation of crystals from solution requires the initial self-assembly of units of matter into stable periodic structures reaching a critical size. The early stages of this process , called nucleation, are very difficult to visualize. Here we describe a novel method that allows real time observation of the dynamics of nucleation and dissolution of sodium chlorate clusters in an ionic liquid solution using in situ transmission electron microscopy. Using ionic liquids as solvent circumvents the problem of evaporation and charging, while the nucleation frequency was reduced by using saturated solutions. We observe simultaneous formation and dissolution of prenucleation clusters, suggesting that high-density fluctuations leading to solid cluster formation exist even under equilibrium conditions. In situ electron diffraction patterns reveal the simultaneous formation of crystalline nuclei of two polymorphic structures, the stable cubic phase and the metastable monoclinic phase, during the earliest stages of nucleation. These results demonstrate that molecules in solution can form clusters of different polymorphic phases independently of their respective solubility. pubtype: Academic Journal doctype: Article src: R language: English refInfo: copyright: @attributes: flag: Y dt: @attributes: year: 2014 holdings: @attributes: islocal: N |
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