Academic Journal
The Role of Growth Directors in Controlling the Morphology of Hematite Nanorods
| العنوان: | The Role of Growth Directors in Controlling the Morphology of Hematite Nanorods |
|---|---|
| المؤلفون: | Christopher J. Allender, Jenna L. Bowen, Veronica Celorrio, Josh A. Davies-Jones, Philip R. Davies, Shaoliang Guan, Padraic O’Reilly, Meenakshisundaram Sankar |
| المصدر: | Nanoscale Research Letters, Vol 15, Iss 1, Pp 1-12 (2020) |
| بيانات النشر: | SpringerOpen, 2020. |
| سنة النشر: | 2020 |
| المجموعة: | LCC:Materials of engineering and construction. Mechanics of materials |
| مصطلحات موضوعية: | Nanorod, Crystal growth, Aspect ratio, PIFM, Nanospindle, Materials of engineering and construction. Mechanics of materials, TA401-492 |
| الوصف: | Abstract The control of the growth of hematite nanoparticles from iron chloride solutions under hydrothermal conditions in the presence of two different structure promoters has been studied using a range of both structural and spectroscopic techniques including the first report of photo induced force microscopy (PiFM) to map the topographic distribution of the structure-directing agents on the developing nanoparticles. We show that the shape of the nanoparticles can be controlled using the concentration of phosphate ions up to a limit determined to be ~6 × 10−3 mol. Akaganéite (β-FeOOH) is a major component of the nanoparticles formed in the absence of structure directors but only present in the very early stages (< 8 h) of particle growth when phosphate is present. The PiFM data suggest a correlation between the areas in which phosphate ions are adsorbed and areas where akaganéite persists on the surface. In contrast, goethite (α-FeOOH) is a directly observed precursor of the hematite nanorods when 1,2-diamino propane is present. The PiFM data shows goethite in the center of the developing particles consistent with a mechanism in which the iron hydroxide re-dissolves and precipitates at the nanorod ends as hematite. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 1556-276X 12828939 |
| Relation: | http://link.springer.com/article/10.1186/s11671-020-03387-w; https://doaj.org/toc/1556-276X |
| DOI: | 10.1186/s11671-020-03387-w |
| URL الوصول: | https://doaj.org/article/f85b9786fd024e12828939f10b7abd82 |
| رقم الانضمام: | edsdoj.f85b9786fd024e12828939f10b7abd82 |
| قاعدة البيانات: | Directory of Open Access Journals |
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