ArticleThe journal of physical chemistry letters2019
Shaping Magnetite with Poly-l-arginine and pH: From Small Single Crystals to Large Mesocrystals.
Article in The journal of physical chemistry letters, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
What it found
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Who cites it
4 citing papers in PubMed, 17 citations in OpenAlex.
- Size Control of Highly Monodisperse Citrate-Stabilized Magnetite Nanoparticles in Aqueous Media: The Role of Cerium Cations.Chemistry of materials : a publication of the American Chemical Society · 2025Article
- Magnetochrome-catalyzed oxidation of ferrous iron by MamP enables magnetite crystal growth in the magnetotactic bacterium AMB-1.Proceedings of the National Academy of Sciences of the United States of America · 2024Article
- Nonclassical Crystallization and Core-Shell Structure Formation of Ibuprofen from Binary Solvent Solutions.Crystal growth & design · 2023Article
- Wettability of Magnetite Nanoparticles Guides Growth from Stabilized Amorphous Ferrihydrite.Journal of the American Chemical Society · 2021Article
Corrections and comments
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Authors and funding
5 authors at 3 institutions in 3 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Control over particle size, size distribution, and colloidal stability are central aims in producing functional nanomaterials. Recently, biomimetic approaches have been successfully used to enhance control over properties in the synthesis of those materials. Magnetotactic bacteria produce protein-stabilized magnetite away from its thermodynamic equilibrium structure. Mimicking the bacteria's proteins using poly-l-arginine we show that by simply increasing the pH, the dimensions of magnetite increase and a single- to mesocrystal transformation is induced. Using synchrotron X-ray diffraction and transmission electron microscopy, we show that magnetite nanoparticles with narrow size distributions and average diameters of 10 ± 2 nm for pH 9, 20 ± 2 nm for pH 10, and up to 40 ± 4 nm for pH 11 can be synthesized. We thus selectively produce superparamagnetic and stable single-domain particles merely by controlling the pH. Remarkably, while an increase in pH brings about a thermodynamically driven decrease in size for magnetite without additives, this dependency on pH is inverted when poly-l-arginine is present.
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Registered trials
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