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Tuning the Size and Shape of Oxide Nanoparticles by Controlling Oxygen Content in the Reaction Environment : Morphological Analysis by Aspect Maps
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- Muscas, Giuseppe (author)
- Uppsala universitet,Materialfysik
- Singh, G. (author)
- Glomm, W. R. (author)
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- Concas, G. (author)
- Agostinelli, E. (author)
- Peddis, D. (author)
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- (creator_code:org_t)
- 2015-03-06
- 2015
- English.
- In: Chemistry of Materials. - : American Chemical Society (ACS). - 0897-4756 .- 1520-5002. ; 27:6, s. 1982-1990
- Journal article (peer-reviewed)
Abstract
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- The thermal decomposition of acetylacetonate precursors is one of the most employed syntheses to prepare high quality colloidal magnetic nanopartides. In this paper, an advanced version of this synthetic approach was developed to prepare cobalt ferrite nanopartides, introducing for the first time a rigorous control on one commonly neglected reaction parameter, that is, the residual oxygen content in the reaction environment. A new concept derived from the statistical analysis of S(T)EM images, i.e., the so-called aspects maps, was introduced: this tool has allowed us to clearly identify the optimal value of pressure to produce particles with an average size,similar to 19 nm and with a very narrow size distribution (polydispersity 0.4 nm(-1)). The magnetic properties of this sample were also analyzed, and a strong improvement of the magnetization reversal mechanism, which is a critical issue for several technological applications, was observed.
Subject headings
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
Keyword
- Teknisk fysik med inriktning mot fasta tillståndets fysik
- Engineering Science with specialization in Solid State Physics
Publication and Content Type
- ref (subject category)
- art (subject category)
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- Muscas, Giuseppe
- Singh, G.
- Glomm, W. R.
- Mathieu, Roland
- Kumar Puri, Anil
- Concas, G.
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- Agostinelli, E.
- Peddis, D.
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- Uppsala University
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