Tuning the Size and Shape of Oxide Nanoparticles by Controlling Oxygen Content in the Reaction Environment: Morphological Analysis by Aspect Maps
Source abstract
Abstract
The thermal decomposition of acetylacetonate precursors is one of the most employed syntheses to prepare high quality colloidal magnetic nanoparticles. In this paper, an advanced version of this synthetic approach was developed to prepare cobalt ferrite nanoparticles, 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 ∼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.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Magnetic Properties and Synthesis of Ferrites · Iron oxide chemistry and applications · Characterization and Applications of Magnetic Nanoparticles
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Istituto di Struttura della Materia - CNR, 00015 Monterotondo Scalo, Rome, Italy
Dipartimento di Fisica, Università di Cagliari, S.P. Monserrato-Sestu km 0.700, 09042 Monserrato, Cagliari, Italy
Department of Engineering Sciences, Uppsala University, Box 534, SE-751 21 Uppsala, Sweden
Department of Materials Science and Engineering, Norwegian University of Science and Technology (NTNU), NO-7491 Trondheim, Norway
SINTEF Materials and Chemistry, Biotechnology and Nanomedicine Sector, Trondheim NO-7491, Norway
Funding
Regione Autonoma della Sardegna · Vetenskapsrådet · Göran Gustafssons Stiftelse för Naturvetenskaplig och Medicinsk Forskning
References (63)
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