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Superparamagnetic and Perfect-Paramagnetic Zinc Ferrite Quantum Dots from Microwave-Assisted Tunable Synthesis
[Image: see text] The properties of quantum dot (QD)-size material depend directly upon its unit cell structure. Spinel zinc ferrite QD powder is produced via a one-pot microwave-assisted hydrothermal synthesis for just 5 min. Varying initial pH values of the preparation sol from 6 to 12 enlarges th...
Autores principales: | , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
American Chemical Society
2022
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9453939/ https://www.ncbi.nlm.nih.gov/pubmed/36092622 http://dx.doi.org/10.1021/acsomega.2c04668 |
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author | Parmar, Kanak Pal S. Kim, Jeong Hun Bist, Amita Dua, Piyush Tiwari, Pawan K. Phuruangrat, Anukorn Lee, Jae Sung |
author_facet | Parmar, Kanak Pal S. Kim, Jeong Hun Bist, Amita Dua, Piyush Tiwari, Pawan K. Phuruangrat, Anukorn Lee, Jae Sung |
author_sort | Parmar, Kanak Pal S. |
collection | PubMed |
description | [Image: see text] The properties of quantum dot (QD)-size material depend directly upon its unit cell structure. Spinel zinc ferrite QD powder is produced via a one-pot microwave-assisted hydrothermal synthesis for just 5 min. Varying initial pH values of the preparation sol from 6 to 12 enlarges the Zn/Fe atomic ratio (by ca. 10%), unit cell volume (by ca. 0.5%), particle size (3.5–4.5 nm), and degree of inversion. This leads to a change in the magnetic behavior of the QD-size zinc ferrite from a superparamagnetic to a perfect-paramagnetic type. This novel finding points that the significant changes in the inherent structural parameters of spinel ZnFe(2)O(4) QDs (Zn/Fe ratio and degree of inversion) induced by the systematic pH change of the preparation sol are exclusively responsible for the observed unique magnetic behavior instead of mere QD (single domain) nanosizes. |
format | Online Article Text |
id | pubmed-9453939 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | American Chemical Society |
record_format | MEDLINE/PubMed |
spelling | pubmed-94539392022-09-09 Superparamagnetic and Perfect-Paramagnetic Zinc Ferrite Quantum Dots from Microwave-Assisted Tunable Synthesis Parmar, Kanak Pal S. Kim, Jeong Hun Bist, Amita Dua, Piyush Tiwari, Pawan K. Phuruangrat, Anukorn Lee, Jae Sung ACS Omega [Image: see text] The properties of quantum dot (QD)-size material depend directly upon its unit cell structure. Spinel zinc ferrite QD powder is produced via a one-pot microwave-assisted hydrothermal synthesis for just 5 min. Varying initial pH values of the preparation sol from 6 to 12 enlarges the Zn/Fe atomic ratio (by ca. 10%), unit cell volume (by ca. 0.5%), particle size (3.5–4.5 nm), and degree of inversion. This leads to a change in the magnetic behavior of the QD-size zinc ferrite from a superparamagnetic to a perfect-paramagnetic type. This novel finding points that the significant changes in the inherent structural parameters of spinel ZnFe(2)O(4) QDs (Zn/Fe ratio and degree of inversion) induced by the systematic pH change of the preparation sol are exclusively responsible for the observed unique magnetic behavior instead of mere QD (single domain) nanosizes. American Chemical Society 2022-08-23 /pmc/articles/PMC9453939/ /pubmed/36092622 http://dx.doi.org/10.1021/acsomega.2c04668 Text en © 2022 The Authors. Published by American Chemical Society https://creativecommons.org/licenses/by-nc-nd/4.0/Permits non-commercial access and re-use, provided that author attribution and integrity are maintained; but does not permit creation of adaptations or other derivative works (https://creativecommons.org/licenses/by-nc-nd/4.0/). |
spellingShingle | Parmar, Kanak Pal S. Kim, Jeong Hun Bist, Amita Dua, Piyush Tiwari, Pawan K. Phuruangrat, Anukorn Lee, Jae Sung Superparamagnetic and Perfect-Paramagnetic Zinc Ferrite Quantum Dots from Microwave-Assisted Tunable Synthesis |
title | Superparamagnetic
and Perfect-Paramagnetic Zinc Ferrite
Quantum Dots from Microwave-Assisted Tunable Synthesis |
title_full | Superparamagnetic
and Perfect-Paramagnetic Zinc Ferrite
Quantum Dots from Microwave-Assisted Tunable Synthesis |
title_fullStr | Superparamagnetic
and Perfect-Paramagnetic Zinc Ferrite
Quantum Dots from Microwave-Assisted Tunable Synthesis |
title_full_unstemmed | Superparamagnetic
and Perfect-Paramagnetic Zinc Ferrite
Quantum Dots from Microwave-Assisted Tunable Synthesis |
title_short | Superparamagnetic
and Perfect-Paramagnetic Zinc Ferrite
Quantum Dots from Microwave-Assisted Tunable Synthesis |
title_sort | superparamagnetic
and perfect-paramagnetic zinc ferrite
quantum dots from microwave-assisted tunable synthesis |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9453939/ https://www.ncbi.nlm.nih.gov/pubmed/36092622 http://dx.doi.org/10.1021/acsomega.2c04668 |
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