Observation of intrinsic fluorescence in cobalt ferrite magnetic nanoparticles by Mn²⁺ substitution and tuning the spin dynamics by cation distribution

Abstract

In this work, we report the synthesis and detailed characterization of single domain optically active manganese substituted cobalt ferrite (CoFe2O4) magnetic nanoparticles without any surface functionalization as a fluorescent probe...

Synthesis and Characterization of Highly Crystalline Bi-Functional Mn-Doped Zn2SiO4 Nanostructures by Low-Cost Sol–Gel Process

“…In low concentration, the Jahn–Teller effect would be expected to cause a reduction in the tendency toward ferromagnetism since it leads to a splitting of the states. The splitting will reduce the interactions between Mn pairs since hopping requires an extra energy [ 9 , 14 , 34 , 35 , 50 ]. On the other hand, the interaction between Mn–Mn pairs at realistic distances is sufficiently large that it dominates over the Jahn–Teller effect.…”

“…Therefore, tailoring of these nanomaterials for their desired properties is extremely important, especially for applications in advanced portable devices [ 7 , 8 , 9 , 10 , 11 , 12 ]. There are several nanomaterials which show tunability with size, shape, and properties with variation of doping concentration [ 9 , 13 , 14 , 15 , 16 ]. Zinc silicate especially (Zn 2 SiO 4 ) is a promising candidate for applications in flat panel optical displays, UV detectors, gas sensors, adsorption of toxic ions from water, and thin film electro-luminescence devices applications [ 17 , 18 , 19 ].…”

Recent Advancements in Plant- and Microbe-Mediated Synthesis of Metal and Metal Oxide Nanomaterials and Their Emerging Antimicrobial Applications

“…Nanotechnology has evolved as cutting-edge technology in variety of sectors due to the unique, interesting, and improved properties of nanomaterials. Nanomaterials have at least one particle dimension in nanometer range (1–100 nm), and their properties are significantly different owing to higher surface area compared to bulk phase of the material. − The properties of nanoparticles (NPs) vary with morphology, composition, and purity which allows tunability of the properties according to application requirements. − Nanotechnology has made significant advancements in different sectors such as medical, , agricultural, electronic, − engineering, , computational, and materials science. ,− In the last few decades, biomedical applications such as drug delivery, anticancer activity, antimicrobial activity, topical gel activity, dental tissue engineering, bone repair, topical imaging, and SERS of NPs have gained significant attention employing their superior properties. − …”

“…The toxicity and biocompatibility of the NPs always remain the key challenges. ,− Biomolecule sensing enzyme immobilization is one of the methods used to improve the biocompatibility of NPs. − The toxicity related to these materials can be controlled by adopting modified synthesis approaches . The production of NPs using conventional approaches results in toxic wastes and byproducts, which significantly contribute to environmental contamination. − Green synthesis provides a reliable and sustainable alternative to these methods in which plants (leaves, barks, flower, fruits, and seeds), microorganisms (yeast, bacteria, viruses, actinomycetes), and biotemplates are used to produce NPs. − The traditional procedures screen out dangerous compounds that not only create significant concerns when used for clinical applications in individuals but also poison the environment through waste. − Green-synthesized NPs contribute to low toxicity and provides safety for human health and the environment compared to other conventional methods. − …”

Correlating the Dipolar Interactions Induced Magneto‐Viscoelasticity and Thermal Conductivity Enhancements in Nanomagnetic Fluids

“…[3][4][5] Magnetic materials have played a crucial role in many of these applications. [10,11,[6][7][8][9] Recent technical breakthroughs in the fields of electronics and thermal systems have evolved in an ever-increasing demand for more efficient heat transfer systems. [12][13][14][15] Improving heat transfer efficiency in industrial technologies for better heating or cooling performance has emerged as a major research area in thermal engineering.…”