{"title":"Influence of morphology on thermal properties of Mn3O4 nanoparticles - A thermal lens study","authors":"","doi":"10.1016/j.nanoso.2024.101396","DOIUrl":null,"url":null,"abstract":"<div><div>The shape dependent optical and thermal properties of Mn<sub>3</sub>O<sub>4</sub> nanostructures synthesized via precipitation method is investigated in the present study. By varying the stirring temperature during the precipitation process, a series of nanoparticles with distinct morphologies were produced, transitioning from agglomerated structures to nanorods and further to nanocubes. Notably, the morphological evolution of Mn<sub>3</sub>O<sub>4</sub> nanoparticles as influenced by stirring temperature has not been previously documented in the literature. The thermal diffusivity of Mn<sub>3</sub>O<sub>4</sub> nanoparticles was quantified through a dual beam collinear thermal lens technique. An increase in stirring temperature resulted in the variation in thermal diffusivity values which substantiates the role of morphology in governing the thermo-optic characteristics of Mn<sub>3</sub>O<sub>4</sub>. The alterations are explained using absorption and emission spectra analysis. The thermal diffusivity values of Mn<sub>3</sub>O<sub>4</sub> nanoparticles were found to be more than that of the base fluid, ethylene glycol (0.93 ×10<sup>−7</sup> m<sup>2</sup>/s) varying between 5.71 ×10<sup>−7</sup> m<sup>2</sup>/s to 24.93 ×10<sup>−7</sup> m<sup>2</sup>/s. The exceptionally high thermal diffusivity values found in these samples suggest their potential for various technological applications, particularly in cooling systems. This study emphasizes the relationship between morphology and thermal properties, paving the way for the development of materials with tailored thermal behaviors for a wide range of applications.</div></div>","PeriodicalId":397,"journal":{"name":"Nano-Structures & Nano-Objects","volume":null,"pages":null},"PeriodicalIF":5.4500,"publicationDate":"2024-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Nano-Structures & Nano-Objects","FirstCategoryId":"1","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2352507X24003081","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"Physics and Astronomy","Score":null,"Total":0}
引用次数: 0
Abstract
The shape dependent optical and thermal properties of Mn3O4 nanostructures synthesized via precipitation method is investigated in the present study. By varying the stirring temperature during the precipitation process, a series of nanoparticles with distinct morphologies were produced, transitioning from agglomerated structures to nanorods and further to nanocubes. Notably, the morphological evolution of Mn3O4 nanoparticles as influenced by stirring temperature has not been previously documented in the literature. The thermal diffusivity of Mn3O4 nanoparticles was quantified through a dual beam collinear thermal lens technique. An increase in stirring temperature resulted in the variation in thermal diffusivity values which substantiates the role of morphology in governing the thermo-optic characteristics of Mn3O4. The alterations are explained using absorption and emission spectra analysis. The thermal diffusivity values of Mn3O4 nanoparticles were found to be more than that of the base fluid, ethylene glycol (0.93 ×10−7 m2/s) varying between 5.71 ×10−7 m2/s to 24.93 ×10−7 m2/s. The exceptionally high thermal diffusivity values found in these samples suggest their potential for various technological applications, particularly in cooling systems. This study emphasizes the relationship between morphology and thermal properties, paving the way for the development of materials with tailored thermal behaviors for a wide range of applications.
期刊介绍:
Nano-Structures & Nano-Objects is a new journal devoted to all aspects of the synthesis and the properties of this new flourishing domain. The journal is devoted to novel architectures at the nano-level with an emphasis on new synthesis and characterization methods. The journal is focused on the objects rather than on their applications. However, the research for new applications of original nano-structures & nano-objects in various fields such as nano-electronics, energy conversion, catalysis, drug delivery and nano-medicine is also welcome. The scope of Nano-Structures & Nano-Objects involves: -Metal and alloy nanoparticles with complex nanostructures such as shape control, core-shell and dumbells -Oxide nanoparticles and nanostructures, with complex oxide/metal, oxide/surface and oxide /organic interfaces -Inorganic semi-conducting nanoparticles (quantum dots) with an emphasis on new phases, structures, shapes and complexity -Nanostructures involving molecular inorganic species such as nanoparticles of coordination compounds, molecular magnets, spin transition nanoparticles etc. or organic nano-objects, in particular for molecular electronics -Nanostructured materials such as nano-MOFs and nano-zeolites -Hetero-junctions between molecules and nano-objects, between different nano-objects & nanostructures or between nano-objects & nanostructures and surfaces -Methods of characterization specific of the nano size or adapted for the nano size such as X-ray and neutron scattering, light scattering, NMR, Raman, Plasmonics, near field microscopies, various TEM and SEM techniques, magnetic studies, etc .