Influence of morphology on thermal properties of Mn3O4 nanoparticles - A thermal lens study

IF 5.45 Q1 Physics and Astronomy

Nano-Structures & Nano-Objects Pub Date : 2024-11-04 DOI:10.1016/j.nanoso.2024.101396

Jayaprasad K V, Titu Thomas, Ramya Manikandan, Manu Vaishakh, Sheenu Thomas

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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.

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形态对 Mn3O4 纳米粒子热特性的影响 - 热透镜研究

本研究探讨了通过沉淀法合成的 Mn3O4 纳米结构的光学和热学特性。通过改变沉淀过程中的搅拌温度，产生了一系列形态各异的纳米粒子，从团聚结构过渡到纳米棒，再进一步过渡到纳米立方体。值得注意的是，Mn3O4 纳米粒子的形态演变受搅拌温度的影响，这在以前的文献中还没有记载。通过双光束准直热透镜技术对 Mn3O4 纳米粒子的热扩散率进行了量化。搅拌温度的升高导致了热扩散率值的变化，这证实了形态在控制 Mn3O4 热光学特性中的作用。吸收光谱和发射光谱分析解释了这些变化。研究发现，Mn3O4 纳米粒子的热扩散率值高于基液乙二醇（0.93 ×10-7 m2/s），在 5.71 ×10-7 m2/s 至 24.93 ×10-7 m2/s 之间变化。在这些样品中发现的极高的热扩散率值表明它们具有各种技术应用的潜力，尤其是在冷却系统中。这项研究强调了形态与热性能之间的关系，为开发具有定制热行为的材料铺平了道路，使其应用范围更加广泛。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Nano-Structures & Nano-Objects Physics and Astronomy-Condensed Matter Physics

CiteScore

9.20

自引率

0.00%

发文量

审稿时长

22 days

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 .