Thermal conductivity analysis of nanofluid through laser speckle method

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2024-08-30 DOI:10.1088/1612-202x/ad7251

Jayashree Sa, Amita Tripathy, Ganeswar Nath

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Abstract

The significance of laser interaction in assessing the stability of colloidal CeO₂ nanoparticles (NPs) in water medium is highlighted in this study. Utilizing the laser speckle technique, a non-destructive optical method, the activities of NPs synthesized in continuous wave (CW) mode are examined. The size of the cerium oxide NPs is determined through Particle Size Analyzer technique. The fluctuation in intensity of laser speckle scattered from various particles reflects the configuration of NPs in the base fluid medium, offering valuable insights into their stability. Further confirmation of NP stability is obtained through UV–Visible absorption spectroscopy. The examination of CeO₂ NPs in deionized water is conducted with a CW mode He–Ne laser operating at 632 nm. This laser interaction approach proves to be instrumental in evaluating the thermal properties of the prepared samples, particularly the thermal conductivity, which shows enhancements at varying concentrations and temperatures. The findings demonstrate the potential of fabricating CeO₂-water nanofluids with improved thermal conductivity through laser interaction in a liquid medium, thereby eliminating the need for hazardous chemicals and vacuum conditions. This suggests promising applications in medium-temperature scenarios.

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通过激光斑点法分析纳米流体的导热性

本研究强调了激光相互作用在评估胶体 CeO2 纳米粒子（NPs）在水介质中稳定性方面的重要意义。利用激光斑点技术（一种非破坏性光学方法）检测了以连续波（CW）模式合成的 NPs 的活性。氧化铈 NPs 的尺寸是通过粒度分析仪技术测定的。从不同颗粒散射出的激光斑点的强度波动反映了 NPs 在基液介质中的构型，为了解其稳定性提供了宝贵的信息。紫外可见吸收光谱进一步证实了 NP 的稳定性。对去离子水中 CeO2 NPs 的检测是使用波长为 632 nm 的 CW 模式氦氖激光器进行的。事实证明，这种激光相互作用方法有助于评估所制备样品的热性能，特别是热导率，在不同浓度和温度下，热导率都有所提高。研究结果表明，通过激光在液体介质中的相互作用，可以制备出热导率更高的 CeO2-水纳米流体，从而无需使用危险化学品和真空条件。这表明在中温环境下的应用前景广阔。

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

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.