Study of thermal diffusivity coefficient of ultrathin metal layers using thermal lens spectroscopy

Q4 Physics and Astronomy
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引用次数: 0

Abstract

In spite of the incredible evolutions of advanced material characterization methods, this field of research faces different technical and scientific challenges. Thermal lens spectroscopy is known as a sensitive and nondestructive optical based technique to characterize the opto-thermal properties of materials and also to diagnose the impurities in the solutions. In this research, by engaging thermal lens spectroscopy, we investigate the thermal diffusivity coefficient of ultrathin silver layers, prepared by magnetron sputtering. For this propose, the Shen theoretical model is fitted to the obtained empirical signal and subsequently, the thermal diffusivity coefficient will be extracted. The results clearly show that, in the investigated interval thickness (<15nm), the thermal diffusivity coefficient increases by increasing the thickness. Furthermore, our findings reveal that in the very fine thickness region, the thermal diffusivity coefficient shows a fair dependence on the thickness of the silver layers. This might be explained by 2D behavior of the thermal diffusivity for ultrathin metal nanolayers.
用热透镜光谱法研究超薄金属层的热扩散系数
尽管先进的材料表征方法取得了令人难以置信的发展,但这一研究领域面临着不同的技术和科学挑战。热透镜光谱学是一种灵敏、无损的光学技术,用于表征材料的光热特性和诊断溶液中的杂质。在这项研究中,我们利用热透镜光谱研究了磁控溅射制备的超薄银层的热扩散系数。为此,将沈理论模型拟合到获得的经验信号中,然后提取热扩散系数。结果清楚地表明,在所研究的层厚(<15nm)内,随着层厚的增加,热扩散系数增大。此外,我们的研究结果表明,在非常细的厚度区域,热扩散系数对银层的厚度有一定的依赖性。这可以用超薄金属纳米层的二维热扩散率行为来解释。
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来源期刊
Iranian Journal of Physics Research
Iranian Journal of Physics Research Physics and Astronomy-Physics and Astronomy (all)
CiteScore
0.20
自引率
0.00%
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0
审稿时长
30 weeks
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