利用拉曼光谱直接探测温度,观察纳米尖端与基底之间纳米级距离的热传导增强情况

IF 3.6 2区 物理与天体物理 Q2 PHYSICS, APPLIED
Xiaona Huang, Qiangsheng Sun, Shen Xu, Yanan Yue, Xinwei Wang, Yimin Xuan
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引用次数: 0

摘要

两个纳米结构表面之间的纳米级热传递在极端制造和高密度数据存储领域具有极其重要的意义。然而,主要由于当前仪器的局限性,热传递的实验探测遇到了巨大挑战。在此,我们报告了一种基于拉曼光谱的方法,可直接探测硅纳米尖和碳化硅基底之间的温差。结果表明,当纳米尖从大约 82.5 纳米移至 1320 纳米时,基底温度降低,而纳米尖的温度保持相对稳定。我们从理论上将这种热传导的增强归因于空气传导和热辐射能量交换的显著增强(一个数量级),其中空气传导是热辐射的主要模式。这项工作利用非接触和无损拉曼技术,推进了对间隙小于 1 μm 的表面温度的直接观测,该技术可扩展用于研究各种拉曼活性表面的近场传热。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Observation of enhanced heat transfer between a nanotip and substrate at nanoscale distances via direct temperature probing with Raman spectroscopy
Nanoscale heat transfer between two nanostructured surfaces holds paramount significance in the realms of extreme manufacturing and high-density data storage. However, experimental probing of heat transfer encounters significant challenges, primarily due to limitations in current instrumentation. Here, we report a method based on Raman spectroscopy to directly probe the temperature difference between a Si nanotip and SiC substrate. Results indicate a decrease in substrate temperature, while the temperature of the nanotip remains relatively stable as the nanotip moves away from the substrate from approximately 82.5 to 1320 nm. We trace this enhanced heat transfer to a significant augmentation, by one order of magnitude, in air conduction and thermal radiation energy exchange theoretically, with air conduction being the dominant mode over thermal radiation. This work advances the direct observation of surface temperatures with gaps smaller than 1 μm, utilizing a noncontact and nondestructive Raman technique, which can be extended to studying near-field heat transfer across various Raman-active surfaces.
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来源期刊
Applied Physics Letters
Applied Physics Letters 物理-物理:应用
CiteScore
6.40
自引率
10.00%
发文量
1821
审稿时长
1.6 months
期刊介绍: Applied Physics Letters (APL) features concise, up-to-date reports on significant new findings in applied physics. Emphasizing rapid dissemination of key data and new physical insights, APL offers prompt publication of new experimental and theoretical papers reporting applications of physics phenomena to all branches of science, engineering, and modern technology. In addition to regular articles, the journal also publishes invited Fast Track, Perspectives, and in-depth Editorials which report on cutting-edge areas in applied physics. APL Perspectives are forward-looking invited letters which highlight recent developments or discoveries. Emphasis is placed on very recent developments, potentially disruptive technologies, open questions and possible solutions. They also include a mini-roadmap detailing where the community should direct efforts in order for the phenomena to be viable for application and the challenges associated with meeting that performance threshold. Perspectives are characterized by personal viewpoints and opinions of recognized experts in the field. Fast Track articles are invited original research articles that report results that are particularly novel and important or provide a significant advancement in an emerging field. Because of the urgency and scientific importance of the work, the peer review process is accelerated. If, during the review process, it becomes apparent that the paper does not meet the Fast Track criterion, it is returned to a normal track.
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