Synthesis, characterization and evaluation of tunable thermal diffusivity of phosphorus-doped carbon nanodot
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Synthesis, characterization and evaluation of tunable thermal diffusivity of phosphorus‑doped carbon nanodot Raji Mary Mathew1 · Elsa Susan Zachariah1 · Jasmine Jose1 · Titu Thomas2 · Jancy John1 · Timi Titus1 · Nisha G. Unni3 · S. Mathew4 · A. Mujeeb2 · Vinoy Thomas1 Received: 19 May 2020 / Accepted: 22 September 2020 © Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract Present study focusses to report the tunable thermal properties of phosphorus-doped carbon nanodot (PCND) using dual-beam mode matched thermal lens spectroscopic technique. The morphological, structural, and optical characterization of prepared carbon nanodot was probed by transmission electron microscopic technique (TEM), X-ray photoelectron spectroscopic technique (XPS), UV–visible absorption spectroscopic technique and photoluminescence spectroscopic technique. The average size of PCND was found to be 4.02 ± 0.13 nm. To date, there have been a few reports the thermal diffusivity and thermal conductivity of carbon dot by Dual-beam mode matched thermal lens spectroscopic technique. Among them, the present system has high value of thermal diffusivity (9.1139 ± 1.8644)*10−8 m2/s) and thermal conductivity (0.3807 ± 0.0778 W/ mK). The variation in thermal diffusivity and thermal conductivity of sample with different concentration was also recorded. The variation in thermal diffusivity values ranging from (9.1139 ± 1.8644)*10−8 m2/s to (2.9532 ± 0.8547)*10−8 m2/s indicates the tuning in heat transfer property of the present system by altering their concentration.These extend their application potential in microelectronic cooling as well as thermal insulation. Keywords Nanofluid · Carbon nanodot · Thermal lens · Thermal diffusivity
1 Introduction Current research seeks much attention in studying the thermophysical properties of nanomaterials that are widely used in thermal transistors, thermal diodes, thermal memory, electronic cooling, photothermal therapy, cancer treatment, imaging, etc. [1–5]. Thermal diffusivity is one of the thermal Electronic supplementary material The online version of this article (https://doi.org/10.1007/s00339-020-04014-2) contains supplementary material, which is available to authorized users. * Vinoy Thomas [email protected] 1
Centre for Functional Materials, Department of Physics, Christian College Chengannur, University of Kerala, Kerala 689122, India
2
International School of Photonics, Cochin University of Science and Technology, Cochin 22, India
3
Central Laboratory for Instrumentation and Facilitation, Kariavattam Campus, University of Kerala, Kerala 695034, India
4
Department of Physics, Kuwait University, Kuwait, Kuwait
properties which measures the faster movement of hot electron between the nanoparticles and surrounding medium [1, 4]. For controlling heat transfer in materials, nanofluids are currently developing which consists of semiconducting, metallic, ceramic or dielectric nanoparticles [5]. Nanofluids plays a crucial role in heat transfer performance which effect
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