Synthesis, characterization and evaluation of tunable thermal diffusivity of phosphorus-doped carbon nanodot

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.