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Acoustic shock wave processing on amorphous carbon quantum dots - correlation between spectroscopic-morphological-magnetic and electrical conductivity properties

文献类型:期刊论文

作者Sivakumar Aswathappa; Lidong Dai; S. Sahaya Jude Dhas; Priyadharshini Matheswaran; Raju Suresh Kumar; Vasanthi Thangavel; V.N. Vijayakumar
刊名Ceramics International
出版日期2024
卷号50期号:10页码:17011-17019
关键词Carbon Quantum Dots shock Waves raman Spectroscopy saturation Magnetization
DOI10.1016/j.ceramint.2024.02.178
英文摘要

In this context, we report the acoustic shock wave processing on amorphous Carbon quantum dots (a-CQD) such that its degree of graphitization and magnetic properties are analyzed. Analytical techniques such as the Raman spectrometer, high resonation–transmission electron microscopy (HR-TEM) and vibrating sample magnetometer (VSM) are utilized to understand the structural, morphological and magnetic properties changes under shocked conditions. The Raman spectroscopic data reveal that the ID/IG ratio is slightly reduced under shocked conditions and the observed values are 0.78, 0.77 and 0.75 for the respective 0, 150 and 300 shocked conditions. The formation of ultra-short-range graphitic nanostructures is confirmed by HR-TEM results at the 300-shocked condition. The most convincing and supporting results for the enhancement of the degree of graphitization are found by the outcome of the magnetic properties such that the saturation magnetization (Ms) is found to be linearly reduced with respect to the number of shock pulses and the observed values are 0.869, 0.757 and 0.710 emu/g for the 0, 150 and 300 shocked conditions, respectively. The electrical resistance of the a-CQD is found to be linearly reduced with respect to the number of shock pulses due to the reduction of sp3 carbon networks. The formation of crystalline graphitic nanostructures in amorphous CQD is explained on the basis of the hot-spot nucleation mechanism. Based on the obtained Raman, HR-TEM and VSM results, during the shocked conditions, slight enhancement of the graphitization is observed; however, from the structural stability point of view, the Carbon dots have high shock resistance than that of the amorphous carbon nanoparticles, multi-wall carbon nanotubes, and reduced graphene oxide nanoparticles. Hence, the title quantum dots can be strongly considered for the applications of device fabrication.

 

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专题地球化学研究所_地球内部物质高温高压实验室
作者单位1.Key Laboratory of High-temperature and High-pressure Study of the Earth's Interior, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, Guizhou, 550081, China
2.Saveetha School of Engineering, Saveetha Institute of Medical and Technical Sciences, Saveetha University, Chennai, Tamil Nadu, 602105, India
3.Institut de Recherche Dupuy de Lome, UMR CNRS 6027, Lorient, 56100, France
4.Department of Chemistry, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
5.Department of Physics, PPG Institute of Technology, Coimbatore, Tamilnadu, 641 035, India
6.Department of Physics, Condensed Matter Research Laboratory, Bannari Amman Institute of Technology, Sathyamangalam, Tamil Nadu, 638 401, India
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Sivakumar Aswathappa,Lidong Dai,S. Sahaya Jude Dhas,et al. Acoustic shock wave processing on amorphous carbon quantum dots - correlation between spectroscopic-morphological-magnetic and electrical conductivity properties[J]. Ceramics International,2024,50(10):17011-17019.
APA Sivakumar Aswathappa.,Lidong Dai.,S. Sahaya Jude Dhas.,Priyadharshini Matheswaran.,Raju Suresh Kumar.,...&V.N. Vijayakumar.(2024).Acoustic shock wave processing on amorphous carbon quantum dots - correlation between spectroscopic-morphological-magnetic and electrical conductivity properties.Ceramics International,50(10),17011-17019.
MLA Sivakumar Aswathappa,et al."Acoustic shock wave processing on amorphous carbon quantum dots - correlation between spectroscopic-morphological-magnetic and electrical conductivity properties".Ceramics International 50.10(2024):17011-17019.

入库方式: OAI收割

来源:地球化学研究所

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