纳米线
材料科学
电介质
兴奋剂
带隙
锌
粒径
纳米技术
光电子学
分析化学(期刊)
化学工程
化学
冶金
色谱法
工程类
作者
Dhiraj Kumar Bharti,Ketki Verma,Avanish Kumar Srivastava,Manoj Kumar Gupta
摘要
In this study, pristine and cobalt (Co) doped zinc silicate (Zn2SiO4) nanowires were synthesized by a simple and cost-effective hydrothermal method. The average length and diameter of Zn2SiO4 nanowires were 1.0–1.5 μm and 40–60 nm, respectively, in electron microscopic studies. In the case of Co-doped Zn2SiO4 nanowires, average length and diameter increase to 4.0–5.0 μm and 70–90 nm, respectively, and a significant increase in particle size was observed. A dielectric constant measurement of pristine and Co-doped Zn2SiO4 nanowires was performed in the frequency range of 20 Hz–2 MHz. The dielectric constant of pristine and Co-doped Zn2SiO4 nanowires was found to be 212 and 1360 at a frequency of 20 Hz, respectively. Such dramatic enhancement in the dielectric constant (approximately six fold) of Co-doped Zn2SiO4 nanowires suggests that these nanowires are promising materials for applications in next generation charge storage devices. UV–Vis spectral analysis shows a remarkable reduction in the optical bandgap of Co-doped Zn2SiO4 nanowires as a result of doping. Such enhancement in the dielectric constant and reduction in the optical bandgap were discussed in light of doping and size enhancement.
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