Impedance spectroscopy and dielectric properties of cobalt doped CdS nanoparticles
Impedance spectroscopy and dielectric properties of cobalt doped CdS nanoparticles
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DOI：
10.1016/j.powtec.2011.09.038
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发表时间：
2012-02
影响因子：
5.2
通讯作者：
M. Thambidurai;N. Muthukumarasamy;D. Velauthapillai;S. Agilan;R. Balasundaraprabhu
中科院分区：
文献类型：
--
作者：
M. Thambidurai;N. Muthukumarasamy;D. Velauthapillai;S. Agilan;R. Balasundaraprabhu
采用化学沉淀法制备了CdS和Co掺杂的CdS纳米粒子。X射线衍射分析表明，CdS和Co掺杂的CdS纳米颗粒呈六方结构，平均粒径为2.2 ~ 3.8nm。与CdS相比，Co掺杂CdS纳米粒子的拉曼光谱发生了红移，这可能是由于光学声子的限制。研究了CdS和Co掺杂CdS纳米粒子的阻抗（Z′和Z″）、电导率（σ）、电模量（M′和M″）、介电常数（ε′）和损耗角正切（tanδ）随Co浓度和温度的变化。
CdS and Co-doped CdS nanoparticles have been prepared using a chemical precipitation method. X-ray diffraction analysis reveals that CdS and Co doped CdS nanoparticles exhibit hexagonal structure and the average grain size is found to lie in the range of be 2.2 to 3.8nm. The Raman spectra of the Co-doped CdS nanoparticles exhibits a red-shift compared to that of CdS and this may be attributed to optical phonon confinement. The variation of impedance (Z′ and Z″), conductivity (σ), electric modulus (M′ and M″), dielectric constant (ε′) and loss tangent (tanδ) of CdS and Co-doped CdS nanoparticles as a function of cobalt concentration and temperature has been studied.