ABSTRACT

Impedance spectroscopy-based electrical measurements were conducted on different molecular weight (MW) Poly(1,6-heptadiyne)s (PHDs) embedded PHD/NiFe₂O₄ nanocomposites. Nanocomposites conductivity result demonstrated the conductivities of around $3.5\times {10}^{-6}-16\times {10}^{-6}\mathrm{S}\mathrm{C}{\mathrm{m}}^{-1}$ (nanocomposite Root mean square (RMS) current is 12–15 times greater than DC current of PHDs at 27° C). Additionally, dielectric loss and capacitance characteristics suggested the nanocomposite (4500 MW PHD) device quality factor is 35.7 at 1 kHz, which is ~13.89 times superior than that of NiFe₂O₄ alone sample, also ‘Q’ value for highest MW PHD nanocomposite is 50% enhanced than NiFe₂O₄. Moreover, the capacitance result suggested the 12400 MW PHD nanocomposite nearly frequency-independent capacitance (15–20pF) over a frequency range of 500 Hz–500 kHz.

摘要

在不同分子量（MW）的PHD / NiFe ₂ O ₄纳米复合材料中，对不同分子量（MW）的聚（1,6-庚二炔）（PHDs）进行了基于阻抗谱的电测量。纳米复合材料的电导率结果表明$3.5\times {10}^{-6}-16\times {10}^{-6}\mathrm{小号}\mathrm{C}{\mathrm{米}}^{-\mathrm{1个}}$（纳米复合均方根（RMS）电流是27°C时PHD的DC电流的12–15倍）。此外，介电损耗和电容特性表明，纳米复合材料（4500 MW PHD）的器件品质因数在1 kHz时为35.7，比单独的NiFe ₂ O ₄样品高约13.89倍，也是最高MW PHD纳米复合材料的'Q'值比NiFe ₂ O ₄增强50％。此外，电容结果表明12400 MW PHD纳米复合材料在500 Hz至500 kHz的频率范围内具有几乎与频率无关的电容（15-20pF）。