Polymeric Nanocomposites Membranes with High Permittivity Based on PVA-ZnO Nanoparticles for Potential Applications in Flexible Electronics
Polymeric Nanocomposites Membranes with High Permittivity Based on PVA-ZnO Nanoparticles for Potential Applications in Flexible Electronics
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DOI：
10.3390/polym10121370
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发表时间：
2018-12-01
期刊：
影响因子：
5
通讯作者：
Vivaldo, Israel
中科院分区：
文献类型：
--
作者：
Ambrosio, Roberto;Carrillo, Amanda;Vivaldo, Israel
本研究报告的光学，结构，电气和介电性能的聚（乙烯醇）薄膜膜嵌入ZnO纳米粒子（PVA/ZnO）的溶液浇铸法在低温沉积。傅里叶变换红外光谱显示出特征峰，对应于杂化材料中存在的O-H和Zn-O键。X射线衍射分析表明薄膜中存在ZnO结构。该复合材料表现出低吸光度和从5.5至5.83 eV的宽带隙能量。用原子力显微镜和扫描电子显微镜研究了PVA/ZnO薄膜的表面形貌。膜的电性能也通过电流-电压特性表征，并且DC电导率显示Arrhenius行为，活化能值为0.62至0.78 eV，最大电导率为2.4 × 10（-12）S/cm。从低频到高频测量纳米复合材料的介电性能，并且结果显示在低频下约为10（4）的高介电常数（ε）和在1 KHz-1 MHz范围内分别从ε接近2000至100的值。PVA/ZnO的高介电常数和低加工温度等特性使其在柔性电子器件的开发中具有潜在的应用前景。
This study reports the optical, structural, electrical and dielectric properties of Poly (vinyl alcohol) thin films membranes with embedded ZnO nanoparticles (PVA/ZnO) obtained by the solution casting method at low temperature of deposition. Fourier Transform Infrared spectra showed the characteristics peaks, which correspond to O-H and Zn-O bonds present in the hybrid material. The X-ray diffraction patterns indicated the presence of ZnO structure into the films. The composite material showed low absorbance and a wide band of gap energy from 5.5 to 5.83 eV. The surface morphology for the thin films of PVA/ZnO was studied by Atomic Force Microscopy and Scanning Electron Microscopy. The electrical properties of the membranes were also characterized by current-voltage characteristics and the DC conductivity showed Arrhenius behavior with values of activation energy from 0.62 to 0.78 eV and maximum conductivity at 2.4 x 10(-12) S/cm. The dielectric properties of the nanocomposites were measured from low to high frequencies, and the results showed a high dielectric constant (epsilon) in the order of 10(4) at low frequency and values from epsilon approximate to 2000 to 100 in the range of 1 KHz-1 MHz respectively. The properties of PVA/ZnO such as the high permittivity and the low temperature of processing make it a suitable material for potential applications in the development of flexible electronic devices.