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首页> 外文期刊>Journal of Applied Polymer Science >Microstructural, wetting, and dielectric properties of plasma polymerized polypyrrole thin films
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Microstructural, wetting, and dielectric properties of plasma polymerized polypyrrole thin films

机译：等离子体聚合的聚吡咯薄膜的微观结构，润湿性和介电性能

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摘要

Polypyrrole (PPy) thin films were synthesized by plasma polymerization technique and investigated the influence of discharge power on microstructural, optical, surface wettability, and dielectric properties of grown films. As deposited PPy films were characterized by X-ray diffraction (XRD), Fourier transform Infrared spectroscopy (FTIR), Atomic force microscopy, UV-VIS spectroscopy and dielectric spectroscopy. The broad XRD peak present at 2 theta = 23.5 degrees revealed the amorphous nature of grown PPy films. The FTIR spectra displayed characteristic peaks in the wavenumbers regions 3300-3400 cm(-1) and 1635-1700 cm(-1) and respective peaks intensities decreased slightly as a function of discharge powers. Significant modifications in surface morphology of the films were observed as a function of discharge powers and PPy films synthesized at higher discharge power of 50 W demonstrated characteristic surface morphology composed of characteristic vertical cone shaped clusters provided with rms roughness of 3.42 nm. The UV-VIS absorption spectra evidenced that the optical density values varied as a function of discharge power. The evaluated band gap energies decreased with an increase of discharge power and found to be 2.53 eV for PPy films prepared at higher discharge power of 50 W. The surface wettability studies evidenced that as prepared PPy films were found to be hydrophilic in nature. The dielectric measurements were carried out for "ITO/polymer/ITO" structures in the frequency range 10 mHz to 100 kHz. As evidenced from dielectric spectroscopic measurements, PPy films synthesized at 50 W were demonstrated conductivity value of 6.0 x 10(-12) S/m. (C) 2016 Wiley Periodicals, Inc.
机译：通过等离子体聚合技术合成了聚吡咯（PPy）薄膜，研究了放电功率对生长薄膜的微观结构，光学，表面润湿性和介电性能的影响。通过X射线衍射（XRD），傅立叶变换红外光谱（FTIR），原子力显微镜，UV-VIS光谱和介电光谱对沉积的PPy膜进行表征。存在于2θ= 23.5度的宽XRD峰揭示了生长的PPy膜的无定形性质。 FTIR光谱在波数区域3300-3400 cm（-1）和1635-1700 cm（-1）中显示了特征峰，并且各个峰强度随放电功率的变化而略有降低。观察到膜表面形态的显着变化是放电功率的函数，在50 W的较高放电功率下合成的PPy膜表现出由具有3.42 nm rms粗糙度的特征性垂直锥形簇组成的特征性表面形态。 UV-VIS吸收光谱证明，光密度值随放电功率的变化而变化。评估的带隙能量随放电功率的增加而降低，发现以50 W的更高放电功率制备的PPy膜的带隙能量为2.53 eV。表面润湿性研究表明，制备的PPy膜本质上是亲水的。对于“ ITO /聚合物/ ITO”结构，在10 mHz至100 kHz的频率范围内进行了介电测量。从介电谱测量中可以看出，在50 W功率下合成的PPy薄膜的电导率值为6.0 x 10（-12）S / m。 （C）2016威利期刊公司

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