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首页> 外文会议>International Vacuum Nanoelectronics Conference >Field emission investigation of composites of Polypyrrole with graphene oxide, reduced graphene oxide and graphene nanoribbons
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Field emission investigation of composites of Polypyrrole with graphene oxide, reduced graphene oxide and graphene nanoribbons

机译：聚吡咯与氧化石墨烯，还原氧化石墨烯和石墨烯纳米带的复合材料的场发射研究

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The monomer pyrrole has been polymerized by chemical route in the presence of graphene oxide (GO), reduced graphene oxide (rGO) and graphene nanoribbons (GNR) separately to prepare nanocomposites as Polypyrrole-GO (PGO), PPy-rGO (PRGO), PPy-GNR (PGNR), respectively. The morphological, chemical and structural characterization of the as-synthesized products was carried out using scanning electron microscopy (SEM), Raman and fourier transform infrared (FTIR) spectroscopy. Field emission (FE) studies of PGO, PRGO, PGNR emitters were performed at the base pressure of 1×10-8 mbar in planar `diode' configuration. Onset and threshold field values corresponding to emission current densities of 1 and 100 μA/cm2 are observed to be 1.5 and 2.3V/μm for PGO, 1.4 and 2.2 V/μm for PRGO and lowest for PGNR as 0.9 and 1.2V/μm, respectively. The maximum emission current density of 2.5 mA/cm2 drawn for PGO at the applied electric field of 3.2V/μm, 1.2 mA/cm2 at 3.6V/μm from the PRGO and 8 mA/cm2 at the field of 2.2 V/μm from the PGNR emitters. An emission current versus time (I-t) plot shows stable emission behavior for the preset current values.
机译：单体吡咯已分别在氧化石墨烯（GO），还原氧化石墨烯（rGO）和石墨烯纳米带（GNR）的存在下通过化学途径进行聚合，以制备纳米复合材料，例如聚吡咯-GO（PGO），PPy-rGO（PRGO）， PPy-GNR（PGNR）。使用扫描电子显微镜（SEM），拉曼光谱和傅立叶变换红外（FTIR）光谱对合成产物进行形态，化学和结构表征。 PGO，PRGO，PGNR发射器的场发射（FE）研究是在1×10-8 mbar的基本压力下以平面“二极管”配置进行的。观察到与1和100μA/ cm2的发射电流密度相对应的开始和阈值场值对于PGO为1.5和2.3V /μm，对于PRGO为1.4和2.2 V /μm，对于PGNR最低为0.9和1.2V /μm，分别。在施加的3.2V /μm电场下，PGO的最大发射电流密度为2.5 mA / cm2;从PRGO引出的3.6V /μm处的最大发射电流密度为1.2 mA / cm2;在2.2V /μm的电场下，其最大发射电流密度为8 mA / cm2 PGNR发射器。发射电流与时间（I-t）的关系图显示了预设电流值的稳定发射行为。

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