Chain-Folded Polymer Crystal Electronic Devices

PI将研究链状折叠聚合物晶体作为可能的电子设备。实验证明，聚合物单晶具有负阻特性，可用作有源器件。我们最近的理论3表明，这些器件的工作原理是隧道效应，并且有可能有潜在的实际器件应用。除了最初的测量之外，由于缺乏关于这些系统的进一步信息，在我们能够将这些晶体用于设备之前，必须获得一套完整的实验参数。这项工作将包括生长高质量的聚乙烯晶体，并测试其电流-电压(IV)特性的各种参数：晶体质量、晶体厚度、不同金属电极的选择以及温度相关性。其次，为了确定开关速度，我们希望使用自动化仪器通过时域光谱分析(脉冲法)对这些设备进行交流测量。这种方法的仪器将使用莫普西克在国家标准局首创的方法来建造，并将在介电测量中广泛使用。

The PI's will investigate chain-folded polymer crystals as possible electronic devices. It has been demonstrated experimentally that single crystals of polymers show negative resistance and hence can be used as active devices. Our recent theory 3 shows that the operating principle of these devices is tunneling and that there are potential practical device applications possible. Lacking further information on these systems beyond the original measurements, it is mandatory to obtain a complete set of experimental parameters, before we will be able to use these crystals in devices. The work will consist of growing high-quality polyethylene crystals and testing their current-voltage (IV) characteristics for a variety of parameters: quality of the crystals, thickness of the crystal, choice of different metal electrodes, and temperature dependence. Secondly, in order to establish switching speeds, we want to make ac measurements on these devices by time domain spectroscopy (pulse method) using automated instrumentation. The instrumentation for this method will be built, using the methods pioneered at the National Bureau of Standards by Mopsik, and will be useful for general use in dielectric measurements.