Bis-Ferrocene Molecular QCA Wire: Ab Initio Simulations of Fabrication Driven Fault Tolerance
Bis-Ferrocene Molecular QCA Wire: Ab Initio Simulations of Fabrication Driven Fault Tolerance
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DOI：
10.1109/tnano.2013.2261824
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发表时间：
2013-07
影响因子：
2.4
通讯作者：
A. Pulimeno;M. Graziano;A. Sanginario;V. Cauda;D. Demarchi;G. Piccinini
中科院分区：
文献类型：
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作者：
A. Pulimeno;M. Graziano;A. Sanginario;V. Cauda;D. Demarchi;G. Piccinini
分子量子点细胞自动机(MQCA)是最有前途的新兴技术之一，它具有预期的理论工作频率(THz)、高的器件密度和非低温工作温度。由于MQCA单元的体积较小，基于一两个分子，器件的原型制作甚至简单的电路制作都受到工艺过程控制的限制。在这篇论文中，我们分析了用临时合成的双二茂铁分子构建的分子QCA线可能存在的制造缺陷。我们评估了一个真实的QCA器件的容错性，并评估了它在非理想条件下的性能，因为我们在实验中面临着制造上的关键问题。我们通过定义一种新的基于从头计算模拟和理论计算的MQCA技术中的故障分析方法来实现这些结果。所得结果给出了双二茂铁分子丝安全工作区的定量信息，并为改进最终实验装置的工艺流程提供了重要的反馈。
Molecular quantum dot cellular automata (MQCA) are among the most promising emerging technologies for the expected theoretical operating frequencies (THz), the high device densities, and the noncryogenic working temperature. Due to the small size of an MQCA cell, based on one or two molecules, the device prototyping and even a simple circuit fabrication are limited by the lack of control on the technological process. In this paper, we performed an analysis of the possible fabrication defects of a molecular QCA wire built with ad hoc synthesized bis-ferrocene molecules. We evaluated the fault tolerance of a real QCA device and assessed its performance in nonideal conditions due to the fabrication criticalities as we faced in our experiments. We achieved these results by defining a new methodology for the fault analysis in the MQCA technology, based both on ab initio simulations and theoretical computations. The obtained results give quantitative information on the safe operating area (SOA) of a bis-ferrocene molecular wire, and represented an important feedback to improve the technological process for the final experimental set-up.