Biological-Templating of a Segregating Binary Alloy for Nanowire-Like Phase-Change Materials and Memory
Biological-Templating of a Segregating Binary Alloy for Nanowire-Like Phase-Change Materials and Memory
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DOI：
10.1021/acsanm.8b01508
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发表时间：
2018-12-01
影响因子：
5.9
通讯作者：
Belcher, Angela M.
中科院分区：
文献类型：
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作者：
Loke, Desmond K.;Clausen, Griffin J.;Belcher, Angela M.
实现更快计算机的最佳策略之一是减轻硅基和磁基存储器之间传输和存储信息所产生的毫秒级时间延迟。偏析二元合金（SBA）型相变材料（PCM），例如锑化镓基系统，可以通过使用单个存储器结构在10 ns时间尺度上存储信息;然而，这些材料受到高能量消耗的阻碍，并且在620 K附近发生元素偏析。纳米线类相变材料具有低能耗的特点，但通常在720 K以上采用气-液-固方法合成，这会导致SBA基相变材料的不可逆腐蚀。在这里，我们使用模板驱动的成核作用，利用M13噬菌体表面的静电结合特异性，控制SBA型锗锡氧化物系统的形态，组成和功能。实现了具有可控和可靠的相变特征的线状PCM，能够实现数十纳秒的开关时间。这种方法解决了一些关键的材料组成和结构的限制，目前减少了通用存储器系统中的PCM的效用。
One of the best strategies for achieving faster computers is to mitigate the millisecond-order time delays arising from the transfer and storage of information between silicon-and magnetic-based memories. Segregating-binary alloy (SBA)-type phase-change materials (PCMs), such as gallium antimonide-based systems, can store information on 10 ns time scales by using a single memory structure; however, these materials are hindered by the high consumption of energies and undergo elemental segregation around 620 K. Nanowire-like PCMs can achieve low-energy consumption but are often synthesized by vapor-liquid-solid methods above 720 K, which would cause irreversible corruption of SBA-based PCMs. Here we control the morphology, composition, and functionality of SBA-type germanium tin oxide systems using template-driven nucleation that leverages the electrostatic-binding specificity of the M13 bacteriophage surface. A wirelike PCM was achieved, with controllable and reliable phase-changing signatures, capable of tens of nanoseconds switching times. This approach addresses some of the critical material compositional and structural constraints that currently diminish the utility of PCMs in universal memory systems.