Cyclic Solid-State Multiple Phase Changes with Tuned Photoemission in a Gold Thiolate Coordination Polymer
Cyclic Solid-State Multiple Phase Changes with Tuned Photoemission in a Gold Thiolate Coordination Polymer
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DOI：
10.1002/anie.202117261
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发表时间：
2022-02-16
影响因子：
16.6
通讯作者：
Demessence, Aude
中科院分区：
文献类型：
--
作者：
Veselska, Oleksandra;Vaidya, Shefali;Demessence, Aude
在过去的几十年里，一种具有快速存取速度、高密度存储和非易失性的通用存储器的发现推动了对相变材料的研究。尽管无机硫系化合物用于相变随机存取存储器(PCRAM)具有很高的效率，但由于其脆性，它们仍然存在一些固有的缺陷，如相变温度高，相变的磁区大小难以控制。在这里，我们提出了一种金-硫代硫酸酯配位聚合物，它在温和加热(<；200℃)的情况下经历了两次连续的相变，从无定形到晶体2相。这些转变在手工软磨削时是可逆的。更重要的是，对于有效的光学读出，每个相表现出不同的光致发光特性。我们相信，Au-I-硫酸盐配位聚合物能够在软条件下发生可逆的相变，同时显示出清晰的光信号，这将为下一代PCRAM铺平道路。
The discovery of a universal memory that exhibits fast access speed, high-density storage, and nonvolatility has fuelled research into phase-change materials over the past decades. In spite of the efficiency of the inorganic chalcogenides for phase-change random access memory (PCRAM), they still have some inherent drawbacks, such as high temperature required for phase change and difficulty to control the domain size of the phase change, because of their brittleness. Here we present a Au-I-thiolate coordination polymer which undergoes two successive phase changes on application of mild heating (< 200 degrees C) from amorphous-to-crystallinel-to-crystalline2 phases. These transitions are reversible upon soft hand grinding. More importantly, each phase exhibits different photoluminescent properties for an efficient optical read-out. We believe that the ability of the Au-I-thiolate coordination polymer to have reversible phase changes under soft conditions and at the same time to display distinct optical signals, can pave the way for the next generation of PCRAM.