Large elastic recovery of zinc dicyanoaurate
Large elastic recovery of zinc dicyanoaurate
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DOI：
10.1063/1.4990549
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发表时间：
2017-02
期刊：
影响因子：
6.1
通讯作者：
C. Coates;Matthew R. Ryder;Joshua A. Hill;Jin‐Chong Tan;A. Goodwin
中科院分区：
文献类型：
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作者：
C. Coates;Matthew R. Ryder;Joshua A. Hill;Jin‐Chong Tan;A. Goodwin
我们报道了负压缩性材料双氰酸锌的单晶纳米压痕研究。该材料表现出特别强的弹性恢复，我们将其归因于超分子螺旋的存在，超分子螺旋具有原子尺度弹簧的功能-在压缩应力期间存储机械能并抑制塑性变形。我们的结果与Cheng和Cheng [apple]注意到的关系一致。理论物理。leet . 73, 614(1998)]弹性恢复与材料硬度与杨氏模量之比之间的关系。通过与其他含有螺旋图案的框架材料的比较，我们建议螺旋作为一种有吸引力的设计元素，用于赋予功能材料抗塑性变形的能力。
We report a single-crystal nanoindentation study of the negative compressibility material zinc(II) dicyanoaurate. The material exhibits a particularly strong elastic recovery, which we attribute to the existence of supramolecular helices that function as atomic-scale springs—storing mechanical energy during compressive stress and inhibiting plastic deformation. Our results are consistent with the relationship noted by Cheng and Cheng [Appl. Phys. Lett. 73, 614 (1998)] between elastic recovery and the ratio of material hardness to Young’s modulus. Drawing on comparisons with other framework materials containing helical motifs, we suggest helices as an attractive design element for imparting resistance to plastic deformation in functional materials.