Yue Lei, Xu Dan, Wei Ziyu, Zhao Tingting, Lin Tao, Tenne Reshef, Zak Alla, Li Quanjun, Liu Bingbing
State Key Laboratory of Superhard Materials, Jilin University, Changchun 130012, China.
Department of Materials and Interfaces, Weizmann Institute, Rehovot 76100, Israel.
Materials (Basel). 2022 Apr 12;15(8):2838. doi: 10.3390/ma15082838.
Exploring the behavior of nanocrystals with varying shapes and sizes under high pressure is crucial to understanding the relationship between the morphology and properties of nanomaterials. In this study, we investigated the compression behaviors of WS nanotubes (NT-WS) and fullerene-like nanoparticles (IF-WS) by in situ high-pressure X-ray diffraction (XRD) and Raman spectroscopy. It was found that the bulk modulus of NT-WS is 81.7 GPa, which is approximately twice as large as that of IF-WS (46.3 GPa). This might be attributed to the fact that IF-WS with larger d-spacing along the c-axis and higher defect density are more compressible under isotropic pressure than NT-WS. Thus, the slender NT-WS possess a more stable crystal structure than the IF-WS. Our findings reveal that the effects of morphology and size play crucial roles in determining the high-pressure properties of WS nanoparticles, and provide significant insight into the relationship between structure and properties.
探索不同形状和尺寸的纳米晶体在高压下的行为对于理解纳米材料的形态与性能之间的关系至关重要。在本研究中，我们通过原位高压X射线衍射（XRD）和拉曼光谱研究了WS纳米管（NT-WS）和类富勒烯纳米颗粒（IF-WS）的压缩行为。结果发现，NT-WS的体积模量为81.7 GPa，约为IF-WS（46.3 GPa）的两倍。这可能归因于沿c轴具有更大d间距和更高缺陷密度的IF-WS在各向同性压力下比NT-WS更易压缩。因此，细长的NT-WS比IF-WS具有更稳定的晶体结构。我们的研究结果表明，形态和尺寸效应在决定WS纳米颗粒的高压性能方面起着关键作用，并为结构与性能之间的关系提供了重要见解。
