Size and Shape’s Effects on the High-Pressure Behavior of WS2 Nanomaterials |
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| Authors: | Lei Yue Dan Xu Ziyu Wei Tingting Zhao Tao Lin Reshef Tenne Alla Zak Quanjun Li Bingbing Liu |
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| Affiliation: | 1.State Key Laboratory of Superhard Materials, Jilin University, Changchun 130012, China; (L.Y.); (D.X.); (Z.W.); (T.Z.); (T.L.); (B.L.);2.Department of Materials and Interfaces, Weizmann Institute, Rehovot 76100, Israel;3.Faculty of Sciences, HIT—Holon Institute of Technology, 52 Golomb St., Holon 5810201, Israel; |
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| Abstract: | ![]()
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 WS2 nanotubes (NT-WS2) and fullerene-like nanoparticles (IF-WS2) by in situ high-pressure X-ray diffraction (XRD) and Raman spectroscopy. It was found that the bulk modulus of NT-WS2 is 81.7 GPa, which is approximately twice as large as that of IF-WS2 (46.3 GPa). This might be attributed to the fact that IF-WS2 with larger d-spacing along the c-axis and higher defect density are more compressible under isotropic pressure than NT-WS2. Thus, the slender NT-WS2 possess a more stable crystal structure than the IF-WS2. Our findings reveal that the effects of morphology and size play crucial roles in determining the high-pressure properties of WS2 nanoparticles, and provide significant insight into the relationship between structure and properties. |
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| Keywords: | high pressure nanomaterials WS2 crystal structure |
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