Mechanical exfoliation and Raman spectra of ultrathin PbI2 single crystal
Mechanical exfoliation and Raman spectra of ultrathin PbI2 single crystal
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DOI：
10.1016/j.matlet.2016.01.034
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发表时间：
2016-04
影响因子：
3
通讯作者：
Peihua Wangyang;Hui Sun;Xing-hua Zhu;Dingyu Yang;Xiuying Gao
中科院分区：
文献类型：
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作者：
Peihua Wangyang;Hui Sun;Xing-hua Zhu;Dingyu Yang;Xiuying Gao
在本文中，我们报道了在石墨烯实现后，用机械剥落法成功制备超薄pbi2单晶。用x射线衍射、原子力显微镜和拉曼散射等方法研究了样品的性质。XRD谱分析表明，pbi2晶体为六方晶型，具有2H型晶体结构。得到了厚度约为10 nm的15层pbi2单晶。在532 nm的激光中可以观测到5个拉曼光谱峰，分别位于73,95,111,167和214 cm−1，而在676.4 nm和514.5 nm的激光中只能观测到4个拉曼光谱峰。超薄pbi2单晶的研究结果将激发对其基本性质和潜在应用的进一步理论计算和实验研究。
In this paper, we report the successful fabrication of ultrathin PbI2single crystal by mechanical exfoliation method after the realization of graphene. The properties of samples were investigated by X-ray diffraction, atomic force microscopy and Raman scattering. The XRD spectrum indicates that PbI2crystal has hexagonal crystalline pattern with 2H type crystal structure. The thickness around 10 nm about 15 layers of PbI2single crystal verified by AFM was obtained. Five Raman bands with peaks at 73, 95, 111, 167, and 214 cm−1are observed with 532 nm laser, while there are only four bands can be observed for laser 676.4 nm and 514.5 nm respectively. The results of ultrathin PbI2single crystal will stimulate further theoretical calculations and experimental investigation of their fundamental properties and potential applications.