Churchill Hugh O H, Salamo Gregory J, Yu Shui-Qing, Hironaka Takayuki, Hu Xian, Stacy Jeb, Shih Ishiang
Department of Physics, University of Arkansas, Fayetteville, AR, 72701, USA.
Institute for Nanoscience and Engineering, University of Arkansas, Fayetteville, AR, 72701, USA.
Nanoscale Res Lett. 2017 Aug 10;12(1):488. doi: 10.1186/s11671-017-2255-x.
We demonstrate that the atom chain structure of Te allows it to be exfoliated as ultra-thin flakes and nanowires. Atomic force microscopy of exfoliated Te shows that thicknesses of 1-2 nm and widths below 100 nm can be exfoliated with this method. The Raman modes of exfoliated Te match those of bulk Te, with a slight shift (4 cm) due to a hardening of the A and E modes. Polarized Raman spectroscopy is used to determine the crystal orientation of exfoliated Te flakes. These experiments establish exfoliation as a route to achieve nanoscale trigonal Te while also demonstrating the potential for fabrication of single atom chains of Te.
我们证明碲的原子链结构使其能够被剥离成超薄薄片和纳米线。对剥离后的碲进行原子力显微镜观察表明，通过这种方法可以剥离出厚度为1 - 2纳米且宽度低于100纳米的薄片。剥离后的碲的拉曼模式与块状碲的拉曼模式相匹配，由于A模式和E模式的硬化，存在轻微的频移（4厘米）。偏振拉曼光谱用于确定剥离后的碲薄片的晶体取向。这些实验确立了剥离作为获得纳米级三角碲的一种途径，同时也证明了制造碲单原子链的潜力。
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