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Zhou, Jun; Zhang, Guitao; Wang, Wenhui; Chen, Qian; Zhao, Weiwei; Liu, Hongwei; Zhao, Bei; Ni, Zhenhua; Lu, Junpeng
Nature communications, 02/2024, Letnik: 15, Številka: 1Journal Article
Multiple structural phases of tellurium (Te) have opened up various opportunities for the development of two-dimensional (2D) electronics and optoelectronics. However, the phase-engineered synthesis of 2D Te at the atomic level remains a substantial challenge. Herein, we design an atomic cluster density and interface-guided multiple control strategy for phase- and thickness-controlled synthesis of α-Te nanosheets and β-Te nanoribbons (from monolayer to tens of μm) on WS substrates. As the thickness decreases, the α-Te nanosheets exhibit a transition from metallic to n-type semiconducting properties. On the other hand, the β-Te nanoribbons remain p-type semiconductors with an ON-state current density (I ) up to ~ 1527 μA μm and a mobility as high as ~ 690.7 cm V s at room temperature. Both Te phases exhibit good air stability after several months. Furthermore, short-channel (down to 46 nm) β-Te nanoribbon transistors exhibit remarkable electrical properties (I = ~ 1270 μA μm and ON-state resistance down to 0.63 kΩ μm) at V = 1 V.
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