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Thickness-Dependence Electrical Characterization of the One-Dimensional van der Waals TaSe3 Crystal.


ABSTRACT: Needle-like single crystalline wires of TaSe3 were massively synthesized using the chemical vapor transport method. Since the wedged-shaped single TaSe3 molecular chains were stacked along the b-axis by weak van der Waals interactions, a few layers of TaSe3 flakes could be easily isolated using a typical mechanical exfoliation method. The exfoliated TaSe3 flakes had an anisotropic planar structure, and the number of layers could be controlled by a repeated peeling process until a monolayer of TaSe3 nanoribbon was obtained. Through atomic force and scanning Kelvin probe microscope analyses, it was found that the variation in the work function with the thickness of the TaSe3 flakes was due to the interlayer screening effect. We believe that our results will not only help to add a novel quasi-1D block for nanoelectronics devices based on 2D van der Waals heterostructures, but also provide crucial information for designing proper contacts in device architecture.

SUBMITTER: Kim BJ 

PROVIDER: S-EPMC6695938 | biostudies-literature | 2019 Aug

REPOSITORIES: biostudies-literature

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Thickness-Dependence Electrical Characterization of the One-Dimensional van der Waals TaSe<sub>3</sub> Crystal.

Kim Bum Jun BJ   Jeong Byung Joo BJ   Oh Seungbae S   Chae Sudong S   Choi Kyung Hwan KH   Nasir Tuqeer T   Lee Sang Hoon SH   Lim Hyung Kyu HK   Choi Ik Jun IJ   Hong Min-Ki MK   Yu Hak Ki HK   Lee Jae-Hyun JH   Choi Jae-Young JY  

Materials (Basel, Switzerland) 20190802 15


Needle-like single crystalline wires of TaSe<sub>3</sub> were massively synthesized using the chemical vapor transport method. Since the wedged-shaped single TaSe<sub>3</sub> molecular chains were stacked along the b-axis by weak van der Waals interactions, a few layers of TaSe<sub>3</sub> flakes could be easily isolated using a typical mechanical exfoliation method. The exfoliated TaSe<sub>3</sub> flakes had an anisotropic planar structure, and the number of layers could be controlled by a repe  ...[more]

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