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.

Electrically Insulating Flexible Films with Quasi‐1D van der Waals Fillers as Efficient Electromagnetic Shields in the GHz and Sub‐THz Frequency Bands

“…Reported studies generally agree that it is a metal, with superconducting properties at low temperature, although some studies suggest that it is a semimetal. [ 15–18 ] The exact band and specifics of electron transport in bulk and exfoliated nanowires of TaSe 3 at various temperatures are still under intensive debate.…”

Rich Polymorphism of Layered NbS3

“…This is all the more interesting in view of the recent interest on MX 3 systems as single-or fewlayer systems with promising applications in electronic and optical devices as a result of their very anisotropic electronic structure. 2,29−32 In fact, nanoribbons of both NbS 3 -I and NbSe 3 , 33 nanofibers of TaS 3 , 34 microwires of TaSe 3 , 35,36 and single-layer TaSe 3 nanoribbons on SiO 2 /Si substrates 37 have already been reported.…”

A study on the bio-applicability of aqueous-dispersed van der Waals 1-D material Nb2Se9 using poloxamer

“…* email: jhlee7@skku.edu; hakkiyu@ajou.ac.kr; jy.choi@skku.edu to separate molecular chains that contain bonds other than the vdW variety and control their size and shape. However, in the case of the true 1D structure, it is possible to fabricate an atomic-scale inorganic nanowire without dangling bonds through mechanical separation [27][28][29] or chemical dispersion [29][30][31] . In our research group, we have synthesized a large number of true 1D materials and published the results of separating them into atomic units 20,31 .…”