One-dimensional van der Waals stacked p-type crystal Ta₂Pt₃Se₈ for nanoscale electronics

Abstract

Recently, ternary transition metal chalcogenide Ta2X3Se8 (X = Pd or Pt) has attracted great interest as a class of emerging one-dimensional (1D) van der Waals (vdW) materials. In particular,Ta2Pd3Se8 has...

One-Dimensional Atomic Chains for Ultimate-Scaled Electronics

“…Taking 1D MX 3 (M = Ti, Zr; X = S, Se, Te) as an example, the cleavage energy between chains is 0.2–0.7 J m –2 , which is much lower than that along the chains of 2.9–3.1 J m –2 . , In this regard, it is practical to identify the appropriate experimental parameters for the mechanical or chemical exfoliations of individual ACs from their bulk counterparts. Following this idea, mechanical or liquid-phase exfoliations of Te, TiS 3 (Figure a), Nb 2 Se 9 , Ta 2 Ni 3 Se 8 , Ta 2 Pt 3 Se 8 , and Ta 2 Pd 3 Se 8 (Figure b) few-chain ACs were realized with diameters down to ∼1 nm. These exfoliated 1D ACs exhibit good electrical switching performance and thickness-dependent properties, e.g., bandgap opening and indirect-to-direct bandgap transition.…”

“…Notably, the exfoliated 1D Ta 2 Ni 3 Se 8 ACs demonstrated the ambipolar semiconducting behavior, 36 whereas the Ta 2 Pd 3 Se 8 and Ta 2 Pt 3 Se 8 ACs were found to exhibit n-type and p-type semiconducting characteristics, respectively. 49,71 It is unusual to observe different transport polarities in one isostructural material system, which can be conveniently integrated into complementary electronics (Figure 3c). 72 Also, the ambipolar semiconducting Ta 2 Ni 3 Se 8 ACs, featured with the differential transconductance under positive/negative gate bias, can enable the higher data processing capability in a single device, thus significantly simplifying the circuit design.…”

Organic Dispersion of Mo3Se3– Single-Chain Atomic Crystals Using Surface Modification Methods

“…One-dimensional (1D) molecular nanowires, composed of single-chain atomic crystals (SCACs) with diameters smaller than 5 nm ( e . g ., LiMo 3 Se 3 , − Mo 6 S 9– x I x , − Te, Nb 2 Se 9 , − V 2 Se 9 , , Nb 2 Pd 3 Se 8 , Ta 2 Ni 3 Se 8 , , and MoI 3 ), are currently of interest due to their high mechanical strengths, electrical properties, large specific areas, and 1D quantum confinement effects. Carbon nanotubes have limitations as 1D materials due to challenges with controlling their size and number of walls, as well as their nonuniform physical properties due to chirality .…”

Liquid Precursor-Assisted Chemical Vapor Deposition of One-Dimensional van der Waals Material Nb2Se9: Tunable Growth for Room-Temperature Gas Sensors

“…12−16 So far, fabrication methods for Nb 2 Se 9 as a nanoscale device have involved a single crystal being synthesized by a solid-state reaction, after which mechanical or chemical exfoliation has been applied. [8][9][10][11]17 However, in the case of mechanical exfoliation, it is difficult to obtain regular and uniform peeling of the material. In addition, chemical exfoliation can reduce the sensitivity of sensors or catalysts based on surface reactions (adsorption and desorption) caused by surface residues left by the dispersant.…”

“…Such 1D materials have a crystal structure with chalcogenide elements (S, Se, Te/X) or halogen elements (I, Br/Y) linearly arranged transition metals (M, N). In particular, various synthesis and physical property studies are being conducted on groups such as M 6 X 3 Y 6 , M 2 X 3 , M 2 X 9 , and M 2 N 3 X 8 . − …”