environmentally stable anisotropic transition l trichalcogenide material tas3 is available at 2dsemiconductors usa. tas3 is a layered material like mos2 and other layered systems, except that it exhibits highly anisotropic crystalline structure and material properties (like res2 or tis3). the presence of the crystalline anisotropy results in direction dependent properties like thermal conductivity, electronic mobility, and excitonic binding energies. tas3 undergoes l to semiconductor transition from bulk to monolayers, and it has been shown that tas3 has an excellent electronic response, anisotropic conductivity, sensing potential, and cdws. in a typical order, a large number of layered needle like sheets are contained in a capsule sealed under argon environment. crystals have been characterized by tem, xps, sims, and xrd and possess perfect 1:3 stoichiometry and defect density less than 1 defects / 10,000 unit cells.

　　crystal size ~ 1 cm

　　material characteristics

　　charge-density wave material

　　depending on the thickness, it is narrow bａnd gap semiconductor or llic

　　high carrier mobility material

　　2d anisotropic material

　　2d catalytic material

　　related literature

　　tas3 nanofibers: layered trichalcogenide for high-performance electronic and sensing devices.; acs nano. 2018 jan 23;12(1):464-473 [link]

　　quantization of states and strain-induced transformation of charge-density waves in the quasi-one-dimensional conductor tas3

　　phys. rev. b 94, 115140 (2016)

　　charge-density-wave transport in orthorhombic tas3. i. nonlinear conductivity phys. rev. b 26, 5773 (1982)