Hydrogen-Incorporated TiS₂ Ultrathin Nanosheets with Ultrahigh Conductivity for Stamp-Transferrable Electrodes

Abstract

As a conceptually new class of two-dimensional (2D) materials, the ultrathin nanosheets as inorganic graphene analogues (IGAs) play an increasingly vital role in the new-generation electronics. However, the relatively low electrical conductivity of inorganic ultrathin nanosheets in current stage significantly hampered their conducting electrode applications in constructing nanodevices. We developed the unprecedentedly high electrical conductivity in inorganic ultrathin nanosheets. The hydric titanium disulfide (HTS) ultrathin nanosheets, as a new IGAs, exhibit the exclusively high electrical conductivity of 6.76 × 10(4) S/m at room temperature, which is superior to indium tin oxide (1.9 × 10(4) S/m), recording the best value in the solution assembled 2D thin films of both graphene (5.5 × 10(4) S/m) and inorganic graphene analogues (5.0 × 10(2) S/m). The modified hydrogen on S-Ti-S layers contributes additional electrons to the TiS2 layered frameworks, rendering the controllable electrical conductivity as well as the electron concentrations. Together with synergic advantages of the excellent mechanical flexibility, high stability, and stamp-transferrable properties, the HTS thin films show promising capability for being the next generation conducting electrode material in the nanodevice fields.

New materials for tunable plasmonic colloidal nanocrystals

“…161 Recently, hydrogenincorporated TiS 2 nanosheets with ultrahigh conductivity were reported. 163 NCs of such materials might exhibit plasmonic properties. Since colloidally stable few-layer nanodisks of some TMDCs can now be synthesized by chemical approaches, 164 it will be certainly interesting to attempt further manipulation of these NCs to eventually assess the presence of LSPRs.…”

MoSe2 porous microspheres comprising monolayer flakes with high electrocatalytic activity

“…Many facile and cost-effective methods have been developed to prepare these 2D materials in order to fully explore their properties [12][13][14]. Among the TMC compounds, MX 2 (M = W, Mo; X = S, Se) crystallize in a layered structure with strong in-plane covalent bonding and weak interlayer van der Waals interactions [5][6][7][8][9][10][11][12][13][14][15], and have drawn intense attention in energy storage [16,17], catalysis [18][19][20][21][22], sensing [23], and phototransistors [24]. These applications are directly governed by their interfacial processes.…”

Geometrical structures, and electronic and transport properties of a novel two-dimensional β-GaS transparent conductor

“…Various coverages of H over the top layer of S on the 2D β-GaS sheet were used to simulate different H concentrations. The carrier transport properties were calculated using the BoltzTrap code [21,22]. A relatively dense mesh of k points with a maximum density of 7.3 × 10 -3 Å -1 was applied for simulations of the transport properties.…”