Solution-phase epitaxial growth of noble metal nanostructures on dispersible single-layer molybdenum disulfide nanosheets

Abstract

Compared with the conventional deposition techniques used for the epitaxial growth of metallic structures on a bulk substrate, wet-chemical synthesis based on the dispersible template offers several advantages, including relatively low cost, high throughput, and the capability to prepare metal nanostructures with controllable size and morphology. Here we demonstrate that the solution-processable two-dimensional MoS(2) nanosheet can be used to direct the epitaxial growth of Pd, Pt and Ag nanostructures at ambient conditions. These nanostructures show the major (111) and (101) orientations on the MoS(2)(001) surface. Importantly, the Pt-MoS(2) hybrid nanomaterials exhibit much higher electrocatalytic activity towards the hydrogen evolution reaction compared with the commercial Pt catalysts with the same Pt loading. We believe that nanosheet-templated epitaxial growth of nanostructures via wet-chemical reaction is a promising strategy towards the facile and high-yield production of novel functional materials.

Two-dimensional assemblies from crystallizable homopolymers with charged termini

“…Although morphology "memory" is well-established for the growth of 2D semiconducting nanosheets through epitaxial growth, 30,31 reports involving soft matter are much less common. 13,29 Furthermore, to our knowledge, the use of different seeds from the same polymer to induce the formation of 2D platelets of different shape via seeded growth in solution is unprecedented.…”

Ultrathin platinum nanowires grown on single-layered nickel hydroxide with high hydrogen evolution activity

“…The increased adsorption ability guarantees heterogeneous nucleation and growth of Pt on the SL-Ni(OH) 2 nanosheets. (3) Compared with multilayered systems, SL-Ni(OH) 2 nanosheets, which possess higher defect tolerance ability, could allow for horizontal growth of anisotropic nanostructures through slight adjustment of their crystal structure 51 . Electrocatalytic performance of Pt NWs/SL-Ni(OH) 2 .…”

Production of monolayer-rich gold-decorated 2H–WS2 nanosheets by defect engineering

“…Such TMD-Au hybrids are interesting for a number of applications ranging from rechargeable batteries, 27 to biosensing, 29,30 optoelectronics, [31][32][33] and catalysis. [34][35][36] Finally, as in any material, defects largely control the properties of the 2D nanosheets. 37 Depending on the type of defect, they are not necessarily detrimental, but may be beneficial for a given application.…”