Photoinduced edge-specific nanoparticle decoration of two-dimensional tungsten diselenide nanoribbons

Abstract

Metallic nanoparticles are widely explored for boosting light-matter coupling, optoelectronic response, and improving photocatalytic performance of two-dimensional (2D) materials. However, the target area is restricted to either top or bottom of the 2D flakes. Here, we introduce an approach for edge-specific nanoparticle decoration via light-assisted reduction of silver ions and merging of silver seeds. We observe arrays of the self-limited in size silver nanoparticles along tungsten diselenide WSe2 nanoribbon edges. The density of nanoparticles is tunable by adjusting the laser fluence. Scanning electron microscopy, atomic force microscopy, and Raman spectroscopy are used to investigate the size, distribution, and photo-response of the deposited plasmonic nanoparticles on the quasi-one-dimensional nanoribbons. We report an on-surface synthesis path for creating mixed-dimensional heterostructures and heterojunctions with potential applications in opto-electronics, plasmonics, and catalysis, offering improved light matter coupling, optoelectronics response, and photocatalytic performance of 2D materials.

Multi-Layer Palladium Diselenide as a Contact Material for Two-Dimensional Tungsten Diselenide Field-Effect Transistors

“…In this regard, ambipolar has garnered keen interest in the scientific community due to its potential applications towards complementary metal–oxide–semiconductor (CMOS) technology, solar cells, water splitting, light emitting, and gas sensing [ 11 , 12 , 13 , 14 , 15 ]. Moreover, patterned nanoribbons of have been shown to offer high electrical performance and the possibility to be coupled with metallic nanoparticles, which offers exciting possibilities in optoelectronic applications and tunable catalysis [ 16 , 17 ]. Like other 2D materials, the properties of can be tuned via thickness [ 18 ], plasma treatment [ 19 ], strain [ 20 ], and choice of contacts [ 21 , 22 ].…”