Plasmonic enhancement of exciton and trion photoluminescence in 2D MoS2 decorated with Au nanorods: Impact of nonspherical shape

MoS2–Ag Nanocomposite-Based SERS Substrates with an Ultralow Detection Limit

“…Moreover, the process of electron–hole generation in the semiconductor is proportional to the intensity of local excitation light. Thus, local field enhancement around the Ag NPs due to the LSPR effect results in the generation of plasmonic hot electrons in Ag NPs vicinity and MoS 2 , which in turn increases the charge carrier concentration in semiconductor MoS 2 . , SERS signal intensity improves many times in the presence of Ag NPs, which is attributed to their LSPR effect. LSPR produces a highly localized enhanced electric field on the surface of metal NPs.…”

Exciton and Trion at the Perimeter and Grain Boundary of CVD-Grown Monolayer MoS2: Strain Effects Influencing Application in Nano-Optoelectronics

“…Nanolayers of transition metal dichalcogenides (TMDCs) are interesting as two-dimensional (2D) materials for novel nano-optoelectronics, with molybdenum disulfide (MoS 2 ) being one of the most studied. At the limit of the monolayer (1L), whose thickness is ∼0.7 nm, MoS 2 possesses a direct bandgap leading to an intense excitonic photoluminescence (PL) and an optical bandgap value ( E g ) of ∼1.88 eV (660 nm) at room temperature. − MoS 2 optical and photoelectrical properties are favorable for its application as an active nanoelement in red-light emitters − and visible-light detectors. − At the same time, the intensity of PL and photocurrent may be enhanced via the decoration with sensitizers such as semiconductor quantum dots, , plasmonic nanoparticles, − and other approaches . Also, the properties of 2D MoS 2 can be enhanced and tuned in a wide range by decreasing the lateral size of the flakes, approaching nanoflakes and 2D quantum dots. − …”

Synergizing plasmonic Au nanocages with 2D MoS2 nanosheets for significant enhancement in photocatalytic hydrogen evolution

“…As a famous plasmonic metal, various plasmonic Au nanostructures, such as Au nanorods, 26–29 nanoplates, 29,30 nanocubes, 29,31,32 nanoantennae, 30,33 and nanoparticles 16,34–36 have been reported to couple with MoS 2 nanosheets to investigate the plasmonic effect on the electronic and/or optical behaviors of MoS 2 . While the shape effect of plasmonic metal nanostructures on LSPR behaviors has become a hot topic, the LSPR wavelength, another pivotal parameter of plasmonic metal nanostructures, has received much less attention.…”

“…23 Although the explicit mechanism of charge transport between a plasmonic metal and semiconductor remains controversial, with the strong contribution from plasmonic metal nanostructures, photocatalytic efficiency over the semiconductor species can be drastically enhanced, indicating the positive inuence of the plasmonic metals in the photocatalysis process. 19,24,25 As a famous plasmonic metal, various plasmonic Au nanostructures, such as Au nanorods, [26][27][28][29] nanoplates, 29,30 nanocubes, 29,31,32 nanoantennae, 30,33 and nanoparticles 16,[34][35][36] have been reported to couple with MoS 2 nanosheets to investigate the plasmonic effect on the electronic and/or optical behaviors of MoS 2 . While the shape effect of plasmonic metal nanostructures on LSPR behaviors has become a hot topic, the LSPR wavelength, another pivotal parameter of plasmonic metal nanostructures, has received much less attention.…”