Surmounting the interband threshold limit by the hot electron excitation of multi-metallic plasmonic AgAuCu NPs for UV photodetector application

Lin, Shusen; Kulkarni, Rakesh; Mandavkar, Rutuja; Habib, Md Ahasan; Burse, Shalmali; Kunwar, Sundar; Lee, Jihoon

doi:10.1039/d2ce00367h

Cited by 4 publications

(2 citation statements)

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“…Ag and Au are widely adapted plasmonic materials along with their superior LSPR resonance intensity, stability, and wide wavelength range in which most of Raman emission takes place [ 9 , 11 , 13 ]. Various Ag and Au-based plasmonic platforms have been widely explored for SERS enhancement such as Ag nanorods, porous AgAu NPs, Ag/GQD, Au NPs/MXene, and so forth [ 8 , 14 , 15 , 16 , 17 , 18 , 19 , 20 ]. The bimetallic hybrid NP configuration can provide extended options to alert the size- and shape-dependent LSPR [ 8 , 19 , 20 ].…”

Section: Introductionmentioning

confidence: 99%

“…Various Ag and Au-based plasmonic platforms have been widely explored for SERS enhancement such as Ag nanorods, porous AgAu NPs, Ag/GQD, Au NPs/MXene, and so forth [ 8 , 14 , 15 , 16 , 17 , 18 , 19 , 20 ]. The bimetallic hybrid NP configuration can provide extended options to alert the size- and shape-dependent LSPR [ 8 , 19 , 20 ]. At the same time, metallic Pd NP can be a promising plasmon-enhanced sensing platform due to superior NIR extinction and chemical stability [ 8 , 21 ].…”

Section: Introductionmentioning

confidence: 99%

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MoS2 Nanoplatelets on Hybrid Core-Shell (HyCoS) AuPd NPs for Hybrid SERS Platform for Detection of R6G

et al. 2023

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In this work, a novel hybrid SERS platform incorporating hybrid core-shell (HyCoS) AuPd nanoparticles (NPs) and MoS2 nanoplatelets has been successfully demonstrated for strong surface-enhanced Raman spectroscopy (SERS) enhancement of Rhodamine 6G (R6G). A significantly improved SERS signal of R6G is observed on the hybrid SERS platform by adapting both electromagnetic mechanism (EM) and chemical mechanism (CM) in a single platform. The EM enhancement originates from the unique plasmonic HyCoS AuPd NP template fabricated by the modified droplet epitaxy, which exhibits strong plasmon excitation of hotspots at the nanogaps of metallic NPs and abundant generation of electric fields by localized surface plasmon resonance (LSPR). Superior LSPR results from the coupling of distinctive AuPd core-shell NP and high-density background Au NPs. The CM enhancement is associated with the charge transfer from the MoS2 nanoplatelets to the R6G. The direct contact via mixing approach with optimal mixing ratio can effectively facilitate the charges transfer to the HOMO and LUMO of R6G, leading to the orders of Raman signal amplification. The enhancement factor (EF) for the proposed hybrid platform reaches ~1010 for R6G on the hybrid SERS platform.

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