Surface-Enhanced Raman Scattering Monitoring of Oxidation States in Defect-Engineered Two-Dimensional Transition Metal Dichalcogenides

2020 ◽  
Vol 11 (19) ◽  
pp. 7981-7987
Author(s):  
Xiangyu Hou ◽  
Qian Lin ◽  
Yunjia Wei ◽  
Qi Hao ◽  
Zhenhua Ni ◽  
...  
Keyword(s):  
Transition Metal ◽  
Raman Scattering ◽  
Transition Metal Dichalcogenides ◽  
Surface Enhanced Raman Scattering ◽  
Oxidation States ◽  
Two Dimensional ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Metal Dichalcogenides ◽  
Enhanced Raman Scattering

Origin of layer-dependent SERS tunability in 2D transition metal dichalcogenides

2021 ◽  
Author(s):  
Mingze Li ◽  
Yimeng Gao ◽  
Xingce Fan ◽  
Yunjia Wei ◽  
Qi Hao ◽  
...  
Keyword(s):  
Transition Metal ◽  
Noble Metals ◽  
Transition Metal Dichalcogenides ◽  
Two Dimensional ◽  
2D Semiconductors ◽  
Surface Enhanced ◽  
The Matrix ◽  
Surface Enhanced Raman ◽  
Metal Dichalcogenides ◽  
Enhanced Raman Scattering

Two-dimensional (2D) semiconductors are expected to replace noble metals to become the matrix materials of next generation of commercial surface-enhanced Raman scattering (SERS) chips. Herein, we systematically studied the influence...

Synthesis of Large-Area MoSe2 Monolayer Film for Surface-Enhanced Raman Scattering Analysis

NANO ◽  
2021 ◽  
pp. 2150076
Author(s):  
Kongjia Zheng ◽  
Jianjun Deng ◽  
Zhonghao Zhou ◽  
Jinglong Chen ◽  
Zhiyong Wang ◽  
...  
Keyword(s):  
Transition Metal ◽  
Raman Scattering ◽  
Surface Enhanced Raman Scattering ◽  
Chemical Vapor Deposition Method ◽  
Enhancement Effect ◽  
Transition Metal Dichalcogenide ◽  
Two Dimensional ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering

Ultrathin two-dimensional transition metal dichalcogenides represent a promising new class of materials with surface-enhanced Raman scattering (SERS) activities. Previous work mainly focused on the SERS effects of transition metal dichalcogenide crystals with sizes of micrometer scale. The enhancement effect is usually nonuniform on the SERS substrates. In this paper, we report a chemical vapor deposition method for the preparation of centimeter-scale MoSe2 films with uniform and high SERS activity. The molybdenum precursors are supplied in a “face-to-face” manner from a silica gel plate to the growth substrate, which guarantees uniform nucleation and growth of the monolayer MoSe2. We demonstrate that the monolayer MoSe2 film has strong SERS effect, which can be attributed to charge transfer between MoSe2 and the probe molecules. The detection limit of Rhodamine B on monolayer MoSe2 is determined to be 10[Formula: see text][Formula: see text]mol/L, and the Raman enhancement factor is estimated to be [Formula: see text]. Due to its atomic uniformity and chemical stability, the MoSe2 film can serve as an ideal two-dimensional SERS material for detection of various molecules.

scholarly journals Development of Effectual Substrates for SERS by Nanostructures-on flexible surfaces

2021 ◽  
Vol 2114 (1) ◽  
pp. 012084
Author(s):  
Hammad R. Humud ◽  
Fatimah Jumaah Moaen
Keyword(s):  
Raman Scattering ◽  
Ag Nanoparticles ◽  
Surface Enhanced Raman Scattering ◽  
Wave Number ◽  
Plasmonic Nanostructures ◽  
Sers Substrate ◽  
Two Dimensional ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering

Abstract The current study examines recent advancements in surface-enhanced Raman scattering (SERS), a technique that employs flexible surfaces as an active substrate, this surfaces consist from two-dimensional thermo-plasmonic grating. With 53 nm Au layer (was deposited on the 2D grating structure of the PDMS by the PVD method). The explosive wire technique was used to preparing Ag nanoparticles that were used for the purpose of SERS. The effect of the plasmonic nanostructures on the absorption spectra and Surface - Enhanced Raman Scattering (SERS) activities was examined. Rhodamine 6G dye was used as a probe molecule. X-Ray diffraction (XRD) was used to examine the structural characteristics of the nanoparticles. The morphology was assessed using Field Emission Scanning Electron Microscopy(FESEM). A twin beam UV-Vis Spectrophotometer was used to measure the absorption of the combined Rh6G dye (concentration 1×10“–6M) with the nanostructures. a Sunshine Raman microscope system and a 50mm objective lens, used for investigating the Raman spectra of the Rh6G combined with nanostructures. The results showed that the enhancement factor (EF) for SERS of R6G (1×M) reached to (2.2×10 3) When using Ag nanoparticles and (0.08 × 103) when R6G deposited directly on the flexible substrates without nanostructures at the wave number (1650 cm−1), we produced a recyclable, homogeneous, and highly sensitive SERS substrate with dependable reproducibility. For the SERS substrate, a surface made up of two-dimensional (2D) flexible grating substrates was chosen to provide multiple modalities in electrical and medicinal applications.

Surface-enhanced Raman scattering from metal and transition metal nano-caped arrays

2018 ◽  
Vol 115 ◽  
pp. 59-66 ◽  
Author(s):  
Huanhuan Sun ◽  
Renxian Gao ◽  
Aonan Zhu ◽  
Zhong Hua ◽  
Lei Chen ◽  
...  
Keyword(s):  
Transition Metal ◽  
Raman Scattering ◽  
Surface Enhanced Raman Scattering ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering
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