MoS2-Based Substrates for Surface-Enhanced Raman Scattering: Fundamentals, Progress and Perspective

Yin, Yuan; Li, Chen; Yan, Yixin; Xiong, Wenhui; Ren, Jingke; Luo, Wen

doi:10.3390/coatings12030360

Cited by 15 publications

(5 citation statements)

References 98 publications

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“…A photoluminescence map was recorded from the same molybdenum sample area ( Figure 6 a). It shows significant quenching for multilayer ( Figure 6 b, blue spectrum) and bulk ( Figure 6 b, cyan spectrum) MoS 2 , not only due to the gradual transition from the monolayer direct bandgap to the bulk indirect bandgap [ 46 , 47 , 48 ], but also due to defects and terminations [ 49 , 50 , 51 ]. Monolayer MoS 2 shows a strong photoluminescence peak at 1.85–1.90 eV ( Figure 6 b red spectrum).…”

Section: Conformance Of Mono- or Few-layer Mos 2 W...mentioning

confidence: 99%

Towards Low-Temperature CVD Synthesis and Characterization of Mono- or Few-Layer Molybdenum Disulfide

Shendokar,

Aryeetey,

Hossen

et al. 2023

Micromachines

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Molybdenum disulfide (MoS2) transistors are a promising alternative for the semiconductor industry due to their large on/off current ratio (>1010), immunity to short-channel effects, and unique switching characteristics. MoS2 has drawn considerable interest due to its intriguing electrical, optical, sensing, and catalytic properties. Monolayer MoS2 is a semiconducting material with a direct band gap of ~1.9 eV, which can be tuned. Commercially, the aim of synthesizing a novel material is to grow high-quality samples over a large area and at a low cost. Although chemical vapor deposition (CVD) growth techniques are associated with a low-cost pathway and large-area material growth, a drawback concerns meeting the high crystalline quality required for nanoelectronic and optoelectronic applications. This research presents a lower-temperature CVD for the repeatable synthesis of large-size mono- or few-layer MoS2 using the direct vapor phase sulfurization of MoO3. The samples grown on Si/SiO2 substrates demonstrate a uniform single-crystalline quality in Raman spectroscopy, photoluminescence (PL), scanning electron microscopy (SEM), atomic force microscopy (AFM), X-ray photoelectron spectroscopy (XPS), and scanning transmission electron microscopy. These characterization techniques were targeted to confirm the uniform thickness, stoichiometry, and lattice spacing of the MoS2 layers. The MoS2 crystals were deposited over the entire surface of the sample substrate. With a detailed discussion of the CVD setup and an explanation of the process parameters that influence nucleation and growth, this work opens a new platform for the repeatable synthesis of highly crystalline mono- or few-layer MoS2 suitable for optoelectronic application.

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Section: Conformance Of Mono- or Few-layer Mos 2 W...mentioning

confidence: 99%

Towards Low-Temperature CVD Synthesis and Characterization of Mono- or Few-Layer Molybdenum Disulfide

Shendokar,

Aryeetey,

Hossen

et al. 2023

Micromachines

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“…Scientists discovered that when the analyzed samples are located in close proximity or adsorbed to a nanostructured metal (such as gold and silver), the incident light passing through the sample produces a massive intensification of Raman scattering, also known as SERS [ 128 , 129 , 130 ]. The controllable number and location of plasmonic nanoparticles on the SERS platform allows the high reproducibility and sensitivity of detection compared to the free-assemble nanoparticle [ 131 , 132 ].…”

Section: Nanotechnology In Food Monitoringmentioning

confidence: 99%

Recent Progress in Nanotechnology-Based Approaches for Food Monitoring

et al. 2022

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Throughout the food supply chain, including production, storage, and distribution, food can be contaminated by harmful chemicals and microorganisms, resulting in a severe threat to human health. In recent years, the rapid advancement and development of nanotechnology proposed revolutionary solutions to solve several problems in scientific and industrial areas, including food monitoring. Nanotechnology can be incorporated into chemical and biological sensors to improve analytical performance, such as response time, sensitivity, selectivity, reliability, and accuracy. Based on the characteristics of the contaminants and the detection methods, nanotechnology can be applied in different ways in order to improve conventional techniques. Nanomaterials such as nanoparticles, nanorods, nanosheets, nanocomposites, nanotubes, and nanowires provide various functions for the immobilization and labeling of contaminants in electrochemical and optical detection. This review summarizes the recent advances in nanotechnology for detecting chemical and biological contaminations in the food supply chain.

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“…For instance, Ag(NPs) can be deposited onto a nanostructured film directly from an Ag target, ensuring no oxidation or intermediate reactions occur during the deposition process. The presence of Ag(NPs) has been observed to induce a shift in the Fermi level of MoS 2 towards the valence band (VB) while simultaneously lowering the conduction band minimum (CBM), introducing impurity levels between the valence band maximum (VBM) and CBM, resulting in a p-type MoS 2 -Ag-doped material [ 10 , 19 ].…”

Section: Introductionmentioning

confidence: 99%

Silver Decoration of Vertically Aligned MoS2-MoOx Nanosheets: A Comprehensive XPS Investigation

Youssef,

Das,

Colomer

et al. 2024

Materials

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This study investigates the simultaneous decoration of vertically aligned molybdenum disulfide nanostructure (VA-MoS2) with Ag nanoparticles (NPs) and nitrogen functionalization. Nitrogen functionalization was achieved through physical vapor deposition (PVD) DC-magnetron sputtering using nitrogen as a reactive gas, aiming to induce p-type behavior in MoS2. The utilization of reactive sputtering resulted in the growth of three-dimensional silver structures on the surface of MoS2, promoting the formation of silver nanoparticles. A comprehensive characterization was conducted to assess surface modifications and analyze chemical and structural changes. X-ray photoelectron spectroscopy (XPS) showed the presence of silver on the MoS2 surface. Scanning electron microscopy (SEM) confirmed successful decoration with silver nanoparticles, showing that deposition time affects the size and distribution of the silver on the MoS2 surface.

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MoS2-Based Substrates for Surface-Enhanced Raman Scattering: Fundamentals, Progress and Perspective

Cited by 15 publications

References 98 publications

Towards Low-Temperature CVD Synthesis and Characterization of Mono- or Few-Layer Molybdenum Disulfide

Towards Low-Temperature CVD Synthesis and Characterization of Mono- or Few-Layer Molybdenum Disulfide

Recent Progress in Nanotechnology-Based Approaches for Food Monitoring

Silver Decoration of Vertically Aligned MoS2-MoOx Nanosheets: A Comprehensive XPS Investigation

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