A novel sensitive and stable surface enhanced Raman scattering substrate based on a MoS<sub>2</sub> quantum dot/reduced graphene oxide hybrid system

Wu, Di; Chen, Jianli; Ruan, Yaner; Sun, Kai; Zhang, Kehua; Xie, Wenjie; Xie, Fang; Zhao, Xiaoli; Wang, Xiufang

doi:10.1039/c8tc05151h

Cited by 34 publications

(14 citation statements)

References 37 publications

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“…As shown in Figure a, the MoS 2 QDs were spherical and well dispersed. The HRTEM image (inset) of the MoS 2 QDs indicated high crystallinity with a lattice fringe of about 0.25 nm, which was consistent with that of the (103) plane of MoS 2 nanocrystals. , As observed, the particle size distributions of the MoS 2 QDs are summarized in Figure b. The resulting MoS 2 QDs were highly uniform and monodisperse, ranging from 2 to 4.5 nm, and the average MoS 2 particle diameter was about 3.28 nm (the size was calculated from the statistical analysis of several hundred QDs in the TEM image).…”

Section: Resultssupporting

confidence: 70%

Flexible Synergistic MoS₂ Quantum Dots/PEDOT: PSS Film Sensor for Acetaldehyde Sensing at Room Temperature

et al. 2023

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Acetaldehyde (CH 3 CHO) is known as a primary carcinogen, and the development of wearable gas sensors for its detection at room temperature has rarely been rarely reported. Herein, MoS 2 quantum dots (MoS 2 QDs) have been employed to dope with poly(3,4-ethylenedioxythiophene): polystyrenesulfonate (PEDOT: PSS) via a simple in situ polymerization technique, and the CH 3 CHO gas-sensing properties of the resultant flexible and transparent film were investigated. MoS 2 QDs had been evenly dispersed into the polymer, and it was shown that PEDOT: PSS doped with the 20 wt % MoS 2 QDs sensor exhibited the highest response value of 78.8% against 100 ppm CH 3 CHO and its detection limit reached 1 ppm. Moreover, the sensor response remained stable for more than 3 months. In particular, the different bending angles (from 60 to 240°) had little effect on the sensor response to CH 3 CHO. The possible reason for the enhanced sensing properties was attributed to the large number of reaction sites on the MoS 2 QDs and the direct charge transfer between the MoS 2 QDs and PEDOT: PSS. This work suggested a platform to inspire MoS 2 QDs-doping PEDOT: PSS materials as wearable gas sensors for highly sensitive chemoresistive sensors to detect CH 3 CHO at room temperature.

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Section: Resultssupporting

confidence: 70%

Flexible Synergistic MoS₂ Quantum Dots/PEDOT: PSS Film Sensor for Acetaldehyde Sensing at Room Temperature

et al. 2023

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“…Considering the situation in our experiment, attributed to the rough surfaces with a relatively high area ratio of the hierarchical MoS 2 matrix, the significant aggregation of Ag NPs with an appropriate interparticle spacing could form and be maintained on the matrix, which benefits the formation of the electromagnetic “hot spots”. Additionally, the enrichment of Ag NPs on the surface of MoS 2 nanoflowers further raises the total number of effective 4MBA molecules on the noble metal, which will contribute to the overall Raman signal intensity. − …”

Section: Resultsmentioning

confidence: 99%

In Situ Recyclable Surface-Enhanced Raman Scattering-Based Detection of Multicomponent Pesticide Residues on Fruits and Vegetables by the Flower-like MoS₂@Ag Hybrid Substrate

Chen

Liu

Tian

et al. 2020

ACS Appl. Mater. Interfaces

165

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Pesticides, extensively used in agriculture production, have received enormous attention because of their potential threats to the environment and human health. Hence, in this study, a kind of highly sensitive and stable hybrid surface-enhanced Raman scattering (SERS)-active substrates constructed with flower-like two-dimensional molybdenum sulfide and Ag (MoS2@Ag) has been developed, and then the above substrate was sequentially utilized in the recyclable detection of pesticide residues on several kinds of fruits and vegetables. In the first place, the excellent photocatalytic performance of the MoS2@Ag hybrid substrate was demonstrated, which was attributed to the inhibition of electron–hole combination after the formation of Schottky barrier between the Ag NPs and MoS2 matrix. Thereafter, two calibration curves with ultra-low limits of detection (LOD) as 6.4 × 10–7 and 9.8 × 10–7 mg/mL were established for the standard solutions of thiram (tetramethylthiuram disulfide, TMTD) and methyl parathion (MP), and then the recyclable assay of their single and mixed residues on eggplant, Chinese cabbage, grape, and strawberry was successfully realized. It is interesting to note that the detection recoveries from 95.5 to 63.1% for TMTD and 92.3 to 62.6% for MP are greatly dependent on the size and surface roughness of these foods. In a word, the MoS2@Ag composite matrix shows attractive SERS and photocatalysis performance, and it is expected to have the potential application on food safety monitoring.

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“…Conventional noble-metal materials (such as gold and silver) with excellent SPR effects are the most widely employed SERS substrates. However, the shortcomings of noble-metal-based SERS substrates, for example, poor stability, scarcity, high cost, and low biological compatibility, limit their wide practical application. − To find a more suitable alternative to noble metals and obtain superior Raman scattering enhancement, research on SERS-related substrate materials has gradually turned to metal oxide semiconductors and some two-dimensional (2D) semiconductors, for instance, TiO 2 , W 18 O 49 , Cu 2 O, WO 3– X , , ZnO, MoS 2 , , WS2, graphene oxide (GO), and SnSe 2 . They have outstanding merits in the aspects of low invasiveness, reproducibility, and versatility.…”

Section: Introductionmentioning

confidence: 99%

Plasmonic Hybrid Mo/MoO₂ Nanospheres as Surface-Enhanced Raman Scattering Substrates for Molecular Detection

Zhou

Zhao

Xie

et al. 2020

ACS Appl. Nano Mater.

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Here, the plasmonic Mo/MoO2 hybrid nanospheres have been fabricated through a simple hydrothermal self-assembly process. The Mo/MoO2 nanospheres assembled from plasmonic Mo and MoO2 nanoparticles have loose nanostructures and exhibit an enhanced surface plasmon resonance (SPR) effect in the visible-light range. The Mo/MoO2 nanospheres are used as surface-enhanced Raman spectroscopy (SERS) substrates for the detection of trace organic pollutants, such as rhodamine 6G (R6G), rhodamine B, and methylene blue, which exhibit ultrasensitive SERS activity. The minimum limit of detection for R6G is 1.0 × 10–10 M, and the highest enhancement factor is up to 6.2 × 107. The theoretical calculations and experimental results indicate that the extraordinary sensitivity is mainly ascribed to the synergistic plasmonic effects between Mo and MoO2 nanoparticles in the hybrid nanospheres, which lead to the strong electromagnetic coupling between substrates and target molecules. This study provides an approach to optimizing the SERS performance of semiconductor-based substrates.

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A novel sensitive and stable surface enhanced Raman scattering substrate based on a MoS₂ quantum dot/reduced graphene oxide hybrid system

Abstract: A MoS2 QD/rGO nanocomposite is synthesized as a novel highly sensitive and stable surface SERS substrate for dye molecular detection.

Cited by 34 publications

References 37 publications

Flexible Synergistic MoS₂ Quantum Dots/PEDOT: PSS Film Sensor for Acetaldehyde Sensing at Room Temperature

Flexible Synergistic MoS₂ Quantum Dots/PEDOT: PSS Film Sensor for Acetaldehyde Sensing at Room Temperature

In Situ Recyclable Surface-Enhanced Raman Scattering-Based Detection of Multicomponent Pesticide Residues on Fruits and Vegetables by the Flower-like MoS₂@Ag Hybrid Substrate

Plasmonic Hybrid Mo/MoO₂ Nanospheres as Surface-Enhanced Raman Scattering Substrates for Molecular Detection

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A novel sensitive and stable surface enhanced Raman scattering substrate based on a MoS2 quantum dot/reduced graphene oxide hybrid system

Abstract: A MoS2 QD/rGO nanocomposite is synthesized as a novel highly sensitive and stable surface SERS substrate for dye molecular detection.

Cited by 34 publications

References 37 publications

Flexible Synergistic MoS2 Quantum Dots/PEDOT: PSS Film Sensor for Acetaldehyde Sensing at Room Temperature

Flexible Synergistic MoS2 Quantum Dots/PEDOT: PSS Film Sensor for Acetaldehyde Sensing at Room Temperature

In Situ Recyclable Surface-Enhanced Raman Scattering-Based Detection of Multicomponent Pesticide Residues on Fruits and Vegetables by the Flower-like MoS2@Ag Hybrid Substrate

Plasmonic Hybrid Mo/MoO2 Nanospheres as Surface-Enhanced Raman Scattering Substrates for Molecular Detection

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Product

Resources

About

A novel sensitive and stable surface enhanced Raman scattering substrate based on a MoS₂ quantum dot/reduced graphene oxide hybrid system

Flexible Synergistic MoS₂ Quantum Dots/PEDOT: PSS Film Sensor for Acetaldehyde Sensing at Room Temperature

Flexible Synergistic MoS₂ Quantum Dots/PEDOT: PSS Film Sensor for Acetaldehyde Sensing at Room Temperature

In Situ Recyclable Surface-Enhanced Raman Scattering-Based Detection of Multicomponent Pesticide Residues on Fruits and Vegetables by the Flower-like MoS₂@Ag Hybrid Substrate

Plasmonic Hybrid Mo/MoO₂ Nanospheres as Surface-Enhanced Raman Scattering Substrates for Molecular Detection