Plasma Modified MoS<sub>2</sub> Nanoflakes for Surface Enhanced Raman Scattering

Sun, Linfeng; Hu, Hailong; Zhan, Da; Yan, Jiaxu; Liu, Lei; Teguh, Jefri S.; Yeow, Edwin K. L.; Lee, Pooi See; Shen, Zexiang

doi:10.1002/smll.201300798

Cited by 134 publications

(136 citation statements)

References 35 publications

(65 reference statements)

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“…This is because surface modification creates stronger interaction between the 2D materials and the analyte molecules, resulting in enhanced Raman intensity. For instance, plasma treated MoS 2 showed enhanced SERS performance with very high suppression of background signals, attributed to the formation of surface defects caused by the introduction of gaseous species . There is another report in which.…”

Section: D Inorganic Nanomaterials For Sensingmentioning

confidence: 99%

“…A detailed investigation on the surface properties of MoS 2 nanoflakes, plasma treated MoS 2 and pristine MoS 2 on the enhancement of the Raman spectra of R6G molecules has been conducted . The plasma treated MoS 2 led to the generation of local dipoles and oxygen adsorption on the MoS 2 layer, where the structural disorder induced local dipole and oxygen adsorption provided enhanced Raman scattering.…”

Section: D‐transition Metal Chalcogenides For Sensingmentioning

confidence: 99%

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Recent Advances in 2D Inorganic Nanomaterials for SERS Sensing

et al. 2019

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Surface‐enhanced Raman spectroscopy is a powerful and sensitive analytical tool that has found application in chemical and biomolecule analysis and environmental monitoring. Since its discovery in the early 1970s, a variety of materials ranging from noble metals to nanostructured materials have been employed as surface enhanced Raman scattering (SERS) substrates. In recent years, 2D inorganic materials have found wide use in the development of SERS‐based chemical sensors owing to their unique thickness dependent physico‐chemical properties with enhanced chemical‐based charge‐transfer processes. Here, recent advances in the application of various 2D inorganic nanomaterials, including graphene, boron nitride, semiconducting metal oxides, and transition metal chalcogenides, in chemical detection via SERS are presented. The background of the SERS concept, including its basic theory and sensing mechanism, along with the salient features of different nanomaterials used as substrates in SERS, extending from monometallic nanoparticles to nanometal oxides, is comprehensively discussed. The importance of 2D inorganic nanomaterials in SERS enhancement, along with their application toward chemical detection, is explained in detail with suitable examples and illustrations. In conclusion, some guidelines are presented for the development of this promising field in the future.

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Section: D Inorganic Nanomaterials For Sensingmentioning

confidence: 99%

Section: D‐transition Metal Chalcogenides For Sensingmentioning

confidence: 99%

Recent Advances in 2D Inorganic Nanomaterials for SERS Sensing

et al. 2019

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“…Two Raman enhancement mechanisms, i.e., charge transfer and dipole–dipole coupling, may co‐occur on MoS 2 nanosheets. Later, Sun et al investigated the SERS effect of oxygen/argon plasma treated MoS 2 nanosheets for Rhodamine 6G (R6G) molecules ( Figure a) . It was shown that structural disorders were generated by the plasma bombardment process, leading to the generation of local dipoles and adsorption of oxygen at ambient atmosphere.…”

Section: Tmd Nanosheets and Their Other Composite‐based Sensorsmentioning

confidence: 99%

Recent Advances in Sensing Applications of Two‐Dimensional Transition Metal Dichalcogenide Nanosheets and Their Composites

Ping

Fan

Sindoro

et al. 2017

Adv Funct Materials

230

136

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of 18) 1605817As a newly emerging class of nanomaterials, 2D TMD nanosheets possess a unique layered structure and large surface areas, as well as outstanding physical, chemical, optical, and electronic properties, which holds great potential for applications in catalysis, [37] sensing, [38] optics, [39] and energy. [40] In this review, we will focus on the introduction of state of the art sensing applications for 2D TMD nanosheets and their composites. In particular, different sensing strategies together with signal-transducing mechanisms in sensors based on 2D TMD nanosheets and their composites are thoroughly discussed. Our aim is to demonstrate a complete concept in this rapidly emerging research area and to address basic knowledge, opportunities, and challenges in this promising field. We expect that more 2D TMD nanosheets and their composites, as well as more sensing strategies, will be explored in this research field, enabling the fabrication of more accurate sensing devices for practical applications. TMD Nanosheets and Their Composite-Based Electrochemical SensorsThe electrochemical method has been extensively recognized as a powerful tool for fast access to biochemical information in complex samples due to its easy operation, fast response, high sensitivity, and low cost. Inspired by the use of graphene as transducers in electrochemical sensors, [41][42][43] researchers have attempted to use 2D TMD nanosheets as a transducer layer. Their good conductivity, large surface area, fast electron transfer kinetics, high signal/noise ratio, and, more importantly, their feasibility for forming composites, make 2D TMD nanosheets attractive as for electrochemical sensors. [44][45][46][47][48][49][50] Table 1 summarizes the recent progress of electrochemical sensors based on 2D TMD nanosheets and their composites. TMD Nanosheets as a Transducer Layer in Electrochemical SensorsIn 2012, our group developed a single-layer TMD-nanosheetbased electrochemical sensor, in which a single-layer MoS 2nanosheet-modified glassy carbon electrode was directly used for selective detection of dopamine in the presence of uric acid Two-dimensional (2D) transition metal dichalcogenide (TMD) nanosheets, such as MoS 2 , WS 2 , etc., are attracting increasing interest due to their intriguing physical, chemical, electronic, and optical properties. Success in development of methods for large-scale production of 2D TMD nanosheets and their composites has given great potential for various novel applications. In this review, recent progress in sensing applications of 2D TMD nanosheets and their composites is introduced. Moreover, different sensing strategies and signal-transducing mechanisms for sensing devices based on 2D TMD nanosheets and their composites are also summarized and discussed.

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“…These functionalization and surface treatments will modify the Fermi level of graphene and thus affect Raman scattering intensity of molecules on graphene through charge transfer resonance conditions [44]. Surface treated MoS 2 shows enhanced Raman intensities of R6G molecules by one order of magnitude compared with pristine MoS 2 flakes [45]. The introduction of defects in T-MoS 2 samples changes the local surface properties of MoS 2 nanoflakes, such as creating the local dipoles, which give rise to the enhancement of Raman signals of R6G molecules and absorbance of the oxygen in ambient air to dope holes in MoS 2 , resulting in the enhanced charge transfer effect between R6G and MoS 2 .…”

Section: Raman Enhancement Mechanism Of Two-dimensional Materialsmentioning

confidence: 99%

A Review on Applications of Two-Dimensional Materials in Surface-Enhanced Raman Spectroscopy

Xia

2018

International Journal of Spectroscopy

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Two-dimensional (2D) materials, such as graphene and MoS 2 , have been attracting wide interest in surface enhancement Raman spectroscopy. This perspective gives an overview of recent developments in 2D materials' application in surface-enhanced Raman spectroscopy. This review paper focuses on the applications of using bare 2D materials and metal/2D material hybrid substrate for Raman enhancement. The Raman enhancing mechanism of 2D materials will also be discussed. The progress covered herein shows great promise for widespread adoption of 2D materials in SERS application.

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Plasma Modified MoS₂ Nanoflakes for Surface Enhanced Raman Scattering

Cited by 134 publications

References 35 publications

Recent Advances in 2D Inorganic Nanomaterials for SERS Sensing

Recent Advances in 2D Inorganic Nanomaterials for SERS Sensing

Recent Advances in Sensing Applications of Two‐Dimensional Transition Metal Dichalcogenide Nanosheets and Their Composites

A Review on Applications of Two-Dimensional Materials in Surface-Enhanced Raman Spectroscopy

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Plasma Modified MoS2 Nanoflakes for Surface Enhanced Raman Scattering

Cited by 134 publications

References 35 publications

Recent Advances in 2D Inorganic Nanomaterials for SERS Sensing

Recent Advances in 2D Inorganic Nanomaterials for SERS Sensing

Recent Advances in Sensing Applications of Two‐Dimensional Transition Metal Dichalcogenide Nanosheets and Their Composites

A Review on Applications of Two-Dimensional Materials in Surface-Enhanced Raman Spectroscopy

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Plasma Modified MoS₂ Nanoflakes for Surface Enhanced Raman Scattering