Growth and optical characterization of MoS2 single crystals with different dopants

Sigiro, Mula; Mn, Nasruddin

doi:10.1016/j.ijleo.2014.07.140

Cited by 7 publications

(4 citation statements)

References 23 publications

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“…Crystals grown by CVT are often used as precursors for preparing mechanically exfoliated MoS 2 monolayers because of the ease of synthesis and the quality of the product. Sigiro and Nasruddin 70 showed that the phase of CVT-grown crystals can be controlled by choice of dopant. The authors tested Re, Nb, Fe, Co, and Ni and observed that Re and Nb dopants lead to preferential 3R-MoS 2 crystal growth.…”

Section: Polytype Definitionmentioning

confidence: 99%

3R-MoS₂ in Review: History, Status, and Outlook

Strachan

Masters

Maschmeyer

2021

ACS Appl. Energy Mater.

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Transition metal dichalcogenides (TMDs) of molybdenum and tungsten are layered van der Waals materials that exhibit a rich array of polytypes. The different possible arrangements of the constituents of the “two-dimensional” MX2 sheets (where M = group 4–10 elements, X = chalcogen) give rise to a host of interesting and tunable phenomena. Molybdenite, or molybdenum disulfide (MoS2) in its most abundant and thermodynamically stable form, 2H-MoS2, is perhaps the most widely used TMD, though the potential applications of its metastable polytypes have been recognized only recently. From among the polytypes, the 3R-MoS2 (rhombohedral) phase has attracted the most interest because of its thermodynamic stability, ABC stacking (as opposed to the AA′ of the more common 2H-MoS2), and lack of inversion symmetry. These properties make it an excellent candidate for photonics, optoelectronics, and catalysis. Because the literature on this material is rapidly expanding, this review seeks to summarize the history, known and predicted characteristics, syntheses, and applications, as well as common misconceptions of, and surrounding, 3R-MoS2. Although the review is chemically focused, it includes suggested reading to cover a broader scope.

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Section: Polytype Definitionmentioning

confidence: 99%

3R-MoS₂ in Review: History, Status, and Outlook

Strachan

Masters

Maschmeyer

2021

ACS Appl. Energy Mater.

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“…Besides being a quencher, TMD nanosheets could also be used as fluorescent species (i.e., electron donor) in FRET‐based sensors. Chemical doping in 2D nanomaterials could change their band gap and thus affect their optical properties . Bearing this in mind, Feng et al developed a sonication method to prepare boron‐ and nitrogen‐co‐doped MoS 2 (B,N–MoS 2 ) nanosheets .…”

Section: Tmd Nanosheets and Their Composite‐based Optical 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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“…25,26 Dopant incorporation into MoS 2 and other TMDs is also employed to control dopant concentration and dopant type for electronic applications, 27,28 and dopants may even alter the crystal structure. 29,30 Ni dopant addition has also been studied to improve the optical and optoelectronic properties of MoS 2 , as shown by reflectance, electroreflectance, and photoconductivity measurements. 29,31,32 We previously reported electrodeposition and annealing to form MoS 2 and Cu-doped MoS 2 thin films.…”

mentioning

confidence: 99%

“…29,30 Ni dopant addition has also been studied to improve the optical and optoelectronic properties of MoS 2 , as shown by reflectance, electroreflectance, and photoconductivity measurements. 29,31,32 We previously reported electrodeposition and annealing to form MoS 2 and Cu-doped MoS 2 thin films. 33,34 Here we report electrodeposition of Ni-doped MoS 2 and preliminary results for its possible applications to catalysis of the hydrogen evolution reaction, and as an electrode material within electrochemical supercapacitors.…”

mentioning

confidence: 99%

Electrodeposition of Ni-doped MoS₂ Thin Films

Giang

Adil

Suni

2020

J. Electrochem. Soc.

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Ni-doped MoS 2 thin films were fabricated by electrodeposition from electrolytes containing both MoS 4 2− and varying concentrations of Ni 2+ , followed by annealing at 400 °C for 2 h in an Ar atmosphere. The film resistivity decreased from 32.8 μΩ-cm for un-doped MoS 2 to 11.3 μΩ-cm for Ni-doped MoS 2 containing 9 atom% Ni. For all Ni dopant levels studied, only the X-ray diffraction (XRD) pattern expected for MoS 2 is observed, with the average grain size increasing with increasing Ni content. Ni-doped MoS 2 thin films were tested for their activity towards the hydrogen evolution reaction (HER) in 0.5 M H 2 SO 4 . Tafel equation fits reveal that the catalytic activity for the HER, as measured by the exchange current density, increases up to 6 atom% Ni, and then decreases slightly for 9 atom% Ni. Ni-doped MoS 2 thin films were also tested in 1.0 M Na 2 SO 4 for use within electrochemical supercapacitors, and the capacitance per unit area increases by 2-3x for 9 atom% Ni-doped MoS 2 relative to undoped MoS 2 . The highest capacitance obtained for Ni-doped MoS 2 during galvanostatic charge-discharge measurements is ∼300 F g −1 .

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Growth and optical characterization of MoS2 single crystals with different dopants

Cited by 7 publications

References 23 publications

3R-MoS₂ in Review: History, Status, and Outlook

3R-MoS₂ in Review: History, Status, and Outlook

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

Electrodeposition of Ni-doped MoS₂ Thin Films

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Growth and optical characterization of MoS2 single crystals with different dopants

Cited by 7 publications

References 23 publications

3R-MoS2 in Review: History, Status, and Outlook

3R-MoS2 in Review: History, Status, and Outlook

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

Electrodeposition of Ni-doped MoS2 Thin Films

Contact Info

Product

Resources

About

3R-MoS₂ in Review: History, Status, and Outlook

3R-MoS₂ in Review: History, Status, and Outlook

Electrodeposition of Ni-doped MoS₂ Thin Films