Structural and optical properties analysis of MoS<sub>2</sub> nanoflakes on quartz substrate as prepared by mechanical exfoliation

Adilla, Sandy Jaka; Nurfani, Eka; Kurniawan, Robi; Satrya, Christoforus Dimas; Darma, Yudi

doi:10.1088/1742-6596/877/1/012036

Cited by 11 publications

(7 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…where α is the absorption coefficient, h is the Planck's constant, ν is the frequency of incident photon, A is the proportionality constant, Eg is the band gap energy, n = 2 for direct band gap transition and n = ½ for indirect band gap transition. The band gap calculated from the intersection to the x axis (Figure 8(b)), is 1.69 eV which satisfies with few layers of MoS2 nanosheets [29]. PL spectrum of MoS2 nanosheets at room temperature are shown in Figure 9.…”

Section: Resultsmentioning

confidence: 59%

A facile one step hydrothermal synthesis of flower-like nanosheets of MoS2 for nanoelectronics technology

Mandal

Pandey

Chakrabarti

2023

2D Photonic Materials and Devices VI

View full text Add to dashboard Cite

Transition metal dichalcogenides (TMDs) are highly efficient materials due to their vast applications in the domain of optoelectronics, photodetectors, catalysis, supercapacitors, and battery storage. Molybdenum disulfide (MoS2) is the most important TMD material due to the existence of fascinating optical, electronic, and chemical properties. Herein, we have synthesized MoS2 using a facile one-step hydrothermal technique resulting in low-cost 1T@2H MoS2 flower-like nanosheets and examined the structural, electronic, and optical properties. The field emission gun-scanning electron microscopy (FEG-SEM) images confirm the flower-like nanosheet morphology of the synthesized MoS2. Further, the Xray diffraction (XRD) peaks of MoS2 confirm the hexagonal phase with space group P63/mmc. The observed Transmission Electron Microscopy (TEM) image shows the formation of thin nanosheets of MoS2 while the crystal planes of MoS2 can be noticed from the High-Resolution Transmission Electron Microscopy (HRTEM) images. Also, an interplanar distance (d) of 0.62 nm has been observed from the HRTEM images of MoS2 nanosheets. The Raman spectrum confirms the vibrational modes corresponding to the 2H and 1T phase of MoS2 indicating the formation of a mixed phase in the structure. An excellent luminescent behavior has been observed from the photoluminescence (PL) plot. The electronic nature of the material has been evaluated from the Tauc plot and an optical band gap of 1.69 eV has been observed indicating the formation of a few layers of semiconducting MoS2. This rigorous study suggests the potential application of MoS2 in nanoelectronic devices.

show abstract

Section: Resultsmentioning

confidence: 59%

A facile one step hydrothermal synthesis of flower-like nanosheets of MoS2 for nanoelectronics technology

Mandal

Pandey

Chakrabarti

2023

2D Photonic Materials and Devices VI

View full text Add to dashboard Cite

show abstract

“…Thus, in few-layered Mn-TCN MOF, the reduction in the XRD peak intensity of the (200) plane is indicative of a fewer number of layers. A broad peak appears between 2θ = 17.42 and 37.69° in the exfoliated sample, which is attributed to the diffraction peak of the glass substrate . Powder XRD patterns of both samples are compared in Figure S2a,b.…”

Section: Resultsmentioning

confidence: 99%

Improved Electrochemical Performance in an Exfoliated Tetracyanonickelate-Based Metal–Organic Framework

Halim,

Karmakar,

Hamid

et al. 2023

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

Tetracyanonickelate (TCN)-based metal−organic frameworks (MOFs) show great potential in electrochemical applications such as supercapacitors due to their layered morphology and tunable structure. This study reports on improved electrochemical performance of exfoliated manganese tetracyanonickelate (Mn-TCN) nanosheets produced by the heat-assisted liquid-phase exfoliation (LPE) technique. The structural change was confirmed by the Raman frequency shift of the C�N band from 2177 to 2182 cm −1 and increased band gap from 3.15 to 4.33 eV in the exfoliated phase. Statistical distribution obtained from atomic force microscopy (AFM) shows that 50% of the nanosheets are single-to-four-layered and have an average lateral size of ∼240 nm 2 and thickness of ∼1.2−4.8 nm. High-resolution transmission electron microscopy (HRTEM) and selected area electron diffraction (SAED) patterns suggest that the material maintains its crystallinity after exfoliation. It exhibits an almost 6-fold improvement in specific capacitance (from 13.0 to 72.5 F g −1 ) measured at a scan rate of 5 mV s −1 in 1 M KOH solution. Galvanostatic charge−discharge (GCD) measurement shows a capacity enhancement from ∼18 F g −1 in the bulk phase to ∼45 F g −1 in the exfoliated phase at a current density of 1 A g −1 . Bulk crystals exhibit an increasing trend of capacitance retention by ∼125% over 1000 charge−discharge cycles attributed to electrochemical exfoliation. Electrochemical impedance spectroscopy (EIS) demonstrates a 5-fold reduction in the total equivalent series resistance (ESR) from 4864 Ω (bulk) to 1089 Ω (exfoliated). The enhanced storage capacity in the exfoliated phase results from the combined effect of the electrochemical double-layer charge storage mechanism at the nanosheet−electrolyte interface and the Faradic process characteristic of the pseudocapacitive charge storage behavior.

show abstract

“…The calculated band gap is ~1.63 eV, corresponding to the F-MoS 2 with the number of layers of 4–5 layers. Such property can be useful for future applications including optoelectronic devices and electronic devices [64].…”

Section: Resultsmentioning

confidence: 99%

A Hydrothermal-Assisted Ball Milling Approach for Scalable Production of High-Quality Functionalized MoS2 Nanosheets for Polymer Nanocomposites

Ahmadi

Zabihi

et al. 2019

Nanomaterials

View full text Add to dashboard Cite

The most known analogue of graphene, molybdenum disulfide (MoS2) nanosheet, has recently captured great interest because it can present properties beyond graphene in several high technological applications. Nonetheless, the lack of a feasible, sustainable, and scalable approach, in which synthesizing and functionalization of 2H-MoS2 nanosheets occur simultaneously, is still a challenge. Herein, a hydrothermal treatment has been utilised to reduce the effect of breaking mechanisms on the lateral size of produced nanosheets during the ball milling process. It was demonstrated that the hydrothermal pre-treatment led to the initial intercalation of an organic molecule such as 4,4′-diaminodiphenyl sulfone (DDS) within the stacked MoS2 sheets. Such a phenomenon can promote the horizontal shear forces and cause sliding and peeling mechanisms to be the dominated ones during low energy ball milling. Such combined methods can result in the production of 2H functionalized MoS2 nanosheets. The resultant few layers showed an average lateral dimension of more than 640 nm with the thickness as low as ~6 nm and a surface area as high as ~121.8 m2/g. These features of the synthesised MoS2 nanosheets, alongside their functional groups, can result in fully harnessing the reinforcing potential of MoS2 nanosheets for improvement of mechanical properties in different types of polymeric matrices.

show abstract

Structural and optical properties analysis of MoS₂ nanoflakes on quartz substrate as prepared by mechanical exfoliation

Cited by 11 publications

References 15 publications

A facile one step hydrothermal synthesis of flower-like nanosheets of MoS2 for nanoelectronics technology

A facile one step hydrothermal synthesis of flower-like nanosheets of MoS2 for nanoelectronics technology

Improved Electrochemical Performance in an Exfoliated Tetracyanonickelate-Based Metal–Organic Framework

A Hydrothermal-Assisted Ball Milling Approach for Scalable Production of High-Quality Functionalized MoS2 Nanosheets for Polymer Nanocomposites

Contact Info

Product

Resources

About

Structural and optical properties analysis of MoS2 nanoflakes on quartz substrate as prepared by mechanical exfoliation

Cited by 11 publications

References 15 publications

A facile one step hydrothermal synthesis of flower-like nanosheets of MoS2 for nanoelectronics technology

A facile one step hydrothermal synthesis of flower-like nanosheets of MoS2 for nanoelectronics technology

Improved Electrochemical Performance in an Exfoliated Tetracyanonickelate-Based Metal–Organic Framework

A Hydrothermal-Assisted Ball Milling Approach for Scalable Production of High-Quality Functionalized MoS2 Nanosheets for Polymer Nanocomposites

Contact Info

Product

Resources

About

Structural and optical properties analysis of MoS₂ nanoflakes on quartz substrate as prepared by mechanical exfoliation