E’’ Raman Mode in Thermal Strain-Fractured CVD-MoS2

Wu, Di; Huang, Han; Zhu, Xing; He, Yuhui; Xie, Qiliang; Chen, Xiaoliu; Zheng, Xiaoming; Duan, Huigao; Gao, Yongli

doi:10.3390/cryst6110151

Cited by 17 publications

(15 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It was also shown that the nitrogen doping could be an effective way to produce hole doping in MoS 2 monolayers by creating N S acceptor defects. The presence of weak side peaks at about 409 and 378 cm −1 (see Figure (b)) also confirms a high defect concentration in our monolayer, because these peaks were previously assigned to the defect‐induced modes …”

Section: Resultssupporting

confidence: 82%

Photoluminescence Study of B‐Trions in MoS₂ Monolayers with High Density of Defects

Kaupmees

Komsa

Krustok

2018

Physica Status Solidi (b)

View full text Add to dashboard Cite

Photoluminescence spectroscopy has been used to investigate the details of B band emission from single‐layer MoS2 samples grown by chemical vapor deposition. The evolution of the peak shape upon variable excitation power is well described by a combination of exciton and trion contributions, from which B trion binding energy of 18 meV has been extracted. It has been suggested that the absence of accompanying A trion emission in our samples, as well as the enhanced intensity of the B band, can be ascribed to a fast non‐radiative recombination channel arising from the large defect density in our samples. It has been found that band‐selective recombination channels or formation of dark/bright trions are possible microscopic scenarios for our observations.

show abstract

Section: Resultssupporting

confidence: 82%

Photoluminescence Study of B‐Trions in MoS₂ Monolayers with High Density of Defects

Kaupmees

Komsa

Krustok

2018

Physica Status Solidi (b)

View full text Add to dashboard Cite

show abstract

“…Two kinds of MoS 2 samples coexist in different shapes: broken triangle and 1D nanobelt. The inserted height profile along the green solid line in Figure a reveals that the flake is ∼1.0 nm‐thick while the nanobelt is ∼1.9 nm‐thick and 0.5 µm‐wide, indicating that the transferred MoS 2 nanobelt is bilayer . Intuitively, it is considered that bilayer MoS 2 formed on MoO 2 nanorods.…”

Section: Resultsmentioning

confidence: 99%

From MoO₂@MoS₂ Core–Shell Nanorods to MoS₂ Nanobelts

Shi

Zheng

et al. 2018

Physica Status Solidi (b)

Self Cite

View full text Add to dashboard Cite

One‐dimensional (1D) atomically thin crystals have attracted considerable interests due to their unique properties and potential applications. For example, reducing graphene physical size down to nanoscale to nanoribbons opens up band gaps, which makes graphene useful in electronic devices. Here, a facile approach to produce single‐ and bi‐layered MoS2 nanobelts by PMMA assisted decoupling of MoO2@MoS2 core–shell nanorods is reported by the authors. Atomic force microscopy (AFM), Raman and photoluminescence (PL) results show that the decoupled monolayer staple‐like MoS2‐shells can fold into bilayer nanobelts during the PMMA removal process. Raman, high‐resolution transmission electron microscopy (HRTEM) and selected area electron diffraction (SAED) results reveal that the left MoO2 nanorods exhibit high crystal‐quality. These findings provide a method to produce 1D MoS2 nanobelts, which have potential applications in electronics and catalysis.

show abstract

“…The Raman and PL intensities on MoS 2 nanoribbons are stronger and weaker than on MoS 2 flakes, respectively, indicating that such nanoribbons grow on flakes. AFM measurements exhibit that the number of layer of MoS 2 nanoribbons are 1–3 . STEM and SAED results confirm that such MoS 2 nanoribbons grow along MoS 2

true〈 10 true \bar{1} 0 true〉

direction .…”

mentioning

confidence: 64%

“…Figure a shows the Raman spectra of MoS 2 nanoribbons (black) and bottom flakes (red), respectively. Two characteristic Raman peaks for MoS 2 , E 1 2g and A 1g , can be observed . It is well known that the frequency difference between E 1 2g and A 1g Raman peaks increases with the number of layer due to the interlayer van der Waals interaction and dielectric screening of the long range Coulombic interaction .…”

mentioning

confidence: 92%

CVD Grown MoS₂ Nanoribbons on MoS₂ Covered Sapphire(0001) Without Catalysts

Shi

Zheng

et al. 2019

Physica Rapid Research Ltrs

Self Cite

View full text Add to dashboard Cite

One‐dimensional (1D) atomically thin crystals have attracted considerable interest due to their unique properties and potential applications. Herein, the chemical vapor deposition (CVD) growth of molybdenum disulfide (MoS2) nanoribbons on sapphire(0001) supported monolayer MoS2 flakes without catalysts as well as the characterizations by means of Raman and photoluminescence (PL) spectroscopy, optical microscopy (OM), atomic force microscopy (AFM), and scanning transmission electron microscopy (STEM). The Raman and PL results is reported, as well as OM images reveal that such MoS2 nanoribbons grow on monolayer MoS2 flakes. STEM and selected area electron diffraction (SAED) results reveal that they are grown along the true〈10true1¯0true〉 direction with atomically sharp edges. Controlled experiments show that the deficiency of sulfur vapor at the beginning of growth induced 1D MoOxS2−x crystals as precursors. The subsequent sulfurization changes them into MoS2 nanoribbons. These findings provide a facile approach to MoS2 nanoribbons and enrich the horizon of the preparation of nanostructured transition metal dichalcogenides.

show abstract

E’’ Raman Mode in Thermal Strain-Fractured CVD-MoS2

Cited by 17 publications

References 39 publications

Photoluminescence Study of B‐Trions in MoS₂ Monolayers with High Density of Defects

Photoluminescence Study of B‐Trions in MoS₂ Monolayers with High Density of Defects

From MoO₂@MoS₂ Core–Shell Nanorods to MoS₂ Nanobelts

CVD Grown MoS₂ Nanoribbons on MoS₂ Covered Sapphire(0001) Without Catalysts

Contact Info

Product

Resources

About

E’’ Raman Mode in Thermal Strain-Fractured CVD-MoS2

Cited by 17 publications

References 39 publications

Photoluminescence Study of B‐Trions in MoS2 Monolayers with High Density of Defects

Photoluminescence Study of B‐Trions in MoS2 Monolayers with High Density of Defects

From MoO2@MoS2 Core–Shell Nanorods to MoS2 Nanobelts

CVD Grown MoS2 Nanoribbons on MoS2 Covered Sapphire(0001) Without Catalysts

Contact Info

Product

Resources

About

Photoluminescence Study of B‐Trions in MoS₂ Monolayers with High Density of Defects

Photoluminescence Study of B‐Trions in MoS₂ Monolayers with High Density of Defects

From MoO₂@MoS₂ Core–Shell Nanorods to MoS₂ Nanobelts

CVD Grown MoS₂ Nanoribbons on MoS₂ Covered Sapphire(0001) Without Catalysts