Growth of centimeter-scale atomically thin MoS<sub>2</sub> films by pulsed laser deposition

Siegel, Gene; Subbaiah, Y.P. Venkata; Prestgard, M. C.; Tiwari, Ashutosh

doi:10.1063/1.4921580

Cited by 117 publications

(82 citation statements)

References 22 publications

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“…It has been reported that MSNs seemed to become transparent when the layer number decreased, since the MSNs became thin enough for light to pass through [18,31]. Herein, we also found that some parts of the bulk MSNs looked transparent (Fig 1A and 1B, indicated with red circles and arrows), since some of the MSN flakes were very thin.…”

Section: Resultssupporting

confidence: 70%

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Investigating the Influence of MoS2 Nanosheets on E. coli from Metabolomics Level

et al. 2016

PLoS ONE

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Molybdenum disulfide, a type of two-dimensional layered material with unique properties, has been widely used in many fields. However, an exact understanding of its toxicity remains elusive, let alone its effects on the environmental microbial community. In this study, we utilized metabolomics technology to explore the effects of different concentrations of molybdenum disulfide nanosheets on Escherichia coli for the first time. The results showed that with increasing concentration of molybdenum disulfide nanosheets, the survival rate of Escherichia coli was decreased and the release of lactic dehydrogenase was increased. At the same time, intracellular concentrations of reactive oxygen species were dramatically increased. In addition, metabolomics analysis showed that high concentrations of molybdenum disulfide nanosheets (100, 1000 μg/mL) could significantly affect the metabolic profile of Escherichia coli, including glycine, serine and threonine metabolism, protein biosynthesis, urea cycle and pyruvate metabolism. These results will be beneficial for molybdenum disulfide toxicity assessment and further applications.

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Section: Resultssupporting

confidence: 70%

“…Fortunately, MoS 2 monolayers have been successfully grown on SiO 2 /Si substrates by chemical vapor deposition (CVD) [17]. Moreover, pulsed laser deposition (PLD) also showed great potential for growing monolayer and thin multi-layer MoS 2 films [18]. …”

Section: Introductionmentioning

confidence: 99%

Investigating the Influence of MoS2 Nanosheets on E. coli from Metabolomics Level

et al. 2016

PLoS ONE

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“…In prior studies it has been demonstrated that the separation between these modes can be used to determine the number of monolayers [3]. The observed peak separation of 23.0 cm −1 in the present study confirmed the formation of trilayer MoS 2 [39,43].…”

Section: Methodssupporting

confidence: 78%

“…Trilayer MoS 2 films were grown on sapphire substrates by pulsed laser deposition (PLD) following the procedure described in previous report [39]. The number of monolayers deposited was controlled precisely by controlling the number of laser pulses.…”

Section: Methodsmentioning

confidence: 99%

“…These experimental requirements are indeed quite challenging in the case of micron sized MoS 2 films normally produced by exfoliation based techniques. However, recently the growth of centimeter-scale high-quality 2D MoS 2 films by CVD and PVD techniques has been demonstrated by several groups [3, 39,40]. Availability of these relatively large area films now can catalyze the spin transport studies on this exotic material system.…”

Section: Introductionmentioning

confidence: 99%

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Signature of Hanle precession in trilayer MoS2 : Theory and experiment

et al. 2017

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Valley-spin coupling in transition-metal dichalcogenides (TMDs) can result in unusual spin transport behaviors under an external magnetic field. Nonlocal resistance measured from 2D materials such as TMDs via electrical Hanle experiments are predicted to exhibit nontrivial features, compared with results from conventional materials due to the presence of intervalley scattering as well as a strong internal spin-orbit field. Here, for the first time, we report the all-electrical injection and non-local detection of spin polarized carriers in trilayer MoS2 films. We calculate the Hanle curves theoretically when the separation between spin injector and detector is much larger than spin diffusion length, λs. The experimentally observed curve matches the theoretically-predicted Hanle shape under the regime of slow intervalley scattering. The estimated spin life-time was found to be around 110 ps at 30 K.

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Atomically Thin MoS₂: A Versatile Nongraphene 2D Material

Subbaiah

Saji

Tiwari

2016

Adv Funct Materials

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225

131

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Two-dimensional inorganic materials are emerging as a premiere class of materials for fabricating modern electronic devices. The interest in 2D layered transition metal dichalcogenides is especially high. Particularly, 2D MoS 2 is being heavily researched due to its novel functionalities and its suitability for a wide range of electronic and optoelectronic applications. In this article, the progress in mono/few layer(s) MoS 2 research is reviewed by focusing primarily on the layer dependent evolution of crystal, phonon, and electronic structure. The review includes extensive detail into the methodologies adapted for single or few layer(s) MoS 2 growth. Further, the review covers the versatility of 2D MoS 2 for a broad range of device applications. Recent advancements in the fi eld of van der Waals heterostructures are also highlighted at the end of the review. Unlike zero-band gap graphene (semimetal), [ 8 ] and large band gap hBN (insulator), [ 9 ] the 2D transition metal dichalcogenides (sulfi des and selenides) have band gaps comparable to conventional Si or GaAs, and thus present a tantalizing prospect of scaling all semiconductor science and technology down to a truly atomic scale. Although these transition metal dichalcogenides (TMDCs) are quite well known for the past few decades for their applications in solid state lubricants, [ 10 ] photovoltaic devices, [ 11,12 ] and rechargeable batteries, [ 13 ] the recent methodologies and concepts evolved from graphene research like exfoliation, transfer, and manipulation of 2D materials have driven interest toward the exploration of layered TMDCs. TMDCs possess hexagonal layers of transition metal atoms (M) sandwiched between two layers of chalcogen atoms (X) with an MX 2 stoichiometry. Depending on the different combinations of chalcogen (typically S, Se, or Te) and transition metal (mainly Mo and W) elements, several different kinds of TMDCs are possible. Among the various combinations of TMDCs, MoS 2 is the most promising 2D material as its elemental constituents are abundant, nontoxic, and amenable for easy mono/few layer(s) synthesis when compared to their analogous selenides and tellurides. DOIDespite graphene's exceptionally high carrier mobility, [ 14 ] fi eld-effect transistors (FETs) made from graphene cannot effectively function as electronic switches due to the absence of an electronic band gap. [ 15,16 ] 2D MoS 2 possesses a relatively high mobility up to 200 cm 2 (V-s) −1 with a high on/off current ratio of ≈10 8 at room temperature, [17][18][19][20] and has a layer dependent band gap with a crossover from indirect (1.2 eV) to direct (1.9 eV) at the bulk to monolayer transition, making this a promising material for effi cient electronic, [ 17,21 ] and optoelectronic devices. [22][23][24] The unique electronic band structure and optical properties of monolayer MoS 2 are suitable for a wide range of novel functional devices and hence has triggered exhaustive research on this nongraphene material during the last few years. [ 2,7,[25][26][27][28][29][30]...

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Growth of centimeter-scale atomically thin MoS₂ films by pulsed laser deposition

Cited by 117 publications

References 22 publications

Investigating the Influence of MoS2 Nanosheets on E. coli from Metabolomics Level

Investigating the Influence of MoS2 Nanosheets on E. coli from Metabolomics Level

Signature of Hanle precession in trilayer MoS2 : Theory and experiment

Atomically Thin MoS₂: A Versatile Nongraphene 2D Material

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Growth of centimeter-scale atomically thin MoS2 films by pulsed laser deposition

Cited by 117 publications

References 22 publications

Investigating the Influence of MoS2 Nanosheets on E. coli from Metabolomics Level

Investigating the Influence of MoS2 Nanosheets on E. coli from Metabolomics Level

Signature of Hanle precession in trilayer MoS2 : Theory and experiment

Atomically Thin MoS2: A Versatile Nongraphene 2D Material

Contact Info

Product

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Growth of centimeter-scale atomically thin MoS₂ films by pulsed laser deposition

Atomically Thin MoS₂: A Versatile Nongraphene 2D Material