Thickness-dependent phase transition and optical behavior of MoS2 films under high pressure

Cheng, Xuerui; Shang, Jimin; Hu, Chuansheng; Ren, Yufen; Liu, Miao; Qi, Zeming

doi:10.1007/s12274-017-1696-y

Cited by 34 publications

(29 citation statements)

References 46 publications

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“…We found that the bandgap behavior of MoS 2 /tetracene is similar to that of the monolayer MoS 2 , which exhibits a concave-downward curve with the maximum bandgap of 0.87 and 1.80 eV found at the pressure of −7.78 and −10.69 GPa for the MoS 2 /tetracene and monolayer MoS 2 , respectively. The concave-downward curve for the bandgap versus the pressure for the MoS 2 system was found to be in good agreement with experiment, 35 while that for the MoS 2 /tetracene is similar to that of an n-type semiconductor, the MoS 2 /PEI interface, in the previous study. 33,36 There is a little difference in the behavior of the bandgap versus the pressure for MoS 2 /F 4 TCNQ and MoS 2 /PTCDA compared to that of the monolayer MoS 2 .…”

Section: Resultssupporting

confidence: 86%

N-type and p-type molecular doping on monolayer MoS₂

Chihaia

et al. 2021

RSC Adv.

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Section: Resultssupporting

confidence: 86%

N-type and p-type molecular doping on monolayer MoS₂

Chihaia

et al. 2021

RSC Adv.

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“…155 This can be avoided by encapsulation of the monolayer by h-BN 155 that increases the 2D material effective thickness. Alternatively, monolayers are deposited directly on the diamond anvil surface [156][157][158][159] rather than on Si/SiO 2 substrates. Indeed, these latter were found to add extra strain, thus unbalancing the ideal hydrostatic condition and introducing intralayer distortions apparent as a splitting and softening of the Raman modes.…”

Section: E Hydrostatic Pressurementioning

confidence: 99%

Strain-tuning of the electronic, optical, and vibrational properties of two-dimensional crystals

Blundo

Cappelluti

Felici

et al. 2021

Applied Physics Reviews

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The variegated family of two-dimensional (2D) crystals has developed rapidly since the isolation of its forerunner: Graphene. Their planeconfined nature is typically associated with exceptional and peculiar electronic, optical, magnetic, and mechanical properties, heightening the interest of fundamental science and showing promise for applications. Methods for tuning their properties on demand have been pursued, among which the application of mechanical stresses, allowed by the incredible mechanical robustness and flexibility of these atomically thin materials. Great experimental and theoretical efforts have been focused on the development of straining protocols and on the evaluation of their impact on the peculiar properties of 2D crystals, revealing a novel, alluring physics. The relevance held by strain for 2D materials is introduced in Sec. I. Sections II and III present the multiplicity of methods developed to induce strain, highlighting the peculiarities, effectiveness, and drawbacks of each technique. Strain has largely widened the 2D material phase space in a quasi-seamless manner, leading to new and rich scenarios, which are discussed in Secs. IV-VI of this work. The effects of strain on the electronic, optical, vibrational, and mechanical properties of 2D crystals are discussed, as well as the possibility to exploit strain gradients for single-photon emission, non-linear optics, or valley/spintronics. Quantitative surveys of the relevant parameters governing these phenomena are provided. This review seeks to provide a comprehensive state-of-the-art overview of the straining methods and strain-induced effects, and to shed light on possible future paths. The aims and developments, the tools and strategies, and the achievements and challenges of this research field are widely presented and discussed.

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“…19 In addition to the ability to tune the electronic properties of the monolayer MoS 2 , the applied strain was found to modify the photoluminescence (PL) intensity. The PL maximum peak of the monolayer MoS 2 exhibited a blue shi 20,21 at the rate of approximately 20 meV GPa À1 . At the pressure of 25 GPa, both real and imaginary parts of the dielectric function were shied to red, and the peak height increases correspondence with an enhancement of the optical absorption.…”

Section: Introductionmentioning

confidence: 99%

Electronic and optical properties of monolayer MoS₂under the influence of polyethyleneimine adsorption and pressure

Chihaia

Pham-Ho

et al. 2020

RSC Adv.

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Thickness-dependent phase transition and optical behavior of MoS2 films under high pressure

Cited by 34 publications

References 46 publications

N-type and p-type molecular doping on monolayer MoS₂

N-type and p-type molecular doping on monolayer MoS₂

Strain-tuning of the electronic, optical, and vibrational properties of two-dimensional crystals

Electronic and optical properties of monolayer MoS₂under the influence of polyethyleneimine adsorption and pressure

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Thickness-dependent phase transition and optical behavior of MoS2 films under high pressure

Cited by 34 publications

References 46 publications

N-type and p-type molecular doping on monolayer MoS2

N-type and p-type molecular doping on monolayer MoS2

Strain-tuning of the electronic, optical, and vibrational properties of two-dimensional crystals

Electronic and optical properties of monolayer MoS2under the influence of polyethyleneimine adsorption and pressure

Contact Info

Product

Resources

About

N-type and p-type molecular doping on monolayer MoS₂

N-type and p-type molecular doping on monolayer MoS₂

Electronic and optical properties of monolayer MoS₂under the influence of polyethyleneimine adsorption and pressure