Strain-induced band modulation and excellent stability, transport and optical properties of penta-MP<sub>2</sub> (M = Ni, Pd, and Pt) monolayers

Kumar, Vipin; Roy, Debesh R.

doi:10.1039/d0na00503g

Cited by 12 publications

(2 citation statements)

References 80 publications

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“…In the aspect of theory, DFT calculation revealed that uniaxial and biaxial strains can open up the bandgap of penta‐MP 2 (M = Ni, Pd, and Pt) monolayers. [ 184 ] The uniaxial tensile strain further reduced the structural symmetry of the pentagonal lattice, inducing anisotropic optical absorption. A study in GeP shows that the tensile strain is always more effective in modulating the optical anisotropy than the compressive strain, regardless of its direction.…”

Section: Modulation Of Optical Anisotropymentioning

confidence: 99%

Review of Anisotropic 2D Materials: Controlled Growth, Optical Anisotropy Modulation, and Photonic Applications

Liu

et al. 2021

Laser & Photonics Reviews

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Anisotropic 2D materials are promising building blocks for future photonic and optoelectronic devices due to their low structural symmetry and in-plane optical anisotropy. This review systematically summarizes the crystalline structure, growth dynamics, optical anisotropy and their modulation strategies, and the corresponding photonic applications for emerging anisotropic 2D materials. First, the physical properties and crystalline structures of typical anisotropic 2D materials are briefly introduced. After that, special attention is paid to the growth mechanism of low-symmetry lattices, where the competition between different growth modes determines the crystal morphologies. Then, the physical principles of anisotropic optical absorption, photoluminescence, Raman scattering, photodetection, and nonlinear response are discussed based on recent scientific advances. The discussion on the techniques to modify the intrinsic in-plane anisotropy, along with the possibility of introducing optical anisotropy to the isotropic materials, add a new degree of freedom to the control over their optical properties. The review of application prospects also helps bridge the gap between the scientific exploration of novel anisotropic materials and the development of polarization-sensitive photonic devices. The discussions in this review will push forward the scientific frontier in the crystalline growth and anisotropy control of anisotropic 2D materials.

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Section: Modulation Of Optical Anisotropymentioning

confidence: 99%

Review of Anisotropic 2D Materials: Controlled Growth, Optical Anisotropy Modulation, and Photonic Applications

Liu

et al. 2021

Laser & Photonics Reviews

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“…Here E(Ø) and EF are the electrostatic potential and Fermi level of the given system. The charge density difference was modelled by VESTA software [42,43].…”

Section: Dft Calculationsmentioning

confidence: 99%

Unfolding the hydrogen gas sensing mechanism across 2D Pnictogen/Graphene heterostructure sensors

Kumar¹,

Jasani

Sonvane

et al. 2023

Preprint

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Hydrogen as a source of clean and future alternative to fossil fuels demands a class of powerful gas sensor technologies. To this end, we have developed unique bi-stacked heterogeneous layers based on 2D Pnictogens and graphene sheets via photolithography and pattern transfer methods. The nanoengineered heterostructure morphology consists of truncated/hexagonal antimonene flakes dispersed on graphene sheets. Amongst the Pnictogen class, the hybrid antimonene-graphenes (Sb/G) demonstrated excellent sensing behavior characterized by a large gas response to H2 (~4-fold improvement), high selectivity, fast response/recovery times (>3 fold reduction), and ultra-low limit of detection (LOD: 0.05 ppm) in comparison to pristine sensors. The microstructural and density functional theory (DFT) calculations demonstrated a Bader charge transfer mechanism from Sb/G heterojunction to the H2 gas, which modulated the Schottky barrier and improved gas response. The outstanding performance of the Sb/G sensor places it amongst the highly selective and fast hydrogen sensors based on the Pnictogen-graphene family.

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Outstanding tunable electrical and optical characteristics in monolayer silicene at high terahertz frequencies

et al. 2022

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Strain-induced band modulation and excellent stability, transport and optical properties of penta-MP₂ (M = Ni, Pd, and Pt) monolayers

Abstract: First principle calculations utilizing the density-functional theory are carried out to investigated the electronic properties, transport, and optical properties of the Penta-MP2 (M=Ni, Pd, and Pt) monolayer compounds under the...

Cited by 12 publications

References 80 publications

Review of Anisotropic 2D Materials: Controlled Growth, Optical Anisotropy Modulation, and Photonic Applications

Review of Anisotropic 2D Materials: Controlled Growth, Optical Anisotropy Modulation, and Photonic Applications

Unfolding the hydrogen gas sensing mechanism across 2D Pnictogen/Graphene heterostructure sensors

Outstanding tunable electrical and optical characteristics in monolayer silicene at high terahertz frequencies

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Strain-induced band modulation and excellent stability, transport and optical properties of penta-MP2 (M = Ni, Pd, and Pt) monolayers

Abstract: First principle calculations utilizing the density-functional theory are carried out to investigated the electronic properties, transport, and optical properties of the Penta-MP2 (M=Ni, Pd, and Pt) monolayer compounds under the...

Cited by 12 publications

References 80 publications

Review of Anisotropic 2D Materials: Controlled Growth, Optical Anisotropy Modulation, and Photonic Applications

Review of Anisotropic 2D Materials: Controlled Growth, Optical Anisotropy Modulation, and Photonic Applications

Unfolding the hydrogen gas sensing mechanism across 2D Pnictogen/Graphene heterostructure sensors

Outstanding tunable electrical and optical characteristics in monolayer silicene at high terahertz frequencies

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Product

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Strain-induced band modulation and excellent stability, transport and optical properties of penta-MP₂ (M = Ni, Pd, and Pt) monolayers