Nanoscale Transition Metal Dichalcogenides: Structures, Properties, and Applications

Sorkin, V.; Pan, Hui; Shi, Hongliang; Quek, Su Ying; Zhang, Yong‐Wei

doi:10.1080/10408436.2013.863176

Cited by 146 publications

(90 citation statements)

References 219 publications

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“…There are two possible contributions to the changes in the electronic structures at the MoS 2 edges. One is an intrinsic modification of the electronic properties at the edge sites due to the broken periodicity, that is, edge-dependent semiconducting-to-metallic transition for MoS 2 , as predicted by theoretical calculations 22,45 . The other contribution is from the guest adsorbates that are often observed ARTICLE at the edge sites due to their higher chemical reactivity.…”

Section: Resultsmentioning

confidence: 99%

Bandgap tunability at single-layer molybdenum disulphide grain boundaries

et al. 2015

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Two-dimensional transition metal dichalcogenides have emerged as a new class of semiconductor materials with novel electronic and optical properties of interest to future nanoelectronics technology. Single-layer molybdenum disulphide, which represents a prototype two-dimensional transition metal dichalcogenide, has an electronic bandgap that increases with decreasing layer thickness. Using high-resolution scanning tunnelling microscopy and spectroscopy, we measure the apparent quasiparticle energy gap to be 2.40±0.05 eV for single-layer, 2.10±0.05 eV for bilayer and 1.75±0.05 eV for trilayer molybdenum disulphide, which were directly grown on a graphite substrate by chemical vapour deposition method. More interestingly, we report an unexpected bandgap tunability (as large as 0.85 ± 0.05 eV) with distance from the grain boundary in single-layer molybdenum disulphide, which also depends on the grain misorientation angle. This work opens up new possibilities for flexible electronic and optoelectronic devices with tunable bandgaps that utilize both the control of two-dimensional layer thickness and the grain boundary engineering.

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Section: Resultsmentioning

confidence: 99%

Bandgap tunability at single-layer molybdenum disulphide grain boundaries

et al. 2015

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“…Nowadays, there is a tremendous scientific interest in layered materials, not only graphene, but also bismuth telluride, indium selenide, gallium selenide, molybdenum disulfide, and many other materials [Sorkin (2014)]. Raman is a suitable technique to analyze a few layers of materials and distinguish in many cases how many layers we have.…”

Section: Analisis Of a Few Layers Materialsmentioning

confidence: 99%

Raman Scattering Applied to Materials Science

Cantarero

2015

Procedia Materials Science

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One of the most powerful techniques to extract physical and chemical information of a material is the light scattering. Opposite to x-ray scattering for instance, where an average of the sample properties is obtained, Raman scattering is a local probe which can be used to detect inhomogeneities, local strain, lack of crystallinity, anharmonicities or information on the electronic structure by means of resonant Raman scattering. In this work, we will analyze the main contributions of Raman scattering in Materials Sciences. After a brief introduction of the technique and the equipment needed for the physical measurements, we will give practical examples of Raman scattering measurements applied to a number of materials and the valuable information obtained in every example.

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“…This wide and diversified class of inorganic materials has been the topic of several contributions, addressing their synthesis and characterisation , functionalisation [37][38][39][40], surface chemistry and eventually applications [1,[6][7][8][9][10][11]15,27,30,33,35,[41][42][43][44][45][46][47][48][49]. Nanocrystals present features which are different from those of bulk materials, particularly at the surface.…”

Section: Introductionmentioning

confidence: 99%

Functionalisation of Colloidal Transition Metal Sulphides Nanocrystals: A Fascinating and Challenging Playground for the Chemist

2017

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Abstract:Metal sulphides, and in particular transition metal sulphide colloids, are a broad, versatile and exciting class of inorganic compounds which deserve growing interest and attention ascribable to the functional properties that many of them display. With respect to their oxide homologues, however, they are characterised by noticeably different chemical, structural and hence functional features. Their potential applications span several fields, and in many of the foreseen applications (e.g., in bioimaging and related fields), the achievement of stable colloidal suspensions of metal sulphides is highly desirable or either an unavoidable requirement to be met. To this aim, robust functionalisation strategies should be devised, which however are, with respect to metal or metal oxides colloids, much more challenging. This has to be ascribed, inter alia, also to the still limited knowledge of the sulphides surface chemistry, particularly when comparing it to the better established, though multifaceted, oxide surface chemistry. A ground-breaking endeavour in this field is hence the detailed understanding of the nature of the complex surface chemistry of transition metal sulphides, which ideally requires an integrated experimental and modelling approach. In this review, an overview of the state-of-the-art on the existing examples of functionalisation of transition metal sulphides is provided, also by focusing on selected case studies, exemplifying the manifold nature of this class of binary inorganic compounds.

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Nanoscale Transition Metal Dichalcogenides: Structures, Properties, and Applications

Cited by 146 publications

References 219 publications

Bandgap tunability at single-layer molybdenum disulphide grain boundaries

Bandgap tunability at single-layer molybdenum disulphide grain boundaries

Raman Scattering Applied to Materials Science

Functionalisation of Colloidal Transition Metal Sulphides Nanocrystals: A Fascinating and Challenging Playground for the Chemist

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