Phosphorene quantum dots

Vishnoi, Pratap; Mazumder, Madhulika; Barua, Manaswee; Pati, Swapan K.; Rao, C. N. R.

doi:10.1016/j.cplett.2018.03.069

Cited by 33 publications

(23 citation statements)

References 19 publications

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“…In addition, the morphology of phosphorene was found to be directly affected by adjusting the applied current densities. If we increase or decrease the current density of the electrochemical exfoliation of BP, which accelerates or decreases the oxidation rate accordingly, we can also obtain phosphorene quantum dots 26 or phosphorene nanosheets. This is due to the O 2 concentrations that are directly proportional to the current density (Supplementary Fig.…”

Section: Resultsmentioning

confidence: 99%

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Unzipping of black phosphorus to form zigzag-phosphorene nanobelts

et al. 2020

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Phosphorene, monolayer or few-layer black phosphorus, exhibits fascinating anisotropic properties and shows interesting semiconducting behavior. The synthesis of phosphorene nanosheets is still a hot topic, including the shaping of its two-dimensional structure into nanoribbons or nanobelts. Here we report electrochemical unzipping of single crystalline black phosphorus into zigzag-phosphorene nanobelts, as well as nanosheets and quantum dots, via an oxygen-driven mechanism. The experimental results agree well with our theoretical calculations. The calculation for the unzipping mechanism study suggests that interstitial oxygen-pairs are the critical intermediate species for generating zigzag-phosphorene nanobelts. Although phosphorene oxidation has been reported, lengthwise cutting is hitherto unreported. Our discovery of phosphorene cut upon oxidation represents a previously unknown mechanism for the formation of various dimensions of phosphorene nanostructures, especially zigzag-phosphorene nanobelts. It opens up a way for studying the quantum effects and electronic properties of zigzag-phosphorene nanobelts.

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Section: Resultsmentioning

confidence: 99%

“…1 and Supplementary Fig. 1c ) and phosphorene quantum dots 26 (Supplementary Fig. 1d, e ), only by changing the current densities.…”

Section: Introductionmentioning

confidence: 97%

Unzipping of black phosphorus to form zigzag-phosphorene nanobelts

et al. 2020

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“…have demonstrated that N ‐methyl‐2‐pyrrolidone (NMP) can be used as a solvent to prepare phosphorene by bath ultrasonication . Subsequently, various other organic solvents including dimethylformamide (DMF), dimethyl sulfoxide (DMSO), N ‐cyclohexyl‐2‐pyrrolidone (CHP), isopropyl alcohol (IPA), benzonitrile, and toluene, have been chosen to produce uniform and stable phosphorene dispersions in high yields. Guo et al .…”

Section: Synthesis Structure and Propertymentioning

confidence: 99%

2D Elemental Nanomaterials Beyond Graphene

2019

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Graphene is a well‐known 2D material with potential applications. In recent years, 2D materials of other elements have come to the fore. These are borophene in group III, silicene, germanene and stanene in group IV and phosphorene, arsenene, antimonene and bismuthene in group V. In this article, we discuss the synthesis, structure and properties of the elemental 2D materials beyond graphene. Of the various elemental 2D materials, borophene, silicene and phosphorene are interesting in terms of stability and properties leading to possible applications. We have described potential applications of other 2D materials as well.

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“…In this paper, we aim to investigate the effect of twisting angle on the energy levels of a circular QD in tBLG. QDs have been studied extensively in different two-dimensional (2D) materials, i.e., monolayer, bilayer, and fewlayer graphene [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20] , transition metal dichalcogenides [21][22][23] , hexagonal boron nitride 24,25 , phosphorene 26,27 , and etc. Among QDs in 2D materials, graphene-based QDs (geometry or gate induced) with desirable properties for applications have been received particular interest [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][28][29][30][31][32][33][34]…”

Section: Introductionmentioning

confidence: 99%

Circular quantum dots in twisted bilayer graphene

2020

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Within a tight binding approach, we investigate the effect of twisting angle on the energy levels of circular bilayer graphene (BLG) quantum dots (QDs) in both the absence and presence of a perpendicular magnetic field. The QDs are defined by an infinite-mass potential, so that the specific edge effects are not present. In the absence of magnetic field (or when the magnetic length is larger than the moiré length), we show that the low-energy states in twisted BLG QDs are completely affected by the formation of moiré patterns, with a strong localization at AA-stacked regions. When magnetic field increases, the energy gap of an untwisted BLG QD closes with the edge states, localized at the boundaries between the AA-and AB-stacked spots in a twisted BLG QD. Our observation of the spatial localization of the electrons in twisted BLG QDs can be experimentally probed by the low-bias scanning tunneling microscopy (STM) measurements.

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Phosphorene quantum dots

Cited by 33 publications

References 19 publications

Unzipping of black phosphorus to form zigzag-phosphorene nanobelts

Unzipping of black phosphorus to form zigzag-phosphorene nanobelts

2D Elemental Nanomaterials Beyond Graphene

Circular quantum dots in twisted bilayer graphene

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