An atlas of two-dimensional materials

Miró, Pere; Audiffred, Martha; Heine, Thomas

doi:10.1039/c4cs00102h

Cited by 1,304 publications

(938 citation statements)

References 128 publications

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“…[6][7][8][9][10][11] This is due to their exciting physical and chemical properties. TMDs have been deemed suitable (and in some cases game-changing) for potential applications in a variety of areas (catalysis, electronics, photonics, energy storage, and sensing).…”

Section: Introductionmentioning

confidence: 99%

Functionalization of Two‐Dimensional Transition‐Metal Dichalcogenides

2016

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Two-dimensional (2D) layered transition metal dichalcogenides (TMDs) are a fascinating class of nanomaterials that have the potential for application in catalysis, electronics, photonics, energy storage, and sensing. TMDs are rather inert, and thus pose problems for chemical derivatization. However, to further modify the properties of TMDs and fully harness their capabilities, routes towards their chemical functionalization must be identified. In this research news article we critically review recent efforts towards the chemical (bond-forming) functionalization of 2D TMDs.We highlight recent successes and also areas where further detailed analyses and experimentation are required. As detailed herein, this burgeoning field is very much in its infancy but has already provided several important breakthroughs. Graphical Abstract3

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Section: Introductionmentioning

confidence: 99%

Functionalization of Two‐Dimensional Transition‐Metal Dichalcogenides

2016

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“…The oxidized pellets of restacked single layers feature a magnetic transition at T N = 7 K in the in-plane direction, while the magnetic properties in the out-of-plane direction vastly differ from bulk α-RuCl 3 . The macro- Binary halide nanosheets have been predicted based on chemical intuition 3,4 or ab initio calculations. 7 Yet, no single layer halides have been synthesized so far, even though this class of compounds features an array of interesting electrical and magnetic properties.…”

Section: Introductionmentioning

confidence: 99%

Magnetic Properties of Restacked 2D Spin 1/2 honeycomb RuCl₃ Nanosheets

et al. 2016

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Spin 1 2 honeycomb materials have gained substantial interest due to their exotic magnetism and possible application in quantum computing. However, in all current materials out-of-plane interactions are interfering with the in-plane order, hence a true 2D magnetic honeycomb system is still of demand. Here, we report the exfoliation of the magnetic semiconductor α-RuCl 3 into the first halide monolayers and the magnetic characterization of the spin 1 2 honeycomb arrangement of turbostratically stacked RuCl 3 monolayers. The exfoliation is based on a reductive lithiation/hydration approach, which gives rise to a loss of cooperative magnetism due to the disruption of the spin 1 2 state by electron injection into the layers. After an oxidative treatment, cooperative magnetism similar to the bulk is restored. The oxidized pellets of restacked single layers feature a magnetic transition at T N = 7 K in the in-plane direction, while the magnetic properties in the out-of-plane direction vastly differ from bulk α-RuCl 3 . The macro- Binary halide nanosheets have been predicted based on chemical intuition 3,4 or ab initio calculations. 7 Yet, no single layer halides have been synthesized so far, even though this class of compounds features an array of interesting electrical and magnetic properties.The magnetic semiconductor α-RuCl 3 is one such example. While it was investigated in the past as a host for intercalants 8,9 and as a lithium ion conductor, 10 current research focuses on its magnetic properties. Due to its layered honeycomb structure of spin 1 2 Ru 3+ centers in combination with spin orbit coupling (SOC), it is one of the few known materials featuring a zigzag antiferromagnetic (AF) ground state below a temperature of T N1 = 8 K. [11][12][13] In the zigzag order, the magnetic moments form ferromagnetic (FM) zigzag chains, whose magnetization direction is opposed to the neighboring chains within the plane. Additionally, there is a further magnetic phase transition observed at T N2 = 14 K. The origin of this transition is currently still under debate. This type of ordering was first observed in Na 2 IrO 3 14-16 and explained by the Kitaev-Heisenberg model, 17,18 which describes that a frustrated spin 1 2 honeycomb arrangement could lead to a variety of interesting spin structures. Based on the competition among the exchange interactions up to the third neighbor, the system could possibly be pushed into a quantum spin liquid regime by the manipulation of the competing interactions, thereby opening up applications in quantum computing. 17,19 Yet, the Na + ions in the interlayer space of Na 2 IrO 3 lead to disadvantageous interactions between the iridate layers, which interfere with theoretical predictions of a honeycomb arrange-2 ment of spin 1 2 magnetic arrays. 20 Eliminating the interlayer interaction could provide a route to manipulate the spin structure of real materials featuring a spin 1 2 honeycomb arrangement. In RuCl 3 , where no charged ions are in between the honeycomb layers, the interlayer in...

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“…New two-dimensional crystals have been investigated intensively [1] and several of them have been successfully fabricated, such as hexagonal boron nitride [2][3][4], silicene [5][6][7][8], and a large family of layered transition metal dichalcogenides [9][10][11][12]. Recently, a single layer of phosphorus, named as black-phosphorene (black-P) has been exfoliated [13,14] and revealed as a new member of candidate materials for nanoelectronics applications [15][16][17][18][19] such as field-effect transistors [20,21], wide-range photodetectors [22,23], and high-performance lithium-ion batteries [24].…”

Section: Introductionmentioning

confidence: 99%

Promising thermoelectric properties of phosphorenes

Sevik

Sevinçli

2016

Nanotechnology

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Electronic, phononic, and thermoelectric transport properties of single layer black-and bluephosphorene structures are investigated with first-principles based ballistic electron and phonon transport calculations employing hybrid functionals. The maximum values of room temperature thermoelectric figure of merit, ZT corresponding to armchair and zigzag directions of blackphosphorene, ∼0.5 and ∼0.25, are calculated as rather smaller than those obtained with firstprinciples based semiclassical Boltzmann transport theory calculations. On the other hand, the maximum value of room temperature ZT of blue-phosphorene is predicted to be substantially high and remarkable values as high as 2.5 are obtained for elevated temperatures. Besides the fact that these figures are obtained at the ballistic limit, our findings mark the strong possibility of high thermoelectric performance of blue-phosphorene in new generation thermoelectric applications.

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An atlas of two-dimensional materials

Cited by 1,304 publications

References 128 publications

Functionalization of Two‐Dimensional Transition‐Metal Dichalcogenides

Functionalization of Two‐Dimensional Transition‐Metal Dichalcogenides

Magnetic Properties of Restacked 2D Spin 1/2 honeycomb RuCl₃ Nanosheets

Promising thermoelectric properties of phosphorenes

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An atlas of two-dimensional materials

Cited by 1,304 publications

References 128 publications

Functionalization of Two‐Dimensional Transition‐Metal Dichalcogenides

Functionalization of Two‐Dimensional Transition‐Metal Dichalcogenides

Magnetic Properties of Restacked 2D Spin 1/2 honeycomb RuCl3 Nanosheets

Promising thermoelectric properties of phosphorenes

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Magnetic Properties of Restacked 2D Spin 1/2 honeycomb RuCl₃ Nanosheets