Structural and Electronic Properties of Low-Dimensional C-Nanoassemblies and Possible Analogues for Si (and Ge)

March, N. H.; Rubio, Ángel

doi:10.1155/2011/932350

Cited by 4 publications

(3 citation statements)

References 75 publications

(111 reference statements)

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“…Monolayer crystals, as thin as a single atomic sheet, represent a versatile source of novel two-dimensional materials with intriguing physical properties, possibly useful in many frontend technologies such as nano-/opto-electronics, energetics and nanomechanics. The experimental search, synthesis and characterization of such low-dimensional materials, as well as the theoretical investigation of their properties, is a very active and lively field of modern nanoscience (see for instance [82][83][84][85][86][87][88][89] and references therein). Above all, graphene (i.e.…”

Section: Nonlinear Elasticity Of Two-dimensional Atomic Sheetsmentioning

confidence: 99%

Nonlinear elasticity in nanostructured materials

Colombo

Giordano

2011

Rep. Prog. Phys.

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We elaborate on a blended continuum/atomistic theoretical picture of the nonlinear elastic properties of nanostructured materials, looking at diverse aspects such as dispersions of inhomogeneities within a matrix, random or graded nanograined materials, two-dimensional atomic sheets. In particular, we discuss the possible onset of length-scale effects and we establish the limits and merits of continuum versus atomistics. While most situations here discussed correspond to model systems, the main conclusions have a paradigmatic relevance and indeed apply to most nanomaterials of current interest. This article was invited by S Washburn.

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Section: Nonlinear Elasticity Of Two-dimensional Atomic Sheetsmentioning

confidence: 99%

Nonlinear elasticity in nanostructured materials

Colombo

Giordano

2011

Rep. Prog. Phys.

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“…In the meantime, substantial progress has been made over the recent years in the application of ab initio studies in determining geometry-dependent properties of low-dimensional nanostructures important for sensors [ 42 , 43 , 44 ]. Some recent examples of this type include nanowire-based sensors [ 45 ], specifically gas/chemical sensors [ 46 ], photodetectors [ 47 ], and (field-effect transistor) FET-sensors [ 48 ].…”

Section: Low-dimensional Nanostructures and Sensorsmentioning

confidence: 99%

Coupled Multiphysics Modelling of Sensors for Chemical, Biomedical, and Environmental Applications with Focus on Smart Materials and Low-Dimensional Nanostructures

Singh

Melnik

2022

Chemosensors

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Low-dimensional nanostructures have many advantages when used in sensors compared to the traditional bulk materials, in particular in their sensitivity and specificity. In such nanostructures, the motion of carriers can be confined from one, two, or all three spatial dimensions, leading to their unique properties. New advancements in nanosensors, based on low-dimensional nanostructures, permit their functioning at scales comparable with biological processes and natural systems, allowing their efficient functionalization with chemical and biological molecules. In this article, we provide details of such sensors, focusing on their several important classes, as well as the issues of their designs based on mathematical and computational models covering a range of scales. Such multiscale models require state-of-the-art techniques for their solutions, and we provide an overview of the associated numerical methodologies and approaches in this context. We emphasize the importance of accounting for coupling between different physical fields such as thermal, electromechanical, and magnetic, as well as of additional nonlinear and nonlocal effects which can be salient features of new applications and sensor designs. Our special attention is given to nanowires and nanotubes which are well suited for nanosensor designs and applications, being able to carry a double functionality, as transducers and the media to transmit the signal. One of the key properties of these nanostructures is an enhancement in sensitivity resulting from their high surface-to-volume ratio, which leads to their geometry-dependant properties. This dependency requires careful consideration at the modelling stage, and we provide further details on this issue. Another important class of sensors analyzed here is pertinent to sensor and actuator technologies based on smart materials. The modelling of such materials in their dynamics-enabled applications represents a significant challenge as we have to deal with strongly nonlinear coupled problems, accounting for dynamic interactions between different physical fields and microstructure evolution. Among other classes, important in novel sensor applications, we have given our special attention to heterostructures and nucleic acid based nanostructures. In terms of the application areas, we have focused on chemical and biomedical fields, as well as on green energy and environmentally-friendly technologies where the efficient designs and opportune deployments of sensors are both urgent and compelling.

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“…Several ab-initio calculations [4][5][6], many body theory [28], quantum chemical calculations and insights [29][30][31][32][33][34] are available for silicene. Interestingly there is a differing view, which has not been well appreciated.…”

Section: Introductionmentioning

confidence: 99%

Silicene and Germanene as Prospective Playgrounds for Room Temperature Superconductivity

Baskaran

2018

Many-Body Approaches at Different Scales

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Combining theory and certain striking phenomenology we suggest that silicene and germanene are elemental Mott insulators and abode of doping induced high Tc superconductivity. In our theory, a 3 fold reduction in silicene π-π * band width, in comparison to graphene, and short range coulomb interactions enable Mott localization. Recent experimental results are invoked to provide support for our Mott insulator model: i) a significant π-band narrowing, in silicene on ZrB2 seen in ARPES, ii) a superconducting gap appearing below 35 K with a large 2∆ k B T c ∼ 20 in silicene on Ag, iii) emergence of electron like pockets at M points, on electron doping by Na adsorbent, iv) certain coherent quantum oscillation like features exhibited by silicene transistor at room temperatures and v) absence of Landau level splitting upto 7 Tesla and vi) superstructures, not common in graphene but, ubiquitous in silicene. A synthesis of the above results using theory of Mott insulator, with and without doping, is attempted. We surmise that if competing orders are taken care of and optimal doping achieved, superconductivity in silicene and germanene could reach room temperature scales; our estimates of model parameters, t and J ∼ 1 eV, are encouragingly high, compared to cuprates.

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Structural and Electronic Properties of Low-Dimensional C-Nanoassemblies and Possible Analogues for Si (and Ge)

Cited by 4 publications

References 75 publications

Nonlinear elasticity in nanostructured materials

Nonlinear elasticity in nanostructured materials

Coupled Multiphysics Modelling of Sensors for Chemical, Biomedical, and Environmental Applications with Focus on Smart Materials and Low-Dimensional Nanostructures

Silicene and Germanene as Prospective Playgrounds for Room Temperature Superconductivity

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