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Showing 1 to 20 of 21 for “"2D Crystals"”.
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Probing valley and magnetic photoexcitations in 2D crystals and their heterostructures
… Understanding the optical response of 2D layered materials and their heterostructures at the atomically thin limit is an important aspect of this field. Photoexcitations, such as excitons, critically impact future optoelectronic technologies, such as next-generation solar cells, …
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On the Impact and Growth of Plasma-enhanced Atomic Layer Deposition High- Dielectrics on 2D Crystals
… materials for MOSFETs are two-dimensional (2D) materials, such as transition metal dichalcogenides (TMDs) and black phosphorus (BP). 2D field-effect transistors (FETs) benefit from the atomic thinness of these materials, allowing them to be aggressively scaled down while avoiding short …
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Magic angle spinning NMR applied to membrane protein 2D crystals : the structure and function of VDAC
… of VDAC in lipid bilayer two-dimensional (2D) crystals. A strategy combining specific isotopic labeling with advanced 3D heteronuclear experiments enabled assignment of a large extent of the primary sequence. Extensive assignments of VDAC in lipid bilayers permitted comparison of VDAC's …
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Material and device aspects of semiconducting two-dimensional crystals
<p>Two-dimensional (2D) crystals have attracted much attention in recent years due to their unique physical, chemical, and mechanical properties. Semiconducting 2D crystals with van der Waals structures, such as transition metal dichalcogenides, are considered promising candidates for future device …
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Device Physics of Two-Dimensional Crystalline Materials
The study of two-dimensional (2D) electrons in condensed matter physics has two milestones: quantum Hall effects in semiconductor heterostructures and superconductivity in cuprates. In both, the 2D electrons are embedded in complex material structures. The discovery of graphene allows for the …
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Two-dimensional crystals : spectroscopy and electronic applications
… thin and mechanically robust two-dimensional (2D) crystals, starting with graphene, has unveiled new possibilities for next generation of ultrafast and ubiquitous electronics. One critical distinction between 2D crystals and 3D crystals is that 2D crystals are all-surface materials. Therefore, …
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Sample preparation of membrane proteins suitable for solid-state MAS NMR and development of assignment strategies
… microscopy, require highly diffracting 3D or 2D crystals, respectively. Today, structure determination of non-crystalline solid protein preparations has been made possible through rapid progress of solid-state MAS NMR methodology for biological systems. Castellani et. al. solved and refined …
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Dynamical behavior of graphene models
… and Peierls had predicted that twodimensional (2D) crystals were thermodynamically unstable. Andre Geim and Konstantin Novoselov managed to obtain graphene using a rather surprising technique called the scotch tape method. The scotch tape method involves carefully peeling off layer after layer …
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Molecular assemblies observed by atomic force microscopy
… structures with a resolution approaching that of 2D crystals. Finally, the contribution of specific amino acid residues to the stability of membrane proteins was studied. Two structurally similar proteins sharing only 30% sequence identity were compared. Single-molecule atomic force microscopy and …
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Electronic devices based on 2D material: fabrication, characterization and analysis
Two-dimensional (2D) crystals are layered materials with strong in-plane covalent bonding and weak Van der Waals interlayer coupling. Stable 2D materials range from insulators, to semiconductors, to metals and even superconductors. Compared to their bulk counterparts, 2D materials show many …
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Nanoscale Engineering for Mixed-Dimensional Heterostructure Growth and Integration
… heterostructures of distinct twodimensional (2D) crystals has opened new avenues for research, from the fundamental studies of emergent phenomena to the development of practical applications with unique functionalities, which are attributed to a wide variety of configurations attainable with …
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High-pressure studies of atomically-thin van der Waals materials
Two-dimensional (2D) materials and Moiré superlattices formed by certain stacking configurations of 2D crystals, represent a new frontier for quantum matter research due the emergent properties associated to their reduced dimensionality and tunability. To glean insight into the physics of these …
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Visible and Infrared Light Detection Using 2D Materials
Two-dimensional (2D) materials such as graphene and transition metal dichalcogenides (TMDs) open up the potential for pushing electronic devices, from transistors to photovoltaics, to the atomic limit. In particular, many transition metal dichalcogenides such as tungsten diselenide (WSe₂) have …
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High-field transport in two-dimensional graphene and molybdenum disulfide
… that of atomically-thin two-dimensional (2D) crystals such as graphene and molybdenum disulfide (MoS2). The excellent electrical and thermal properties of 2D materials like graphene have attracted much attention for potential applications in integrated-circuit technology. Understanding …
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Biomimetic membranes as new materials for applications in envrionmental engineering and biology
… However, this method led to creation of flat 2D or thin 3D crystals of AqpZ in a polymer matrix as confirmed by electron diffraction. This indicates that the packing efficiency of these polymer-based systems is extremely high. Additionally, such crystals have the potential to allow for …
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A Study of the Membrane Binding Properties of the Matrix Protein from Human Respiratory Syncytial Virus
… used in several experiments. Efforts to produce 2D crystals of the M protein by incubation with lipid and detergent were unsuccessful, but in several detergent-free incubations, particularly where the lipid DPPE was included, extended helical structures were formed that bore a striking …
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Ordered photonic microstructures
… and polystyrene latex colloidal particles into 2D crystals is presented. The colloidal assemblies offer a relatively easy processing route for fabrication of photonic bandgap structures. Large (> 1 mm diameter) single crystal grains of colloids were formed using controlled evaporation and fluid …
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Electron cryomicroscopy structures of respiratory supercomplexes from alphaproteobacteria suggest mechanisms to enhance catalysis and to prevent deactivation of respiratory complex I
… lipid-mediated interactions, reminiscent of 2D crystals of bacteriorhodopsin. Despite this minimal protein-interaction interface, the bacterial structures bear a striking resemblance with the mammalian counterparts, shedding light on the evolutionary origins of eukaryotic supercomplexes. The …
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Nanoscale Characterisation of Heterointerfaces in 2D Materials
… 2]. As materials which naturally exist as 3D crystals, thinning them means detrimental surface effects become more and more dominant. Therefore, to continue pushing device performance, a new class of materials must be used, one that intrinsically lends itself to miniaturisation. Layered …
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Size dependence and odd/even effect in the melting of 2D lamellar crystals
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