A high performance solar absorber using a 2D tantalum superlattice photonic crystal (PhC) is proposed and its design is optimized for high-temperature energy conversion. In contrast to the simple lattice PhC, which is limited by diffraction in the short wavelength range, the superlattice PhC achieves solar absorption over broadband spectral range due to the contribution from two superposed latt...

Melting of crystalline solids ~superlattices! of octadecanethiol and octanethiol protected silver clusters has been studied with x-ray powder diffraction ~XRD!, differential scanning calorimetry ~DSC!, and infrared ~IR! spectroscopy. These solids have been compared with the silver thiolate layered compounds in view of their similarity in alkyl chain packing and x-ray diffraction patterns. Super...

We report novel superlattice wave patterns at the interface of a fluid layer driven vertically. These patterns are described most naturally in terms of two interacting hexagonal sublattices. Two frequency forcing at very large aspect ratio is utilized in this work. A superlattice pattern ("superlattice-I") consisting of two hexagonal lattices oriented at a relative angle of 22o is obtained with...

The nonequilibrium molecular dynamics (NEMD) method has been used to calculate the lattice thermal conductivities of Ar and Kr/Ar nanostructures in order to study the effects of interface scattering, boundary scattering, and elastic strain on lattice thermal conductivity. Results show that interface scattering poses significant resistance to phonon transport in superlattices and superlattice na...

A symmetry-breaking order-disorder transition of the Ising type is found in a nonequilibrium surface reaction model for CO oxidation incorporating superlattice ordering of adsorbed oxygen. We relate this transition to the percolation of superlattice domains of oxygen, and discuss the consequences for chemical diffusion of coadsorbed CO. The latter constitutes a new type of problem involving tra...

The ion-beam channeling technique has been used to characterize the interface and the first few layers of [100] GaSb/AlSb superlattice structures. Strain caused by alternating tensile and compressive stress has been detected by measuring the oscillation of the )110]-aligned direction with depth. From the angular displacement and its oscillation, the amount of strain in the superlattice has been...

0.1016/j.nanoen.2 lsevier Ltd. All rig thors. [email protected] Abstract Vertically stacked artificial 2D materials, such as van der Waals heterostructures, hold great scientific and technological promise. Stacking 2D atomic layers with stronger electrostatic forces in a controlled fashion could be more challenging. Positively charged atomic sheets of layered double hydroxide (LDH) such as hydrot...

Passive mode-locking is achieved in two sectional lasers with an active layer based on superlattice formed by ten layers of quantum dots. Tunnel coupling of ten layers changes the structural polarization properties: the ratio between the transverse electric and transverse magnetic polarization absorption coefficients is less by a factor of 1.8 in the entire electroluminescence spectrum range fo...

Transmission of electromagnetic fields through (dielectric/metallic)n superlattices, for frequencies below the plasma frequency ωp, is a subtle and important topic that reviewed further developed here. Recently, an approach metallic superlattices based on theory finite periodic systems was published. Unlike most, if not all, published approaches are valid in n→∞ limit, any value n, allows one t...