The measurement of the microwave absorptivity of materials typically requires expensive and arcane equipment and methods. I show that, for moderately absorbing materials (loss tangent δ ' 0.005 or higher), useful measurements can be easily made using a thermometer and a normal domestic microwave oven: the heat absorbed for suitably designed sample size and geometry relates directly to the absor...

Solar energy is a significant, environment-friendly source of renewable energy. The solar absorber transforms radiation into heat as an effective green source. Therefore, increasing its absorbing capacity can improve absorber’s effectiveness. This paper proposes tungsten tantalum alloy with silicon dioxide (WTa-SiO2) ceramic layer-based system two different metasurfaces to enhance absorptivity ...

W ith protein biologics, it is critical to accurately determine an absorptivity constant. The constant is then used when routinely measuring protein concentration by ultraviolet (UV) spectrophotometry. The yield of product during manufacture and the product content and potency on the label are dependent on this constant. There have been several approaches in the past to determining the constant...

The rational improvement of photophysical properties can be highly valuable for the discovery of novel organic fluorophores. Using our new design strategy guided by the oscillator strength, we developed a series of full-color-tunable furoindolizine analogs with improved molar absorptivity through the fusion of a furan ring into the indolizine-based Seoul fluorophore. The excellent correlation b...

[1] Ontario Lacus is the largest and best characterized lake in Titan’s south polar region. In June and July 2009, the Cassini RADAR acquired its first Synthetic Aperture Radar (SAR) images of the area. Together with closest approach altimetry acquired in December 2008, these observations provide a unique opportunity to study the lake’s nearshore bathymetry and complex refractive properties. Av...

Abstract The evolution of nanofluids over the years has opened new research opportunities in field renewable energy. Research on optical properties for application direct absorption solar collectors (DASCs) is progressing at a burgeoning speed. In DASC system, nanofluid with high absorptivity can convert incident energy into thermal fluid. dispersed nanoparticles fluid act process through pheno...

Broadband perfect absorbers in the visible region have attracted considerable attention many fields, especially solar thermophotovoltaic and energy harvesting systems. However, developing light with high absorptivity, thermal stability, a broad bandwidth remains great challenge. Here, we theoretically experimentally demonstrate that titanium nitride metasurface absorber exhibits broadband absor...

Abstract High optical absorptivity or a large absorption cross-section is necessary to fully utilize the irradiation of light for photothermal heating. Recently, titanium nitride (TiN) nanostructures have been demonstrated be robust absorbers in range owing their nonradiative decay processes enhanced by broad plasmon resonances. Because photothermally generated heat dissipates surroundings, sup...