Arrays of semiconductor nanowires are of potential interest for applications including photovoltaic devices and IR detectors/imagers. While nominally uniform arrays have typically been studied, arrays containing nanowires with multiple diameters and/or random distributions of diameters could allow tailoring of the photonic properties of the arrays. In this Letter, we demonstrate the growth and ...

this paper is the first multi-scale characterization of the fluidize-dried gum extracted from the fresh fruits of the plant abelmoschus esculentus. it describes the physical, thermal, sorptional and functional properties of this natural gum. elemental analysis, scanning electron microscopy (sem), particle size analysis, x-ray powder diffraction (xprd), thermo-gravimetric analysis (tga), differe...

The translucency of comparable shades of five dental porcelains was determined. Both direct transmittance and total transmittance were measured at wavelengths of 400-700 nm. For 1 mm of porcelain, the values for direct transmittance were low and averaged 0.13 percent, whereas the values for total transmittance averaged 26.8 percent. Transmittance increased with increasing incident wavelength. T...

Fouling is a ubiquitous and longstanding challenge that causes both economic environmental problems, especially for underwater detection equipment, as fouling directly limits the normal services functions of such equipment. Therefore, it necessary to develop coatings with high transparency good antifouling performance. Herein, novel zwitterion compound was synthesized, an coating excellent comp...

Abstract This paper discuss the optical parameters of tin oxide nanopowder prepared by sol-gel method. Tin shows 81 % transmittance in near IR region. In this region, highest reflectance, %. The band gap was 3.43 eV. cut-off wavelength is 362.15 nm. refractive index and extinction coefficient were calculated. real imaginary values dielectric constants calculated value constant higher than const...

Nonlinear infrared (IR) crystals for radiation conversion are of paramount importance realization advanced laser spectrometers medical diagnostics, environmental monitoring, and sensing. However, performance such suffers from substantial surface reflectivity coming rather high (over 2.5) refractive index the key nonlinear materials used. Here, based on example promising BaGa4Se7 crystal, we att...

Laropal® A81 is a urea-aldehyde resin used as varnish for paintings requiring 30%–40% of aromatic solvents to be dissolved. Considering the dangers environment and health, an attempt was made replace them with less impactful low-toxic solvents. The present research investigates new formulation aliphatic hydrocarbons esters (isobutyl isobutyrate, IBIB) alternative traditional aromatics mixture. ...

Highly transparent, energy-saving, and superhydrophobic nanostructured SiO2/VO2 composite films have been fabricated using a sol-gel method. These composite films are composed of an underlying infrared (IR)-regulating VO2 layer and a top protective layer that consists of SiO2 nanoparticles. Experimental results showed that the composite structure could enhance the IR light regulation performanc...

In this study, a lightweight composite polyimide film optic with antireflective coating was prepared using an ion-beam-assisted reactive sputtering method. It exhibited high transmittance in visible (87%, 0.5~0.8 μm), short (86%, 1.8~2.7 μm) and middle (78%, 3.3~5.4 wavelength infrared regions. Additionally, it also showed great optical homogeneity (0.006 λ RMS 0.034 PV, = 632.8 nm) smooth surf...