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Near-infrared (NIR) luminescent materials have emerged as a growing field of interest, particularly for imaging and optics applications in biology, chemistry, and physics. ...
1. Background. Near infrared (NIR) region is a part of electromagnetic radiation with spectral range from 780 to 2500 nm [1].NIR energy with specific wavelengths can be partially absorbed by specific molecular bonds that consist of hydrogen e.g. C-H and O-H to become mechanical energy of molecular overtone and vibrations [2].The amount of this energy …
NEAR-INFRARED SORTING Visibly better detection: optical and spatial resolution of 3 to 8 mm State of the art camera-based NIR technology. NIR (near infrared technology) refers to a spectrum in a range between 760 and 2500 nm that is invisible to humans.
The NIR phosphor-converted light-emitting diode (NIR pc-LED) is a new near-infrared light source that has been widely studied. Among various NIR phosphors, Cr 3+ doped gadolinium aluminum gallium garnet (GAGG:Cr 3+) ceramic phosphor has shown great potential due to its ultra-high efficiency and thermal stability.Despite its capabilities, its detection range …
1 Introduction. Broadband light sources are essential to a variety of optical and photonic systems such as near-infrared (NIR) spectrometers, [] optical coherence tomography systems, [] and solar simulators. [] In particular, with the unprecedented penetration of portable and hand-held devices like smartphones, there is growing interest in miniaturizing the desktop …
The presence of optical heating may be checked using normalized spectra produced under low and high excitation laser power levels and at the same external temperature. In this way, the NIR spectra under different power levels were recorded for the Er 3+ (1.5 mol%):Yb 3+ (1.5 mol%) co-doped CaF 2 sample (see Fig. S3(a) in SI).
Anderson et al. have investigated the optical effects of the fabric with and without ceramic additives in the wavenumber from 3000–12,000 cm −1 and reported higher absorbance in fabrics with ...
1. Introduction. Staphylococcus aureus (S. aureus) is a common Gram-positive bacterium, that is hazardous and threatening not only for causing many infectious diseases but also in terms of producing toxins (enterotoxins), resulting in bacterial infections and food poisoning in humans [1], [2], [3], [4].The development of determination methods for S. aureus, such as …
A NIR GC photocatalyst is synthesized from fluorine-containing waste via in-situ etching of upconverted glass-ceramics. • The photocatalytic activity of photocatalyst is higher than most photocatalysts (including commercial P25 and BiOCl).. The photocatalyst characteristic by stable structure, regenerative, can be prepared on a large scale, and low cost.
The rewritable NIR luminescence in Eu-Bi glass was demonstrated through eight cycles of erasing recovery, achieved by employing repeated 473 nm laser irradiation and …
Keywords: near-infrared spectroscopy, stroke, motor recovery, cortical function, systemic review. Citation: Yang M, Yang Z, Yuan T, Feng W and Wang P (2019) A Systemic Review of Functional Near-Infrared Spectroscopy for Stroke: Current Application and Future Directions. Front. Neurol. 10:58. doi: 10.3389/fneur.2019.00058
To further evaluate the chemical composition, a schematic crystal structure of the Sc 3+ and Cr 3+ ion substitution process of the as-prepared NIR-PCs is presented in Fig. 2 (a). The Cr 3+ (0.069 nm, CN = 6) and Sc 3+ ions (0.075 nm, CN = 6) substituted the octahedral Al 3+ (0.053 nm, CN = 6) sites in the garnet matrix, and the Cr 3+ ions (0.069 nm, CN = 6) occupied …
It can be further subdivided into the near-infrared region (NIR) from about 750 nm to 2,500 nm which contains the short wave-infrared (SWIR) from 1100–2500 nm, the mid-infrared (MIR) region from 2,500 nm to 5 × 10 4 nm, and the far-infrared (FIR) region from 5 × 10 4 nm to 5 × 10 6 nm (Osborne et al., 1993).
In this study, four-element high entropy carbonate solid solutions with Mg as the primary element and three equimolar transition metal elements (Co, Ni, Zn, Fe, Mn and Cu) were successfully prepared using the hydrothermal method. The crystal structure, microstructure, color properties, and reflectance of the synthetic materials were characterized using techniques …
The Au mol.% in the raw materials for SZAN-0.1Au and 0.5Au samples is insufficient to be detected by XRD pattern; however, STEM and EDX patterns indicate the …
1.1 Device Configuration. Near-infrared (NIR) spectrometers are composed of a light source, a sample optical system, a spectrometer, and a detector. The configuration of NIR spectrometers is largely confined to two types, as shown in Fig. 9.1a and b. In type (a), the sample is positioned after the spectrometer and thereby irradiated with monochromatic light.
However, Fe 2 O 3 has relatively low near-infrared reflectance, color stability, and an easy-to-fade color [22]. Therefore, exploring more functional and structurally tunable inorganic cool red pigments is essential to develop eco-friendly cool colorants. The Cr-doped YAlO 3 has been developed as the red ceramic pigments [[23], [24], [25]].
This ceramic, synthesized from an onion-like boron nitride nanoprecursor with conventional spark plasma sintering and hot-pressing sintering, consists of interlocked laminated nanoplates in which ...
Other substances containing only primary amines or no β-OH lack reaction competitiveness due to their weaker nucleophilicity or inability to undergo further cyclization. The fluorescence recovery of the probe was linearly related to the EP concentration of 2-75 μmol/L. The detection limit was 0.4 μmol/L. The recovery rate was 94.78-111.32%.
To the best of our knowledge, this is the first time that such medically approved ceramic implants were characterized using PL-QY spectroscopy, revealing a strong …
In conclusion, Er(3+)-doped SiO2:Ta2O5 channel waveguides and nanocomposites are promising materials for photonic applications. An Er(3+)-doped SiO2:Ta2O5 optical channel waveguide and nanocomposite were prepared by the sol-gel route at a Si:Ta 50:50 molar ratio. Channels with an excellent surface profile were easily and quickly fabricated by focusing a …
Clinobisvanite (monoclinic scheelite BiVO4, S.G.I2/b) has garnered interest as a wide-band semiconductor with photocatalyst activity, as a high NIR reflectance material for camouflage and cool pigments and as a photoanode for PEC application from seawater. BiVO4 exists in four polymorphs: orthorhombic, zircon-tetragonal, monoclinic, and scheelite …
Near-infrared (NIR) light, valuable for its biological penetration and invisibility to the human eye, is a crucial tool in biomedicine, environmental monitoring, anticounterfeiting, …
Broadband near-infrared (NIR) spectroscopy technology has received extensive attention for optical coherence tomography, invasive disease diagnosis and therapy, and quantitative composition ...
An Er(3+)-doped SiO2:Ta2O5 optical channel waveguide and nanocomposite were prepared by the sol-gel route at a Si:Ta 50:50 molar ratio. Channels with an excellent surface profile were easily and quickly fabricated by focusing a femtosecond laser onto the surface of multilayered films deposited on Si …
After 1,064 nm laser irradiation, the temperature of NIR-II-CD/BP increased by 25.7°C, and finally reached 53.7°C ( Figure 4C ), showing excellent photothermal conversion …
Background: Infrared rays, that comprise NIR, MIR and FIR rays, are increasingly used for enhancing athletic performance and muscle recovery but also for neuromuscular rehabilitation and in sports ...
Introduction. Several recent studies in animal models of Alzheimer's and Parkinson's disease have reported that low-level near infrared light (NIr) therapy not only mitigates the behavioral deficits associated with these conditions but also has neuroprotective effects, slowing the underlying death of neurons.
Rheological behavior of the slurry. The schematic of NIR-assisted DIW was shown in Fig. 1 a. Excellent structure depends on the proper rheological properties of the ink 24 – 26.An excellent slurry should possess excellent thixotropic behavior, that is, the viscosity and modulus drop rapidly during high shear and recover quickly when shearing stops.
Recent advances in NIR fluorophores including organic dyes and lanthanide-doped inorganic nanoparticles have realized the effective use of the NIR optical window for in vivo bioimaging and ...
