Described herein are initial experimental details and properties of a silicon core, silica glass-clad optical fiber fabricated using conventional draw methods. Such semiconductor core fibers have potential to greatly influence the fields nonlinear optics, infrared THz power delivery. More specifically, x-ray diffraction Raman spectroscopy showed be highly crystalline silicon. The measured propagation losses were 4.3 dB/m at 2.936 microm, which likely caused by either microcracks in arising...

Long lengths (250 meters) of a flexible 150 microm diameter glass-clad optical fiber containing 15 crystalline and phase-pure germanium core was fabricated using conventional draw techniques. X-ray diffraction spontaneous Raman scattering measurements showed the to be very highly with no observed secondary phases. Elemental analysis confirmed well-defined core-clad interface step-profile in composition nominally 4 weight-percent oxygen having diffused into from glass cladding. For this...

The highly nonequilibrium conditions under which optical fibers conventionally are drawn afford considerable, yet underappreciated, opportunities to realize comprised of novel materials or that themselves cannot be directly fabricated into fiber form using commercial scalable methods. Presented here is an in-depth analysis the physical, compositional, and selected properties silica-clad erbium-doped yttrium aluminosilicate glass derived from undoped, 0.25, 50 wt % Er3+-doped aluminum garnet...

Two novel, noncentrosymmetric borate fluorides, Sr3B6O11F2 and Ba3B6O11F2, have been synthesized hydrothermally their structures determined. The compounds are isostructural, crystallizing in space group P21, having lattice parameters of a = 6.4093 (13) Å, b 8.2898 (17) c 9.3656 (19) β 101.51 (3)° for 6.5572 8.5107 9.6726 101.21 Ba3B6O11F2. structure consists complex triple-ring framework aligned triangular [BO3] groups that impart polarity. Fluorine atoms bound only to the alkaline-earth...

For the first time to best of our knowledge a glass-clad optical fiber comprising crystalline binary III-V semiconductor core has been fabricated. More specifically, phosphate containing an indium antimonide (InSb) was drawn using molten approach. The found be highly with some oxygen and phosphorus diffusing in from cladding glass. While transmission measurements were unable made, most likely due free carrier absorption associated conductivity core, this work constitutes proof-of-concept...

We have developed an angle-resolved photoemission spectrometer with tunable vacuum ultraviolet laser as a photon source. The source is based on the fourth harmonic generation of near IR beam from Ti:sapphire pumped by CW green and between 5.3 eV 7 eV. most important part set-up compact, enclosed generator potassium beryllium fluoroborate crystals, grown hydrothermally in US. This can deliver flux over 10(14) photon/s. demonstrate that this energy range sufficient to measure k(z) dispersion...

We present the application of an extreme gradient boosting model (eutXG) to predict melting point (MP) deep eutectic solvents (DES). The is based on XGBoost, a decision tree ensemble designed be highly scalable that enables superior training speed and prediction accuracy. selected model─trained with molecular fingerprints, molar ratios, chemical descriptors─enabled MPs DES average accuracy 97.6%, which represents difference just ±2.4% respect values reported in literature. Using SHapley...

Mineralogically-inspired hydrothermal synthesis provides a wealth of interesting opportunities for the solid-state inorganic chemist.

Abstract Nature provides a rich panoply of structural motifs comprised composites whose mechanical properties exceed those their individual components. The human endeavor to likewise craft value‐added materials from underappreciated, sustainably sourced feedstocks remains formidable challenge. Herein, efforts are made achieve durable by synergistic combination sulfur and cellulose. Composites achieved in which bulk is reinforced network 1–20% mass cellulose cross‐linked with polysulfide...

ABSTRACT Efforts to develop sustainable industrial processes have led significant advances toward supplanting petrochemical‐dependent technologies. Some of these otherwise processes, notably animal product rendering and biodiesel production, produce low value waste that is high in free fatty acids. Sulfur turn a primary fossil fuel refining. In the current contribution, copolymers are prepared by reaction elemental sulfur with acids several monomer ratios. Both monounsaturated oleic acid...

Hydroxide-bridged FeIII4LnIII2 clusters having the general formula [Fe4Ln2(μ3-OH)2(mdea)6(SCN)2(NO3)2(H2O)2]·4H2O·2MeCN {Ln = Y (1), Dy (2), mdea N-methyldiethanolamine} were synthesized and magnetically characterized. The thermal relaxation of magnetization for 2 diluted FeIII4DyIIIYIII complex 3 (with without applied field) has been analyzed. sample shows a dominant QTM at low temperatures that can be removed with 0.15 T dc field. Both show moderately high Ueff barriers exhibit hysteresis...

Abstract While research into deep eutectic solvents (DESs) has expanded over the previous two decades, focus remained on utilization of hydrogen bond donors in these systems. Additionally, majority known DESs rely at least one ionic component. Through combination 1,3‐dithiane and 1,2‐diiodo‐3,4,5,6‐tetrafluorobenzene (1,2‐F 4 DIB), we report first DES based halogen bonding. This mixture remains a liquid, with melting temperature 13.7 °C range mole fraction (0.35 to 0.75). cocrystals 1,3‐...

A new series of P212121 adelite-type LnCo(GeO4)(OH) (Ln = La-Sm) single crystals were grown by a high-temperature, high-pressure hydrothermal method (650 °C and 100 MPa). Single-crystal diffraction refinements yielded chiral one-dimensional (1D) chains Co2+ along the axis with an average 2.98 Å separation between centers in [CoO2(OH)2]∞ ribbon chains. three-dimensional (3D) superstructure is formed bridging lanthanide-germanium framework two unique alternating 5.83 6.00 distances interchain...

Solid‐state electrolytes represent a significant advancement over liquid in terms of safety, reliability, and energy density, but maximizing ionic conductivity requires energy‐inefficient high‐temperature thermal processing that poses challenges for performance optimization. Herein, fast, low‐power microwave (MW) sintering sodium superionic conductor structure lithium aluminum germanium phosphate from powder is demonstrated. Structural compositional evolution characterized by scanning...

You’ve submitted your manuscript and now you wait. But, what's this? An early reply – They must’ve accepted it without revision! Wait, What? Rejected? How can this be? We’ve all experienced none of us like it, but unless are rejected by a very discerning journal, JACS, there's probably good reason for (not to pick on JACS I hope publish there someday). By “good” reason, mean one that may be easily addressed. The primary reasons tragic event often minor, result in the paper not being...

As a crystallographer, nothing is sadder than failed crystal growth. an “experienced” crystallographer (a basketball ref couldn't hand signal my number of years), I’ve thrown away more share oily smudges (always according to established hazardous waste procedures, course). Fortunately, students are curious I. Recently we reported the first halogen-bonding-based deep eutectic solvent, which consisted mixture 1,3-dithiane and o- diiodotetrafluorobenzene – system that simply refused cooperate...

The hydrothermal growth of bulk single crystals lutetium oxide (Lu2O3) is reported. Crystals were grown at 600–650 °C 2 kbar in water with high concentrations (10–20 M) KOH as a mineralizer. Under these conditions formed spontaneously and could also be transported to suitable seeds form large (3–8 mm/edge) crystals. Experiments done optimize transport the quality for first time. doped trivalent laser active ions such Er3+ Yb3+. Absorption spectra materials determined. Thermal conductivities...

Silicon optical fibers fabricated using the molten core method possess high concentrations of oxygen in [Opt. Express 16, 18675 (2008)] due to dissolution cladding glass by melt. The presence can influence scattering, hence propagation losses, as well limit performance fiber. Accordingly, it is necessary achieve oxygen-free silicon prior further optimization. In this work, carbide (SiC) added (Si) provide an situ reactive getter during draw process. Scanning electron microscopy (SEM), energy...

Characterization of Fe(<sc>ii</sc>)–thone and –selone complexes revealed that these ligands oxidize before Fe(<sc>ii</sc>), suggesting an iron-binding mechanism for similar antioxidants.

The preparation and photophysical properties of two heavier main group element analogues boron-dipyrromethene (BODIPY) chromophores are described. Specifically, we have prepared dipyrrin complexes dichlorogallate (GADIPY) or phenylphosphenium (PHODIPY) units. Whereas cationic PHODIPY is labile, decomposing to a phosphine over time, GADIPY readily in good yield as crystalline solid having moderate air- water-stability. Crystallographically characterized displays intense green...

A novel extension to the molten core method was employed realize a glass-clad, crystalline gallium arsenide (GaAs) fiber for first time author's knowledge. GaAs is of considerable interest its optoelectronic and nonlinear properties, but decomposition volatility, usually leading incongruent solidification, normally preclude melt-processing under ambient conditions into an optical fiber. Presented here are results on tin as flux melt at temperature where volatility negligible, permitting...

Bottom-up assembly of optically nonlinear and magnetically anisotropic lanthanide materials involving precisely placed spin carriers optimized metal-ligand coordination offers a potential route to developing electronic architectures for coherent radiation generation spin-based technologies, but the chemical design historically has been extremely hard achieve. To address this, we developed worthwhile avenue creating new noncentrosymmetric chiral Ln3+ Ln2(SeO3)2(SO4)(H2O)2 (Ln = Sm, Dy, Yb) by...

The recent realization of silicon core optical fibers has the potential for novel low insertion loss rack-to-rack interconnects and a number other uses in sensing biomedical applications. To best our knowledge, incoherent light source based rapid photothermal processing (RPP) was used first time to anneal glass-clad fibers. X-ray diffraction examination showed considerable enhancement length amount single crystallinity post-annealing. Further, shifts Raman frequency fiber that were present...