Mesoporous Ta2O5 nanoparticles (NPs) with high surface area were prepared using an 1-methyl 3-(2-bromoethyl) imidazolium bromide ionic liquid (IL) as structure directing and porous inducing agent. We have characterized the Ta2O5 nanoparticles (NPs) by XRD, BET analysis, TEM, SEM, DRS, FTIR, Rama...

Gel polymer electrolyte (GPE), possessing a polymer matrix and embedded liquid electrolyte, is a critical component of lithium-ion batteries. To enhance GPE performance, in this work a self-crosslinkable poly(vinylidene difluoride) (PVdF) graft copolymer possessing Meldrum's acid (MA) group...

We fabricate a free-standing few-layer molybdenum disulfide (MoS2)–polymer composite by liquid phase exfoliation of chemically pristine MoS2 crystals and use this to demonstrate a soliton mode-locked Erbium-doped fiber laser (EDFL). A stable self-started mode-locked soliton pulse is generated b...

Absorption and luminescence properties of erbium ions in the binary glass system bismuth oxide (Bi2O3)–boric oxide (B2O3) are measured for the composition range 25–65 mol% Bi2O3. A Judd–Ofelt analysis of the typical erbium bands in the absorption spectra reveals comparably high Judd–Ofelt co...

In this study, a mode-locked erbium-doped fiber (EDF) laser based on solid-state graphene oxide (GO)-doped sol-gel glass saturable absorber (SA) was designed and tested. The GO-based SA was fabricated for the first time using low-temperature sol-gel technique. Compared to traditional ways of fab...

An influence of the rare earth ions (La, Er) concentration on the luminescent properties of Ga2S3-La2S3-Er2S3 glasses in the visible and near-infrared spectral region has been studied. The analysis of absorption spectra and luminescence allow understanding of the redistribution processes of radi...

A Q-switched Erbium-doped fiber laser by using MoSe2 thin film as saturable absorber is experimentally demonstrated. The bulk MoSe2 is processed into few layer MoSe2 based on liquid phase exfoliation technique, and further fabricated into thin film by using polyvinyl alcohol polymer. Q-switching...

Erbium ions have been implanted into zinc sulphide single crystals which were then each provided with one rectifying contact and one ohmic contact. Bright green d.c. electroluminescence is produced in the ZnS : Er diodes when they are operated in reverse bias. The emission is characteristic of E...

A highly sensitive trace hydrogen sulfide (H2S) gas sensing scheme based on all-optical photoacoustic spectroscopy is demonstrated. A high-power erbium-doped fiber amplified near-infrared laser is used as a light source for acoustic excitation. Meanwhile, the second-harmonic photoacoustic signal...

A tunable, Q-switched depressed-cladding erbium-doped fiber (DC-EDF) laser employing a molybdenum tungsten disulfide (MoWS2) thin film as a saturable absorber (SA) is reported. The output of the laser can be controlled by adjusting the spooling diameter of the gain medium, with continuous wave o...

Up-conversion process is being widely studied due to its enormous applications such as bioimaging, energy harvesting, and optical sensors. However, the low conversion efficiency can limit these applications. In this paper, a detailed study about the effect of using plasmonic metallic nanostructu...

A comparative study has been performed of hydrogen and deuterium sorption inside a thin layer palladiuim electrode from acidic and basic solutions containing lithium cations. Lithium presumed to be incorporated in electrode, has an influence on the α- to β-phase transition only in basic soluti...

The reaction of lithium hydride (LiH) powder with pure water vapor (H2O and D2O) was studied by thermogravimetry and in situ infrared spectroscopy at 298 K over a large pressure range. The mean particle size of LiH is around 27 μm. At very low pressure, the hydrolysis starts with the formation ...

The reactions of copper and amorphous silicon were studied by in-situ transmission electron microscopy up to 500 °C. Only the Cu76Si24-η phase and the Cu82Si18-δ phase formed at this temperature. The crystal structure of the dominating Cu76Si24 changed, by the elapsed time after heating. The ...

The characterization and control of atomic substitution process is crucial in fabricating high-quality two-dimensional layered compound materials and tuning their physical properties. With intensity-voltage low energy electron microscopy (IV-LEEM), we found that the concentration of copper in th...

The reaction of Nb2O5 with 96% H2SO4 was studied at 200–300 °C for 3 h. No reaction occurred at 200 °C. An amorphous niobium oxysulfate was formed when the reaction temperature was 250 °C. However, the crystaline niobium oxysulfate was produced when the temperature reached 300 °C. XRD analy...

We report the effects of thermal treatment and La doping on the Sr site in the newly discovered intergrowth superconductor TlSr4Cu2Oz(SO4), whose zero-resistivity temperature is found to be above 70 K. This new phase crystallizes in the tetragonal system (p4/mmm, a = 3.83 Å, c =16.6 Å). Resistiv...

It is known that copper ion (Cu(II)) binds to amyloid-β peptide (Aβ), induces Aβ oligomer formation and ultimately exacerbates Aβ-aggregation neurotoxicity in Alzheimer's disease (AD). It becomes interesting to know that how this chemical modification of Aβ would affect interaction of ...

Four novel single crystals of α-glycine and γ-glycine doped by copper nitrate: (Glycine)1−X (Cu(NO3)2·3H2O)X abbreviated as (GCN1, GCN2, GCN3, GCN4) were prepared from aqueous solution by the slow evaporation method. Four doping concentrations: x = 0.005, 0.01, 0.02 and 0.04 of hydrated coppe...

In this work, the wastewater containing sulfate ions, nitrate ions or chloride ions was used to investigate the performance of anions in copper removal by mechanically activated calcium carbonate. The copper removal from wastewater containing sulfate anion achieved almost 99% with the CaCO3/Cu m...