Showing papers on "Crystal published in 2022"
TL;DR: In this paper, the first prominent crystallographic texture of tungsten using laser powder bed fusion (LPBF) was formed to reduce the crystal misorientation at the melt pool center, at which the solidification fronts from the right and left halves of the encounter.
31 citations
TL;DR: In this paper, a single crystal ZnO of large size and few bulk defects crafted by a hydrothermal method for piezocatalytic hydrogen generation from pure water was reported.
18 citations
TL;DR: In this article, the effects of crystal orientation on the plastic deformation and mechanical properties of the nickel-based single crystal two-phase model under uniaxial tension/compression were simulated by molecular dynamics.
15 citations
TL;DR: In this paper, the terahertz (THz) spectra of four DNA nucleosides (Adenosine, Thymidine, Cytidine and Guanosine) and two nucleoside derivatives (Ribavirin and Entecavir, first time reported) were studied experimentally by Fourier Transform Infrared Spectroscopy (FTIR) in the frequency of 1-10 THz.
14 citations
TL;DR: In this article, the influence of the matrix composition on the emitting Ce ion is studied using linear and time-resolved nonlinear optical absorption and timeresolved photoluminescence spectroscopy.
14 citations
TL;DR: In this article, the electrochemical corrosion and passivation behaviors of DD5 Ni-based single crystal superalloy with different crystal orientations were compared by using electrochemical techniques, which revealed the compositions of passive film and the corrosion morphologies on various crystal planes.
12 citations
TL;DR: In this paper, the physical, structural, optical, shielding, thermal and luminescence properties of WO3-Gd2O3 -B2O-3 glasses were studied.
11 citations
TL;DR: In this paper, the authors summarized the growth defects of organic crystals from four perspectives; formation mechanism, characterization methods, control methods, and applications, and concluded three kinds of formation mechanism which are related to diffusion of solute molecules, impurities participating in the crystal growth, and structure of solutes respectively.
11 citations
TL;DR: The effect of point defects due to STM doping in glycine phosphite has been studied in this paper, where the intrinsic and extrinsic point defects were created due to the doping effect and phase changes in lattice parameter values and intensity of reflections have been analyzed.
10 citations
TL;DR: In this article, the Bridgman method was used to grow Praseodymium (Pr) and magnesium ion (Mg) co-doped LiNbO3 crystals near 1588nm.
Abstract: Praseodymium ion (0.5, 1 mol%) and magnesium ion (1, 5 and 7 mol%) co-doped LiNbO3 crystals have been grown by Bridgman method. The crystal was designed to absorb idler generated by the quasi parametric chirped pulse amplification (QPCPA) system near 1588 nm (the pump is 1064 nm and signal is 3200 nm). The contents of Praseodymium (Pr) and magnesium (Mg) ions in the crystals were measured, and the crystal structure and Raman vibration mode were characterized. The optical properties of the crystal were systematically investigated, the transmittance of the crystal at 3200 nm and 1064 nm was about 75%, and there is an obvious absorption band at 1588 nm. The thermal properties of the crystal were studied, and the results showed that the thermal properties of the crystal were improved by doping Mg2+. The laser damage threshold of Pr3+(0.5mol%)-Mg2+(7mol%) co-doped LiNbO3 crystal was as high as 109.73 × 107 W/cm2 (@1064 nm, 5 ns).
9 citations
TL;DR: In this paper, the photoluminescence (PL) excitation spectra of tetrahedrally connected Mo-O complexes in two different crystal phases were comparatively investigated.
TL;DR: Hirshfeld surface analysis and fingerprint plots of dl -methionine polymorphs were investigated using combined crystallographic methods, a possible source to observe the intermolecular interactions in the crystal state of polymorphs as discussed by the authors.
TL;DR: In this paper, the analysis of the microstructure reveals that the crystalline phases in the heat affected zone (HAZ) are mainly α-Fe and M23(CB)6 phases, and coexist with the amorphous phases.
TL;DR: In this article, a novel tetragonal antifluorite cubic form of the [(CH3)4N]2SiF6 compound is investigated and compared with its already studies cubic antiffluorite form (Fm3m).
TL;DR: In this article, structural and optoelectronic properties of alkali niobates were investigated in different crystal structures e.g. cubic, tetragonal, orthorhombic and rhombohedral using generalized gradient approximation (GGA), GGA with Hubbard potential and modified Becke-Johnson (mBJ) approach.
TL;DR: In this article, a change in the growth mechanism via the physical state of catalyst droplet (liquid or solid) and hence, study the induced structural modifications in ZnS nanowires.
Abstract: Peculiar and unique growth mechanisms involved in semiconductor nanowires (NWs) pave the way to the achievement of new crystallographic phases and remarkable material properties, and hence, studying polytypism in semiconductor NWs arouses a strong interest for the next generation of electronic and photonic applications. In this context, the growth of ZnS nanowires has been investigated, as bulk ZnS compound exhibits numerous unstable polytypes at high temperatures, but their stable occurrence is highly anticipated in a nanowire due to its special quasi-dimensional shape and growth modes. In this work, the idea is to provide a change in the growth mechanism via the physical state of catalyst droplet (liquid or solid) and hence, study the induced structural modifications in ZnS nanowires. The HRTEM images of VLS (via liquid alloyed catalyst) grown ZnS NWs show periodic stacking faults, which is precisely identified as a stacking sequence of cubic or hexagonal individual planes leading to an astonishing 15R crystal polymorph. This crystallographic phase is observed for the first time in nanowires. Contrastingly, NWs grown with VSS (via solid catalyst) show crystal polytypes of zinc blende and wurtzite. We calculate and discuss the role of cohesive energies in the formation of such ZnS polytypes. Further, we present the selection rules for the crystallization of such 15R structure in NWs and discuss the involved VLS and VSS growth mechanisms leading to the formation of different crystal phases.
TL;DR: In this article, small molecules (urea, PCBM and C60) were added to the MAPbI3 crystal thin films to passivate the defects at the grain boundaries.
TL;DR: In this paper, a predictive analytical model for the thermal conductivity of Aluminum/transition metal based high-entropy alloys based on contributions from the electron and lattice subsystems is presented.
TL;DR: In this paper, two types of octacalcium phosphate (OCP) biomaterials were synthesized by wet-chemical processing in the presence (c-OCP), and absence (w)-of gelatin, respectively, and subjected to structural, chemical and biological analyses.
TL;DR: In this article, a new organic nonlinear optical (NLO) material, 2-(4-chlorophenoxy)-N'-[(1E)-1-(4fluorophenyl) ethylidene] acetohydrazide (4CP4FPEA), has been synthesized and single crystals were grown using DMF as solvent.
TL;DR: An Er:Yb:YSr3(PO4)3 single crystal was grown by the Czochralski method and its spectroscopic properties were investigated at room temperature as discussed by the authors.
TL;DR: In this paper, the slow evaporation solution growth technique is adopted for growing L-proline doped Potassium hydrogen phthalate (KHP) single crystals, and the lattice parameters were identified by single crystal X-ray diffraction.
TL;DR: In this paper, a novel hybrid compound based on tin fluoride of bis 1.10-phenanthrolinium cis di fluoro bis oxalate stannate (IV) dehydrate formulated as [(C12N2H9]2[SnF2(C2O4)2]2H2O] has been synthesized and characterized by powder and single X-ray diffraction (XRD), infrared (IR) and ultraviolet-visible (UV-vis) spectroscopy.
TL;DR: In this article, a cadmium chloride monohydrate doped sulphamic acid crystals were grown successfully by slow evaporation method at room temperature and characterized by single crystal X-ray diffraction and conforms the unit cell parameters.
TL;DR: In this article, the authors studied the dielectric response of nanoceramics and found that the electric dipole of spin origin contributes to the deformation of free nanocrystallites and in form of pellets.
TL;DR: In this paper, a crystallization kinetic-controlled strategy is suggested to form the amorphous isopolytungstate (IPT) film, which is prepared using inkjet print technology with a series of low-temperature process.
TL;DR: In this paper, the lattice structures and optical properties of C, Si and Cu-ion implantation were investigated in the Ce:LYSO crystal waveguides at 6.5 MeV and XRD and Raman spectra were used to study the optical properties.
TL;DR: In this paper, the authors presented the way of evaluating the crystallographic orientation and crystallinity of hydroxyapatite (HAp) thin films by Raman scattering spectroscopy.
TL;DR: In this article, the authors measured the contact angles of three different liquids on the crystal faces of α-quartz and used the time-of-flight secondary ion mass spectrometry (ToF-SIMS) to establish the crystal surface models; molecular dynamics simulations with the surface models were performed to understand the wetting behavior at molecular scale.
TL;DR: In this article, a diamond film was synthesized by chemical vapor deposition, where a hot graphite plate was used to thermally activate methane and hydrogen, and the effect of parameters on the diamond films grown, such as pressure ranging from 40 to 100 torr, methane concentration in hydrogen varying from 0.5 to 2'vol %, and substrate temperatures from 1020 to 1140'°C, were studied.