A5061195901- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Crystal Structures and Properties
- Advanced Condensed Matter Physics
- Magnetic and transport properties of perovskites and related materials
- Multiferroics and related materials
- Inorganic Fluorides and Related Compounds
- Ferroelectric and Piezoelectric Materials
- Crystallography and molecular interactions
- Solid-state spectroscopy and crystallography
- Perovskite Materials and Applications
- Hippo pathway signaling and YAP/TAZ
- Microwave Dielectric Ceramics Synthesis
- Inorganic Chemistry and Materials
- Iron-based superconductors research
- Magnetism in coordination complexes
- Advanced Topics in Algebra
- Physics of Superconductivity and Magnetism
- Luminescence Properties of Advanced Materials
- Radioactive element chemistry and processing
- RNA and protein synthesis mechanisms
- Cellular Mechanics and Interactions
- Photorefractive and Nonlinear Optics
- Algebraic structures and combinatorial models
- Topological Materials and Phenomena
Clemson University
2020-2025
Johns Hopkins University
2017-2023
California State University, Fullerton
2020-2021
Gdańsk University of Technology
2020
PARADIM
2020
University of Houston
2011-2019
University of Windsor
2017-2019
Windsor Dermatology
2017-2019
University of Baltimore
2017-2018
Loyola University Chicago
2017-2018
Deep ultraviolet (absorption edge <200 nm, band gap >6.2 eV) nonlinear optical (NLO) materials are of current interest owing to their technological applications and design challenges. Technologically, the used in laser systems, atto-second pulse generation, semiconductor manufacturing, photolithography. Designing synthesizing a deep UV NLO material requires crystallographic non-centrosymmetry, wide transparency range, large second-harmonic generating coefficient (dij > 0.39 pm/V), moderate...
A general design strategy is presented for tuning the convergence of direct and indirect bandgaps based on chemical adjustment s- p-orbital character conduction band minimum.
A new deep-ultraviolet nonlinear optical material, RbMgCO3F, has been synthesized and characterized. The achiral nonpolar acentric material is second harmonic generation (SHG) active at both 1064 532 nm, with efficiencies of 160 × α-SiO2 0.6 β-BaB2O4, respectively, exhibits a short UV cutoff, below 190 nm. RbMgCO3F possesses three-dimensional structure corner-shared Mg(CO3)2F2 polyhedra. Unlike other carbonate fluorides, in this example, the inclusion Mg(2+) creates pentagonal channels where...
Noncentrosymmetric mixed-metal carbonate fluorides are promising materials for deep-ultraviolet (DUV) nonlinear optical (NLO) applications. We report on the synthesis, characterization, structure–property relationships, and electronic structure calculations two new DUV NLO materials: KMgCO3F Cs9Mg6(CO3)8F5. Both noncentrosymmetric (NCS). crystallizes in achiral nonpolar NCS space group P6̅2m, whereas Cs9Mg6(CO3)8F5 is found polar Pmn21. The compounds have three-dimensional structures built...
Abstract A new beryllium‐free deep‐ultraviolet (DUV) nonlinear optical (NLO) material, β‐Rb 2 Al B O 7 (β‐RABO), has been synthesized and characterized. The chiral nonpolar acentric material shows second‐harmonic generation (SHG) activity at both 1064 532 nm with efficiencies of 2×KH PO 4 0.4×β‐BaB , respectively, exhibits a short absorption edge below 200 nm. three‐dimensional structure corner‐shared Al(BO 3 ) polyhedra. discovery β‐RABO that through careful synthesis characterization,...
For a crystal to exhibit nonlinear optical (NLO) activity such as second-harmonic generation (SHG), it must belong noncentrosymmetric (NCS) space group. Moreover, for these materials be suitable practical uses, the synthesized crystals should phase-matchable (PM). Previous synthetic research into SHG-active has centered on (i) how create NCS compounds and/or (ii) obtain with high SHG efficiencies. With tactics, one can synthesize material efficiency, but could unusable if was...
Two lead fluorocarbonates, RbPbCO3F and CsPbCO3F, were synthesized characterized. The materials through solvothermal conventional solid-state techniques. CsPbCO3F structurally characterized by single-crystal X-ray diffraction exhibit three-dimensional (3D) crystal structures consisting of corner-shared PbO6F2 polyhedra. For RbPbCO3F, infrared ultraviolet–visible spectroscopy thermogravimetric differential thermal analysis measurements performed. is a new noncentrosymmetric material...
Polar LiNbO3-type magnetic oxides have been extended, for the first time, to A2BB′O6 family. Mn2+2Fe3+M5+O6 (M=Nb, Ta), synthesized at high pressure, adopt a polar structure, as demonstrated by electron diffraction and second harmonic generation effect, they interesting properties. As service our authors readers, this journal provides supporting information supplied authors. Such materials are peer reviewed may be re-organized online delivery, but not copy-edited or typeset. Technical...
The IO<sub>3</sub> groups in Na<sub>2</sub>Sn(IO<sub>3</sub>)<sub>6</sub> are aligned a parallel manner attributed to the six-coordinate Na<sup>+</sup> cation, whereas polyhedra Cs<sub>2</sub>Sn(IO<sub>3</sub>)<sub>6</sub> rotate with respect Sn<sup>4+</sup> due nine-coordinate Cs<sup>+</sup> cation.
Abstract A new beryllium‐free deep‐ultraviolet (DUV) nonlinear optical (NLO) material, β‐Rb 2 Al B O 7 (β‐RABO), has been synthesized and characterized. The chiral nonpolar acentric material shows second‐harmonic generation (SHG) activity at both 1064 532 nm with efficiencies of 2×KH PO 4 0.4×β‐BaB , respectively, exhibits a short absorption edge below 200 nm. three‐dimensional structure corner‐shared Al(BO 3 ) polyhedra. discovery β‐RABO that through careful synthesis characterization,...
Two new potassium lead fluoride carbonates, KPb2(CO3)2F and K2.70Pb5.15(CO3)5F3, have been synthesized characterized. The materials were through solvothermal conventional solid-state techniques. K2.70Pb5.15(CO3)5F3 structurally characterized by single crystal X-ray diffraction exhibit two-dimensional structures consisting of corner-shared PbO6F PbO6F2 polyhedra. is noncentrosymmetric, crystallizes in the achiral nonpolar space group P6̅m2 (crystal class -6m2). Powder second-harmonic...
Two new non-centrosymmetric (NCS) n = 3 layered perovskites, RbBi2Ti2NbO10 and CsBi2Ti2TaO10, have been synthesized through high temperature solid state reactions. X-ray diffraction analyses suggest that crystallizes in the orthorhombic polar space group, Ima2 (No. 46), whereas CsBi2Ti2TaO10 tetragonal nonpolar P4̅ 81). Interestingly, is first Dion–Jacobson (DJ)-type perovskite with a NCS group. Powder second-harmonic generation (SHG) measurements 1064 nm radiation reveal both of reported...
Mục tiêu: Đánh giá hiệu quả của kỹ thuật đặt catheter tĩnh mạch cảnh trong kết nối buồng tiêm hóa chất dưới hướng dẫn siêu âm ở trẻ em. Phương pháp: Nghiên cứu mô tả cắt ngang tiến hành trên 32 bệnh nhi từ 1-14 tuổi có chỉ định gây mê toàn thân để da. Catheter được âm, sau đó tạo đường hầm da vị trí chọc kim đến xương đòn cùng bên 1,5-3,0 cm tùy theo độ và với tiêm. Các tiêu chí nghiên bao gồm tỷ lệ thành công biến chứng. Kết quả: Tỷ chung là 96,9%, lần đi đầu tiên 90,6%. Thời gian thực hiện...
The syntheses of two noncentrosymmetric (NCS) vanadium oxide–fluoride compounds that originate from the same synthetic reagent concentrations are presented. Hydrothermal and low-temperature allow isolation metastable products may form new phases (or decompose) upon heating creation chemically similar but structurally different materials. NCS materials synthesis has been a long-standing goal in inorganic chemistry: this article, we compare materials, NaVOF4(H2O) (I) NaVO2–xF2+x (II; x = 1/3)....
A diverse range of materials and properties are exhibited by layered perovskites. We report on the synthesis, characterization, computational investigation a new ferroelectric—CsBi2Ti2NbO10—an n = 3 member Dion–Jacobson (DJ) family. Structural studies using variable-temperature neutron powder diffraction indicate that combination octahedral rotations polar displacements result in structure. Density functional theory calculations reveal wider perovskite blocks CsBi2Ti2NbO0 stabilize proper...
We report the discovery of magnetoelectric multiferroicity in a family oxides, $R\mathrm{FeW}{\mathrm{O}}_{6}$ ($R=\mathrm{Dy}$, Eu, Tb, and Y) that crystallize polar aeschynite-type structure ($Pna{2}_{1}$) with an ordered arrangement $\mathrm{F}{\mathrm{e}}^{3+}$ ${\mathrm{W}}^{6+}$ ions. Magnetization analysis neutron-diffraction data $\mathrm{DyFeW}{\mathrm{O}}_{6}$ reveal commensurate noncollinear antiferromagnetic ordering spins...
Synthetic barlowite, $\mathrm{C}{\mathrm{u}}_{4}{(\mathrm{OH})}_{6}\mathrm{BrF}$, has emerged as a new quantum spin liquid (QSL) host, containing kagom\'e layers of $S=1/2\mathrm{C}{\mathrm{u}}^{2+}$ ions separated by interlayer $\mathrm{C}{\mathrm{u}}^{2+}$ ions. Similar to synthetic herbertsmithite, $\mathrm{ZnC}{\mathrm{u}}_{3}{(\mathrm{OH})}_{6}\mathrm{C}{\mathrm{l}}_{2}$, it been reported that $\mathrm{Z}{\mathrm{n}}^{2+}$ substitution for the induces QSL ground state. Here we report...
Three new salt inclusion compounds (CsX)Cu5O2(PO4)2 (X = Cl, Br, I), phosphate analogues of the kagomé mineral averievite, are reported. Their crystal structures composed trigonal networks corner-sharing OCu4 anion-centered tetrahedra, forming capped-kagomé planes, which can also be regarded as two-dimensional slices along [111] direction a pyrochlore lattice. Magnetization and heat capacity measurements reveal strong geometric frustration this network complex magnetic behavior. X-ray...
Cesium vanadate, Cs2V3O8, a member of the fresnoite-type structure, was synthesized via hydrothermal route and structurally characterized by single-crystal X-ray diffraction. Cs2V3O8 crystallizes in noncentrosymmetric polar space group, P4bm, with crystal data = 8.9448(4) Å, c 6.0032(3) V 480.31(4) Å(3), Z 2. The material exhibits two-dimensional layered structure consisting corner-shared V(5+)O4 V(4+)O5 polyhedra. layers are separated cesium cations. alignment individual polyhedra results...
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...
A new noncentrosymmetric U(4+)-containing fluoride, U3F12(H2O), has been synthesized via a mild hydrothermal route and its crystal structure determined by single-crystal X-ray diffraction. The material exhibits complex three-dimensional that is based on [U6F33(H2O)2)](9-) hexanuclear building units consisting of corner- edge-shared UF8, UF9, UOF7 polyhedra. Powder second-harmonic generation (SHG) measurements revealed the SHG efficiency for U3F12(H2O) comparable to α-SiO2. Magnetic...
The reactions of (S)-2-(1,8-naphthalimido)propanoic acid (HL(ala)) and (S)-2-(1,8-naphthalimido)-3-hydroxypropanoic (HL(ser)), protonated forms ligands that contain a carboxylate donor group, an enantiopure chiral center, 1,8-naphthalimide π···π stacking supramolecular tecton in the case HL(ser) alcohol functional with appropriate alkali metal hydroxide followed by variety crystallization methods leads to formation crystalline K(L(ala))(MeOH) (1), K(L(ala))(H2O) (2), Na(L(ala))(H2O) (3),...
Lead-free bismuth-based perovskite oxides with polarization directed along the [001]p primitive unit cell edge, analogous to tetragonal PbTiO3, are synthesized at ambient pressure. Enhanced piezoelectric properties, large polarizations, and high depolarization temperatures observed in wide morphotropic phase boundary region formed a rhombohedral phase, up 92.5% Bi on A site. The oxide lead zirconate titanate (PbZr1−xTixO3) (PZT) has extraordinary electromechanical properties (MPB),1 making...