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Article
Crystallography
Rasa Karalkeviciene et al.
Summary: In this study, the effects of sodium lauryl sulfate and various amino acids on the formation of calcium-deficient hydroxyapatite were investigated. The nature and concentration of the additives were found to influence the phase purity and morphology of the final product. Higher concentrations of sodium lauryl sulfate and dodecanedioic acid induced the formation of impurities, while aspartic and suberic acid did not affect the phase purity. The morphology of the samples varied depending on the concentrations of specific organic additive.
Article
Crystallography
Inna Melnyk et al.
Summary: The co-condensation of two alkoxysilanes in an ammonia medium using the Stober method was employed for the one-pot synthesis of spherical silica particles with different functional groups. The structure and properties of the synthesized particles were characterized using various techniques, and it was found that the type of N-containing silane affected the morphology and porosity of the particles. Furthermore, the sorption properties of the materials for different ions and proteins were dependent on the structure of the materials and the type of functional group incorporated. This research provides prospects for the directed synthesis of amino-functionalized hybrid organosilica materials for various applications.
Article
Crystallography
Egle Ezerskyte et al.
Summary: Rare-earth-doped GdPO4 nanoparticles with simultaneous optical and magnetic properties have gained much attention for their potential application in bio-imaging. In this study, GdPO4:Eu3+ nanoparticles were synthesized hydrothermally by adjusting synthesis parameters such as pH, :molar ratio, and Eu3+ concentration. The results showed that the Eu3+ content had little effect on particle shape and morphology, while the pH had a pronounced impact on particle size and distribution. Increasing the :molar ratio resulted in a decrease in nanoparticle length and an increase in width. The synthesized GdPO4:50%Eu3+ sample exhibited significant emission intensity even at room temperature.
Article
Crystallography
Anton Petrovich Novikov et al.
Summary: This study successfully synthesized two new platinum and uranium compounds with nicotinic acid and determined their structures through single-crystal X-ray diffraction. Hirshfeld surface analysis revealed that hydrogen bonds were the main contributors to intermolecular interactions in all compounds.
Article
Crystallography
Rasa Karalkeviciene et al.
Summary: This study investigated the effects of various organic solvents and solvothermal conditions on the formation of calcium-deficient hydroxyapatite (CDHA) through the hydrolysis of alpha-tricalcium phosphate (alpha-TCP). It was found that methanol and ethylene glycol had a prominent inhibitory effect on the hydrolysis and formation of CDHA, while ethanol, isopropyl alcohol, and butyl alcohol did not inhibit the hydrolysis. Ethylene glycol had the largest impact on sample morphology, with samples containing a significant fraction of rods obtained under certain ratios and solvothermal conditions. However, samples prepared with ethylene glycol had particularly low surface area.
Article
Crystallography
Antanas Nacys et al.
Summary: In this study, a platinum-coated Ni foam catalyst showed enhanced electrocatalytic activity for the oxidation of formate in an alkaline medium. It promoted the reaction at more negative potentials than a pure Pt electrode, indicating high activity. The catalyst also proceeded the reaction via a direct pathway mechanism without significant accumulation of poisonous carbonaceous species.
Article
Crystallography
Gintare Rimkute et al.
Summary: In this study, graphite intercalation compounds (GICs) were synthesized using different oxidizers and characterized using various techniques. The results show that the choice of oxidizer and the addition of P2O5 affect the structure and defect concentration of the products. The combination of persulfate oxidizers and P2O5 is found to produce high-quality graphene or graphene oxide.
Article
Crystallography
Gintare Rimkute et al.
Summary: In this study, graphene-polypyrrole nanocomposites were synthesized via a wet-way protocol using a graphite bisulfate precursor. It was discovered that the proposed synthesis method could produce graphene with low defect concentration. The research on anion intercalation involving relatively complex structures, such as HSO4-, is still limited and requires further investigation. This study contributes to the development of cost-effective, scalable, and highly efficient intercalation methods.
Article
Crystallography
Siarhei Zavatski et al.
Summary: In this study, the relationship between the structural parameters of porous silicon (PS) and the morphology of gold nanostructures fabricated on its surface, with a focus on SERS response, is investigated. By coating PS surfaces with gold, large-area plasmonic gold nanostructures are fabricated, suitable for a wide range of plasmonic applications.
Article
Crystallography
Mazen Alshaaer et al.
Summary: This study investigates the full-scale substitution of Ca2+ with Ni2+ in brushite, leading to the formation of monophasic nanocrystals of HNiP. By experimenting with various molar concentrations of starting solutions, it is found that the microstructure of the material can be controlled by the Ni/Ca ratio and modified to achieve desired characteristics.
Article
Crystallography
Jing Zhang et al.
Summary: The structures of two phase-pure cobalt(II) cyanoguanidine bromide coordination compounds were solved using X-ray single-crystal data. Diffuse reflectance spectra and IR analysis revealed optical and vibrational differences between these compounds. The magnetic susceptibility measurements indicated isolated Co2+ centers for compound 1 and potential weak antiferromagnetic exchange interactions for compound 2.
Article
Crystallography
Xin Yan et al.
Summary: A tube-like g-C3N4/Ag3PO4 heterojunction was constructed using the chemical precipitation method, where Ag3PO4 nanoparticles were loaded onto the surface of tube-like g-C3N4. This heterojunction exhibited optimal photocatalytic performance in degrading RhB under visible light irradiation. The high activity and stability of the heterojunction was explained by a proposed Z-type mechanism.
Article
Crystallography
Olga V. Nestroinaia et al.
Summary: The unstable oxidation state of nickel at +3 can be stabilized in layered double hydroxides, with the resulting crystallinity and properties depending on the synthesis method. Three wet chemical methods were used to synthesize Mg/Ni-Al LDHs, with lattice parameters of the samples differing by about 1.5% among the different methods. XPS confirmed the oxidation state of nickel in the LDH samples, with TEM mapping showing uniform distribution of nickel. Reduction with hydrogen and thermal transformations were studied, revealing similar properties among samples synthesized by different methods.
Article
Crystallography
Anton Petrovich Novikov et al.
Summary: The study aimed to synthesize novel compounds of palladium and platinum with nitrogenous bases using wet chemistry methods. Single crystal structures of the obtained compounds were determined by X-ray diffraction, revealing M-N bonds and organic ligands in the first coordination sphere. Analysis of Hirshfeld surfaces showed different intermolecular interactions in the complexes compared to their analogues.
