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Journal articles on the topic 'BZO'

Author: Grafiati

Published: 6 September 2023

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1

Wu, Judy Z., Victor Ogunjimi, Mary Ann Sebastian, Di Zhang, Jie Jian, Jijie Huang, Yifan Zhang, Bibek Gautam, Timothy Haugan, and Haiyan Wang. "Enabling coherent BaZrO₃ nanorods/YBa₂Cu₃O_7−x interface through dynamic lattice enlargement in vertical epitaxy of BaZrO₃/YBa₂Cu₃O_7−x nanocomposites." Superconductor Science and Technology 35, no. 3 (February 4, 2022): 034001. http://dx.doi.org/10.1088/1361-6668/ac4aff.

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Abstract One-dimensional c-axis-aligned BaZrO3 (BZO) nanorods are regarded as strong one-dimensional artificial pinning centers (1D-APCs) in BZO-doped YaBa2Cu3O7−x (BZO/YBCO) nanocomposite films. However, a microstructure analysis has revealed a defective, oxygen-deficient YBCO column around the BZO 1D-APCs due to the large lattice mismatch of ∼7.7% between the BZO (3a = 1.26 nm) and YBCO (c = 1.17 nm), which has been blamed for the reduced pinning efficiency of BZO 1D-APCs. Herein, we report a dynamic lattice enlargement approach on the tensile strained YBCO lattice during the BZO 1D-APCs growth to induce c-axis elongation of the YBCO lattice up to 1.26 nm near the BZO 1D-APC/YBCO interface via Ca/Cu substitution on single Cu-O planes of YBCO, which prevents the interfacial defect formation by reducing the BZO/YBCO lattice mismatch to ∼1.4%. Specifically, this is achieved by inserting thin Ca0.3Y0.7Ba2Cu3O7−x (CaY-123) spacers as the Ca reservoir in 2–6 vol.% BZO/YBCO nanocomposite multilayer (ML) films. A defect-free, coherent BZO 1D-APC/YBCO interface is confirmed in transmission electron microscopy and elemental distribution analyses. Excitingly, up to five-fold enhancement of J c (B) at magnetic field B= 9.0 T//c-axis and 65 K–77 K was obtained in the ML samples as compared to their BZO/YBCO single-layer (SL) counterpart’s. This has led to a record high pinning force density F p together with significantly enhanced B max at which F p reaches its maximum value F p,max for BZO 1D-APCs at B//c-axis. At 65 K, the F p,max ∼158 GN m−3 and B max ∼ 8.0 T for the 6% BZO/YBCO ML samples represent a significant enhancement over F p,max ∼ 36.1 GN m−3 and B max ∼ 5.0 T for the 6% BZO/YBCO SL counterparts. This result not only illustrates the critical importance of a coherent BZO 1D-APC/YBCO interface in the pinning efficiency, but also provides a facile scheme to achieve such an interface to restore the pristine pinning efficiency of the BZO 1D-APCs.

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2

Twan Chang, Hian, Ching Yee Fong, Keane Zhi Hao Lee, Ziteng Wang, Eric Chun Yong Chan, and Hooi Yan Moy. "Identification of urinary biomarkers of synthetic cannabinoids BZO-HEXOXIZID, BZO-POXIZID, 5F-BZO-POXIZID and BZO-CHMOXIZID from authentic urine samples in Singapore." Toxicologie Analytique et Clinique 34, no. 3 (September 2022): S100—S101. http://dx.doi.org/10.1016/j.toxac.2022.06.155.

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3

Chung, Jun Ki, Won Jeong Kim, Sung Gap Lee, and Cheol Jin Kim. "Growth and Characterization of BaZrO₃ Buffer Layer for Textured YBCO Thin Films Growth on MgO (00l) Substrate." Key Engineering Materials 336-338 (April 2007): 715–18. http://dx.doi.org/10.4028/www.scientific.net/kem.336-338.715.

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Superconducting YBa2Cu3O7-δ(YBCO) films were grown on MgO single crystalline substrates using a BaZrO3 (BZO) buffer layer deposited by a pulsed laser deposition (PLD). Deposition condition has been optimized to obtain good epitaxial BZO film followed by deposition of YBCO superconducting films. The crystallinity and microstructure of epitaxial YBCO/ BZO/ MgO (00l) films were investigated by a two-dimensional x-ray diffraction and a field emission scanning electron microscope. The in-plane (φ-scan) measurements for the BZO films (200 ~ 500 nm thick) grown on MgO substrates revealed a narrow full width half maximum (0φ = 2o). The XRD results exhibited that YBCO films with a BZO buffer layer were well oriented in the [00l] direction perpendicular to the substrate surface. The BZO films also showed homogeneous and dense surface morphologies. By the deposition of a subsequent BZO buffer layer, YBCO was grown epitaxially on MgO with results showing a critical current density (Jc) of ~ 3.3 × 106 A/cm2 and a critical temperature (Tc) of 86 K.

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4

Skofronick, G. L., A. H. Carim, S. R. Foltyn, and R. E. Muenchausen. "Interfacial reaction products and film orientation in YBa2Cu3O7−x on zirconia substrates with and without CeO2 buffer layers." Journal of Materials Research 8, no. 11 (November 1993): 2785–98. http://dx.doi.org/10.1557/jmr.1993.2785.

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Thick film (1.2 μm) YBCO superconductors grown by pulsed laser deposition on unbuffered and CeO2-buffered single crystal (001)-oriented yttria-stabilized zirconia (YSZ) substrates have been investigated. YBCO and YSZ react to form BaZrO3 (BZO), whereas YBCO and CeO2 react to form BaCeO3. Reaction phases were examined by θ-2θ and four-circle x-ray diffraction and high resolution electron microscopy. Three orientation relationships identified for the unbuffered films were (i) (001)YBCO ‖ (011)BZO ‖ (001)YSZ with [110]YBCO ‖ [100]BZO ‖ [100]YSZ, (ii) (001)YBCO ‖ (001)BZO ‖ (001)YSZ with [110]YBCO ‖ [100]BZO ‖ [100]YSZ, and (iii) (001)YBCO ‖ (001)BZO ‖ (001)YSZ with [100]YBCO ‖ [100]BZO ‖ [100]YSZ. The results suggest that for films grown at typical deposition temperatures, YBCO epitaxy is established before the interfacial reaction occurs. The presence of BaCeO3 in buffered films grown at high temperatures (790 °C) was confirmed by θ-2θ scans and selected area diffraction patterns.

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5

Mohd Hapipi, Nurhidayah, Jee Lim, Soo Chen, Oon Lee, Abdul Shaari, Mohd Awang Kechik, Kean Lim, Kar Tan, Masato Murakami, and Muralidhar Miryala. "Comparative Study on AC Susceptibility of YBa2Cu3O7−δ Added with BaZrO3 Nanoparticles Prepared via Solid-State and Co-Precipitation Method." Crystals 9, no. 12 (December 9, 2019): 655. http://dx.doi.org/10.3390/cryst9120655.

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Polycrystalline samples of YBa2Cu3O7−δ (Y-123) added with x mol% of BaZrO3 (BZO) nanoparticles (x = 0.0, 2.0, 5.0, and 7.0) were synthesized using co-precipitation (COP) and solid-state (SS) method. X-ray diffraction (XRD) patterns showed the formation of Y-123 and Y-211 as the major and minor phases, respectively. The samples prepared using COP method showed higher weight percentage of Y-123 phase (≤98%) compared to the SS samples (≤93%). A peak corresponding to BZO was also found in the samples added with BZO nanoparticles. The increasing intensity of the BZO peak as the BZO amount increased showed the increasing amount of the unreacted nanoparticles in the samples. Refinement of unit cell lattice parameters indicated that all the samples have an orthorhombic crystal structure and there is no orthorhombic-tetragonal phase transformation. As observed using scanning electron microscopy (SEM), all the samples showed randomly distributed grains with irregular shape. The average grain size for the pure sample prepared using COP method is smaller (0.30 µm) compared with that of the pure SS sample (1.24 µm). Addition of 7.0 mol% BZO led to an increase of average grain size to 0.50 μm and 2.71 μm for the COP and SS samples, respectively, indicating grain growth. AC susceptibility (ACS) measurement showed a decrease in the onset critical temperature, Tc-onset with BZO addition. Comparatively, Tc-onset for the COP samples is higher than that of the SS samples. The value of Josephson’s current, Io increased up to 2.0 mol% BZO addition, above which the Io decreased more drastically for the SS samples. The value of Io is 53.95 μA and 32.08 μA for the 2.0 mol% BZO added SS and COP samples, respectively. The decrease of Io is attributed to the distribution of BZO particles at the grain boundaries as also reflected in the drastic decrease of phase lock-in temperature, Tcj. As a result of smaller average grain size, the presence of more grain boundaries containing insulating BZO particles led to lower Io in the COP samples.

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6

Bretos, Iñigo, Theodor Schneller, Martina Falter, Michael Bäcker, Eugen Hollmann, Roger Wördenweber, Leopoldo Molina-Luna, Gustaaf Van Tendeloo, and Oliver Eibl. "Solution-derived YBa2Cu3O7−δ (YBCO) superconducting films with BaZrO3 (BZO) nanodots based on reverse micelle stabilized nanoparticles." Journal of Materials Chemistry C 3, no. 16 (2015): 3971–79. http://dx.doi.org/10.1039/c4tc02543a.

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7

Aye, Moe M., Elmeri Rivasto, Mukarram Z. Khan, H. Rijckaert, H. Palonen, H. Huhtinen, Isabel Van Driessche, and P. Paturi. "Multilayering BZO nanocolumns with different defect densities for YBCO high field applications." New Journal of Physics 23, no. 11 (November 1, 2021): 113031. http://dx.doi.org/10.1088/1367-2630/ac3682.

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Abstract The multilayer structures of alternating superconducting YBCO films doped with different BZO nanocolumn densities were utilized. We show that using 50 nm thick layers increases J c in the whole angular range by maximum 40% as compared with 200 nm single layer BZO-doped or multilayers with smaller thickness. Multilayering is found to be most effective at high magnetic fields and temperatures. These results indicate that demonstrated multilayer structures are extremely attractive for various electrical power applications in the foreseeable future. The experimental outcomes are thoroughly discussed with the mechanisms of crystalline quality and flux pinning in YBCO with different BZO nanorod densities multilayers of varying thicknesses.

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8

Yoo, H. J., C. G. Son, J. H. Yoo, C. K. Park, J. S. Kim, S. G. Park, H. D. Kang, E. H. Choi, G. S. Cho, and G. C. Kwon. "Influence of O2-Plasma Treatment on the Thin Films of H2Post-Treated BZO (ZnO:B)." Journal of the Korean Vacuum Society 19, no. 4 (July 30, 2010): 275–80. http://dx.doi.org/10.5757/jkvs.2010.19.4.275.

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9

MOHANTA, A., S. DASH, and D. BEHERA. "THERMALLY ACTIVATED FLUX CREEP AND CURRENT CONDUCTION IN YBCO + BZO COMPOSITES." International Journal of Modern Physics B 25, no. 03 (January 30, 2011): 387–98. http://dx.doi.org/10.1142/s0217979211057888.

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BaZrO 3 submicron powder obtained from chemical route was added to YBCO for preparation of YBCO + xBZO (x = 0, 1, 2.5, 5, 10 rm wt%) composites samples. The X-ray peak profile analyses and the scanning electron microscopy have indicated that the mean powder size for BZO ranges from 500 to 800 nm. In fact, the presence of BZO brings about a significant modification in the microstructure of the composites. The resistive transition in presence of magnetic field (0–8 T) was investigated. With application of magnetic field, Tc0 decreases significantly, suggesting that grain boundaries (Josephson junctions) are affected more than the grains (Abrikosov junctions). Activation energy is found dependent not only on the particle size, but also on penetration depth and decreases with increasing doping concentration of BZO submicron size particles in contrast to what has been recently observed by M. Safonchik et al. with grain sizes of 40 nm BZO. It has also been observed by H. Shakeripour, M. Akhavan [Supercond. Sci. Technol.14, 234 (2001)] and Gamchi et al. [Phys. Rev. B50, 12950 (1994)] that the activation energy depends not only on the temperature and magnetic field, but also on the doping concentration.

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10

Yang, Ling, Yu Pei Zhang, Ji Wen Xu, and Hua Wang. "Deposition and Characterization of Boron Doped ZnO Thin Films by Ultrasonic Spray Pyrolysis Method." Applied Mechanics and Materials 475-476 (December 2013): 1280–83. http://dx.doi.org/10.4028/www.scientific.net/amm.475-476.1280.

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Boron doped ZnO (BZO) thin films were deposited on glass substrate by ultrasonic spray pyrolysis method using zinc acetylacetonate and boric acid. The structural, morphological, optical and electrical properties of BZO thin films under various doping level of boron and substrate temperature were investigated. The results show that zinc acetylacetonate is helpful to deposit BZO thin films at low temperature. The morphology of grains at low and high substrate temperature is circular and flake-like. The preferred orientation along (101) plane is obvious at 360 °C. The doping level and substrate temperature have remarkable influence on sheet resistance, but little impact on visible transmittance. The optimal sheet resistance of 173 Ω/sq and average visible transmittance of above 80% can be achieved at doping level of 5 at% and growth temperature of 340 °C.

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11

Potdar, H. S., S. B. Deshpande, P. D. Godbole, and S. K. Date. "Synthesis of microcrystalline BaZrO3 via molecular precursor route." Journal of Materials Research 8, no. 5 (May 1993): 948–50. http://dx.doi.org/10.1557/jmr.1993.0948.

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A molecular precursor barium zirconyl oxalate (BZO) was synthesized by exchange reaction between freshly generated water soluble sodium zirconyl oxalate and Ba-nitrate solutions at room temperature. The controlled pyrolysis of BZO in air at 800 °C/6 h resulted in the formation of single-phase cubic microcrystalline barium zirconate powder. These powders exhibit variable-shaped agglomerates with an average size ≍0.2 μm having a surface area ≍2.63 m2/gm.

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12

Baaloudj, Oussama, Noureddine Nasrallah, Hamza Kenfoud, Faisal Algethami, Abueliz Modwi, Ahlem Guesmi, Aymen Amine Assadi, and Lotfi Khezami. "Application of Bi12ZnO20 Sillenite as an Efficient Photocatalyst for Wastewater Treatment: Removal of Both Organic and Inorganic Compounds." Materials 14, no. 18 (September 18, 2021): 5409. http://dx.doi.org/10.3390/ma14185409.

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This work aims to synthesize and characterize a material that can be used as an effective catalyst for photocatalytic application to remove both organic and inorganic compounds from wastewater. In this context, sillenite Bi12ZnO20 (BZO) in a pure phase was synthesized using the sol–gel method. Before calcination, differential scanning calorimetry (DSC) analysis was done to determine the temperature of the formation of the sillenite phase, which was found to be 800 °C. After calcination, the phase was identified by X-ray diffraction (XRD) and then refined using the Rietveld refinement technique. The results prove that BZO crystals have a cubic symmetry with the space group I23 (N°197); the lattice parameters of the structure were also determined. From the crystalline size, the surface area was estimated using the Brunauer-Emmett-Teller (BET) method, which was found to be 11.22 m2/g. The formation of sillenite was also checked using the Raman technique. The morphology of the crystals was visualized using electron scanning microscope (SEM) analysis. After that, the optical properties of BZO were investigated by diffuse reflectance spectroscopy (DRS) and photoluminescence (PL); an optical gap of 2.9 eV was found. In the final step, the photocatalytic activity of the BZO crystals was evaluated for the removal of inorganic and organic pollutants, namely hexavalent chromium Cr(VI) and Cefixime (CFX). An efficient removal rate was achieved for both contaminants within only 3 h, with a 94.34% degradation rate for CFX and a 77.19% reduction rate for Cr(VI). Additionally, a kinetic study was carried out using a first-order model, and the results showed that the kinetic properties are compatible with this model. According to these findings, we can conclude that the sillenite BZO can be used as an efficient photocatalyst for wastewater treatment by eliminating both organic and inorganic compounds.

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13

Tong, Lei, Haibo Li, Wei Ni, Youmin Guo, Qiuju Li, Hong Wang, and Chunchang Wang. "High-temperature colossal dielectric behavior of BaZrO3 ceramics." RSC Advances 7, no. 54 (2017): 33708–13. http://dx.doi.org/10.1039/c7ra06401b.

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14

Malik, Bilal A., K. Asokan, V. Ganesan, Durgesh Singh, and Manzoor A. Malik. "The magnetoresistance of YBCO/BZO composite superconductors." Physica C: Superconductivity and its Applications 531 (December 2016): 85–92. http://dx.doi.org/10.1016/j.physc.2016.11.004.

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15

Sebastian, M. A., C. Ebbing, W. Zhang, J. Huang, H. Wang, S. Chen, B. Gautum, J. Wu, and T. Haugan. "Comparison study of the flux pinning enhancement of YBCO superconductor with BZO and BZO + Y2O3 mixed phase additions." IOP Conference Series: Materials Science and Engineering 279 (December 2017): 012031. http://dx.doi.org/10.1088/1757-899x/279/1/012031.

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16

Picci, Giacomo, Matthew T. Mulvee, Claudia Caltagirone, Vito Lippolis, Antonio Frontera, Rosa M. Gomila, and Jonathan W. Steed. "Anion-Responsive Fluorescent Supramolecular Gels." Molecules 27, no. 4 (February 13, 2022): 1257. http://dx.doi.org/10.3390/molecules27041257.

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Three novel bis-urea fluorescent low-molecular-weight gelators (LMWGs) based on the tetraethyl diphenylmethane spacer—namely, L1, L2, and L3, bearing indole, dansyl, and quinoline units as fluorogenic fragments, respectively, are able to form gel in different solvents. L2 and L3 gel in apolar solvents such as chlorobenzene and nitrobenzene. Gelator L1 is able to gel in the polar solvent mixture DMSO/H2O (H2O 15% v/v). This allowed the study of gel formation in the presence of anions as a third component. An interesting anion-dependent gel formation was observed with fluoride and benzoate inhibiting the gelation process and H2PO4−, thus causing a delay of 24 h in the gel formation. The interaction of L1 with the anions in solution was clarified by 1H-NMR titrations and the differences in the cooperativity of the two types of NH H-bond donor groups (one indole NH and two urea NHs) on L1 when binding BzO− or H2PO4− were taken into account to explain the inhibition of the gelation in the presence of BzO−. DFT calculations corroborate this hypothesis and, more importantly, demonstrate considering a trimeric model of the L1 gel that BzO− favours its disruption into monomers inhibiting the gel formation.

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17

Xiang, Jiahong, Di Wen, Junbo Zhao, Ping Xiang, Yan Shi, and Chunling Ma. "Study of the Metabolic Profiles of “Indazole-3-Carboxamide” and “Isatin Acyl Hydrazone” (OXIZID) Synthetic Cannabinoids in a Human Liver Microsome Model Using UHPLC-QE Orbitrap MS." Metabolites 13, no. 4 (April 18, 2023): 576. http://dx.doi.org/10.3390/metabo13040576.

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Unregulated core structures, “isatin acyl hydrazones” (OXIZIDs), have quietly appeared on the market since China legislated to ban seven general core scaffolds of synthetic cannabinoids (SCs). The fast evolution of SCs presents clinical and forensic toxicologists with challenges. Due to extensive metabolism, the parent compounds are barely detectable in urine. Therefore, studies on the metabolism of SCs are essential to facilitate their detection in biological matrices. The aim of the present study was to elucidate the metabolism of two cores, “indazole-3-carboxamide” (e.g., ADB-BUTINACA) and “isatin acyl hydrazone” (e.g., BZO-HEXOXIZID). The in vitro phase I and phase II metabolism of these six SCs was investigated by incubating 10 mg/mL pooled human liver microsomes with co-substrates for 3 h at 37 °C, and then analyzing the reaction mixture using ultrahigh-performance liquid chromatography-quadrupole/electrostatic field orbitrap mass spectrometry. In total, 9 to 34 metabolites were detected for each SC, and the major biotransformations were hydroxylation, dihydrodiol formation (MDMB-4en-PINACA and BZO-4en-POXIZID), oxidative defluorination (5-fluoro BZO-POXIZID), hydrogenation, hydrolysis, dehydrogenation, oxidate transformation to ketone and carboxylate, N-dealkylation, and glucuronidation. Comparing our results with previous studies, the parent drugs and SC metabolites formed via hydrogenation, carboxylation, ketone formation, and oxidative defluorination were identified as suitable biomarkers.

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18

Erhardt, Camila Stockey, Carlos Pérez Bergmann, and Adriane De Assis Lawisch Rodriguez. "Síntese hidrotermal assistida por microondas do óxido de zinco dopado com bismuto e sua caracterização." Tecno-Lógica 22, no. 2 (July 31, 2018): 207. http://dx.doi.org/10.17058/tecnolog.v22i2.11615.

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O óxido de zinco devido à presença de defeitos intrínsecos possibilita a dopagem com outros materiais, como o bismuto. O BZO (óxido de zinco dopado com bismuto) preparado via síntese hidrotermal assistida por microondas (MAHS) foi estudado por sua concentração de dopante e caracterização morfológica. Os produtos foram caracterizados DRX, MEV e PL; Cálculos de banda gap por espectroscopia de transmissão. Os resultados indicam que as nanoestruturas de BZO foram obtidas com tamanhos de cristalitos variando de 5,82 a 8,37 nm. A mesma estrutura morfológica, tipo flor, foi formada com diferentes concentrações de dopantes. PL demonstra que os defeitos aumentam com a dopagem do bismuto. O intervalo de band gap encontrado foi de 2,79-3,3 eV e tem potencial uso em aplicações de fotodegradação.

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19

Paturi, Petriina, Heikki Palonen, and Hannu Huhtinen. "Properties of Pr-and BZO-doped YBCO Multilayers." Physics Procedia 36 (2012): 661–64. http://dx.doi.org/10.1016/j.phpro.2012.06.263.

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20

Periyasamy, Thirukumaran, Shakila Parveen Asrafali, Chaitany Jayprakash Raorane, Vinit Raj, Divya Shastri, and Seong-Cheol Kim. "Sustainable Chitosan/Polybenzoxazine Films: Synergistically Improved Thermal, Mechanical, and Antimicrobial Properties." Polymers 15, no. 4 (February 17, 2023): 1021. http://dx.doi.org/10.3390/polym15041021.

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Polybenzoxazines (Pbzs) are considered as an advanced class of thermosetting phenolic resins as they overcome the shortcomings associated with novolac and resole type phenolic resins. Several advantages of these materials include curing without the use of catalysts, release of non-toxic by-products during curing, molecular design flexibility, near-zero shrinkage of the cured materials, low water absorption and so on. In spite of all these advantages, the brittleness of Pbz is a knotty problem that could be solved by blending with other polymers. Chitosan (Ch), has been extensively investigated in this context, but its thermal and mechanical properties rule out its practical applications. The purpose of this work is to fabricate an entirely bio-based Pbz films by blending chitosan with benzoxazine (Bzo), which is synthesized from curcumin and furfuryl amine (curcumin-furfurylamine-based Bzo, C-fu), by making use of a benign Schiff base chemistry. FT-IR and 1H-NMR spectroscopy were used to confirm the structure of C-fu. The impact of chitosan on benzoxazine polymerization was examined using FT-IR and DSC analyses. Further evidence for synergistic interactions was provided by DSC, SEM, TGA, and tensile testing. By incorporating C-fu into Ch, Ch-grafted-poly(C-fu) films were obtained with enhanced chemical resistance and tensile strength. The bio-based polymer films produced inhibited the growth of Staphylococcus aureus and Escherichia coli, by reversible labile linkages, expanding Ch galleries, and releasing phenolic species, which was 125 times stronger than bare Ch. In addition, synthesized polybenzoxazine films [Ch/Poly(C-fu)] showed significant dose-dependent antibiofilm activity against S. aureus and E. coli as determined by confirmed by confocal laser scanning microscopy (CLSM). This study suggests that bio-based Ch-graft-polymer material provide improved anti-bacterial property and characteristics that may be considered as a possibility in the near future for wound healing and implant applications.

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21

Chen, Ze, Xiao-dan Zhang, Jun-hui Liang, Jia Fang, Xue-jiao Liang, Jian Sun, De-kun Zhang, Xin-liang Chen, Qian Huang, and Ying Zhao. "Trade-offs of the opto-electrical properties of a-Si:H solar cells based on MOCVD BZO films." Physical Chemistry Chemical Physics 17, no. 1 (2015): 459–64. http://dx.doi.org/10.1039/c4cp04066j.

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Boron-doped zinc oxide (BZO) films, deposited by metal–organic chemical vapor deposition (MOCVD), have been widely used as front electrodes in thin-film solar cells due to their native pyramidal surface structure, which results in efficient light trapping.

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22

Fujimoto, Tomohiro, Yuka Hirata, Hideki Sugimoto, Mayuko Miyanishi, Yoshihito Shiota, Kazunari Yoshizawa, and Shinobu Itoh. "C(sp³)–H bond activation by the carboxylate-adduct of osmium tetroxide (OsO₄)." Dalton Transactions 51, no. 3 (2022): 1123–30. http://dx.doi.org/10.1039/d1dt03819b.

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The carboxylate adducts of OsO4 ([OsO4(X)]−, X− = AcO− and BzO−) were isolated and their structures, physicochemical properties and reactivity were explored. The C(sp3)−H oxygenation mechanism by the carboxylate adducts was discussed based on their kinetics and DFT studies.

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23

Asrafali, Shakila Parveen, Thirukumaran Periyasamy, Chaitany Jayprakash Raorane, Vinit Raj, and Seong Cheol Kim. "The Thermo-Mechanical and Dielectric Properties of Superhydrophobic Pbz/TiO2 Composites." Sustainability 14, no. 20 (October 18, 2022): 13401. http://dx.doi.org/10.3390/su142013401.

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Polymer composites display the synergistic property of the polymer (matrix) and inorganic particles (filler material), when their combination is properly utilized. In the present work, polymer composites possessing a superhydrophobic property are fabricated by imposing the combination of both surface free energy and surface roughness. Polybenzoxazine (Pbz) is a choice of low surface free energy material and TiO2 particles contribute to create surface roughness. Thus, Pbz/TiO2 composites were fabricated by varying TiO2 contents to produce superhydrophobicity. The hydrophobicity increased from 94° for Pbz to 140° for Pbz/T5. The advantage of molecular design flexibility is also utilized to synthesize benzoxazine monomer (Bzo), which then undergoes thermally induced self-polymerization with different contents of TiO2 to produce Pbz-TiO2 composites. The structure analysis and curing behavior of the Bzo monomer was examined using FT-IR, NMR and DSC techniques. Whereas the properties of the Pbz/TiO2 composites were analyzed by WCA, SEM, DMA, TGA, and dielectric techniques.

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Zhou, H. C., Y. X. Zhou, Yu Qiu, and Jun Zhu. "Enhanced charge storage capability of (Bi2O3)0.4(ZrO2)0.6 charge trapping layer in nanocrystal memory devices." Functional Materials Letters 12, no. 04 (August 2019): 1950046. http://dx.doi.org/10.1142/s1793604719500462.

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A structure of p-Si/Al2O3/(Bi2O3)[Formula: see text](ZrO2)[Formula: see text](BZO)/Al2O3/Pt has been fabricated as Nanocrystal Charge Trapping Memory (NCTM), where the double nanocrystals (NCs) of Bi2O3 and ZrO2 generated in BZO charge trapping layer (CTL) through rapid temperature annealing (RTA). A large memory window (MW) of [Formula: see text]8.6[Formula: see text]V and high defect traps of [Formula: see text][Formula: see text]cm[Formula: see text] were obtained at a low sweeping voltages of [Formula: see text]8[Formula: see text]V after 800∘C for 90[Formula: see text]s in O2 ambient. The devices of different RTA conditions were investigated to analyze the process of NCs traps formation by the X-ray diffraction and X-ray photoelectron spectroscopy. Excellent retention characteristics of the room temperature were observed after 104[Formula: see text]s because of the deep defect traps and high quantum wells between CTL and tunneling oxide layer (TOL).

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25

Klejch, Tomáš, Jan Slavíček, Oldřich Hudeček, Václav Eigner, Natalia Andrea Gutierrez, Petra Cuřínová, and Pavel Lhoták. "Calix[4]arenes containing a ureido functionality on the lower rim as highly efficient receptors for anion recognition." New Journal of Chemistry 40, no. 9 (2016): 7935–42. http://dx.doi.org/10.1039/c6nj01271j.

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Calix[4]arenes bearing diaryl urea moieties with electron-withdrawing substituents on both sides can bind selected anions (AcO⁻, BzO⁻, H₂PO₄⁻) even in highly competitive solvents such as DMSO-d₆.

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26

Gautam, Bibek, Mary Ann Sebastian, Shihong Chen, Timothy Haugan, Yanbin Chen, Zhongwen Xing, Joseph Prestigiacomo, Mike Osofsky, and Judy Wu. "Towards Isotropic Vortex Pinning in YBCO Films with Double-doping BHO-Y2O3and BZO-Y2O3Artificial Pining Centers." IOP Conference Series: Materials Science and Engineering 279 (December 2017): 012030. http://dx.doi.org/10.1088/1757-899x/279/1/012030.

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Yoshimoto, T., G. Goto, M. Mukaida, R. Terasnishi, N. Mori, K. Yamada, S. Funaki, et al. "An Attempt to Arrange BZO Nanorods Into ErBCO Thin Films." IEEE Transactions on Applied Superconductivity 19, no. 3 (June 2009): 3420–22. http://dx.doi.org/10.1109/tasc.2009.2018759.

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28

Huhtinen, H., K. Schlesier, and P. Paturi. "Growth andc-axis flux pinning of nanostructured YBCO/BZO multilayers." Superconductor Science and Technology 22, no. 7 (June 10, 2009): 075019. http://dx.doi.org/10.1088/0953-2048/22/7/075019.

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29

Miu, L., I. Ivan, D. Miu, P. Mele, K. Matsumoto, P. Mikheenko, V. S. Dang, and A. Crisan. "High Vortex Depinning Temperatures in YBCO Films with BZO Nanorods." Journal of Superconductivity and Novel Magnetism 26, no. 4 (December 22, 2012): 1167–73. http://dx.doi.org/10.1007/s10948-012-2019-x.

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30

Markovic, Zoran, Bogdan Solaja, Dragan Milic, Ivan Juranic, and Miroslav Gasic. "Molecular orbital study of the oxidation of steroidal phenols into quinols and epoxyquinols." Journal of the Serbian Chemical Society 65, no. 7 (2000): 491–96. http://dx.doi.org/10.2298/jsc0007491m.

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The MO study showed that the radical oxidation of phenols into quinols occurs readily. Further radical oxidation (in the m-CPBA/(BzO)2/hv system) of quinols occurs through appropriate biradical species with an activation energy of 79.5 kJ/mol yielding syn-epoxyquinols. The stereochemical outcome presented in this study is in full agreement with the experimental results.

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31

Reuter, Hans, and Coco K. Y. A. Okio. "Crystal structure of bis(benzoato-κO)dibutyltin(IV), nBu2Sn(bzo)2." Acta Crystallographica Section E Crystallographic Communications 72, no. 7 (June 3, 2016): 897–900. http://dx.doi.org/10.1107/s2056989016008604.

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The title compound, [Sn(C4H9)2(C6H5COO)2], was synthesized in order to study the interaction between di-n-butyltin(IV) oxide and some carboxylic acids. Di-n-butyltin(IV) dibenzoate, nBu2Sn(obz)2, exhibits the same structural features as other diorganotin(IV) dibenzoates characterized by an unsymmetrical bidentate bonding mode [Δ(Sn—O) ≃ 0.4 Å] of the two benzoate groups to tin. In a first approximation, the coordination sphere at tin resulting from the two stronger bonded O atoms [2.1227 (17) and 2.1405 (16) Å] and the two α-C atoms of then-butyl groups [2.125 (3) and 2.129 (2) Å] is compressed to a tetragonal disphenoid [〈(C—Sn—C) = 148.2 (1)° and 〈(O—Sn—O) = 82.01 (6)°]. This coordination sphere is expanded by the less strongly bonded two O atoms [2.507 (2) and 2.485 (2) Å] to a substantially distorted octahedron and by a weak intermolecular Sn...O interaction [2.943 (2) Å] to a pentagonal bipyramid with the formation of centrosymmetric dimers. The unbranched butyl groups adopt two different conformations:anti–gauche[torsion angles: 166.0 (2)–63.9 (4)°] andgauche–gauche[65.0 (3)–56.3 (3)°]. Intermolecular interactions between the dimers are restricted to O...H—C contacts (2.64 Å) and van der Waals interactions.

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32

Nakamura, T., K. Nakahata, M. Yoshizumi, T. Izumi, Y. Shiohara, K. Kimura, T. Hasegawa, T. Kato, and T. Hirayama. "Development of BZO Doped YGdBCO Thick Films Using TFA-MOD Process." Physics Procedia 45 (2013): 153–56. http://dx.doi.org/10.1016/j.phpro.2013.04.075.

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Bartolomé, E., A. Palau, A. Llordés, T. Puig, and X. Obradors. "Vortex oscillations in TFA-grown YBCO thin-films with BZO nanoparticles." Physica C: Superconductivity 470, no. 22 (December 2010): 2033–39. http://dx.doi.org/10.1016/j.physc.2010.09.009.

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34

Torokhtii, Kostiantyn, Nicola Pompeo, Anna Frolova, Valentina Pinto, Achille Angrisani Armenio, Laura Piperno, Giuseppe Celentano, et al. "Microwave Measurements of Pinning Properties in Chemically Deposited YBCO/BZO Films." IEEE Transactions on Applied Superconductivity 27, no. 4 (June 2017): 1–5. http://dx.doi.org/10.1109/tasc.2016.2634328.

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35

Schlesier, K., H. Huhtinen, P. Paturi, Y. P. Stepanov, and R. Laiho. "Structural and Superconducting Properties of Undoped and BZO-doped GdBCO Thin Films." IEEE Transactions on Applied Superconductivity 19, no. 3 (June 2009): 3407–11. http://dx.doi.org/10.1109/tasc.2009.2017766.

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36

Garcés, P., M. Coll, H. Castro, T. Puig, and X. Obradors. "Preparation of YBCO-BYTO and YBCO-BZO nanostructured superconducting films by chemical method." Journal of Physics: Conference Series 786 (January 2017): 012017. http://dx.doi.org/10.1088/1742-6596/786/1/012017.

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37

Nakamura, T., M. Yoshizumi, T. Izumi, Y. Shiohara, K. Kimura, and T. Hasegawa. "Development of BZO Doped YGdBCO High Performance Long CCs Using TFA-MOD Process." Physics Procedia 58 (2014): 146–49. http://dx.doi.org/10.1016/j.phpro.2014.09.027.

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38

Galluzzi, V., A. Augieri, T. Petrisor, L. Ciontea, G. Celentano, A. Mancini, A. Vannozzi, A. A. Angrisani, and A. Rufoloni. "Deposition and characterization of YBCO films with BZO inclusions on single crystal substrate." Physica C: Superconductivity and its Applications 470 (December 2010): S142—S144. http://dx.doi.org/10.1016/j.physc.2010.01.034.

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39

Jan, Tariq, Sohail Azmat, Bareera Wahid, M. Adil, Hussain Alawadhi, Qaisar Mansoor, Zahid Farooq, S. Z. Ilyas, Ishaq Ahmad, and Muhammad Ismail. "Chemically synthesized ZnO-Bi2O3 (BZO) nanocomposites with tunable optical, photoluminescence and antibacterial characteristics." Materials Science in Semiconductor Processing 84 (September 2018): 71–75. http://dx.doi.org/10.1016/j.mssp.2018.05.007.

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40

Rambe, Robiatun, Urip Harahap, and Citra Julita Tarigan. "INFLUENCE OF DOSAGE ON RETENTION IN PATIENTS METHADONE MAINTENANCE THERAPY PROGRAM FOR MAINTENANCE PHASE OF H. ADAM MALIK MEDAN CENTRAL GENERAL HOSPITAL." Asian Journal of Pharmaceutical and Clinical Research 11, no. 8 (August 7, 2018): 244. http://dx.doi.org/10.22159/ajpcr.2018.v11i8.24743.

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Objective: This study aims to see the effect of methadone dose on patient retention in following the program.Materials and Methods: This study is a clinical study with cross-sectional study design. Data obtained from the patient’s medical record and patient’s primary data. The study was conducted at Methadone Clinic of H.Adam Malik Hospital Medan. Results: The number of research samples is injecting drug users who follow PTRM as many as 39 people. From a study of 39 patients, the percentage of male patients (100%) was obtained; age between 25 and 35 years (64.1%); junior high school education equal to 84.6%; already married 46.2%; already working 69.2%; and the distance of the average residence with the clinic is 16.93 km. The results showed that the smallest maintenance dose of maintenance phase was 2 mg; the largest maintenance dose in the maintenance phase was 165 mg; the mean maintenance stage dose of 62.35 mg with a retention value >2 years or more (>730 days) was 79.5%.Conclusion: There was a significant effect on retention which is the biggest maintenance dose with p=0.04 value and take home dose with p=0.027. Percentage of drug use and other substances that is benzodiazepines (BZO) (64,1%); amphetamines (AMP) (38.5%); methamphetamine (MET) (20.5%); and THC (20.5%). There was no significant effect between the use of other substance to retention with p value of BZO (0.389); p AMP (0.360); p MET (0.195); and p THC (0.470). It can be concluded that the greater the dose of methadone has an effect on its retention.

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41

Gautam, Bibek, Mary Ann Sebastian, Shihong Chen, Jack Shi, Timothy Haugan, Zhongwen Xing, Wenrui Zhang, et al. "Transformational dynamics of BZO and BHO nanorods imposed by Y2O3 nanoparticles for improved isotropic pinning in YBa2Cu3O7-δ thin films." AIP Advances 7, no. 7 (July 2017): 075308. http://dx.doi.org/10.1063/1.4991051.

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42

Razaeian, Mohsen, Maryam Mohammadi, Malihe Akbari, and Maryam Maleki. "The Most Common Method of Suicide in Tehran 2000–2004." Crisis 29, no. 3 (May 2008): 164–66. http://dx.doi.org/10.1027/0227-5910.29.3.164.

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The likelihood of completing suicide depends to some extent on knowledge of effective means and also on the availability and/or acceptability of such methods. Since studying suicide methods may have an implication for prevention, the focus of this study was on the most favored method of suicide in Tehran, Iran. The study uses confirmed suicide data provided by the Beheshet Zahra Organization (BZO), which gathers all mortality data within Tehran and enters them into a computerized database, from which the relevant information for all the recorded suicide cases during the year 2000 to 2004 were obtained and analyzed. There were 703 cases of suicide (632 males and 71 females) in the BZO database, with a sex ratio of 8.9. The mean (standard deviation) of age at suicide for those who chose hanging and for those who have chosen other methods of suicide were 33.93 (14.2) and 34.60 (13.4) years, respectively. Hanging was the method favored by 572 (85.9%) of cases. Use of hanging was higher in females (61, 85.9%) than in males (511, 80.9%), and higher among the married (304, 53.6%) than among singles (268, 46.4%). The high proportion of persons using hanging as a method of suicide in Tehran may reflect the fact that this method is more acceptable and/or easily available and/or less likely to be misclassified as accidental or undetermined death. The prevention of such suicides is extremely difficult in the general population. Therefore, it is suggested that, to prevent suicide by hangings, the authorities should focus on the causal factors of suicide rather than on the acceptability and/or the availability of this method.

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43

Pomar, A., V. R. Vlad, A. Llordes, A. Palau, J. Gutierrez, S. Ricart, T. Puig, X. Obradors, and A. Usoskin. "Enhanced Vortex Pinning in YBCO Coated Conductors With BZO Nanoparticles From Chemical Solution Deposition." IEEE Transactions on Applied Superconductivity 19, no. 3 (June 2009): 3258–61. http://dx.doi.org/10.1109/tasc.2009.2018422.

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44

Augieri, A., V. Galluzzi, G. Celentano, A. A. Angrisani, A. Mancini, A. Rufoloni, A. Vannozzi, et al. "Transport Property Improvement by Means of BZO Inclusions in PLD Grown YBCO Thin Films." IEEE Transactions on Applied Superconductivity 19, no. 3 (June 2009): 3399–402. http://dx.doi.org/10.1109/tasc.2009.2019253.

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45

Palau, A., A. Llordes, M. Gibert, T. Puig, A. Pomar, and X. Obradors. "Pinning Landscape Analysis in YBCO Films With Epitaxial and/or Non-Coherent BZO Nanoparticles." IEEE Transactions on Applied Superconductivity 21, no. 3 (June 2011): 3243–46. http://dx.doi.org/10.1109/tasc.2010.2092408.

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46

Huhtinen, H., M. Irjala, P. Paturi, J. C. Grivel, Y. Y. Tse, M. Falter, J. Eickemeyer, and Y. Zhao. "Growth and BZO-doping of the nanostructured YBCO thin films on buffered metal substrates." Physica C: Superconductivity and its Applications 470 (December 2010): S1013—S1015. http://dx.doi.org/10.1016/j.physc.2010.02.088.

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47

Huhtinen, H., M. Peurla, M. A. Shakhov, Yu P. Stepanov, P. Paturi, J. Raittila, R. Palai, and R. Laiho. "Superconducting Properties of Films Deposited From Micro-, Nanocrystalline and Optimally BZO-Doped YBCO Targets." IEEE Transactions on Applied Superconductivity 17, no. 2 (June 2007): 3620–23. http://dx.doi.org/10.1109/tasc.2007.899572.

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48

Wang, Feng, and Hongxia Tian. "BaZrO3 (BZO) nanoparticles as effective pinning centers for YBa2Cu3O7 − δ (YBCO) superconducting thin films." Journal of Materials Science: Materials in Electronics 30, no. 4 (January 11, 2019): 4137–43. http://dx.doi.org/10.1007/s10854-019-00705-6.

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49

Campos Covarrubias, Monica Susana, Mantas Sriubas, Kristina Bockute, Aurelija Poskaite, Rokas Vazgys, Maria Gazda, and Giedrius Laukaitis. "Properties on Yttrium-Doped/Undoped Barium Cerate and Barium Zirconate Thin Films Formed by E-Beam Vapor Deposition." Applied Sciences 12, no. 13 (June 24, 2022): 6422. http://dx.doi.org/10.3390/app12136422.

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As electrolyte materials for proton conductive fuel cells, perovskite-type materials such as barium cerates and barium zirconates have received a lot of attention due to their high protonic conduction at intermediate temperatures. Yet, the crystalline structure and the microstructure of the electrolyte layers are of the utmost importance that define the resulting protonic conductivity. The aim of this research was to investigate the formation of doped/undoped BCO and BZO thin films using e-beam vapor deposition and to analyze the influence of the formation parameters on the microstructural and crystallographic properties. Crystalline structure and microstructure were investigated by X-ray diffractometer and scanning electron microscope, while the elemental composition of the resulting thin films was analyzed by an energy-dispersive X-ray spectroscope. It was found that the formed thin films were highly dense and consisted of the oriented columnar grains. The crystallinity of the thin films was strongly expressed with the predominant crystallographic orientations for undoped/doped barium cerates. Yttrium dopant had an influence on the lattice parameters and crystallite sizes. With the chosen technological parameters allowed to both, barium cerates and barium zirconates did not form carbonates and did not experience the degradation process.

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50

Ohshima, Shigetoshi. "Hetero-Epitaxial Growth of YBCO and MgB2 Thin Films on Decorated Substrates with Nano-Wires and Nano-Particles." MRS Proceedings 1454 (2012): 105–14. http://dx.doi.org/10.1557/opl.2012.1485.

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ABSTRACTSuperconducting NMR pickup coils have to have a low surface resistance (Rs) under a high magnetic field. One way of reducing the Rs of superconducting thin films is adding artificial pins to the films. We examined the hetero-epitaxial growth of MgB2and YBCO thin films on decorated sapphire and MgO substrates while using nano-wires and nano-particles to add pins to the films.We used ZnO nano-wire to add artificial grain boundary pins to MgB2 films. The tilted c-plane sapphire substrate with nano-step edges was used for these substrates. The terrace width with one lattice step edge can be controlled by changing the tilt angle. AFM images showed that the tilted c-plane sapphire substrate had straight nano-step edges. ZnO nono-wires were decorated on the nano-step edges by MOCVD, and then deposited on MgB2 films by sputtering. The Rs of the films was then measured with a sapphire rod resonator. The Rs of MgB2 thin films fabricated on the tilted c-plane sapphire substrate with ZnO nano-wires was lower than that of MgB2thin films on a conventional sapphire substrate under a high magnetic field.We used BaZrO3(BZO) nano-particles to add the artificial pins to YBCO thin films. The BZO particles on the MgO substrates were fabricated by laser deposition. The size and density of these particles were controlled with a pulse number of laser shot. YBCO thin films were formed on decorated MgO substrate by laser deposition. The Rs of YBCO thin films on the decorated MgO substrate was lower than that of the YBCO films formed on a conventional MgO substrate under a high magnetic field.We clarified that artificial pins in MgB2and YBCO thin films are useful for decreasing the Rs under a high magnetic field.

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