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Journal articles on the topic 'Bi Metallic'

Author: Grafiati
Published: 4 June 2021
Last updated: 31 January 2023

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1

Mohan, Santhanam, and Manickam Vishnu Devan. "Photocatalytic activity of Ag/Ni bi-metallic nanoparticles on textile dye removal." Green Processing and Synthesis 8, no. 1 (January 28, 2019): 895–900. http://dx.doi.org/10.1515/gps-2019-0060.

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Abstract The photocatalysis of Ag/Ni bi-metallic nano-particles on safranin O dye degradation was evaluated by UV light irradiations. Ag/Ni bi-metallic nanoparticles were synthesized by the green approach using Zingiber officinale root (Zinger) extract. The average particles size of Ag/Ni bi-metallic nanoparticles was found to be 70-88 nm from SEM image and from XRD patterns it was confirmed that the existence of Ag/Ni bi-metallic nano-particles. 8 mg of Ag/Ni bi-metallic nanoparticles present in 40 mL of 10 ppm dye, degraded completely in presence of UV light irradiations within 30 min time durations. The effect of dye degradation within a short period of time (30 min) was due to wide band gap energy and photochemical redox reactions.
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2

Arčon, Iztok, Stefano Paganelli, Oreste Piccolo, Michele Gallo, Katarina Vogel-Mikuš, and Franco Baldi. "XAS analysis of iron and palladium bonded to a polysaccharide produced anaerobically by a strain ofKlebsiella oxytoca." Journal of Synchrotron Radiation 22, no. 5 (July 16, 2015): 1215–26. http://dx.doi.org/10.1107/s1600577515010371.

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Klebsiella oxytocaBAS-10 ferments citrate to acetic acid and CO2, and secretes a specific exopolysaccharide (EPS), which is able to bind different metallic species. These biomaterials may be used for different biotechnological purposes, including applications as innovative green biogenerated catalysts. In production of biogenerated Pd species, the Fe(III) as ferric citrate is added to anaerobic culture ofK. oxytocaBAS-10, in the presence of palladium species, to increase the EPS secretion and improve Pd-EPS yield. In this process, bi-metallic (FePd-EPS) biomaterials were produced for the first time. The morphology of bi-metallic EPS, and the chemical state of the two metals in the FePd-EPS, are investigated by transmission electron microscopy, Fourier transform infra-red spectroscopy, micro-X-ray fluorescence, and X-ray absorption spectroscopy methods (XANES and EXAFS), and compared with mono-metallic Pd-EPS and Fe-EPS complexes. Iron in FePd-EPS is in the mineralized form of iron oxides/hydroxides, predominantly in the form of Fe3+, with a small amount of Fe2+in the structure, most probably a mixture of different nano-crystalline iron oxides and hydroxides, as in mono-metallic Fe-EPS. Palladium is found as Pd(0) in the form of metallic nanoparticles with face-centred cubic structure in both bi-metallic (FePd-EPS) and mono-metallic (Pd-EPS) species. In bi-metallic species, Pd and Fe nanoparticles agglomerate in larger clusters, but they remain spatially separated. The catalytic ability of bi-metallic species (FePd-EPS) in a hydrodechlorination reaction is improved in comparison with mono-metallic Pd-EPS.
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3

Mattei, J. G., F. Pelletier, D. Ciuculescu, P. Lecante, C. Amiens, and M. J. Casanove. "Development of Bi-Metallic Fe—Bi Nanocomposites: Synthesis and Characterization." Journal of Nanoscience and Nanotechnology 12, no. 11 (November 1, 2012): 8640–46. http://dx.doi.org/10.1166/jnn.2012.6475.

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4

Essa, K., I. Kacmarcik, P. Hartley, M. Plancak, and D. Vilotic. "Upsetting of bi-metallic ring billets." Journal of Materials Processing Technology 212, no. 4 (April 2012): 817–24. http://dx.doi.org/10.1016/j.jmatprotec.2011.11.005.

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5

VandeLune, Christian, Tutku Tazegul, Samuel J Ahrenholz, Caleb Iehl, Victoria Vivtcharenko, Eli Schmidt, Kevin N Dibbern, et al. "Implant-related artifacts around metallic and bio-integrative screws: a CT scan 3D Hounsfield unit assessment." Journal of the Foot & Ankle 15, no. 2 (August 31, 2021): 95–99. http://dx.doi.org/10.30795/jfootankle.2021.v15.1562.

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Objective: To assess the degree of implant-related artifacts (IRA) around metallic and bio-integrative (BI) cannulated screws using Hounsfield units (HU) on computed tomography (CT). Our hypothesis was that BI implants would demonstrate significantly decreased IRA around the inserted screws. Methods: In this cadaveric CT imaging study, we used 2 below-knee specimens. Medial displacement calcaneal osteotomy was performed, and the specimens were fixed with either metallic or BI screws. HU values were measured over 4 different lines that crossed the osteotomy position. Results: The mean HU value was decreased in the BI implants compared to the metallic ones in 3 different positions: near the screw, directly over the screw, and inside the screw cannula. At the line placed 1 cm dorsal to the screw, the HU value for the metallic screw was lower than that for the BI screw. Conclusions: We found metallic implants to demonstrate significantly increased HU values in regions close to the implant and significantly decreased values 1 cm away from the implant, when compared to the BI screw. The decreased HU values 1 cm away from the implant could be due to a shielding effect of the surrounding bone, hindering the assessment of union and healing. BI implants represent an alternative to decrease these IRA effects. Level of Evidence III; Case-Control Study.
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6

Li, You Tang, and Chang Feng Yan. "Fracture Design of Metallic Matrix Crack for Bi-Materials." Key Engineering Materials 306-308 (March 2006): 7–12. http://dx.doi.org/10.4028/www.scientific.net/kem.306-308.7.

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The fracture designs of metallic matrix crack for bi-materials were studied. The stress field and displacement field of plane matrix crack was setup at first. Then the finite element method is used to analyses the stress singularity of matrix cracks between different materials. The solutions of stress singularity of a cracked bi-materials beam under uniform tension, and the three-point bending of bi-materials specimen were computed. The result lays a theoretic and applied foundation for the practical engineering application of metallic matrix crack for bi-materials.
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7

Siddiqui, Muhammad Kamran, Yu-Ming Chu, Muhammad Nasir, and Murat Cancan. "On analysis of thermodynamic properties of cuboctahedral bi-metallic structure." Main Group Metal Chemistry 44, no. 1 (January 1, 2021): 117–28. http://dx.doi.org/10.1515/mgmc-2021-0014.

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Abstract Porous materials, for example, metalnatural structures (MOFs) and their discrete partners metalnatural polyhedra (MOPs), that are built from coordinatively unsaturated inorganic hubs show incredible potential for application in gas adsorption/partition cycles, catalysis, and arising openings in hardware, optics, detecting, and biotechnology. A well-known hetero-bimetallic metalorganic polyhedra of this discrete partners metalnatural polyhedra (MOPs) class is cuboctahedral bi-metallic stricture. In this paper, we discuss the stricture of Hetero-bimetallic metalorganic polyhedra (cuboctahedral bi-metallic). Also, we computed the topological indices based on the degree of atoms in this cuboctahedral bi-metallic structure.
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8

Reddy, Naveen Krishna, Ljiljana Palangetic, Linda Stappers, Johan Buitenhuis, Jan Fransaer, and Christian Clasen. "Metallic and bi-metallic Janus nanofibers: electrical and self-propulsion properties." Journal of Materials Chemistry C 1, no. 23 (2013): 3646. http://dx.doi.org/10.1039/c3tc30176a.

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9

Zhang, Haifeng, Aimin Wang, Hong Li, Wensheng Sun, Bingzhe Ding, Zhuangqi Hu, Hongnian Cai, Lu Wang, and Wen Li. "Quasi-static compressive property of metallic glass/porous tungsten bi-continuous phase composite." Journal of Materials Research 21, no. 6 (June 1, 2006): 1351–54. http://dx.doi.org/10.1557/jmr.2006.0166.

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A metallic glass/porous tungsten bi-continuous phase composite was prepared by pressure infiltration whose quasi-static compressive stress and strain to macroscopic failure are much higher than those of all the previous tungsten-reinforced metallic glass matrix composites. It deserves to be mentioned that because of its high-yield strength and high elastic strain limit, metallic glass seems to be used as the reinforcement to strengthen the crystalline materials in the bi-continuous phase composite materials.
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10

Politis, Denis J., Nicholas J. Politis, Jianguo Lin, Trevor A. Dean, and Daniel S. Balint. "An analysis of the tooth stress distribution of forged bi-metallic gears." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 232, no. 1 (October 25, 2016): 124–39. http://dx.doi.org/10.1177/0954406216675638.

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The work described in this paper is an evaluation of the contact characteristics of bi-metallic gears forged through a novel bi-metallic gear forging process. Finite element analysis of the contact characteristics of single material gears was first performed to validate the tooth contact and tooth root stresses with empirical American Gear Manufacturers Association and British Standard standards. Having verified the validity of the model, simulations were performed for gears comprising lightweight cores with teeth bounded by steel bands of uniform thicknesses, 1 mm, 2 mm, 4 mm, and 6 mm to evaluate the differences in stress distribution and compare to single material gear teeth. The forged profiles obtained experimentally by utilising 2 mm, 4 mm, and 6 mm thickness bands via the bi-metallic gear forging process are also discussed. The uniform thickness model is subsequently adapted to incorporate the experimental forged profiles in order to estimate the contact stress, root stress, and stress distribution within the teeth to identify performance differences between bi-metallic forged gears and traditional single material gears.
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11

Cheng, Guangming, and Yong Zhu. "Tensile detwinning in bi-twinned metallic nanowires." Microscopy and Microanalysis 27, S1 (July 30, 2021): 1488–90. http://dx.doi.org/10.1017/s1431927621005481.

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12

Stasyuk, Natalia Ye, Galina Z. Gayda, Roman Ja Serkiz, and Mykhailo V. Gonchar. "Cell Imaging with Fluorescent Bi-Metallic Nanoparticles." JOURNAL OF ADVANCES IN CHEMISTRY 11, no. 4 (March 9, 2015): 3499–511. http://dx.doi.org/10.24297/jac.v11i4.6694.

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Last decades various imaging techniques have been applied in biological and biomedical research, such as magnetic resonance imaging, different types of tomography, fluorescence/bioluminescence, ultrasound, as well as multimodality approaches. Fluorescence imaging, especially in combination with nanoscale materials, is a very prospective tool for experiments in vivo and clinical applications due to its high temporal and spatial resolutions. Fluorescent nanoparticles (NPs), having ability to interact with biomolecules both on the surface of and inside the cells, may revolutionize the cell imaging approaches for diagnostics and therapy. In our investigation we report about new method of cell imaging with fluorescent bi-metallic NPs synthesized by chemical reduction of the relevant ions. As the model of living organism, the cells of yeast Hansenula polymorpha were used. All NPs in minimal concentration (up to 0.05 mM) was proved to be non-toxic for yeast cells. The NPs and NPs-modified cells were characterized with the methods of UV-VIS spectroscopy, scanning electron microscopy, atom force microscopy, transmission electron microscopy and fluorescence microscopy. The bimetallic NPs, possessing the stable fluorescence in solution and inside the cells, allow to observe the phenomenon of NPs transferring from parental to daughter cells through at least three generations followed by releasing from the modified cells. The fluorescent NPs synthesized being small, non-toxic and fluorescent was shown to be perspective tool for cell imaging.
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13

Faidy, C., G. Chas, S. Bhandari, M. P. Valeta, R. Hurst, A. Youtsos, P. Nevasmaa, W. Brocks, D. Lidbury, and C. Wiesner. "BIMET: structural integrity of bi-metallic components." Nuclear Engineering and Design 209, no. 1-3 (November 2001): 79–85. http://dx.doi.org/10.1016/s0029-5493(01)00390-9.

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14

Homma, H., Y. Kanto, T. Kubo, and Y. Tanaka. "Crack growth resistance in bi-metallic weldment." International Journal of Pressure Vessels and Piping 63, no. 3 (January 1995): 225–36. http://dx.doi.org/10.1016/0308-0161(94)00034-g.

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15

Rasgado, M. T. Alonso, K. Davey, L. D. Clark, and S. Hinduja. "Bi-metallic dies for rapid die casting." Journal of Materials Processing Technology 175, no. 1-3 (June 2006): 109–16. http://dx.doi.org/10.1016/j.jmatprotec.2005.04.069.

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16

Liu, Peng Fei, Meng Yang Zu, Li Rong Zheng, and Hua Gui Yang. "Bismuth oxyiodide microflower-derived catalysts for efficient CO2 electroreduction in a wide negative potential region." Chemical Communications 55, no. 82 (2019): 12392–95. http://dx.doi.org/10.1039/c9cc05089b.

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BiOI microflower derived electrocatalysts, consisting of oxidized Bi2O2CO3 and metallic Bi with local shortened inter-layer Bi–Bi bonds, showed over 90% formate faradaic efficiency in a wide negative potential region.
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17

Pei, Jiajing, Junjie Mao, Xin Liang, Chen Chen, Qing Peng, Dingsheng Wang, and Yadong Li. "Ir–Cu nanoframes: one-pot synthesis and efficient electrocatalysts for oxygen evolution reaction." Chemical Communications 52, no. 19 (2016): 3793–96. http://dx.doi.org/10.1039/c6cc00552g.

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18

Jia, Wen, Dong Peng, Zijuan Feng, Xue Wu, Yi Liu, Xuxu Zheng, and Xiaoya Yuan. "UV-light-assisted green preparation of Bi/BiOBr/RGO composites with oxygen vacancies toward enhanced photocatalytic removal of organic dye." New Journal of Chemistry 44, no. 19 (2020): 7749–57. http://dx.doi.org/10.1039/d0nj01296c.

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19

Netto, Cesar de Cesar, Nacime S. Mansur, Tutku Tazegul, Matthieu Lalevee, Hee Young Lee, Andrew Behrens, Francois Lintz, Alexandre L. Godoy-Santos, Kevin N. Dibbern, and Donald D. Anderson. "Implant Related Artifact Around Metallic and Bio-Integrative Screws: A CT Scan 3D Hounsfield Unit Assessment." Foot & Ankle Orthopaedics 7, no. 1 (January 2022): 2473011421S0017. http://dx.doi.org/10.1177/2473011421s00174.

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Category: Basic Sciences/Biologics; Hindfoot Introduction/Purpose: Implant-related artifact (IRA) represents an important limitation in Computed Tomography (CT) assessment of osteotomy and fracture healing, bone-implant integration, and success of fusion procedures. Metallic implants are the most used in foot and ankle surgery and are recognized as important IRA generators. Absorbable and bio-integrative (BI) implants are attractive options for bone fixation when postoperative CT imaging is likely, particularly in procedures with higher risk for nonunion. However, the literature comparing IRA with metallic and BI implants is scarce. The objective of this study was to assess the degree of IRA around metallic and BI cannulated screws. Our hypothesis was that BI implants would demonstrate significantly decreased IRA around the inserted screws. Methods: In this cadaveric/CT imaging study, 2 below-knee specimens were used. Medial displacement calcaneal osteotomy was performed through a 5-cm long lateral heel approach. Calcaneal tuberosity was displaced medially by 10mm and fixed provisionally with 2 parallel K-wires under fluoroscopic guidance. Specimens were fixed with two headless 4.0 millimeters cannulated screws, either metallic or BI. Cone-beam CT imaging of both specimens was acquired following osteotomy screw fixation (120kVp, 5.5mA, 0.25mm isotropic). Using a dedicated software, the overall dispersion of Hounsfield units (HU) in a 3D cube of 30mm edge length was assessed. Four HU lines were then traced parallel to the screws, crossing the osteotomy site. Lines 1, 2, 3 and 4 were positioned respectively: In close proximity, over, inside the cannulation and away from the implant. The HU dispersion in these lines was measured and compared between metallic and BI implanted specimens, using T-tests/Wilcoxon analysis. P-values<0.05 were considered significant. Results: When compared to the BI implant, the average HU was pronouncedly and significantly increased around metallic implants in the lines with more close proximity (Line 1), over the screw wall (Line 2) and inside the screw cannulation (Line 3), when considering both the whole line extension inside the 3D cube as well as in a selected 8mm line-segment across the calcaneal osteotomy line: Line 1 (entire, 7.26 vs -159; selected, -5 vs -249) Line 2 (entire, 4.846 vs 108; selected, 6286 vs 151.2); Line 3 (entire, 1664 vs 144; selected, -277.7 vs 198.7) selected). However, across Line 4 (away from the implant), the HU dispersion was interestingly and significantly decreased around the metallic implant (entire, -49 vs 178.5; selected, -110 vs 221), potentially as result of beam hardening artifact, concentrating HU close to the metal, and shielding the surrounding cancellous bone from being accurately reconstructed. Conclusion: In this cadaveric imaging study, we compared Implant-related artifact (IRA) around metallic and bio-integrative (BI) implants utilized to fix medial displacement calcaneal osteotomies. We found metallic implants to demonstrate significantly and pronouncedly increased HU dispersion in in close proximity with the implants and significantly decreased dispersion more distantly from the implant, shielding the surrounding cancellous bone, and potentially hindering the assessment of bone density quality and bone/osteotomy/fusion healing in its neighborhood. BI implants represent an alternative to decrease these IRA effects. Additional clinical studies are needed to confirm and expand our findings.
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20

Yang, Zhuchuang, Yangkuan Wu, Wei Xu, Huaxin Zhu, Xiangyang Zhang, and Ben-Xin Wang. "Bi-funtional resonance effects of plasmon-induced transparency and Fano-like response using an asymmetry metamaterial resonator consisting of three metallic strips at terahertz frequency." Physica Scripta 96, no. 12 (November 23, 2021): 125526. http://dx.doi.org/10.1088/1402-4896/ac38d6.

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Abstract Bi-functional metamaterial resonance device operated at terahertz frequency is designed in this paper. It is composed of three metallic strips, in which two parallel metallic strips having the identical dimensions are arranged in the longitudinal direction, and a single metallic strip deviated from the center position is arranged in the horizontal direction. Bi-functional resonance effects of plasmon-induced transparency (PIT) and Fano-like response are simultaneously obtained in this simple metamaterial structure. The formation mechanisms of the two resonance effects are analyzed with the aid of the near-field distributions and the dependence of structure parameters on the whole resonance performance. Results further show that the metallic strip placed horizontally plays an important role in adjusting the resonance response of the metamaterial resonator. More importantly, when the deviation value of the metallic strip in the horizontal direction exceeds a certain amount, for example 10 μm, the metamaterial resonator can realize the effective regulation from bi-functional resonance to single-functional PIT effect. Our proposed structure can be used as valuable platform for ideas to inspire the design of novel electro-optic devices.
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21

Zheng, M., H. Gao, H. Teng, J. Hu, Z. Tian, and Y. Zhao. "A Simplified Approach for the Hydro-Forming Process of Bi-Metallic Composite Pipe." Archives of Metallurgy and Materials 62, no. 2 (June 1, 2017): 879–83. http://dx.doi.org/10.1515/amm-2017-0129.

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AbstractIn this article, it aims to propose effective approaches for hydro-forming process of bi-metallic composite pipe by assuming plane strain and elastic-perfectly plastic material model. It derives expressions for predicting hydro-forming pressure and residual stress of the forming process of bi-metallic composite pipe. Test data from available experiments is employed to check the model and formulas. It shows the reliability of the proposed model and formulas impersonally.
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22

Conte, Francesco, Ilenia Rossetti, Gianguido Ramis, Cyril Vaulot, Samar Hajjar-Garreau, and Simona Bennici. "Low Metal Loading (Au, Ag, Pt, Pd) Photo-Catalysts Supported on TiO2 for Renewable Processes." Materials 15, no. 8 (April 15, 2022): 2915. http://dx.doi.org/10.3390/ma15082915.

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Photo-catalysts based on titanium dioxide, and modified with highly dispersed metallic nanoparticles of Au, Ag, Pd and Pt, either mono- or bi-metallic, have been analyzed by multiple characterization techniques, including XRD, XPS, SEM, EDX, UV-Vis and N2 adsorption/desorption. Mono-metallic photo-catalysts were prepared by wet impregnation, while bi-metallic photocatalysts were obtained via deposition-precipitation (DP). The relationship between the physico-chemical properties and the catalyst’s behavior for various photo-synthetic processes, such as carbon dioxide photo-reduction to liquid products and glucose photo-reforming to hydrogen have been investigated. Among the tested materials, the catalysts containing platinum alone (i.e., 0.1 mol% Pt/TiO2) or bi-metallic gold-containing materials (e.g., 1 wt% (AuxAgy)/TiO2 and 1 wt% (AuxPtz)/TiO2) showed the highest activity, presenting the best results in terms of productivity and conversion for both applications. The textural, structural and morphological properties of the different samples being very similar, the main parameters to improve performance were function of the metal as electron sink, together with optoelectronic properties. The high activity in both applications was related to the low band gap, that allows harvesting more energy from a polychromatic light source with respect to the bare TiO2. Overall, high selectivity and productivity were achieved with respect to most literature data.
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23

Liu, Xiufan, Xuyang Xiong, Shuoping Ding, Qingqing Jiang, and Juncheng Hu. "Bi metal-modified Bi4O5I2 hierarchical microspheres with oxygen vacancies for improved photocatalytic performance and mechanism insights." Catalysis Science & Technology 7, no. 16 (2017): 3580–90. http://dx.doi.org/10.1039/c7cy01112a.

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24

Tokuda, Masashi, Natsuki Kabeya, Komei Iwashita, Hiroki Taniguchi, Tomonori Arakawa, Di Yue, Xinxin Gong, Xiaofeng Jin, Kensuke Kobayashi, and Yasuhiro Niimi. "Spin transport measurements in metallic Bi/Ni nanowires." Applied Physics Express 12, no. 5 (April 24, 2019): 053005. http://dx.doi.org/10.7567/1882-0786/ab15ae.

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25

Mishra, Shailja, Diyana Patel, Hiten Patel, Smit Patel, and Mohit Teacher. "Evaluation of Mechanical Properties for Bi-Metallic Welds." International Journal of Mechanical Engineering 4, no. 3 (April 25, 2017): 1–4. http://dx.doi.org/10.14445/23488360/ijme-v4i4p101.

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26

Khan, M. A., and K. Yaldram. "Catalytic reactions on mono- and bi-metallic surfaces." Journal of Physics: Condensed Matter 1, SB (October 1, 1989): SB199—SB200. http://dx.doi.org/10.1088/0953-8984/1/sb/040.

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27

Rumpf, Klemens, Petra Granitzer, Roberto Gonzalez-Rodriguez, Jeffery Coffer, and Michael Reissner. "(Invited) Nanostructured Silicon with Incorporated Bi-Metallic Nanostructures." ECS Transactions 98, no. 2 (September 23, 2020): 37–43. http://dx.doi.org/10.1149/09802.0037ecst.

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28

Xu, Guangchen, Alan A. Luo, Yiqing Chen, and Anil K. Sachdev. "Interfacial phenomena in magnesium/aluminum bi-metallic castings." Materials Science and Engineering: A 595 (February 2014): 154–58. http://dx.doi.org/10.1016/j.msea.2013.11.093.

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29

Wang, Dong, and Peter Schaaf. "Ni–Au bi-metallic nanoparticles formed via dewetting." Materials Letters 70 (March 2012): 30–33. http://dx.doi.org/10.1016/j.matlet.2011.11.102.

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30

King, Philip J. "Organometallic chemistry of bi- and poly-metallic complexes." Annual Reports Section "A" (Inorganic Chemistry) 103 (2007): 333. http://dx.doi.org/10.1039/b612869f.

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31

Rumpf, Klemens, Petra Granitzer, Roberto Gonzalez-Rodriguez, Jeffery Coffer, and Michael Reissner. "(Invited) Nanostructured Silicon with Incorporated Bi-Metallic Nanostructures." ECS Meeting Abstracts MA2020-02, no. 10 (November 23, 2020): 1209. http://dx.doi.org/10.1149/ma2020-02101209mtgabs.

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32

King, Philip J. "Organometallic chemistry of bi- and poly-metallic complexes." Annual Reports Section "A" (Inorganic Chemistry) 104 (2008): 325. http://dx.doi.org/10.1039/b716588a.

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33

Taniker, S., P. Celli, D. Pasini, D. C. Hofmann, and C. Daraio. "Temperature-induced shape morphing of bi-metallic structures." International Journal of Solids and Structures 190 (May 2020): 22–32. http://dx.doi.org/10.1016/j.ijsolstr.2019.10.024.

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34

Li, J. C., W. Liu, and Q. Jiang. "Bi-phase transition diagrams of metallic thin multilayers." Acta Materialia 53, no. 4 (February 2005): 1067–71. http://dx.doi.org/10.1016/j.actamat.2004.11.004.

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35

Jha, Animesh, and P. Grieveson. "Growth of bi-partite and metallic copper whiskers." Journal of Materials Science 25, no. 5 (May 1990): 2299–311. http://dx.doi.org/10.1007/bf00638020.

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36

Ameen, Fuad. "Optimization of the Synthesis of Fungus-Mediated Bi-Metallic Ag-Cu Nanoparticles." Applied Sciences 12, no. 3 (January 27, 2022): 1384. http://dx.doi.org/10.3390/app12031384.

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Bi-metallic nanoparticles (NPs) have appeared to be more efficient as antimicrobials than mono-metallic NPs. The fungus Aspergillus terreus-mediated synthesis of bi-metallic Ag-Cu NPs was optimized using response surface methodology (RSM) to reach the maximum yield of NPs. The optimal conditions were validated using ANOVA. The optimal conditions were 1.5 mM total metal (Ag + Cu) concentration, 1.25 mg fungal biomass, 350 W microwave power, and 15 min reaction time. The structure and shape of the synthesized NPs (mostly 20–30 nm) were characterized using several analytical tools. The biological activities of the synthesized NPs were assessed by studying their antioxidant, antibacterial, and cytotoxic activity in different NP concentrations. A dose-dependent response was observed in each test. Bi-metallic Ag-Cu NPs inhibited three clinically relevant human pathogens: Klebsiella pneumoniae, Enterobacter cloacae, and Pseudomonas aeruginosa. Escherichia coli, Enterococcus faecalis, and Staphylococcus aureus were inhibited less. The DPPH and hydrogen peroxide scavenging activities of the NPs were high, reaching 90% scavenging. Ag-Cu NPs could be studied as antimicrobials in different applications. The optimization procedure using statistical analyses was successful in improving the yield of nanoparticles.
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37

Delattre, Cécilia, Diego Velazquez, Caroline Roques, Graciela Pavon-Djavid, Véronique Ollivier, Anna Lokajczyk, Thierry Avramoglou, et al. "In vitro and in vivo evaluation of a dextran-graft-polybutylmethacrylate copolymer coated on CoCr metallic stent." BioImpacts 9, no. 1 (October 2, 2018): 25–36. http://dx.doi.org/10.15171/bi.2019.04.

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Introduction: The major complications of stent implantation are restenosis and late stent thrombosis. PBMA polymers are used for stent coating because of their mechanical properties. We previously synthesized and characterized Dextrangraft-polybutylmethacrylate copolymer (Dex-PBMA) as a potential stent coating. In this study, we evaluated the haemocompatibility and biocompatibility properties of Dex-PBMA in vitro and in vivo. Methods: Here, we investigated: (1) the effectiveness of polymer coating under physiological conditions and its ability to release Tacrolimus®, (2) the capacity of Dex-PBMA to inhibit Staphylococcus aureus adhesion, (3) the thrombin generation and the human platelet adhesion in static and dynamic conditions, (4) the biocompatibility properties in vitro on human endothelial colony forming cells ( ECFC) and on mesenchymal stem cells (MSC) and in vivo in rat models, and (5) we implanted Dex-PBMA and Dex-PBMATAC coated stents in neointimal hyperplasia restenosis rabbit model. Results: Dex-PBMA coating efficiently prevented bacterial adhesion and release Tacrolimus®. Dex-PBMA exhibit haemocompatibility properties under flow and ECFC and MSC compatibility. In vivo, no pathological foreign body reaction was observed neither after intramuscular nor intravascular aortic implantation. After Dex-PBMA and Dex-PBMATAC coated stents 30 days implantation in a restenosis rabbit model, an endothelial cell coverage was observed and the lumen patency was preserved. Conclusion: Based on our findings, Dex-PBMA exhibited vascular compatibility and can potentially be used as a coating for metallic coronary stents.
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Kagadi, Matin, Girish Tembhare, Vinaay Patil, and Sujay Shelke. "Optimization of Self Activating Bi-Metallic Valve Using Thermo – Structural Coupled FEA." Advanced Materials Research 622-623 (December 2012): 147–51. http://dx.doi.org/10.4028/www.scientific.net/amr.622-623.147.

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Besides relying on electronically actuated valves, there is a need to have a mechanically actuated valve and a warning system as second layer of safety in-case of electronic malfunction. The specific process for which optimization is carried out, is the process of nitrous oxide generation from ammonium nitrate. The key challenge in the process was maintaining temperatures below 200°C, as above this temperature ammonium nitrate becomes explosive and hence safety risks are involved. The secondary objective was to maintain temperatures above 170°C, as below this temperature the reaction does not proceed. In this paper we have tried to fulfill these objectives by employing a bi-metallic valve and a warning system having bi-metallic strip which will bend at higher temperatures, thus serving our primary purpose of self-actuation. However the key constraint in determining the dimensions of the valve and the warning system is a desirable deflection of bi-metallic strip. To optimize these parameters we have employed non-linear FEA and thermo-structural coupled FEA, and this paper reflects on the process employed in achieving the same.
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Dutta, Abhijit, Kiran Kiran, Motiar Rahaman, Ivan Zelocualtecatl Montiel, Pavel Moreno-Garcí, Soma Vesztergom, Jakub Drnec, Mehtap Oezaslan, and Peter Broekmann. "Insights from Operando and Identical Location (IL) Techniques on the Activation of Electrocatalysts for the Conversion of CO2: A Mini-Review." CHIMIA International Journal for Chemistry 75, no. 9 (September 15, 2021): 733–43. http://dx.doi.org/10.2533/chimia.2021.733.

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In this mini-review we compare two prototypical metal foam electrocatalysts applied to the transformation of CO2 into value-added products (e.g. alcohols on Cu foams and formate on Bi foams). A substantial improvement in the catalyst performance is typically achieved through thermal annealing of the as-deposited foam materials, followed by the electro-reduction of the pre-formed oxidic precursors prior or during the actual CO2 electrolysis. Utilizing highly insightful and sensitive complementary operando analytical techniques (XAS, XRD, and Raman spectroscopy) we demonstrate that this catalyst pre-activation process is entirely accomplished in case of the oxidized Cu foams prior to the formation of hydrocarbons and alcohols from the CO2. The actually active catalyst is therefore the metallic Cu derived from the precursor by means of oxide electro-reduction. Conversely, in their oxidic form, the Cu-based foam catalysts are inactive towards the CO2 reduction reaction (denoted ec-CO2 RR). Oxidized Bi foams can be regarded as an excellent counter example to the above-mentioned Cu case as both metallic and the thermally derived oxidic Bi foams are highly active towards ec-CO2 RR (formate production). Indeed, operando Raman spectroscopy reveals that CO2 electrolysis occurs upon its embedment into the oxidic Bi2O3 foam precursor, which itself undergoes partial transformation into an active sub-carbonate phase. The potential-dependent transition of sub-carbonates/oxides into the corresponding metallic Bi foam dictates the characteristic changes of the ec-CO2 RR pathway. Identical location (IL) microscopic inspection of the catalyst materials, e.g. by means of scanning electron microscopy, demonstrates substantial morphological alterations on the nm length scale on the material surface as consequence of the sub-carbonate formation and the potential-driven oxide reduction into the metallic Bi foam. The foam morphology on a mesoscopic length scale (macroporosity) remains, by contrast, fully unaffected by these phase transitions.
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Zhang, Rui, Jun Huang, Guangliang Chen, Wei Chen, Changsheng Song, Chaorong Li, and Kostya Ostrikov. "In situ engineering bi-metallic phospho-nitride bi-functional electrocatalysts for overall water splitting." Applied Catalysis B: Environmental 254 (October 2019): 414–23. http://dx.doi.org/10.1016/j.apcatb.2019.04.089.

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Ranabhat, K., K. S. Skripkin, K. F. Chernyshova, E. A. Sofronova, A. A. Revina, A. I. Pylinina, L. N. Patrikeev, and V. A. Lapshinsky. "Enhanced performance of a dye sensitized solar cell using metallic and bi-metallic nanoparticles." IOP Conference Series: Materials Science and Engineering 498 (April 16, 2019): 012021. http://dx.doi.org/10.1088/1757-899x/498/1/012021.

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42

Esmacher, Olivia, Michael Hurst, G. Regmi, S. Velumani, H. Castaneda, and Mathew Kuttolamadom. "Selective laser sintering of metallic oxide powder mixtures for bi/tri-metallic-oxide formation." Materials Letters 286 (March 2021): 129215. http://dx.doi.org/10.1016/j.matlet.2020.129215.

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43

Ley, Morten B., Elsa Roedern, and Torben R. Jensen. "Eutectic melting of LiBH4–KBH4." Phys. Chem. Chem. Phys. 16, no. 44 (2014): 24194–99. http://dx.doi.org/10.1039/c4cp03207a.

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Ilker, Efe, Melihat Madran, Mine Konuk, and Sondan Durukanoğlu. "Growth and shape stability of Cu–Ni core–shell nanoparticles: an atomistic perspective." Chemical Communications 54, no. 96 (2018): 13583–86. http://dx.doi.org/10.1039/c8cc05966g.

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Bennett, Jennifer L., Haiguang Liao, Tilo Buergel, Gregory Hyatt, Kornel Ehmann, and Jian Cao. "Towards bi-metallic injection molds by directed energy deposition." Manufacturing Letters 27 (January 2021): 78–81. http://dx.doi.org/10.1016/j.mfglet.2021.01.001.

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46

Plouin, Juliette, Elodie Richalot, Odile Picon, Mathieu Carras, and Alfredo de Rossi. "Photonic band structures for bi-dimensional metallic mesa gratings." Optics Express 14, no. 21 (2006): 9982. http://dx.doi.org/10.1364/oe.14.009982.

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47

Guieu, Samuel, Francisco Cardona, João Rocha, and Artur M. S. Silva. "Luminescent bi-metallic fluoroborate derivatives of bulky salen ligands." New J. Chem. 38, no. 11 (2014): 5411–14. http://dx.doi.org/10.1039/c4nj00941j.

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Yu, Zeming, P. Odier, L. Ortega, Lian Zhou, Pingxiang Zhang, Yafeng Lu, Lihua Jin, Chengshan Li, and Xianghong Liu. "Fabrication of Cube-Textured Ni/Cu bi-Metallic Substrate." Rare Metal Materials and Engineering 40, no. 6 (June 2011): 941–45. http://dx.doi.org/10.1016/s1875-5372(11)60037-4.

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49

Buchan, Caroline, Nathalie Hamel, James B. Woell, and Howard Alper. "Mono- and bi-metallic catalysed formate–halide carbonylation reactions." J. Chem. Soc., Chem. Commun., no. 2 (1986): 167–68. http://dx.doi.org/10.1039/c39860000167.

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Serov, Alexey, Michael H. Robson, Mayat Smolnik, and Plamen Atanassov. "Templated bi-metallic non-PGM catalysts for oxygen reduction." Electrochimica Acta 80 (October 2012): 213–18. http://dx.doi.org/10.1016/j.electacta.2012.07.008.

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