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Journal articles on the topic 'Osmium nanoparticles'

Author: Grafiati

Published: 4 June 2021

Last updated: 4 February 2022

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1

Pitto-Barry, Anaïs, Luis M. A. Perdigao, Marc Walker, et al. "Synthesis and controlled growth of osmium nanoparticles by electron irradiation." Dalton Transactions 44, no. 47 (2015): 20308–11. http://dx.doi.org/10.1039/c5dt03205a.

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Defined-size osmium nanoparticles (1.5–50 nm) were synthesized on a B- and S-doped turbostratic graphitic structure from an organometallic osmium complex encapsulated in self-spreading polymer micelles and characterised by (HR)TEM, AFM and XPS.

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2

Dimakis, Nicholas, Nestor E. Navarro, and Eugene S. Smotkin. "Carbon monoxide adsorption on platinum-osmium and platinum-ruthenium-osmium mixed nanoparticles." Journal of Chemical Physics 138, no. 17 (2013): 174704. http://dx.doi.org/10.1063/1.4802817.

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3

Li, Chunxiang, Weng Kee Leong, and Ziyi Zhong. "Metallic osmium and ruthenium nanoparticles for CO oxidation." Journal of Organometallic Chemistry 694, no. 15 (2009): 2315–18. http://dx.doi.org/10.1016/j.jorganchem.2009.03.038.

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4

Santacruz, Lynay, Silvia Donnici, Albert Granados, Alexandr Shafir, and Adelina Vallribera. "Fluoro-tagged osmium and iridium nanoparticles in oxidation reactions." Tetrahedron 74, no. 48 (2018): 6890–95. http://dx.doi.org/10.1016/j.tet.2018.10.040.

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5

Contreras-Carballada, Pablo, Fabio Edafe, Frans D. Tichelaar, Peter Belser, Luisa De Cola, and René M. Williams. "Tripodal Osmium Polypyridyl Complexes for Self-Assembly on Platinum Nanoparticles." Journal of Physical Chemistry Letters 2, no. 12 (2011): 1460–63. http://dx.doi.org/10.1021/jz200558g.

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6

Yang, Tianshe, Ao Xia, Qian Liu, et al. "Polymer nanoparticles with an embedded phosphorescent osmium(ii) complex for cell imaging." Journal of Materials Chemistry 21, no. 14 (2011): 5360. http://dx.doi.org/10.1039/c0jm04235h.

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7

Bello, Valentina, Giovanni Mattei, Paolo Mazzoldi, et al. "Transmission Electron Microscopy of Lipid Vesicles for Drug Delivery: Comparison between Positive and Negative Staining." Microscopy and Microanalysis 16, no. 4 (2010): 456–61. http://dx.doi.org/10.1017/s1431927610093645.

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AbstractLipid-containing nanostructures, in the form of solid lipid nanoparticles or iron oxide nanoparticles (NPs) coated with a lipid shell, were used as case studies for assessing and optimizing staining for transmission electron microscopy structural and compositional characterization. These systems are of paramount importance as drug delivery systems or as bio-compatible contrast agents. In particular, we have treated the systems with a negative (phospshotungstic acid) or with a positive (osmium tetroxide) staining agent. For iron-oxide NPs coated with the lipid shell, negative staining was more efficient with respect to the positive one. Nevertheless, in particular cases the combination of the two staining procedures provided more complete morphological and compositional characterization of the particles.

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8

Binder, Wolfgang H., Harald Weinstabl, and Robert Sachsenhofer. "Superparamagnetic Ironoxide Nanoparticles via Ligand Exchange Reactions: Organic 1,2-Diols as Versatile Building Blocks for Surface Engineering." Journal of Nanomaterials 2008 (2008): 1–10. http://dx.doi.org/10.1155/2008/383020.

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A method for the preparation of ligand-covered superparamagnetic iron oxide nanoparticles via exchange reactions is described. 1,2-diol-ligands are used to provide a stable binding of the terminally modified organic ligands onto the surface ofγ-Fe2O3-nanoparticles (r∼4 nm). The 1,2-diol-ligands are equipped with variable terminal functional groups (i.e., hydrogen bonding moieties, azido- bromo-, fluorescent moieties) and can be easily prepared via osmium tetroxide-catalyzed 1,2-dihydroxylation reactions of the corresponding terminal alkenes. Starting from octylamine-coveredγ-Fe2O3-nanoparticles, ligand exchange was effected at50∘C over 24–48 hours, whereupon complete ligand exchange is taking place as proven by thermogravimetric (TGA)- and IR-spectroscopic measurements. A detailed kinetic analysis of the ligand exchange reaction was performed via TGA analysis, demonstrating a complete ligand exchange after 24 hours. The method offers a simple approach for the generation of variousγ-Fe2O3-nanoparticles with functional organic shells in a one-step procedure.

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9

He, Shao-Bin, Quan-Quan Zhuang, Liu Yang, et al. "A Heparinase Sensor Based on a Ternary System of Hg2+–Heparin–Osmium Nanoparticles." Analytical Chemistry 92, no. 1 (2019): 1635–42. http://dx.doi.org/10.1021/acs.analchem.9b05222.

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10

Barry, Nicolas P. E., Anaïs Pitto-Barry, Isolda Romero-Canelón, et al. "Precious metal carborane polymer nanoparticles: characterisation of micellar formulations and anticancer activity." Faraday Discuss. 175 (2014): 229–40. http://dx.doi.org/10.1039/c4fd00098f.

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We report the encapsulation of highly hydrophobic 16-electron organometallic ruthenium and osmium carborane complexes [Ru/Os(p-cymene)(1,2-dicarba-closo-dodecarborane-1,2-dithiolate)] (1and2) in Pluronic® triblock copolymer P123 core–shell micelles. The spherical nanoparticlesRuMsandOsMs, dispersed in water, were characterized by dynamic light scattering (DLS), cryogenic transmission electron microscopy (cryo-TEM), and synchrotron small-angle X-ray scattering (SAXS; diameterca.15 and 19 nm, respectively). Complexes1and2were highly active towards A2780 human ovarian cancer cells (IC<sub>50</sub>0.17 and 2.50 μM, respectively) and the encapsulated complexes, asRuMsandOsMsnanoparticles, were less potent (IC<sub>50</sub>6.69 μM and 117.5 μM, respectively), but more selective towards cancer cells compared to normal cells.

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11

Heidari, Alireza. "Pros and Cons Controversy on Synchrotronic Biosensor Using Os–Pd/HfC Nanocomposite for Tracking, Monitoring, Imaging, Measuring, Diagnosing and Detecting Cancer Cells, Tissues and Tumors." Indonesian Journal of Cancer Chemoprevention 12, no. 1 (2021): 1. http://dx.doi.org/10.14499/indonesianjcanchemoprev12iss1pp1-10.

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In the current paper, optimization of Tri Propyl Amine (TPrA) concentrations and Os–Pd/HfC nanocomposite as two main and effective materials in the intensity of synchrotron for tracking, monitoring, imaging, measuring, diagnosing and detecting cancer cells are considered so that the highest sensitivity obtains. In this regard, various concentrations of two materials were prepared and photon emission was investigated in the absence of cancer cells.Keywords: Synchrotronic Biosensor, Os–Pd/HfC Nanocomposite, Photomultiplier, Hafnium(IV) Carbide (HfC) Nanoparticles, Tracking, Monitoring, Imaging, Measuring, Diagnosing, Detecting, Cancer Cells, Osmium bis(2,2'–bipyridine)chloride.

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12

Cele, Takalani, Philip Beukes, Thomas Beuvier, Elvia Chavez, Malik Maaza, and Alain Gibaud. "Radiolytic Conversion of Platinum, Rhodium, Osmium and Palladium Salts into Metal Coatings and Metal Nanoparticles." Johnson Matthey Technology Review 61, no. 4 (2017): 279–89. http://dx.doi.org/10.1595/205651317x696207.

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13

Egeberg, Alexander, Christine Dietrich, Christian Kind, et al. "Bimetallic Nickel-Iridium and Nickel-Osmium Alloy Nanoparticles and Their Catalytic Performance in Hydrogenation Reactions." ChemCatChem 9, no. 18 (2017): 3534–43. http://dx.doi.org/10.1002/cctc.201700168.

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14

Kavitha, C., K. Bramhaiah, Neena S. John, and Shantanu Aggarwal. "Improved surface-enhanced Raman and catalytic activities of reduced graphene oxide–osmium hybrid nano thin films." Royal Society Open Science 4, no. 9 (2017): 170353. http://dx.doi.org/10.1098/rsos.170353.

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Reduced graphene oxide–osmium (rGO-Os) hybrid nano dendtrites have been prepared by simple liquid/liquid interface method for the first time. The method involves the introduction of phase-transfered metal organic precursor in toluene phase and GO dispersion in the aqueous phase along with hydrazine hydrate as the reducing agent. Dendritic networks of Os nanoparticles and their aggregates decorating rGO layers are obtained. The substrate shows improved catalytic and surface-enhanced activities comparable with previous reports. The catalytic activity was tested for the reduction of p -nitroaniline into p -phenyldiamine with an excess amount of NaBH 4 . The catalytic activity factors of these hybrid films are 2.3 s −1 g −1 (Os film) and 4.4 s −1 g −1 (rGO-Os hybrid film), which are comparable with other noble metal nanoparticles such as Au, Ag, but lower than Pd-based catalysts. Surface-enhanced Raman spectroscopy (SERS) measurements have been done on rhodamine 6G (R6G) and methylene blue dyes. The enhancement factor for the R6G adsorbed on rGO-Os thin film is 1.0 × 10 5 and for Os thin film is 7 × 10 3 . There is a 14-fold enhancement observed for Os hybrids with rGO. The enhanced catalytic and SERS activities of rGO-Os hybrid thin film prepared by simple liquid/liquid interface method open up new challenges in electrocatalytic application and SERS-based detection of biomolecules.

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15

Escaño, Mary Clare Sison, Ryan Lacdao Arevalo, Előd Gyenge, and Hideaki Kasai. "First-principles study of borohydride adsorption properties on osmium nanoparticles and surfaces: understanding the effects of facets, size and local sites." Catal. Sci. Technol. 4, no. 5 (2014): 1301–12. http://dx.doi.org/10.1039/c3cy01048a.

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16

Zhu, Jie, Xiao-Tao Sun, Xiao-Dong Wang, and Lei Wu. "Enantioselective Dihydroxylation of Alkenes Catalyzed by 1,4-Bis(9-O -dihydroquinidinyl)phthalazine-Modified Binaphthyl-Osmium Nanoparticles." ChemCatChem 10, no. 8 (2017): 1788–92. http://dx.doi.org/10.1002/cctc.201701368.

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17

Lee, Jinhwan, Hyosul Shin, Chan Kang, and Sunghyun Kim. "Solar Energy Conversion through Thylakoid Membranes Wired by Osmium Redox Polymer and Indium Tin Oxide Nanoparticles." ChemSusChem 14, no. 10 (2021): 2216–25. http://dx.doi.org/10.1002/cssc.202100288.

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18

Li, Chunxiang, Wai Yip Fan, and Weng Kee Leong. "Osmium Carbonyl Clusters on Gold and Silver Nanoparticles as Models for Studying the Interaction with the Metallic Surface." Journal of Physical Chemistry C 113, no. 43 (2009): 18562–69. http://dx.doi.org/10.1021/jp9066185.

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19

Krämer, Jérôme, Engelbert Redel, Ralf Thomann, and Christoph Janiak. "Use of Ionic Liquids for the Synthesis of Iron, Ruthenium, and Osmium Nanoparticles from Their Metal Carbonyl Precursors." Organometallics 27, no. 9 (2008): 1976–78. http://dx.doi.org/10.1021/om800056z.

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20

Choi, Young-Bong, and Hyug-Han Kim. "Electrochemical Method for Detecting Hippuric Acid Using Osmium-antigen Conjugate on the Gold Nanoparticles Modified Screen-printed Carbon Electrodes." Journal of Electrochemical Science and Technology 2, no. 1 (2011): 57–61. http://dx.doi.org/10.5229/jecst.2011.2.1.057.

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21

Choi, Young-Bong, and Hyug-Han Kim. "Electrochemical Method for Detecting Hippuric Acid Using Osmium-antigen Conjugate on the Gold Nanoparticles Modified Screen-printed Carbon Electrodes." Journal of Electrochemical Science and Technology 2, no. 1 (2011): 57–61. http://dx.doi.org/10.33961/jecst.2011.2.1.057.

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22

Reetz, Manfred T., Marco Lopez, Wolfgang Grünert, Walter Vogel, and Falko Mahlendorf. "Preparation of Colloidal Nanoparticles of Mixed Metal Oxides Containing Platinum, Ruthenium, Osmium, and Iridium and Their Use as Electrocatalysts†." Journal of Physical Chemistry B 107, no. 30 (2003): 7414–19. http://dx.doi.org/10.1021/jp027785a.

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23

Low, Jia En, Annette Foelske-Schmitz, Frank Krumeich, et al. "Narrowly dispersed silica supported osmium nanoparticles prepared by an organometallic approach: H2 and CO adsorption stoichiometry and hydrogenolysis catalytic activity." Dalton Transactions 42, no. 35 (2013): 12620. http://dx.doi.org/10.1039/c3dt50980j.

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24

Favereau, Ludovic, Abhinandan Makhal, David Provost, et al. "Tris-bipyridine based dinuclear ruthenium(ii)–osmium(iii) complex dyads grafted onto TiO2 nanoparticles for mimicking the artificial photosynthetic Z-scheme." Physical Chemistry Chemical Physics 19, no. 6 (2017): 4778–86. http://dx.doi.org/10.1039/c6cp06679h.

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25

Sharifi, Ensiyeh, Abdollah Salimi, and Esmaeil Shams. "DNA/nickel oxide nanoparticles/osmium(III)-complex modified electrode toward selective oxidation of l-cysteine and simultaneous detection of l-cysteine and homocysteine." Bioelectrochemistry 86 (August 2012): 9–21. http://dx.doi.org/10.1016/j.bioelechem.2011.12.013.

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26

Diniz, M. S., A. P. Alves de Matos, J. Lourenço, et al. "TiO2 nanoparticles intake by fish gill cells following exposure." Microscopy and Microanalysis 19, S4 (2013): 71–72. http://dx.doi.org/10.1017/s1431927613000974.

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Engineered nanomaterials such as nanoparticles (NPs) are increasingly being used for commercial purposes in products within medicine, electronics, sporting goods, tires, textiles and cosmetics. They comprise diverse types of materials from metals, polymers, ceramic to biomaterials and have been defined as particles with at least one dimension in the order up to 100 nm1. The higher toxicological potential of NPs is mostly due to their small size, wide surface, increase of their chemical reactivity and biological activity and the capacity to generate free radicals. NPs also can have the ability to penetrate trough the biological barriers and to move easily through the biological systems. Therefore, is mandatory to assess the toxicity of these nanomaterials, since their industrial production and uses will also result in releases to the environment with unclear consequences.The aim of the present work is to evaluate the toxicity of titanium dioxide (TiO2) NPs on gill gluthatione-S-transferase activity (GST), lipid peroxidation and on structure of the gills of two freshwater fish species (Carassius auratus and Danio rerio). Suspensions of TiO2 NPs, with an average size of 21 nm, were prepared using distillate water and then ultrasonicated (10 min, 35 KHz). The suspensions were added to 10L of tap water in exposure tanks, to obtain nominal concentrations (0.01; 0.1; 1, 10; 100 TiO2 mg/L). The test fish, C. auratus (N=144) and D. rerio (N=80), were randomly distributed by 6 exposure tanks and an additional tank with clean tap water was used as control. Fish were sampled after 7, 14, and 21 days. Six fish from both species were left for depuration in clean tap water during 14 days and then sacrificed. The GST activity was determined by following the procedure described by Habig et al. and lipid peroxidation was measured based on the Thiobarbituric Acid Reactive Species method. The tissues were processed essentially according to Martoja and Martoja for light microscopy (LM). For transmission electron microscopy (TEM) the samples were fixed sequentially in glutaraldehyde, osmium tetroxide and uranyl acetate, dehydrated in ethanol and embedded in Epon-Araldite according to standard procedures. The histological and ultrastructural observations were performed using a Leica-ATC 2000 microscope and a JEOL 100-SX electron microscope respectively.The results show a significant increase of GST in gills tissues for C.auratus exposed to 10 and 100 mg/L TiO2 NPs and a decrease following the depuration period. With respect to D. rerio a significant increase was observed in fish exposed to 1, 10 and 100 mg/L TiO2 NPs. Lipid peroxidation are in agreement with GST results but showing a significant increase for fish (C.auratus and D. rerio) exposed to concentrations of 0.1 TiO2 mg/L NPs and higher. Usually, the oxidative stress caused by exposure to TiO2 NPs is attributed to hydroxyl radicals (OH) generated by photochemical (UV/vis) processes but it may be also related to specific properties of TiO2 NPs such as size, surface area and solubility that can influence the degree of toxicity. The results from LM observations (Fig. 1) showed that exposure to TiO2 NPs affected gill tissues, with changes being detected in both fish species exposed to 0.1 TiO2 mg/L NPs and higher which is in accordance with biochemical results. Changes include different degrees of hyperplasia (from low to complete fusion of lamellae). The TEM analysis revealed that TiO2 NPs were internalized by gills epithelial cells accumulating in vacuoles inside these cells (Fig. 2). After the depuration period it was observed that the capability for gills to recover was not complete. The results show a strong response to oxidative stress caused by exposure to TiO2 NPs, possibly because they are in direct contact with the exposure medium and function as a first barrier against external aggression. However, the gills changes observed following exposure and a partial recover after depuration suggest that TiO2 NPs may cause deleterious effects in fish gills compromising fish homeostasis.The authors acknowledge the funding by Fundação para a Ciência e Tecnologia through grant PTDC/CTM/099446/2008 and through project no. PEst-C/EQB/LA0006/2011 granted to Requimte.

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27

Diniz, M. S., A. P. Alves de Matos, J. Lourenço, et al. "Histological and biochemical effects of exposure to TiO2 nanoparticles in livers of two freshwater fish species: Carassius auratus and Danio rerio." Microscopy and Microanalysis 19, S4 (2013): 51–52. http://dx.doi.org/10.1017/s1431927613000871.

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Nanoparticles (NPs), particles with at least one dimension less than 100 nm, are used in many industrial applications and to produce new types of materials with unique physicochemical properties. The aquatic environment is commonly the ultimate recipient for NPs and there is uncertainty of exposure as understanding and data regarding the potential detrimental effects of NPs on aquatic biota are missing. In this study, titanium dioxide (TiO2) was chosen for its potential use in technology and diverse industrial applications. The objective of this work is to evaluate the toxicity of TiO2 NPs on total liver glutathione-S-transferase (GST), lipid peroxidation and tissue structure of the livers of two freshwater fish species (Carassius auratus and Danio rerio).Stock suspensions of TiO2 NPs, with an average size of 21 nm, were prepared using distilled water and then ultrasonicated (10 min, 35 KHz). The suspensions were added to 10L of tap water in exposure tanks, to obtain nominal concentrations (0.01; 0.1; 1, 10; 100 TiO2 mg/L). The test fish, C. auratus (N=144) and D. rerio (N=80), were randomly distributed by 6 exposure tanks and an additional tank with clean tap water was used as control. Fish were sampled after 7, 14, and 21 days. Six fish from both species were left for depuration in clean tap water during 14 days and then sacrificed. Immediately after sampling the fish were processed for enzymatic determination and histopathology. The GST activity was determined by following the procedure described by Habig et al. and lipid peroxidation was measured based on the Thiobarbituric Acid Reactive Species method. The tissues were processed essentially according to Martoja and Martoja for light microscopy (LM). For transmission electron microscopy (TEM) the samples were fixed sequentially in glutaraldehyde, osmium tetroxide and uranyl acetate, dehydrated in ethanol and embedded in Epon-Araldite according to standard procedures. The histological and ultra-structural observations were carried out using a Leica microscope (Leica-ATC 2000) and a JEOL 100-SX electron microscope respectively.The results showed increased activities of the GST in livers with increasing TiO2 NP concentrations after 7 days of exposure, however after 14 days a trend to decrease was observed for both species. The GST results suggest that the increase of activity of these detoxification enzymes can be a response to oxidative stress caused by the generation of reactive oxygen species by the NP. On the other hand, size, chemical composition, surface area, shape, solubility and aggregation may also contribute for NPs toxicity. The results from lipid peroxidation showed an increase according to tested concentrations suggesting that TiO2 NPs is able to cause cell damage and is in agreement with biochemical and histological findings. After 14 days of depuration, GST and lipid peroxidation levels were not significant different from controls suggesting that cells are able to recover in a certain degree. The results from LM (Fig. 1) showed that exposure to TiO2 NPs affected liver structure, with more pronounced changes detected in livers from fish exposed to higher concentrations. Observed changes include tissue degeneration, inflammation and pyknosis among others. The TEM analysis revealed also severe changes in liver cells compatible with oxidative stress. Hepatocytes of treated fish showed glycogen depletion, swollen mitochondria and increased lysosomes, compared to controls. After depuration, some cells recovered nearly normal morphology, but retained the lysosomes, while others underwent necrotic changes (Fig. 2). Differences among the two species studied were of a quantitative nature, and more pronounced in Danio rerio.The results suggest that potential risk to fish health exist related to the TiO2 NPs release to the aquatic environment and may cause deleterious effects in aquatic organisms. It is evident that the effects of TiO2 NPs on environment is a matter of great concern and the precise mechanisms of toxicity of this and other types of NPs must be clarified.The authors acknowledge the funding by Fundação para a Ciência e Tecnologia through grant PTDC/CTM/099446/2008 and through project no. PEst-C/EQB/LA0006/2011 granted to Requimte.

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28

Lam, Vincent W. S., and Elöd L. Gyenge. "High-Performance Osmium Nanoparticle Electrocatalyst for Direct Borohydride PEM Fuel Cell Anodes." Journal of The Electrochemical Society 155, no. 11 (2008): B1155. http://dx.doi.org/10.1149/1.2975191.

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29

Wang, Fang, Yuejiao Wang, Yanhui Li, Qiong Wang, Xinyu Qi, and Lei Zhang. "New Approach for Highly Selective Separation and Recovery of Osmium and Rhodium by Using a Nanoparticle Microcolumn." Industrial & Engineering Chemistry Research 53, no. 39 (2014): 15200–15206. http://dx.doi.org/10.1021/ie502501g.

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30

Heidari, Alireza, Katrina Schmitt, Maria Henderson, and Elizabeth Besana. "Drug delivery systems (DDSs) of osmium nanoparticles on human gum cancer cells, tissues and tumors treatment under synchrotron radiation." Dental, Oral and Maxillofacial Research 5, no. 6 (2019). http://dx.doi.org/10.15761/domr.1000325.

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31

Kumar, Swati A., Russell J. Needham, Kristin Abraham, et al. "Dose and time-dependent tolerability and efficacy of organo-osmium complex FY26 and its tissue pharmacokinetics in hepatocarcinoma-bearing mice." Metallomics, December 11, 2020. http://dx.doi.org/10.1093/mtomcs/mfaa003.

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Abstract The organo-osmium complex [OsII(ɳ6-p-cym)(PhAzPy-NMe2)I]+ (FY26) exhibits promising in vitro antitumour activity against mouse hepatocarcinoma Hepa1-6 and other mouse or human cancer cell lines. Here, we drastically enhance water solubility of FY26 through the replacement of the PF6−counter-anion with chloride using a novel synthesis method. FY26.PF6 and FY26.Cl displayed similar in vitro cytoxicity in two cancer cell models. We then show the moderate and late anticancer efficacy of FY26.PF6 and FY26.Cl in a subcutaneous murine hepatocarcinoma mouse model. Both efficacy and tolerability varied according to FY26 circadian dosing time in hepatocarcinoma tumour-bearing mice. Tumour and liver uptake of the drug were determined over 48 h following FY26.Cl administration at Zeitgeber 6 (ZT6), when the drug is least toxic (in the middle of the light span when mice are resting). Our studies suggest the need to administer protracted low doses of FY26 at ZT6 in order to optimize its delivery schedule, for example through the use of chrono-releasing nanoparticles.

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32

"Magnetic Nanoparticle Supported Osmium for Olefin Dihydroxylation." Synfacts 2011, no. 08 (2011): 0916. http://dx.doi.org/10.1055/s-0030-1260708.

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