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22 Result(s)

within G. Rosas Remove this filter Characterization and Evaluation of Materials Remove this filter

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  1. No Access

    Article

    AgNPs/GO nanomaterial by a simple method and studied its antibacterial properties

    This study used the Tamarix gallica aqueous extract to simultaneously reduce silver ions and graphene oxide (GO), forming the AgNPs/GO nanocomposite in a single step. The agar diffusion method determines the mate...

    Anabel Herrera-Rodríguez, R. Esparza, Juan Carlos González-Hernández… in Applied Physics A (2023)

  2. No Access

    Article

    Copper nanoparticles supported on biocarbon film from Sargassum spp. and its electrochemical activity in reducing CO2

    The biocarbon (SKPH) was obtained from Sargassum spp., and it was evaluated electrochemically as support for the CO2 reduction. The biocarbon was synthesized and activated with KOH, obtaining a high surface area ...

    D. A. Pantoja Velueta, S. J. Figueroa Ramírez, J. M. Sierra, B. Escobar… in Carbon Letters (2022)

  3. No Access

    Article

    Silver nanodendrites as excellent catalytic activity properties in dye degradation

    This work reports the silver nanodendrites synthesis by a facile method using the Hamelia patens plant extract as a reducing agent. Furthermore, Ag nanostructures are evaluated for their catalytic properties by d...

    K. Chávez, S. E. Borjas-García, G. Rosas in Applied Physics A (2022)

  4. No Access

    Article

    Carbon nanotubes decorated with silver nanoparticles by a facile method, and their electrochemical and catalytic evaluation

    In this work, MWCNTs were dispersed using the Hamelia patens plant extract and then decorated with AgNPs synthesized with the same aqueous extract as a reducing agent. The UV–Vis technique evaluates the products ...

    I. Santos-Ramos, K. Chávez, S. J. Figueroa, J. Zárate-Medina, G. Rosas in Applied Physics A (2021)

  5. No Access

    Article

    One-step growth of silver nanodendrites and their electrochemical activity

    In this work, Ag dendrites were obtained using a one-step green method by Hamelia patens aqueous extract. Cyclic voltammetry measurements evaluated the electrochemical characterization of Ag nanostructures. Scann...

    K. Chávez, S. J. Figueroa-Ramírez, C. Patiño-Carachure, G. Rosas in Applied Physics A (2021)

  6. No Access

    Chapter

    Biosynthesis of Silver Nanoparticles Using Extracts of Mexican Medicinal Plants

    The biosynthesis of silver nanoparticles using an aqueous extract of Agastache mexicana and Tecoma stans was carried out. The AgNO3 concentration and extract concentration was varied to evaluate their influence o...

    J. L. López, C. Baltazar, M. Torres, A. Ruız… in Characterization of Metals and Alloys (2017)

  7. No Access

    Article

    Bimetallic Alloy of Fe2O3-Ag Nanoparticles: Characterization and Structural Modeling

    The synthesis of Fe3O4-Ag bimetallic nanoparticles by chemical reduction was carried out. Fe nanoparticles were obtained using Fe (III) Chloride hexahydrate (FeCl3•6H2O) as precursor and sodium borohydride (NaBH4

    A. Ruíz-Baltazar, R. Esparza, J. L. López-Miranda… in MRS Online Proceedings Library (2016)

  8. No Access

    Article

    Synthesis of AlFe Intermetallic Nanoparticles by High-Energy Ball Milling

    In this investigation, the chemical and microstructural characteristics of nanostructured AlFe intermetallic produced by high-energy ball milling have been explored. High purity elemental powders were used as ...

    G. Rosas, J. Chihuaque, E. Bedolla, R. Esparza, R. Pérez in MRS Online Proceedings Library (2015)

  9. No Access

    Chapter

    Structural Characterization of Fe2Al5 Intermetallic Compound After Reaction with Water to Release Hydrogen

    Intermetallic compounds with high aluminum content are materials from which hydrogen is released due to their susceptibility to hydrogen environment embrittlement. Therefore, the present work take advantage of...

    J. Luis López-Miranda, R. Esparza, G. Rosas in Materials Characterization (2015)

  10. No Access

    Article

    Structural Characterization of Iron Nanoparticles Synthesized by Chemical -Methods

    Different synthesis methods has been employed to produce nanoparticles, however, chemical reduction method offer a effective route to obtained sizes nanoparticles controlled and morphologies very well defined....

    A. Ruíz-Baltazar, Claudia López, R. Pérez, G. Rosas in MRS Online Proceedings Library (2011)

  11. No Access

    Article

    AlN Nanorods synthesized by a Mechanothermal Process

    Well-crystallized AlN nanorods have been produced by mechanical milling and subsequent annealing treatment of the milling powders (mechanothermal process). High purity AlN powders were used as the starting mat...

    G. Rosas, J. Chihuaque, C. Patiño-Carachure, R. Esparza… in MRS Online Proceedings Library (2011)

  12. No Access

    Article

    The Effect of Temperature and Time on the Formation of a Reaction Interlayer During Aluminizing of a Carbon Steel

    A kinetic study was performed on the growth of a reaction interlayer between molten Al and carbon steel substrates at temperatures between 665 to 820°C by holding Al/flux/steel assemblies, in a tube furnace, a...

    R. Esparza, A. Aguilar, Α. Escobedo-Morales… in MRS Online Proceedings Library (2010)

  13. No Access

    Article

    Electron Microscopy Characterization of Humidity Ball-Milling AlCuFe Intermetallic Powders

    An Al58Cu25Fe17 alloy composition was produced by conventional casting technique. In order to take advantage from the hydrogen-environmental embrittlement reaction, which affects these alloys, this research was c...

    C. Patiño-Carachure, O. Téllez-Vazquez… in MRS Online Proceedings Library (2010)

  14. No Access

    Article

    Cathodic Protection Effect on the Assessment of SCC Susceptibility of X52 Pipeline Steel

    Assessment of anodic and cathodic potentials on stress corrosion cracking (SCC) of API X52 pipeline steel through slow strain rate tests (SSRT) was studied. The SSRT were carried out in a NS4 solution to simul...

    J. O. Téllez-Vázquez, C. Patiño-Carachure… in MRS Online Proceedings Library (2010)

  15. No Access

    Article

    Correlation of Silver Size Nanoparticles Between TEM and QELS

    In this work, silver nanoparticles were synthesized by two methods: polyol and chemical reduction using sodium borohydride (NaBH4). In both cases, silver nitrate was employed as starting metallic salt and Poly-vi...

    A. Ruíz-Baltazar, A. Escobedo, U. Pal, R. Pérez, G. Rosas in MRS Online Proceedings Library (2010)

  16. No Access

    Article

    Room Temperature Mechanical Properties of Fe3Al Intermetallic Alloys with Li and Ni Additions

    This work analyzes the effect of very small additions of Li and Ni on the mechanical properties of the Fe72Al28 intermetallic alloy, close to the Fe3Al ratio. Hardness and tensile strength at room temperature wer...

    G. Rosas, R. Esparza, A. Bedolla-Jacuinde… in Journal of Materials Engineering and Perfo… (2009)

  17. No Access

    Article

    Effect of Ni on the corrosion behavior of Fe–Al intermetallics in simulated human body fluid

    The corrosion behavior of FeAl-type intermetallic alloy in the Hank’s solution has been investigated after additions of 1, 3, and 5 at.% Ni with or without thermal annealing at 400 °C for 144 h. Techniques inc...

    J. G. Gonzalez-Rodriguez, M. Gonzalez-Castañeda… in Journal of Solid State Electrochemistry (2008)

  18. No Access

    Article

    Multiple-walled BN nanotubes obtained with a mechanical alloying technique

    An experimental method to obtain multiple-walled nanotubes of BN using low energy is presented. The method is based on the use of mechanical alloying techniques with elemental boron powders and nitrogen gas mi...

    G. Rosas, J. Sistos, J.A. Ascencio, A. Medina, R. Perez in Applied Physics A (2005)

  19. No Access

    Article

    Evidence of the surface layer in tungstated zirconia

    We characterized the structure of tungstated zirconia (WOx–ZrO2) by combining X-ray diffraction, Raman spectroscopy and High Resolution Electron Microscopy (HREM) together with molecular simulations. Our results ...

    E. Torres-García, G. Rosas, J.A. Ascencio, E. Haro-Poniatowski… in Applied Physics A (2004)

  20. No Access

    Chapter

    On the Nature of the Crystalline Phases Which Coexist with the Fe3Al Intermetallic Compound

    The typical casting methods to produce the Fe3Al intermetallic compounds gives rise to the coexistance of this intermetallic phase with different crystalline structures. One of the easily formed crystalline phase...

    M. Salazar, C. Angeles, R. Pérez, G. Rosas in Emerging Fields in Sol-Gel Science and Tec… (2003)

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