Now showing items 1-20 of 22

    • An antibacterial coating based on a polymer/sol-gel hybrid matrix loaded with silver nanoparticles 

      Rivero Fuente, Pedro J. Upna; Urrutia Azcona, Aitor Upna; Goicoechea Fernández, Javier Upna; Ruiz Zamarreño, Carlos Upna; Arregui San Martín, Francisco Javier Upna; Matías Maestro, Ignacio Upna (Springer, 2011)   Artículo / Artikulua  OpenAccess
      In this work a novel antibacterial surface composed of an organic-inorganic hybrid matrix of tetraorthosilicate and a polyelectrolyte is presented. A precursor solution of tetraethoxysilane (TEOS) and poly(acrylic acid ...
    • Characterization of two iron bullets from the royal ammunition factory of Eugi (Spain) 

      Zalakain Iriazabal, Iñaki Upna; Berlanga Labari, Carlos Upna; Álvarez Vega, Lucas; Rivero Fuente, Pedro Upna; Valencia Monreal, Javier; Rodríguez Trías, Rafael Upna (Technical Faculty, University of Belgrade, 2018)   Artículo / Artikulua  OpenAccess
      In this work, a comparative analysis of two iron bullets found in The Royal Ammunition Factory of Eugi in Navarra (Spain) was performed. Both bullets presented a spherical shape with a relatively good state of preservation, ...
    • A comparative study in the sensitivity of optical fiber refractometers based on the incorporation of gold nanoparticles into layer-by-layer films 

      Rivero Fuente, Pedro Upna; Hernáez Sáenz de Zaitigui, Miguel Upna; Goicoechea Fernández, Javier Upna; Matías Maestro, Ignacio Upna; Arregui San Martín, Francisco Javier Upna (Exeley, 2015)   Artículo / Artikulua  OpenAccess
      In this work, optical fiber refractometers based on the successive incorporation of gold nanoparticles have been fabricated by means of the Layer-by-Layer Embedding (LbL-E) deposition technique. This enables the apparition ...
    • A comparative study in the tribological behavior of DLC coatings deposited by HiPIMS technology with positive pulses 

      García Lorente, José Antonio; Rivero Fuente, Pedro Upna; Barba Areso, Eneko; Fernández, Iván; Santiago, Jose A.; Palacio, José; Fuente, Gonzalo G.; Rodríguez Trías, Rafael Upna (MDPI, 2020)   Artículo / Artikulua  OpenAccess
      During the last few decades, diamond-like carbon (DLC) coatings were widely used for tribological applications, being an effective tool for improving the performance and the useful life of different machining tools. Despite ...
    • A comparative study of multifunctional coatings based on electrospun fibers with incorporated ZnO nanoparticles 

      Rivero Fuente, Pedro J. Upna; Iribarren Zabalegui, Álvaro; Larumbe Abuin, Silvia Upna; Palacio, José; Rodríguez Trías, Rafael Upna (MDPI, 2019)   Artículo / Artikulua  OpenAccess
      In this work, polymeric fibers of polystyrene (PS) with incorporated ZnO nanoparticles have been deposited onto an aluminum alloy substrate (6061T6) by using the electrospinning technique. In order to optimize the deposition ...
    • A comparative study of two different approaches for the incorporation of silver nanoparticles into layer-by-layer films 

      Rivero Fuente, Pedro J. Upna; Goicoechea Fernández, Javier Upna; Matías Maestro, Ignacio Upna; Arregui San Martín, Francisco Javier Upna (Springer, 2014)   Artículo / Artikulua  OpenAccess
      In this work, a comparative study about the incorporation of silver nanoparticles (AgNPs) into thin films is presented using two alternative methods, the in situ synthesis process and the layer-by-layer embedding deposition ...
    • Contribution to the development of functional nanostructured coatings based on silver nanoparticles 

      Rivero Fuente, Pedro J. Upna (2014)   Tesis doctoral / Doktoretza tesia  OpenAccess
      Esta tesis se centra en la síntesis de nanopartículas de plata (AgNPs) y su posterior incorporación en recubrimientos delgados usando dos métodos alternativos: el proceso de síntesis in situ (ISS) de AgNPs y la técnica de ...
    • Designing multifunctional protective PVC electrospun fibers with tunable properties 

      Rivero Fuente, Pedro Upna; Rosagaray Burdaspar, Iker; Fuertes Bonel, Juan Pablo Upna; Palacio, José; Rodríguez Trías, Rafael Upna (MDPI, 2020)   Artículo / Artikulua  OpenAccess
      In this work, the electrospinning technique is used for the fabrication of electrospun functional fibers with desired properties in order to show a superhydrophobic behavior. With the aim to obtain a coating with the best ...
    • Effect of both protective and reducing agents in the synthesis of multicolor silver nanoparticles 

      Rivero Fuente, Pedro J. Upna; Goicoechea Fernández, Javier Upna; Urrutia Azcona, Aitor Upna; Arregui San Martín, Francisco Javier Upna (Springer, 2013)   Artículo / Artikulua  OpenAccess
      In this paper, the influence of variable molar ratios between reducing and loading agents (1:100, 1:50, 1:20, 1:10, 1:5, 1:2, 1:1, 2:1) and between protective and loading agents (0.3:1, 0.75:1, 1.5:1, 3:1, 7.5:1, 30:1, ...
    • Effect of the temperature in the mechanical properties of austenite, ferrite and sigma phases of duplex stainless steels using hardness, microhardness and nanoindentation techniques 

      Argandoña Salinas, Gorka; Palacio, José; Berlanga Labari, Carlos Upna; Biezma Moraleda, María Victoria; Rivero Fuente, Pedro J. Upna; Peña, Julio; Rodríguez Trías, Rafael Upna (MDPI, 2017)   Artículo / Artikulua  OpenAccess
      The aim of this work is to study the hardness of the ferrite, austenite and sigma phases of a UNS S32760 superduplex stainless steel submitted to different thermal treatments, thus leading to different percentages of the ...
    • Electrospinning: a powerful tool to improve the corrosion resistance of metallic surfaces using nanofibrous coatings 

      Rivero Fuente, Pedro Upna; Maeztu Redin, Juan Deyo; Rodríguez Trías, Rafael Upna (MDPI, 2020)   Artículo / Artikulua  OpenAccess
      The use of surface engineering techniques to tune-up the composition of nanostructured thin-films for developing functional coatings with advanced properties is a hot topic within the scientific community. The control of ...
    • Evaluation of functionalized coatings for the prevention of ice accretion by using icing wind tunnel tests 

      Rivero Fuente, Pedro Upna; Rodríguez Trías, Rafael Upna; Larumbe Abuin, Silvia Upna; Monteserín, María; Martín, Francisco (MDPI, 2020)   Artículo / Artikulua  OpenAccess
      Ice accretion presents serious safety issues, as airplanes are exposed to supercooled water droplets both on the ground and while flying through clouds in the troposphere. Prevention of icing is a main concern for both ...
    • Fiber-optic lossy mode resonance sensors 

      Arregui San Martín, Francisco Javier Upna; Del Villar, Ignacio Upna; Corres Sanz, Jesús María Upna; Goicoechea Fernández, Javier Upna; Ruiz Zamarreño, Carlos Upna; Elosúa Aguado, César Upna; Hernáez Sáenz de Zaitigui, Miguel Upna; Rivero Fuente, Pedro J. Upna; Socorro Leránoz, Abián Bentor Upna; Urrutia Azcona, Aitor Upna; Sánchez Zábal, Pedro Upna; Zubiate Orzanco, Pablo Upna; López Torres, Diego Upna; Acha Morrás, Nerea de Upna; Matías Maestro, Ignacio Upna (Elsevier, 2014)   Contribución a Congreso / Biltzarrerako ekarpena  OpenAccess
      In the last 4 years, experimental evidences about the potential use of optical sensors based on Lossy Mode Resonances (LMR) have been presented in the literature. These LMR sensors have some similarities with Surface ...
    • Functionalized electrospun fibers for the design of novel hydrophobic and anticorrosive surfaces 

      Rivero Fuente, Pedro J. Upna; Yurrita Silanes, David; Berlanga Labari, Carlos Upna; Palacio, José; Rodríguez Trías, Rafael Upna (MDPI, 2018)   Artículo / Artikulua  OpenAccess
      In this work, a novel coating was deposited on aluminum alloy samples by using a combination of electrospinning and chemical vapor deposition (CVD-silanization) techniques in order to create a functionalized film with an ...
    • Hydrophobic and corrosion behavior of sol-gel hybrid coatings based on the combination of TiO2 NPs and fluorinated chains for aluminum alloys protection 

      Rivero Fuente, Pedro J. Upna; Maeztu Redin, Juan Deyo; Berlanga Labari, Carlos Upna; Miguel, Adrián; Palacio, José; Rodríguez Trías, Rafael Upna (MDPI, 2018)   Artículo / Artikulua  OpenAccess
      In this work, layers of a sol-gel hybrid matrix doped with metal oxide nanoparticles (TiO2 NPs) have been deposited on flat samples of AA6061-T6 aluminum alloy using the dip-coating technique, with the aim of obtaining ...
    • Layer-by-layer nano-assembly: a powerful tool for optical fiber sensing applications 

      Rivero Fuente, Pedro J. Upna; Goicoechea Fernández, Javier Upna; Arregui San Martín, Francisco Javier Upna (MDPI, 2019)   Artículo / Artikulua  OpenAccess
      The ability to tune the composition of nanostructured thin films is a hot topic for the design of functional coatings with advanced properties for sensing applications. The control of the structure at the nanoscale level ...
    • Micro and nanostructured materials for the development of optical fibre sensors 

      Elosúa Aguado, César Upna; Arregui San Martín, Francisco Javier Upna; Del Villar, Ignacio Upna; Ruiz Zamarreño, Carlos Upna; Corres Sanz, Jesús María Upna; Bariáin Aisa, Cándido Upna; Goicoechea Fernández, Javier Upna; Hernáez Sáenz de Zaitigui, Miguel Upna; Rivero Fuente, Pedro J. Upna; Socorro Leránoz, Abián Bentor Upna; Urrutia Azcona, Aitor Upna; Sánchez Zábal, Pedro Upna; Zubiate Orzanco, Pablo Upna; López Torres, Diego Upna; Acha Morrás, Nerea de Upna; Ascorbe Muruzabal, Joaquín Upna; Ozcariz Celaya, Aritz Upna; Matías Maestro, Ignacio Upna (MDPI, 2017)   Artículo / Artikulua  OpenAccess
      The measurement of chemical and biomedical parameters can take advantage of the features exclusively offered by optical fibre: passive nature, electromagnetic immunity and chemical stability are some of the most relevant ...
    • Multicolor layer-by-layer films using weak polyelectrolyte assisted synthesis of silver nanoparticles 

      Rivero Fuente, Pedro J. Upna; Goicoechea Fernández, Javier Upna; Urrutia Azcona, Aitor Upna; Matías Maestro, Ignacio Upna; Arregui San Martín, Francisco Javier Upna (Springer, 2013)   Artículo / Artikulua  OpenAccess
      In the present study, we show that silver nanoparticles (AgNPs) with different shape, aggregation state and color (violet, green, orange) have been successfully incorporated into polyelectrolyte multilayer thin films using ...
    • Multifunctional protective PVC-ZnO nanocomposite coatings deposited on aluminum alloys by electrospinning 

      Iribarren Zabalegui, Álvaro; Rivero Fuente, Pedro J. Upna; Berlanga Labari, Carlos Upna; Larumbe Abuin, Silvia Upna; Miguel, Adrián; Palacio, José; Rodríguez Trías, Rafael Upna (MDPI, 2019)   Artículo / Artikulua  OpenAccess
      This paper reports the use of the electrospinning technique for the synthesis of nanocomposite micro/nanofibers by combining a polymeric precursor with hydrophobic behavior like polyvinyl chloride (PVC) with nanoparticles ...
    • Nanomaterials for functional textiles and fibers 

      Rivero Fuente, Pedro J. Upna; Urrutia Azcona, Aitor Upna; Goicoechea Fernández, Javier Upna; Arregui San Martín, Francisco Javier Upna (Springer US, 2015)   Artículo / Artikulua  OpenAccess
      Nanoparticles are very interesting because of their surface properties, different from bulk materials. Such properties make possible to endow ordinary products with new functionalities. Their relatively low cost with ...