Now showing items 1-14 of 14

    • 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 ...
    • Continuous liquid-level sensor based on a long-period grating and microwave photonics filtering techniques 

      Ricchiuti, Amelia L.; Barrera, D.; Urrutia Azcona, Aitor Upna; Goicoechea Fernández, Javier Upna; Arregui San Martín, Francisco Javier Upna (IEEE, 2016)   Artículo / Artikulua  OpenAccess
      A fiber optic liquid-level sensor based on a long period grating (LPG) is proposed and experimentally validated. The principle of operation is based on a technique used to analyze microwave photonics filters. A 4-cm-long ...
    • Development of optical fiber humidity sensor based on silver nanoparticles-embedded coatings 

      Urrutia Azcona, Aitor Upna (2015)   Tesis doctoral / Doktoretza tesia  OpenAccess
      El desarrollo de nuevos materiales y métodos de deposición a escala nanométrica ha supuesto una auténtica revolución en muchas disciplinas de la investigación. En particular, en el campo de los sensores de fibra óptica, ...
    • 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, ...
    • Fiber-based early diagnosis of venous thromboembolic disease by label-free D-dimer detection 

      Zubiate Orzanco, Pablo Upna; Urrutia Azcona, Aitor Upna; Ruiz Zamarreño, Carlos Upna; Egea Urra, Josune; Fernández Irigoyen, Joaquín; Giannetti, Ambra; Baldini, Francesco; Díaz Lucas, Silvia Upna; Matías Maestro, Ignacio Upna; Arregui San Martín, Francisco Javier Upna; Santamaría, Enrique; Chiavaioli, Francesco; Del Villar, Ignacio Upna (Elsevier, 2019)   Artículo / Artikulua  OpenAccess
      D-dimer is a useful diagnostic biomarker for deep vein thrombosis or pulmonary embolism, collectively referred to as venous thromboembolism (VTE). The ability to detect in real-time the amount of D-dimer with a fast and ...
    • 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 ...
    • Labyrinth metasurface absorber for ultra-high-sensitivity terahertz thin film sensing 

      Jáuregui López, Irati Upna; Rodríguez Ulibarri, Pablo Upna; Urrutia Azcona, Aitor Upna; Kuznetsov, Sergei A.; Beruete Díaz, Miguel Upna (Wiley, 2018)   Artículo / Artikulua  OpenAccess
      In this work, a labyrinth metasurface sensor operating at the low‐frequency edge of the THz band is presented. Its intricate shape leads to a high electric field confinement on the surface of the structure, resulting in ...
    • Lossy mode resonance sensors based on nanocoated multimode-coreless-multimode fibre 

      Vicente Gómara, Adrián Upna; Santano, Desiree Upna; Zubiate Orzanco, Pablo Upna; Urrutia Azcona, Aitor Upna; Del Villar, Ignacio Upna; Ruiz Zamarreño, Carlos Upna (Elsevier, 2020)   Artículo / Artikulua
      In this work it is proved the ability to obtain lossy mode resonances (LMRs) in the transmission spectrum with multimode-coreless-multimode fibre optic structure coated with tin oxide on the coreless segment. The devices ...
    • 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 ...
    • 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 ...
    • Novel highly sensitive protein sensors based on tapered optical fibres modified with Au-based nanocoatings 

      Urrutia Azcona, Aitor Upna; Bojan, Kartheka; Marques, Leonel; Mullaney, Kevin; Goicoechea Fernández, Javier Upna; James, Stephen; Clark, Matt; Tatam, Ralph; Korposh, Sergiy (Hindawi Publishing Corporation, 2016)   Artículo / Artikulua  OpenAccess
      Novel protein sensors based on tapered optical fibres modified with Au coatings deposited using two different procedures are proposed. Au-based coatings are deposited onto a nonadiabatic tapered optical fibre using (i) a ...
    • Optical fiber sensors based on nanoparticle-embedded coatings 

      Urrutia Azcona, Aitor Upna; Goicoechea Fernández, Javier Upna; Arregui San Martín, Francisco Javier Upna (Hindawi Publishing Corporation, 2015)   Artículo / Artikulua  OpenAccess
      The use of nanoparticles (NPs) in scientific applications has attracted the attention of many researchers in the last few years. The use of NPs can help researchers to tune the physical characteristics of the sensing coating ...
    • Simultaneous measurement of humidity and temperature based on a partially coated optical fiber long period grating 

      Urrutia Azcona, Aitor Upna; Goicoechea Fernández, Javier Upna; Ricchiuti, Amelia L.; Barrera, D.; Arregui San Martín, Francisco Javier Upna (Elsevier, 2016)   Artículo / Artikulua  OpenAccess
      A humidity and temperature optical fiber sensor based on a long-period grating (LPG), which can provide simultaneous response to both magnitudes, is proposed and demonstrated via experiments. Previously, the LPG was fully ...