Now showing items 21-40 of 54

    • Effect of dielectrophoretic force in the self-assembly process of electrosprayed nanoparticles 

      Castañer Muñoz, Luis María; Bermejo Broto, Sandra; Domínguez Pumar, Manuel (2017-03-31)
      Article
      Open Access
      In this work the effect of the dielectrophoretic force (DEP) in the self-assembly process of nanoparticles electrosprayed onto a substrate, is examined. DEP force is originated by the electric field created by the electrospray ...
    • Effect of nanofluid conductivity and humidity on the self-assembly of colloidal crystals by means of electrospray 

      Coll Valentí, Arnau; Bermejo Broto, Sandra; Martín García, Isidro; Castañer Muñoz, Luis María (Institute of Electrical and Electronics Engineers (IEEE), 2015)
      Conference lecture
      Open Access
    • EWOD using nonaqueous liquids 

      Ahmadi, Maziar; Bermejo Broto, Sandra; Castañer Muñoz, Luis María (2015-04-18)
      Article
      Open Access
      Electrowetting on Dielectric (EWOD) has been studied for more than a decade and used for different applications but still there are few works on non-aqueous liquids such as mixtures of polyols. We have found that significant ...
    • Examen Final 

      Altet Sanahujes, Josep; Bermejo Broto, Sandra; Fernández Chimeno, Mireya; Martín García, Isidro; Orpella García, Alberto; Ortega Villasclaras, Pablo Rafael; Prat Viñas, Lluís; Puigdollers i González, Joaquim; Rodríguez Martínez, Ángel; Voz Sánchez, Cristóbal (Universitat Politècnica de Catalunya, 2013-01-08)
      Exam
      Restricted access to the UPC academic community
    • Examen Final 

      Prat Viñas, Lluís; Ortega Villasclaras, Pablo Rafael; López González, Juan Miguel; Martín García, Isidro; Fernández, Mireia; Bermejo Broto, Sandra; Altet Sanahujes, Josep; Puigdollers i González, Joaquim; Rodriguez, Angel; Voz Sánchez, Cristóbal (Universitat Politècnica de Catalunya, 2015-01-16)
      Exam
      Restricted access to the UPC academic community
    • Examen Final 

      Bermejo Broto, Sandra; Fernández Chimeno, Mireya; Guede Fernández, Federico; Martín García, Isidro; López González, Juan Miguel; Ortega Villasclaras, Pablo Rafael; Puigdollers i González, Joaquim; Rodríguez Martínez, Ángel; Vargas Drechsler, Manuel; Voz Sánchez, Cristóbal (Universitat Politècnica de Catalunya, 2019-01-15)
      Exam
      Restricted access to the UPC academic community
    • Fixed charge density in dielectrics deposited on c-Si using space charge region dominated lifetime measurements 

      Garin Escriva, Moises; Martín García, Isidro; Bermejo Broto, Sandra; Alcubilla González, Ramón (American Institute of Physics, 2007-06-29)
      Article
      Restricted access - publisher's policy
      Depletion region modulation (DRM) effect is often observed in photoconductance lifetime measurements of crystalline silicon wafers passivated by dielectric films. This effect is closely related to the space-charge region ...
    • From random to order: Colloidal crystals on non-flat surfaces 

      Coll Valentí, Arnau; Bermejo Broto, Sandra; Martín García, Isidro; Ortega Villasclaras, Pablo Rafael; Alcubilla González, Ramón (2016-03-05)
      Article
      Open Access
      © 2016 Elsevier B.V. All rights reserved. This paper introduces the possibility to produce 1-2 cm2 and tens of layers colloidal crystals on different non-flat surfaces by means of electrospray deposition. Two different ...
    • High voltage ultrathin-photovoltaic minimodules: fabrication technology and application to bioimplantable telesupplying 

      Bermejo Broto, Sandra; Silvestre Bergés, Santiago; Ortega Villasclaras, Pablo Rafael (2014-05-01)
      Article
      Restricted access - publisher's policy
      In this work we show small (0.49 cm2) and thin (<70 µm) photovoltaic mini-generators capable of providing open circuit voltages up to 99 V and short circuit currents of 43 µA, achieving a maximum density power of 4.8 mW/cm2. ...
    • High voltage ultrathin-photovoltaic minimodules: fabrication technology and application to bioimplantable telesupplying 

      Bermejo Broto, Sandra; Silvestre Bergés, Santiago; Ortega Villasclaras, Pablo Rafael (2013)
      Conference lecture
      Restricted access - publisher's policy
    • Impact of metallization techniques of surface passivation of high efficiency crystalline silicon solar cells 

      Coll Valentí, Arnau; Martín García, Isidro; Ortega Villasclaras, Pablo Rafael; Bermejo Broto, Sandra; López, Gema; Alcubilla González, Ramón (2013)
      Conference report
      Restricted access - publisher's policy
      Most of the high-efficiency c-Si solar cells are based on dielectric films that electrically passivate c-Si surface and must keep their passivation properties after metal deposition on top of them. This work studies the ...
    • Impedance modeling of silica nanoparticle metal insulator metal capacitors 

      Véliz Noboa, Bremnen Marino; Bermejo Broto, Sandra; Orpella García, Alberto; Castañer Muñoz, Luis María (2018-08-01)
      Article
      Open Access
      In this study, we have fabricated metal-insulator-metal (MIM) capacitors where the insulator layer is made of 255¿nm diameter silica nanospheres. The MIM devices have been characterized and modeled by electrochemical ...
    • Impedance spectroscopy interpretation of silica and polystyrene colloidal suspensions 

      Véliz Noboa, Bremnen Marino; Orpella García, Alberto; Domínguez Pumar, Manuel; Bermejo Broto, Sandra (2020-03-01)
      Article
      Open Access
      Impedance spectroscopy differences between colloidal 295-nm silica and 300-nm polystyrene nanoparticles in deionized water are analyzed in this work. Using two different two-electrode measurement setups, designed for this ...
    • Improving a nozzle tip with a guard ring for an electrospray system 

      Véliz Noboa, Bremnen Marino; Bermejo Broto, Sandra; Castañer Muñoz, Luis María (Institute of Electrical and Electronics Engineers (IEEE), 2017)
      Conference report
      Restricted access - publisher's policy
      The Electrospray technique allows the formation of small droplets from aqueous solutions that may contain nanoparticles of different materials in suspension, leading to the deposition of layers of the nanoparticles. The ...
    • Improving the hydrophobicity and electrowetting reversibility of teflon layers 

      Ahmadi Zeidabadi, Maziar; Bermejo Broto, Sandra; Castañer Muñoz, Luis María (2013)
      Conference lecture
      Restricted access - publisher's policy
    • Large area deposition of ordered nanoparticle layers by electrospray 

      Véliz Noboa, Bremnen Marino; Bermejo Broto, Sandra; Vives, Jordi; Castañer Muñoz, Luis María (2018-07-01)
      Article
      Open Access
      Mass production of ordered nanostructures with enhanced optical properties such as colloidal crystals for applications such as solar cells or organic light emitted diodes demands low-cost and large-scale manufacturing ...
    • Laser contact through electrosprayed alumina inverse opals on silicon 

      Coll Valentí, Arnau; Bermejo Broto, Sandra; Martín García, Isidro; Alcubilla González, Ramón (2015-02-18)
      Article
      Open Access
      In crystalline silicon (c-Si) solar cell field, an intensive effort is being paid to reduce the quantity of silicon material used in each cell in order to minimize its costs. With the reduction of wafer thickness, light ...
    • Light harvesting photovoltaic mini-generator 

      Bermejo Broto, Sandra; Silvestre Bergés, Santiago; Ortega Villasclaras, Pablo Rafael; Herrera, Gerard (2011-08-23)
      Article
      Restricted access - publisher's policy
      In this work, the design, fabrication and characterisation of a millimetre-size photovoltaic (PV) energy source is described. The fabrication process is based on p-type silicon-on-insulator wafers. It is shown that scaling ...
    • Low voltage 2D capacitive-coupled electrowetting 

      Ahmadi Zeidabadi, Maziar; Bermejo Broto, Sandra; Castañer Muñoz, Luis María (2013)
      Conference lecture
      Restricted access - publisher's policy
    • Low-cost thermal s-d air flow sensor 

      Domínguez Pumar, Manuel; Masana Nadal, Francisco; Jiménez Serres, Vicente; Bermejo Broto, Sandra; Amírola Sanz, Jorge; Ballester, Javier; Fueyo, Norberto; Castañer Muñoz, Luis María (2002-10)
      Article
      Open Access
      This paper describes the design and optimization of a hot-wire air flowmeter. A low-cost design of the packaging allows good thermal contact with the airflow, as well as good thermal isolation between the hot and cold ...