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1 to 50 of 390 results
  • Self-assembly of ordered silica nanostructures by electrospray

     Coll Valenti, Arnau; Bermejo Broto, Alexandra; Castañer Muñoz, Luis Maria
    Microelectronic engineering
    Vol. 121, p. 68-71
    DOI: 10.1016/j.mee.2014.03.031
    Date of publication: 2014-06-01
    Journal article

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    In this paper we introduce the electrospray technique as a suitable method to create SiO2 3D ordered nanostructures. We describe the experimental procedure and deposition parameters required. We have found that the use of a high electric field is mandatory to, first, induce the Taylor cone and then, to get 3D order while the nanospheres assemble in the substrate in the drying phase. (C) 2014 Elsevier B.V. All rights reserved.

  • Metal-insulator-metal capacitor using electrosprayed nanoparticles

     Veliz Noboa, Bremnen Marino; Bermejo Broto, Alexandra; Coll Valenti, Arnau; Castañer Muñoz, Luis Maria
    Applied physics letters
    Vol. 105, p. 013109-1-013109-4
    DOI: 10.1063/1.4889746
    Date of publication: 2014-07-07
    Journal article

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    An electrospray technique has been used to deposit SiO2 nanoparticles as insulator layer of a metal-insulator-metal device. Impedance spectroscopy measurements show that a 4.4 factor increase in capacitance is achieved compared to a continuous dielectric layer of the same permittivity and dimensions.

  • Grup de Recerca en Micro i Nanotecnologies (MNT)

     Alcubilla Gonzalez, Ramon; Puigdollers Gonzalez, Joaquin; Voz Sanchez, Cristobal; Rodriguez Martinez, Angel; Martin Garcia, Isidro; Bardes Llorensi, Daniel; Bermejo Broto, Alexandra; Calderer Cardona, Josep; Dominguez Pumar, Manuel M.; Prat Viñas, Luis; Garcies Salva, Pau; Jimenez Serres, Vicente; Lopez Gonzalez, Juan Miguel; Orpella Garcia, Alberto; Ortega Villasclaras, Pablo Rafael; Pons Nin, Joan; Silvestre Berges, Santiago; Garin Escriva, Moises; Colina Brito, Monica Alejandra; Morales Vilches, Ana Belen; Coll Valenti, Arnau; Lopez Rodriguez, Gema; Castañer Muñoz, Luis Maria
    Competitive project

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  • NASA Group Achievement Award: MSL REMS instrument development and Science Team

     Castañer Muñoz, Luis Maria; Dominguez Pumar, Manuel M.; Jimenez Serres, Vicente; Kowalski, Lukasz; Ricart Campos, Jordi
    Award or recognition

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  • Sub-Bandgap external quantum efficiency in Ti implanted Si heterojunction with intrinsic thin layer cells

     Silvestre Berges, Santiago; Boronat Moreiro, Alfredo; Colina Brito, Monica Alejandra; Castañer Muñoz, Luis Maria; Olea, Javier; Pastor, David; DelPrado, A.; Martil, Ignacio; Gonzalez Diaz, German; Luque, Antonio; Antolin, Elisa; Hernandez, Estela; Ramiro, Iñigo; Artacho, Irene; López, Esther; Martí, Antonio
    Japanese journal of applied physics
    Vol. 52, p. 122302-1-122302-5
    DOI: 10.7567/JJAP.52.122302
    Date of publication: 2013-11
    Journal article

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    In this work we present the manufacturing processes and results obtained from the characterization of heterojunction with intrinsic thin layer solar cells that include a heavily Ti ion implanted Si absorbing layer. The cells exhibit external circuit photocurrent at photon energies well below the Si bandgap. We discuss the origin of this below-bandgap photocurrent and the modifications in the hydrogenated amorphous intrinsic Si layer thickness to increase the open-circuit voltage.

  • Thermal response of AlN and CNx films as coatings of thin film anemometers

     Arroyo, J.; Silvestre Berges, Santiago; Coll Valenti, Arnau; Castañer Muñoz, Luis Maria
    Measurement
    Vol. 46, num. 4, p. 1421-1426
    DOI: 10.1016/j.measurement.2012.12.003
    Date of publication: 2013-05
    Journal article

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    Layers of AlN and CNx were investigated as suitable films to coat thin film anemometers because they are simultaneously electrical isolators and thermal conductors. Thermal time constants were measured and thermal equivalent models are proposed in this work. AlN performed better in the experiments.

  • Células solares de banda intermedia

     Martí, Antonio; Antolin, Elisa; Linares, P.G.; Ramiro, I.; López, E.; Artacho, Irene; Hernández, E.; Mellor, A.; Mendes, Manuel; Fuertes Marrón, David; Tobias, Ignacio; Tablero, C.; Cristobal, A.B.; Luque, Antonio; Martil, Ignacio; Olea, Javier; Pastor, David; Garcia Hemme, E.; Hernansanz, R.; DelPrado, A.; Gonzalez Diaz, German; Ripalda, J.M.; González, Yolanda; Briones, F.; Silvestre Berges, Santiago; Boronat Moll, Artur; Castañer Muñoz, Luis Maria
    Revista española de física
    Vol. 27, num. 2, p. 20-22
    Date of publication: 2013-05-14
    Journal article

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    Las células solares de banda intermedia se inventaron en España. Constituyen una propuesta para aumentar la eficiencia de las células solares por encima del límite de Shockley y Queisser para células de un solo gap. El número de ideas para llevarlas a la práctica (desde la utilización de puntos cuánticos a la implantación selectiva de impurezas) se ha ido expandiendo a medida que nuestra comprensión ha ido aumentando. En este artículo repasamos el concepto de célula solar de banda intermedia y algunas de estas ideas para llevarla a la práctica.

  • Self-assembly of ordered polystyrene and silica nanostructures by electrospray

     Coll Valenti, Arnau; Bermejo Broto, Alexandra; Castañer Muñoz, Luis Maria
    International Conference on Micro and Nano Engineering
    p. 329
    Presentation's date: 2013-09-17
    Presentation of work at congresses

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  • Influence of hydrogen on the optical absorption response of GaAs(Ti) films deposited by R.F. sputtering

     Boronat Moreiro, Alfredo; Silvestre Berges, Santiago; Castañer Muñoz, Luis Maria
    Spanish Conference on Electron Devices
    p. 357-360
    DOI: 10.1109/CDE.2013.6481416
    Presentation's date: 2013-02
    Presentation of work at congresses

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    In the present work we have investigated the optical absorption behavior of GaAs(Ti) films deposited by r.f sputtering technique under different H2 partial pressures. In previous work we have already demonstrated the feasibility to obtain GaAs films with high dose of Ti, which we refer to as GaAs(Ti). Any absorption peak, which could be related with the presence of an intermediate band, has been identified. The low Etauc parameter together with a broad Urbach tail of the films make us to suspect that the possible presence of an absorption peak could be hidden. The incorporation of H2 on sputtered GaAs films have demonstrated before a shift of the Etauc parameter to higher values and a reduction of the Urbach tail.

  • Nanohole particle filling by electrospray

     Coll Valenti, Arnau; Bermejo Broto, Alexandra; Castañer Muñoz, Luis Maria
    Spanish Conference on Electron Devices
    p. 203-206
    DOI: 10.1109/CDE.2013.6481378
    Presentation's date: 2013-02-12
    Presentation of work at congresses

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    Nanostructuring materials such as silicon provides a good technology to fabricate optical and sensing devices. The possibility to fill the pores or channels with different material opens the way to new applications. In this work, we study the electrokinetics of electrospraying technique to fill porous material with nanobeads. The simulations take into account a photonic crystal topology applying a difference potential of 14 kV. Measurements show the viability of filling alumina nanoporous with 360nm polyestyrene nanospheres.

    Nanostructuring materials such as silicon provides a good technology to fabricate optical and sensing devices. The possibility to fill the pores or channels with different material opens the way to new applications. In this work, we study the electrokinetics of electrospraying technique to fill porous material with nanobeads. The simulations take into account a photonic crystal topology applying a difference potential of 14 kV. Measurements show the viability of filling alumina nanoporous with 360nm polyestyrene nanospheres.

  • Improving the hydrophobicity and electrowetting reversibility of teflon layers

     Ahmadi Zeidabadi, Maziar; Bermejo Broto, Alexandra; Castañer Muñoz, Luis Maria
    International Conference on Micro and Nano Engineering
    p. 293
    Presentation's date: 2013-09-17
    Presentation of work at congresses

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  • Low voltage 2D capacitive-coupled electrowetting

     Ahmadi Zeidabadi, Maziar; Bermejo Broto, Alexandra; Castañer Muñoz, Luis Maria
    International Conference on Micro and Nano Engineering
    p. 466
    Presentation's date: 2013-09-18
    Presentation of work at congresses

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    Colloidal crystals by electrospraying polystyrene nanofluids  Open access

     Coll Valenti, Arnau; Bermejo Broto, Alexandra; Hernández García, David; Castañer Muñoz, Luis Maria
    Nanoscale research letters
    Vol. 8, num. 26
    DOI: 10.1186/1556-276X-8-26
    Date of publication: 2013-01-12
    Journal article

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  • Optical and compositional characterization of GaAs(Ti) thin films deposited by R.F. magnetron sputtering

     Boronat Moll, Artur; Silvestre Berges, Santiago; Castañer Muñoz, Luis Maria
    Journal of non-crystalline solids
    Vol. 359, num. 1, p. 21-26
    DOI: 10.1016/j.jnoncrysol.2012.09.017
    Date of publication: 2013-01
    Journal article

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    GaAs thin films with Ti incorporated, to which we refer to as GaAs(Ti), have been deposited by R.F. sputtering on fused silica and c-GaAs substrates under different process conditions. The films were characterized by EPMA, XPS and XRD to study the composition and structural dependence on the deposition conditions, paying special attention on the Ti content of the films. The optical responses of the films were analyzed by spectrofotometric, PDS and FTIR measurements. The Ti content is in all the samples above 1020 atoms/cm3, so we can consider them as GaAs films highly Ti doped. It has been observed that an evolution of the Ga/As atomic content in relation with the Ti incorporation, which together with the results obtained from XPS measurements, indicates a possible substitution of Ga by Ti atoms in the deposited films.

  • Low pressure spherical thermal anemometer for space missions

     Kowalski, Lukasz; Jimenez Serres, Vicente; Dominguez Pumar, Manuel M.; Gorreta Marine, Sergio; Silvestre Berges, Santiago; Castañer Muñoz, Luis Maria
    Annual IEEE Conference on Sensors
    p. 1537-1540
    Presentation's date: 2013-11
    Presentation of work at congresses

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    A novel spherically shaped thermal anemometer for low pressure, Mars-like conditions, is described. The concept has been designed using finite element multyphysics simulations to find out the thermal conductance to the ambient for varying conditions of wind speed and direction and ambient pressure and temperature. A prototype 1cm diameter suitable to work under these environment in the range 0.25-10m/s speed has been build using 3D printing and tested inside a low pressure chamber. The protopype shown has two separated hemispheres, independently heated above the ambient temperature, providing angle sensitivity in one plane. Measurements of the heating power in both hemispheres required to keep an overheat of 30K are shown as a function of the wind direction showing good sensitivity at 0.5m/s. One improvement of this sensor is the means provided to also heat the core of the sphere where the circuit board is located thereby avoiding most of the conduction losses to the supports. The concept is scalable to other wind speed and pressure conditions and also to full 3D measurements.

    The novelty of this 2D thermal anemometer is the spherical compact and robust design with improved sensitivity in the range of 600-900Pa of carbon dioxide pressure and 0.25 to 10 m/s wind speed. The small size (11.2mm diameter) and unprecedented 3D printing fabrication of a low emissivity silver shell allows to place inside of the sphere the platinum heating and sensing resistors. It improves the performances of the Viking, Pathfinder and Curiosity wind sensors for the surface of Mars. The conduction losses to the support are largely suppressed by also heating the insertion point at the same temperature than the shell Overall, the convection power to the ambient is in the range of 30mW per 10K of overheat respect to the ambient, which is about the 68% of the total power. Splitting the spherical shell into two hemispheres provides angular sensitivity and the wind direction is found from the convection power differences between them. The concept can be easily extended to three-dimensional sensing by using three of these sensors in different planes. It can also be applied to aeronautical engines such as stratospheric balloons.

  • REMS: the environmental sensor suite for the Mars Science Laboratory rover

     Gómez Elvira, J.; Armiens, C.; Castañer Muñoz, Luis Maria; Dominguez Pumar, Manuel M.; Genzer, M.; Gómez, Francisco; Haberle, Robert M.; Harris, Aiden M.; Jimenez Serres, Vicente; Kahanpää, H.; Kowalski, Lukasz; Lepinette, A.; Martín, Jacques Wesley; Martínez Frías, Jesús; McEwan, I.; Mora, L.; Moreno, Jose C.; Navarro, S.; De Pablo, M.A.; Peinado, V.; Peña, A.; Polkko, J.; Ramos Sainz, Miguel; Renno, Nilton O.; Ricart, Jordi; Richardson, M.; Rodríguez Manfredi, José Antonio; Romeral, Julio; Sebastián, Eduardo M.; Serrano, Jaime; De La Torre Juárez, Manuel; Torres, Jose Antonio; Torrero, F.; Urquí, R.; Vázquez, L.; Velasco, T.; Verdasca, J.; Zorzano, M.P.; Martín Torres, Javier
    Space science reviews
    Vol. 170, num. 1-4, p. 583-640
    DOI: 10.1007/s11214-012-9921-1
    Date of publication: 2012-09
    Journal article

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    The Rover Environmental Monitoring Station (REMS) will investigate environ- mental factors directly tied to current habitability at the Martian surface during the Mars Sci- ence Laboratory (MSL) mission. Three major habitability factors are addressed by REMS: the thermal environment, ultraviolet irradiation, and water cycling. The thermal environment is determined by a mixture of processes, chief amongst these being the meteorological. Ac- cordingly, the REMS sensors have been designed to record air and ground temperatures, pressure, relative humidity, wind speed in the horizontal and vertical directions, as well as ultraviolet radiation in different bands. These sensors are distributed over the rover in four places: two booms located on the MSL Remote Sensing Mast, the ultraviolet sensor on the rover deck, and the pressure sensor inside the rover body. Typical daily REMS observa- tions will collect 180 minutes of data from all sensors simultaneously (arranged in 5 minute hourly samples plus 60 additional minutes taken at times to be decided during the course of the mission). REMS will add significantly to the environmental record collected by prior missions through the range of simultaneous observations including water vapor; the ability to take measurements routinely through the night; the intended minimum of one Martian year of observations; and the first measurement of surface UV irradiation. In this paper, we describe the scientific potential of REMS measurements and describe in detail the sensors that constitute REMS and the calibration procedures

  • Optical absorption of radio frequency sputtered GaAs(Ti) films

     Boronat Moll, Artur; Silvestre Berges, Santiago; Fuertes Marrón, David; Castañer Muñoz, Luis Maria; Martí, A.; Luque, Antonio
    Journal of materials science. Materials in electronics
    Vol. 24, num. 3, p. 993-998
    DOI: 10.1007/s10854-012-0864-9
    Date of publication: 2012-08-14
    Journal article

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    Composition and optical absorption of thin films of GaAs(Ti) and GaAs, deposited by sputtering on glass substrates under different process conditions, have been investigated. The thin films obtained are typically 200 nm thick. ToF–SIMS measurements show a quite constant concentration and good uniformity of Ti profiles along the GaAs(Ti) layers in all cases and EPMA results indicate that Ti content increases with the substrate temperature in the sputtering process. Measurements of the transmittance and reflectance spectra of the GaAs and GaAs(Ti) thin films have been carried out. In the optical characterization of the films it is found that optical absorption is enhanced in all samples containing Ti. The determination of the optical gap from the optical absorption, shows optical gap variations from 1.15 to 1.29 eV in the GaAs thin films, and from 0.83 to 1.13 eV in the GaAs(Ti) thin films. The differences in absorption and EgTAUC observed between samples of GaAs and GaAs(Ti) are consistent with the presence of an intermediate band.

  • Modeling and measuring driving options for electrowetting-based devices

     Castañer Muñoz, Luis Maria; Di Virgilio, Vito; Adhmani, Maziar; Bermejo Broto, Alexandra
    Journées Franco-Espagnoles
    p. 1-2
    Presentation's date: 2012-11-22
    Presentation of work at congresses

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  • CMOS processing for MEMS devices and their applications

     Montanyà Silvestre, Josep
    Department of Electronic Engineering, Universitat Politècnica de Catalunya
    Theses

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  • Luminartia con óptica líquida de orientación controlada mediante señal eléctrica

     Castañer Muñoz, Luis Maria
    Date of request: 2012-12-21
    Invention patent

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    Luminaria con óptica líquida de orientación controlada mediante señal eléctrica, aplicable para iluminación doméstica o profesional y para automóviles u otros vehículos, que comprende, al menos una fuente de luz (4), que puede ser un diodo LED, y una óptica (6) líquida constituida por un dispositivo electro-óptico líquido cuya forma se modifica mediante la aplicación de una señal eléctrica para controlar la dirección de la luz emitida. Dicha óptica (6) comprende varios electrodos activos (7b) y un electrodo de masa (7a) con un recubrimiento hidrofóbico en una cavidad que contiene dos líquidos transparentes (9, 10) inmiscibles entre sí y de distinto índice de refracción, siendo al menos uno (9) de ellos eléctricamente conductor.

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    Wettability increase by "corona" ionization  Open access

     Di Virgilio, Vito; Bermejo Broto, Alexandra; Castañer Muñoz, Luis Maria
    Langmuir
    Vol. 27, num. 5, p. 9614-9620
    DOI: 10.1021/la2019583
    Date of publication: 2011-06-28
    Journal article

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    Experiments showing an increase in the wettability of a hydrophobic surface when using corona air ionization are shown. Photoluminiscence observations support the predictions of charge accumulation at the triple line and confirm previous experiments. In all of the experiments, the contact angle was in the saturation regime at a value smaller than that predicted by the condition of a zero value for the solid-liquid surface tension. The PDMS did not show any deterioration due to the corona exposure under the experimental conditions used. The contact angle is shown to increase with humidity.

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    Towards photovoltaic powered artificial retina  Open access

     Silvestre Berges, Santiago; Bermejo Broto, Alexandra; Guasch Murillo, Daniel; Ortega Villasclaras, Pablo Rafael; Castañer Muñoz, Luis Maria
    Journal of Accessibility and Design for All
    Vol. 1, num. 1, p. 3-11
    Date of publication: 2011
    Journal article

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    The aim of this article is to provide an overview of current and future concepts in the field of retinal prostheses, and is focused on the power supply based on solar energy conversion; we introduce the possibility of using PV minimodules as power supply for a new concept of retinal prostheses: Photovoltaic Powered Artificial Retina (PVAR). Main characteristics of these PV modules are presented showing its potential for this application.

  • Sensor de viento para la superficie de marte para la misión Metnet (fase inicial)

     Jimenez Serres, Vicente; Silvestre Berges, Santiago; Castañer Muñoz, Luis Maria
    Competitive project

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  • MEMS Devices

     Quero, J.M.; Luque Estepa, Antonio; Castañer Muñoz, Luis Maria; Rodriguez Martinez, Angel; Ionescu, Adrian; Fernández-Bolaños, Montserrat; Faraone, Lorenzo; Dell, John M.
    Date of publication: 2011-02-01
    Book chapter

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  • Optical measurements of GaAs(Ti) thin films sputtered on GaAs

     Boronat Moreiro, Alfredo; Silvestre Berges, Santiago; Castañer Muñoz, Luis Maria
    Spanish Conference on Electron Devices
    p. 253-254
    Presentation's date: 2011-02
    Presentation of work at congresses

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    Modeling and simulation of a cost-effective microfluidic circuit for particles' manipulation  Open access

     Di Virgilio, Vito; Bermejo Broto, Alexandra; Castañer Muñoz, Luis Maria; Coll Valenti, Arnau
    Spanish Conference on Electron Devices
    p. 1-6
    Presentation's date: 2011-02
    Presentation of work at congresses

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  • Optical measurements on GaAs(Ti) thin films sputtered on GaAs

     Boronat Moreiro, Alfredo; Silvestre Berges, Santiago; Castañer Muñoz, Luis Maria
    Spanish Conference on Electron Devices
    p. 1-3
    DOI: 10.1109/SCED.2011.5744250
    Presentation's date: 2011
    Presentation of work at congresses

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    Some sputtering processes of GaAs(Ti) onto c-GaAs have been carried out in order to obtain thin films as candidates to be intermediate band photovoltaic materials. This work presents the results obtained in the study of the absorptance, from transmittance and reflectance responses, in samples obtained at different conditions of temperature and power during the sputtering deposition.

  • PROCEDIMIENTO PARA EL DEPÓSITO ORDENADO DE CAPAS DE METAMATERIALES A PARTIR DE SOLUCIONES COLOIDALES DE MICRO O NANO ESFERAS

     Bermejo Broto, Alexandra; Castañer Muñoz, Luis Maria; Coll Valenti, Arnau
    Date of request: 2011-06-28
    Invention patent

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    Procedimiento para el depósito ordenado de capas de metamateriales a partir de soluciones coloidales de micro o nano esferas, que comprende las etapas:

    (a) se metalizan determinadas zonas del sustrato (3), y se prepara dicha solución coloidal,

    (b) en el interior de una cámara (7) cerrada con atmósfera de nitrógeno, se dispone una bomba (4) con la solución coloidal, conectada a una aguja inyectora (1) y dicha aguja inyectora (1) conectada a su vez a un electrodo (5), mientras que el otro electrodo (6) se conecta a las zonas metalizadas de la superficie del sustrato (3),

    (c) se alimenta la solución coloidal desde la bomba (4) hasta la aguja inyectora (1), y se aplica una diferencia de potencial entre dicha solución coloidal y el sustrato (3), depositándose las capas con ordenación tridimensional sobre las zonas metalizadas del sustrato (3).

  • Charge-Coupled Transient Model for Electrowetting

     Castañer Muñoz, Luis Maria; Di Virgilio, Vito; Bermejo Broto, Alexandra
    Langmuir
    Vol. 26, num. 20, p. 16178-16185
    DOI: 10.1021/la102777m
    Date of publication: 2010-10-19
    Journal article

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  • Thermal modelling of the chip for the REMS wind sensor

     Kowalski, Lukasz; Ricart, Jordi; Jimenez Serres, Vicente; Dominguez Pumar, Manuel M.; Castañer Muñoz, Luis Maria
    International journal of numerical modeling. Electronic networks devices and fields
    Vol. 23, num. 48, p. 340-353
    DOI: 10.1002/jnm.v23:4/5
    Date of publication: 2010-07
    Journal article

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  • Dielectric charging characterization on microelectromechanical switches by discharge current transient

     Molinero Giles, David; Castañer Muñoz, Luis Maria
    Applied physics letters
    Vol. 96, num. 18, p. 1-3
    DOI: 10.1063/1.3427363
    Date of publication: 2010-03-06
    Journal article

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    A miniaturized two axis sun sensor for attitude control of nano-satellites  Open access

     Ortega Villasclaras, Pablo Rafael; Lopez Rodriguez, Gema; Ricart Campos, Jordi; Dominguez Pumar, Manuel M.; Castañer Muñoz, Luis Maria; Quero, J.M.; Tarrida, C. L.; Reina, M.; Gras, Ana; Angulo, M.
    IEEE sensors journal
    Vol. 10, num. 10, p. 1623-1632
    DOI: 10.1109/JSEN.2010.2047104
    Date of publication: 2010-10-10
    Journal article

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    This paper describes the design, fabrication, characterization, and satellite integration of a miniaturized two axis sun sensor which has been used in the attitude control system of the Spanish nano-satellite NANOSAT-1B. This device is made of four silicon photodiodes monolithically integrated in a crystalline silicon substrate, protected by a transparent cover glass assembled on the same silicon die against space radiation damage. The sensor fabrication combines standard silicon processing technology with a high performance solar cell fabrication process. The sensor, including electronics and mechanical and electrical interfacing with the satellite, has a small size (3 cm 3 cm) and low weight (24 gr.), with a sun field-of-view greater than with an angle accuracy better than 0.15 . Three of these sensors have already been integrated in the NANOSAT-1B platform that has been successfully launched in July 2009.

  • Simulation of photonic crystals particle filling by electrospray

     Coll Valenti, Arnau; Di Virgilio, Vito; Bermejo Broto, Alexandra; Castañer Muñoz, Luis Maria
    CONSOL CONFERENCE
    p. 1-5
    Presentation's date: 2010-11-18
    Presentation of work at congresses

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    Photonic crystals are widely used in optical applications as waveguides and band filters. Filling the periodic structural material of photonic crystals with other materials is very useful in order to change the optical properties of the devices. In this paper electrostatic COMSOL simulations describing an electrospray deposition of particles in macroporous structures are performed.

  • Dynamic simulation of particle self-assembly applied to microarray technology

     Di Virgilio, Vito; Coll Valenti, Arnau; Bermejo Broto, Alexandra; Castañer Muñoz, Luis Maria
    CONSOL CONFERENCE
    p. 1-5
    Presentation's date: 2010-11-17
    Presentation of work at congresses

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    In this work we want to explore some techniques, microfluidic and electrosprayionization based, suitable for dynamic microarrays' fabrication. The fabrication techniques are based on manipulation and self-assembly of selective coated micro and nanobeads. The simulation will include electro-osmotic flow, species transport, and electrostatics.

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    Study of GaAs(Ti) thin films as candidates for IB solar cells manufacturing  Open access

     Silvestre Berges, Santiago; Boronat Moreiro, Alfredo; Castañer Muñoz, Luis Maria
    IEEE Photovoltaic Specialists Conference
    p. 1210-1212
    Presentation's date: 2010-06
    Presentation of work at congresses

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    Thin films of GaAs(Ti) have been deposited by sputtering on glass and n_GaAs substrates under different process conditions. Optical characteristics of these samples have been analyzed to study the potential of this material in intermediate Band solar cell manufacturing.

  • Solar Cells: materials, manufacture and operation. Edición en Chino.

     Markvart, T.; Castañer Muñoz, Luis Maria
    Date of publication: 2009-04
    Book

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  • Premi Jaume Vicens Vives a la Qualitat en la Docència 2009

     Castañer Muñoz, Luis Maria
    Award or recognition

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  • Modeling and measuring transient discharge current of microelectromechanical switches after dielectric charging by voltage stress

     Molinero, D; Castaner, L; Castañer Muñoz, Luis Maria
    Applied physics letters
    Vol. 94, num. 043503, p. 1
    Date of publication: 2009-01
    Journal article

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  • Access to the full text
    Interdigitated u-electrodes for development of an impedimetric immunosensor for atrazine detection  Open access

     Valera Cano, Enrique Andres; Ramón-Azcón, Javier; Sanchez, F. J.; Marco, M. P.; Rodriguez Martinez, Angel; Castañer Muñoz, Luis Maria
    Spanish Conference on Electron Devices
    p. 278-280
    Presentation of work at congresses

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    This contribution describes the development of an impedimetric immunosensor for atrazine detection. This immunosensor is based on the use of interdigitated metallic μ-electrodes (IDμEs) The method described in this work does not use any redox mediator and relies on the direct detection of immunochemical competitive reaction between the pesticide and a haptenized-protein immobilized on interdigitated μ-electrodes for the specific antibody. The immunoreagents used were specifically developed to detect atrazine. The immunochemical detection of this pesticide is achieved without using any label. The immunosensor shows a limit of detection of 8.34±1.37 μg L-1, witch is lower than the Maximun Residue Level (MRL) (50μg L-1)established by EU (European Union)for residues of atrazine as herbicide in the wine grapes and other foodstuff products.

  • Comparison of bulk micromachined high voltage light scavenger

     Bermejo Broto, Alexandra; Ortega Villasclaras, Pablo Rafael; Castañer Muñoz, Luis Maria
    Spanish Conference on Electron Devices
    p. 91-93
    Presentation's date: 2009-02
    Presentation of work at congresses

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    c-Si photovoltaic arrays  Open access

     Bermejo Broto, Alexandra; Ortega Villasclaras, Pablo Rafael; Castañer Muñoz, Luis Maria
    Anual Meeting of the IEEE Photonics Society
    p. 119-120
    Presentation of work at congresses

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    Crystalline silicon small photovoltaic arrays are shown. Electrical isolation of individual cells and series connection between them to integrate series arrays are discussed. High open circuit voltage values in the range of 100 V and power densities of 7.2 mW/cm2 have been achieved.

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    Analysis of GaAs-Ti thin films deposited by sputtering onto c-Si and GaAs  Open access

     Silvestre Berges, Santiago; Puigdollers Gonzalez, Joaquin; Boronat Moreiro, Alfredo; Castañer Muñoz, Luis Maria
    Spanish Conference on Electron Devices
    p. 5-7
    Presentation's date: 2009-02-11
    Presentation of work at congresses

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    Some sputtering processes of GaAs and Ti onto glass, c-Si and c-GaAs substrates have been carried out in order to obtain thin films as candidates to be intermediate band photovoltaic materials. This work presents first results concerning the optical and structural properties of the different deposited thin films.

  • MICRO I NANOTECNOLOGIES

     Castañer Muñoz, Luis Maria
    Competitive project

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  • STUDY OF DIELECTRIC CHARGING EFFECTS ON MEMS SWITCHES.

     Molinero Giles, David
    Department of Electronic Engineering, Universitat Politècnica de Catalunya
    Theses

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  • MEMS solar sensor testing for satellite applications

     García Ortega, J.; Tarrida, C. L.; Quero, J.M.; Delgado, F.J.; Ortega Villasclaras, Pablo Rafael; Castañer Muñoz, Luis Maria; Reina, M.; Angulo, M.; Morilla, Y.; García López, J.
    Spanish Conference on Electron Devices
    p. 345-348
    Presentation of work at congresses

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  • Método para la fabricación de una célula solar de silicio de banda intermedia

     Puigdollers Gonzalez, Joaquin; Silvestre Berges, Santiago; Castañer Muñoz, Luis Maria; Martí, Vega A; Luque, A; Antolín, E; Olea, J; Pastor, D; Martil, Ignacio
    Date of request: 2009-02-19
    Invention patent

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    Método para la fabricación de una célula solar de silicio de banda intermedia.

    Es posible crear materiales de banda intermedia en silicio mediante la implantación iónica en dosis elevadas de elementos que produzcan centros profundos en el silicio. Sin embargo, el material de banda intermedia (4) se crea en la superficie de la oblea implantada (7) planteándose una dificultad técnica ya que, para fabricar una célula solar completa, resulta necesario envolver este material de banda intermedia entre un semiconductor de tipo p (5) y otro de tipo n (6) utilizando un proceso de baja temperatura que evite la segregación y formación de clústeres del elemento implantado. En esta patente, esta dificultad se resuelve creando la estructura p n mediante la deposición de capas de silicio amorfo hidrogenado de calidad a baja temperatura.

  • Manipulación de micro-nano partículas en 2D y 3D

     Silvestre Berges, Santiago; Castañer Muñoz, Luis Maria; Rodriguez Martinez, Angel; Bermejo Broto, Alexandra; Bardes Llorensi, Daniel; Lopez Gonzalez, Juan Miguel
    Competitive project

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