Articles

Articles 34 records found  beginprevious22 - 31next  jump to record: Search took 0.01 seconds. 
22.
5 p, 1.3 MB Modeling of hysteretic Schottky diode-like conduction in Pt/BiFeO3/SrRuO3 switches / Miranda, Enrique Alberto (Universitat Autònoma de Barcelona. Departament d'Enginyeria Electrònica) ; Jiménez Jiménez, David (Universitat Autònoma de Barcelona. Departament d'Enginyeria Electrònica) ; Tsurumaki-Fukuchi, A. (National Institute of Advanced Industrial Science and Technology (AIST)) ; Blasco, J. (Universitat Autònoma de Barcelona. Departament d'Enginyeria Electrònica) ; Yamada, H. (National Institute of Advanced Industrial Science and Technology (AIST)) ; Suñé, Jordi, 1963- (Universitat Autònoma de Barcelona. Departament d'Enginyeria Electrònica) ; Sawa, A. (National Institute of Advanced Industrial Science and Technology (AIST))
The hysteresis current-voltage (I-V) loops in Pt/BiFeO3/SrRuO3 structures are simulated using a Schottky diode-like conduction model with sigmoidally varying parameters, including series resistance correction and barrier lowering. [...]
2014 - 10.1063/1.4894116
Applied physics letters, Vol. 105 (August 2014) , p. 82904-01/82904-04  
23.
31 p, 1.9 MB Use of nanomaterials for impedimetric DNA sensors : a review / Bonanni, Alessandra (Universitat Autònoma de Barcelona. Grup Sensors i Biosensors) ; Valle Zafra, Manuel del (Universitat Autònoma de Barcelona. Departament de Química)
This review presents the state of the art of DNA sensors (or genosensors) that utilize electrochemical impedance spectroscopy as the transduction technique. As issue of current interest, it is centered on the use of nanomaterials to develop or to improve performance of these specific biosensors. [...]
2010 - 10.1016/j.aca.2010.08.022
Analytica chimica acta, Vol. 678, Issue 1 (Sep 2010) , p. 7-17  
24.
22 p, 3.1 MB Three different signal amplification strategies for the impedimetric sandwich detection of thrombin / Ocaña Tejada, Cristina (Universitat Autònoma de Barcelona. Grup Sensors i Biosensors) ; Valle Zafra, Manuel del (Universitat Autònoma de Barcelona. Departament de Química)
In this work, we report a comparative study on three highly specific amplification strategies for the ultrasensitive detection of thrombin with the use of aptamer sandwich protocol. The protocol consisted on the use of a first thrombin aptamer immobilized on the electrode surface, the recognition of thrombin protein, and the reaction with a second biotinylated thrombin aptamer forming the sandwich. [...]
2016 - 10.1016/j.aca.2016.01.027
Analytica chimica acta, Vol. 912 (March 2016) , p. 117-124  
25.
23 p, 6.5 MB DNA polymorphism sensitive impedimetric detection on gold-nanoislands modified electrodes / Bonanni, Alessandra (Nanyang Technological University. School of Physical and Mathematical Sciences) ; Pividori, María Isabel (Universitat Autònoma de Barcelona. Departament de Química) ; Valle Zafra, Manuel del (Universitat Autònoma de Barcelona. Grup de Sensors i Biosensors)
Nanocomposite materials are being increasingly used in biosensing applications as they can significantly improve biosensor performance. Here we report the use of a novel impedimetric genosensor based on gold nanoparticles graphite-epoxy nanocomposite (nanoAu-GEC) for the detection of triple base mutation deletion in a cystic-fibrosis (CF) related human DNA sequence. [...]
2015 - 10.1016/j.talanta.2015.01.004
Talanta, Vol. 136 (May 2015) , p. 95-101  
26.
22 p, 1.4 MB Aptamer-antibody sandwich assay for cytochrome c employing a MWCNT platform and the electrochemical impedance technique / Ocaña Tejada, Cristina (Universitat Autònoma de Barcelona. Sensors and Biosensors Group) ; Lukic, Sonja (University of Regensburg. Institut of Analytical Chemistry, Chemo- and Biosensors) ; Valle Zafra, Manuel del (Universitat Autònoma de Barcelona. Sensors and Biosensors Group)
We report on a sensitive aptamer-antibody interaction-based assay for cytochrome c (Cytc) using electrochemical impedance. 4-Amino benzoic acid is used for the oriented immobilization of aminated aptamers onto multi-walled carbon nanotubes on the surface of a screen-printed electrode via electrochemical grafting. [...]
2015 - 10.1007/s00604-015-1540-6
Mikrochimica acta, Vol. 182, Issue 11 (August 2015) , p. 2045-2053  
27.
10 p, 3.6 MB Toward nanoanalytical chemistry : case of nanomaterial integration into [bio]sensing systems / Merkoçi, Arben (Universitat Autònoma de Barcelona. Grup de Recerca de Sensors i Biosensors) ; Alegret, Salvador, 1947- (Universitat Autònoma de Barcelona. Grup de Recerca de Sensors i Biosensors)
Analytical chemistry-oriented nanotechnology, or nanoanalytical chemistry, at nanometer or macroscale, at both nanometer and macroscale dimensions, is on its way to becoming a field of great potential. [...]
La nanotecnologia orientada al camp de la química analítica, o química nanoanalítica, ja sigui a escala nanomètrica o a macroescala, s'està convertint en una matèria de gran potencial. Els conceptes associats a aquesta química nanoanalítica són acceptats ràpidament, entre d'altres, pel camp de la biologia molecular. [...]

2005
Contributions to science, Vol. 3, Núm. 1 (2005) , p. 57-66  
28.
4 p, 611.3 KB Current-induced cleaning of graphene / Moser, Joel (Centre d'Investigació en Nanociència i Nanotecnologia (CIN2)) ; Barreiro Megino, Amelia (Centre d'Investigació en Nanociència i Nanotecnologia (CIN2)) ; Bachtold, Adrian (Centre d'Investigació en Nanociència i Nanotecnologia (CIN2)) ; American Physical Society
A simple yet highly reproducible method to suppress contamination of graphene at low temperature inside the cryostat is presented. The method consists of applying a current of several milliamperes through the graphene device, which is here typically a few microns wide. [...]
2007 - 10.1063/1.2789673
Applied physics letters, Vol. 91, Issue 16 (October 2007) , p. 163513/1-163513/3  
29.
4 p, 494.5 KB Nondestructive thickness measurement of biological layers at the nanoscale by simultaneous topography and capacitance imaging / Casuso, Ignacio (Universitat de Barcelona. Departament d'Electrònica) ; Fumagalli, Laura (Universitat de Barcelona. Departament d'Electrònica) ; Gomila, Gabriel (Universitat de Barcelona. Departament d'Electrònica) ; Padrós, Esteve (Universitat Autònoma de Barcelona. Departament de Bioquímica i Biologia Molecular) ; American Physical Society
Nanoscale capacitance images of purple membrane layers are obtained simultaneously to topography in a nondestructive manner by operating alternating current sensing atomic force microscopy in jumping mode. [...]
2007 - 10.1063/1.2767979
Applied physics letters, Vol. 91, Issue 6 (August 2007) , p. 063111/1-063111/3  
30.
5 p, 1.3 MB Inducing bistability with local electret technology in a microcantilever based non-linear vibration energy harvester / López Suárez, Miquel (Universitat Autònoma de Barcelona. Departament d'Enginyeria Electrònica) ; Agustí Batlle, Jordi (Universitat Autònoma de Barcelona. Departament d'Enginyeria Electrònica) ; Torres Canals, Francisco (Universitat Autònoma de Barcelona. Departament d'Enginyeria Electrònica) ; Rurali, Riccardo (Institut de Ciència de Materials de Barcelona) ; Abadal Berini, Gabriel (Universitat Autònoma de Barcelona. Departament d'Enginyeria Electrònica) ; American Institute of Physics
A micro-electro-mechanical system based vibration energy harvester is studied exploring the benefits of bistable non linear dynamics in terms of energy conversion. An electrostatic based approach to achieve bistability, which consists in the repulsive interaction between two electrets locally charged in both tip free ends of an atomic force microscope cantilever and a counter electrode, is experimentally demonstrated. [...]
2013 - 10.1063/1.4800926
Applied physics letters, Vol. 102, Issue 15 (April 2013) , p. 153901/1-153901/4  
31.
16 p, 838.2 KB Evolution and economic significance of listwaenites associated with Neoproterozoic ophiolites in south Eastern Desert, Egypt / Azer, M.K. (National Research Centre (El Caire, Egipte). Geological Sciences Department)
Most South Eastern Desert ophiolites are found along the Allaqi-Heiani-Gerf suture along the Egypt-Sudan border. Serpentinites, altered slices of upper mantle, are the main components of this suture and other sutures in the Arabian-Nubian Shield. [...]
2013 - 10.1344/105.000001777
Geologica acta, Vol. 11, Núm. 1 (març 2013) , p. 113-128  

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