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1.
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8 p, 1.7 MB |
Tunable Molecular Electrodes for Bistable Polarization Screening
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Spasojevic, Irena (Universitat Autònoma de Barcelona. Departament de Química) ;
Santiso, José (Institut Català de Nanociència i Nanotecnologia) ;
Caicedo Roque, Jose Manuel (Institut Català de Nanociència i Nanotecnologia) ;
Catalan, Gustau (Institut Català de Nanociència i Nanotecnologia) ;
Domingo Marimon, Neus (Institut Català de Nanociència i Nanotecnologia)
The polar discontinuity at any ferroelectric surface creates a depolarizing field that must be screened for the polarization to be stable. In capacitors, screening is done by the electrodes, while in bare ferroelectric surfaces it is typically accomplished by atmospheric adsorbates. [...]
2023 -  10.1002/smll.202207799
Small, Vol. 19, Issue 30 (July 2023) , art. 2207799
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2.
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28 p, 1.2 MB |
Electrocatalytic tuning of biosensing response through electrostatic or hydrophobic enzyme-graphene oxide interactions
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Baptista Pires, Luis Miguel (Institut Català de Nanociència i Nanotecnologia) ;
Pérez-López, Briza (Leitat Technological Center (Terrassa)) ;
Mayorga-Martinez, Carmen C. (Institut Català de Nanociència i Nanotecnologia) ;
Morales-Narváez, Eden (Institut Català de Nanociència i Nanotecnologia) ;
Domingo Marimon, Neus (Institut Català de Nanociència i Nanotecnologia) ;
Esplandiu Egido, Maria José (Institut Català de Nanociència i Nanotecnologia) ;
Alzina, Francesc (Institut Català de Nanociència i Nanotecnologia) ;
Sotomayor Torres, Clivia M. (Institut Català de Nanociència i Nanotecnologia) ;
Merkoçi, Arben (Institut Català de Nanociència i Nanotecnologia)
The effect of graphene oxidative grades upon the conductivity and hydrophobicity and consequently the influence on an enzymatic biosensing response is presented. The electrochemical responses of reduced graphene oxide (rGO) have been compared with the responses obtained from the oxide form (oGO) and their performances have been accordingly discussed with various evidences obtained by optical techniques. [...]
2014 - 10.1016/j.bios.2014.05.028
Biosensors & bioelectronics, Vol. 61 (Nov. 2014) , p. 655-662
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3.
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29 p, 1.5 MB |
Deconvolution of Phonon Scattering by Ferroelectric Domain Walls and Point Defects in a PbTiO3Thin Film Deposited in a Composition-Spread Geometry
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Bugallo, David (Universidade de Santiago de Compostela. Departamento de Química Física) ;
Langenberg, Eric (Universitat de Barcelona. Institut de Nanociència i Nanotecnologia) ;
Ferreiro-Vila, Elias (Centro Singular de Investigacion en Quimica Bioloxica e Materiais Moleculares (CiQUS)) ;
Smith, Eva H. (Cornell University. Department of Materials Science and Engineering) ;
Stefani, Christina (Institut Català de Nanociència i Nanotecnologia) ;
Batlle, Xavier (Universitat de Barcelona. Departament de Física de la Matèria Condensada) ;
Catalan, Gustau (Institut Català de Nanociència i Nanotecnologia) ;
Domingo Marimon, Neus (Institut Català de Nanociència i Nanotecnologia) ;
Schlom, Darrell G. (Kavli Institute at Cornell for Nanoscale Science) ;
Rivadulla, Francisco (Universidade de Santiago de Compostela. Departamento de Química Física)
We present a detailed analysis of the temperature dependence of the thermal conductivity of a ferroelectric PbTiO3 thin film deposited in a composition-spread geometry enabling a continuous range of compositions from ∼25% titanium deficient to ∼20% titanium rich to be studied. [...]
2021 - 10.1021/acsami.1c08758
ACS applied materials & interfaces, Vol. 13, Num. 38 (September 2021) , p. 45679-45685
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4.
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28 p, 2.1 MB |
Local Piezoelectric Behavior of Potassium Sodium Niobate Prepared by a Facile Synthesis via Water Soluble Precursors
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Senes, Nina (University of Sassari. Department of Chemistry and Pharmacy) ;
Iacomini, Antonio (University of Sassari. Department of Chemistry and Pharmacy) ;
Domingo Marimon, Neus (Institut Català de Nanociència i Nanotecnologia) ;
Enzo, Stefano (University of Sassari. Department of Chemistry and Pharmacy) ;
Mulas, Gabriele (University of Sassari. Department of Chemistry and Pharmacy) ;
Cuesta-Lopez, Santiago (University of Burgos) ;
Garroni, Sebastiano (University of Burgos)
Due to the ever-increasing restrictions connected to the use of toxic lead-based materials, the developing of lead-free piezoceramics has become one of the most urgent tasks. In this context, potassium sodium niobate materials (KNN) have attracted a lot of interest as promising candidates due to their excellent piezo properties. [...]
2018 - 10.1002/pssa.201700921
Physica Status Solidi (A) Applications and Materials Science, Vol. 215, Issue 16 (February 2018) , art. 1700921
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5.
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169 p, 9.1 MB |
Mechanical and electromechanical properties of ferroelectrics at the nanoscale studied by Atomic Force Microscopy
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Stefani, Christina ;
Domingo Marimon, Neus, dir. ;
Catalan, Gustau, dir. ;
Sort Viñas, Jordi, dir.
La microscòpia de força piezoresposta (PFM) és una eina poderosa per a la caracterització electromecànica de materials ferroelèctrics. En aquest mode de microscòpia de força atòmica (AFM), una tensió de corrent alterna externa excita la mostra i es mesura la seva resposta piezoelèctrica, proporcionant informació sobre la magnitud, l'orientació i el signe de la polarització ferroelèctrica. [...]
La microscopía de fuerza de respuesta piezoeléctrica (PFM) es una poderosa herramienta para la caracterización electromecánica de materiales ferroeléctricos. En este modo de microscopía de fuerza atómica (AFM), un voltaje de CA externo excita la muestra y se mide su respuesta piezoeléctrica, proporcionando información sobre la magnitud, la orientación y el signo de la polarización ferroeléctrica. [...]
Piezoresponse force microscopy (PFM) is a powerful tool for the electromechanical characterization of ferroelectric materials. In this atomic force microscopy (AFM) mode, an external ac voltage excites the sample and its piezoelectric response is measured, providing information about the magnitude, orientation and sign of ferroelectric polarization. [...]
2022
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6.
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204 p, 28.6 MB |
Interplay Between Ferroelectricity and Surface Chemistry in BaTiO3
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Spasojević, Irena ;
Domingo Marimon, Neus, dir. ;
Catalan, Gustau, dir. ;
García-Antón, Jordi, dir.
Els materials ferroelèctrics tenen una polarització elèctrica permanent que pot reorientar-se entre els estats d'equilibri si s'aplica un camp elèctric extern amb l'orientació i magnitud adequada. [...]
Los materiales ferroeléctricos tienen una polarización eléctrica permanente que puede reorientarse entre los estados de equilibrio si se aplica un campo eléctrico externo con la orientación y magnitud adecuada. [...]
Ferroelectric materials possess permanent electric polarization, which can be reoriented between possible equilibrium states by the application of external electric field of proper orientation and magnitude. [...]
2022
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7.
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9 p, 3.3 MB |
Oxidation processes at the surface of BaTiO3 thin films under environmental conditions
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Spasojevic, Irena (Universitat Autònoma de Barcelona. Departament de Química) ;
Sauthier, Guillaume (Institut Català de Nanociència i Nanotecnologia) ;
Caicedo Roque, Jose Manuel (Institut Català de Nanociència i Nanotecnologia) ;
Verdaguer Prats, Albert (Institut de Ciència de Materials de Barcelona) ;
Domingo Marimon, Neus (Institut Català de Nanociència i Nanotecnologia)
Dissociation and adsorption of water on ferroelectric oxide surfaces play important role in the processes of screening and switching dynamics of ferroelectric polarization, as well as in catalytic processes which can be additionally coupled with light, temperature or vibration stimuli. [...]
2021 - 10.1016/j.apsusc.2021.150288
Applied surface science, Vol. 565 (Nov. 2021) , art. 150288
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8.
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7 p, 4.6 MB |
Local and correlated studies of humidity-mediated ferroelectric thin film surface charge dynamics
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Gaponenko, Iaroslav (G.W. Woodruff School of Mechanical Engineering) ;
Musy, Loïc (University of Geneva. Department of Quantum Matter Physics) ;
Domingo Marimon, Neus (Institut Català de Nanociència i Nanotecnologia) ;
Stucki, Nicolas (University of Applied Sciences and Arts Western Switzerland) ;
Verdaguer Prats, Albert (Institut de Ciència de Materials de Barcelona) ;
Bassiri-Gharb, Nazarin (G.W. Woodruff School of Mechanical Engineering) ;
Paruch, Patrycja (University of Geneva. Department of Quantum Matter Physics)
Electrochemical phenomena in ferroelectrics are of particular interest for catalysis and sensing applications, with recent studies highlighting the combined role of the ferroelectric polarisation, applied surface voltage and overall switching history. [...]
2021 - 10.1038/s41524-021-00615-4
npj Computational Materials, Vol. 7 (2021) , art. 163
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9.
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13 p, 3.7 MB |
Voltage control of magnetism with magneto-ionic approaches : beyond voltage-driven oxygen ion migration
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de Rojas, Julius (Universitat Autònoma de Barcelona. Departament de Física) ;
Quintana Puebla, Alberto (Institut de Ciència de Materials de Barcelona) ;
Rius, Gemma (Institut de Microelectrònica de Barcelona) ;
Stefani, Christina (Institut Català de Nanociència i Nanotecnologia) ;
Domingo Marimon, Neus (Institut Català de Nanociència i Nanotecnologia) ;
Costa-Krämer, José L. (Consejo Superior de Investigaciones Científicas (Espanya).Instituto de Micro y Nanotecnología) ;
Menéndez Dalmau, Enric (Universitat Autònoma de Barcelona. Departament de Física) ;
Sort Viñas, Jordi (Universitat Autònoma de Barcelona. Departament de Física)
Magneto-ionics is an emerging field in materials science where voltage is used as an energy-efficient means to tune magnetic properties, such as magnetization, coercive field, or exchange bias, by voltage-driven ion transport. [...]
2022 - 10.1063/5.0079762
Applied physics letters, Vol. 120, issue 7 (Feb. 2022) , art. 70501
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10.
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9 p, 2.4 MB |
Effect of humidity on the writing speed and domain wall dynamics of ferroelectric domains
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Spasojevic, Irena (Universitat Autònoma de Barcelona. Departament de Química) ;
Verdaguer Prats, Albert (Institut de Ciència de Materials de Barcelona) ;
Catalan, Gustau (Institut Català de Nanociència i Nanotecnologia) ;
Domingo Marimon, Neus (Institut Català de Nanociència i Nanotecnologia)
The switching dynamics of ferroelectric polarization under electric fields depends on the availability of screening charges in order to stabilize the switched polarization. In ferroelectrics, thin films with exposed surfaces investigated by piezoresponse force microscopy (PFM), the main source of external screening charges is the atmosphere and the water neck, and therefore relative humidity (RH) plays a major role. [...]
2022 - 10.1002/aelm.202100650
Advanced Electronic Materials, Vol. 8, issue 6 (June 2022) , art. 2100650
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