Oxides for new-generation electronics

New Sensitive and Selective Chemical Sensors for Ni2+ and Cu2+ Ions: Insights into the Sensing Mechanism through DFT Methods

Título : New Sensitive and Selective Chemical Sensors for Ni2+ and Cu2+ Ions: Insights into the Sensing Mechanism through DFT Methods
Autores: Manuel A. Treto-Suárez, Jorge Tapia, Yoan Hidalgo-Rosa, Dayan Páez-Hernández, Elies Molins, Ximena Zarate*, and Eduardo Schott*
Citation:
J. Phys. Chem. A 2020, 124, 32, 6493–6503
Publication Date:July 8, 2020
DOI: https://doi.org/10.1021/acs.jpca.0c03834
PlumX: New Sensitive and Selective Chemical Sensors for Ni2+ and Cu2+ Ions: Insights into the Sensing Mechanism through DFT Methods
We report the synthesis and theoretical study of two new colorimetric chemosensors with special selectivity and sensitivity to Ni2+ and Cu2+ ions over other metal cations in the CH3CN/H2O solution. Compounds (E)-4-((2-nitrophenyl)diazenyl)-N,N-bis(pyridin-2-ylmethyl)aniline (A) and (E)-4-((3-nitrophenyl)diazenyl)-N,N-bis(pyridin-2-ylmethyl)aniline (B) exhibited a drastic color change from yellow to colorless, which allows the detection of the mentioned metal cations through different techniques.

Oxides

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Silicon nanowires as acetone-adsorptive media for diabetes diagnosis

Autores: Francisco De Santiago, José Eduardo Santana, Álvaro Miranda, Luis Antonio Pérez, Riccardo Rurali, Miguel Cruz-Irissona
Citation: Applied Surface Science, Volume 547, 2021, 149175, ISSN 0169-4332,
https://doi.org/10.1016/j.apsusc.2021.149175
PlumX: Silicon nanowires as acetone-adsorptive media for diabetes diagnosis
Early detection of diabetes, a worldwide health issue, is key for its successful treatment. Acetone is a marker of diabetes, and efficient, non-invasive detection can be achieved with the use of nanotechnology. In this paper we investigate the effect of acetone adsorption on the electronic properties of silicon nanowires (SiNWs) by means of density functional theory.

Oxides

  • Hits: 222

Soft‐Chemistry‐Assisted On‐Chip Integration of Nanostructured α‐Quartz Microelectromechanical System

Título : Soft‐Chemistry‐Assisted On‐Chip Integration of Nanostructured α‐Quartz Microelectromechanical System
Autores: Claire Jolly, Andres Gomez, David Sánchez‐Fuentes, Dilek Cakiroglu, Raïssa Rathar, Nicolas Maurin, Ricardo Garcia‐Bermejo, Benoit Charlot, Martí Gich, Michael Bahriz, Laura Picas, Adrian Carretero‐Genevrier
Citation: Adv. Mater. Technol. 2021, 2000831
DOI: https://doi.org/10.1002/admt.202000831
PlumX: Soft‐Chemistry‐Assisted On‐Chip Integration of Nanostructured α‐Quartz Microelectromechanical System
The development of advanced piezoelectric α‐quartz microelectromechanical system (MEMS) for sensing and precise frequency control applications requires the nanostructuration and on‐chip integration of this material on silicon material.

Cover, Oxides

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Critical Effect of Bottom Electrode on Ferroelectricity of Epitaxial Hf0.5Zr0.5O2 Thin Films

Título : Critical Effect of Bottom Electrode on Ferroelectricity of Epitaxial Hf0.5Zr0.5O2 Thin Films
Autores: Saúl Estandía, Jaume Gazquez, Maria Varela, N. Dix, Mengdi Qian, Raul Solanas, Ignasi Fina and Florencio Sanchez
Citation:

J. Mater. Chem. C, 9, 3486 - 3492 (2021)
DOI: https://doi.org/10.1039/D0TC05853J

 

PlumX: Critical Effect of Bottom Electrode on Ferroelectricity of Epitaxial Hf0.5Zr0.5O2 Thin Films
Epitaxial orthorhombic Hf0.5Zr0.5O2 (HZO) films on La0.67Sr0.33MnO3 (LSMO) electrodes show robust ferroelectricity, with high polarization, endurance and retention. However, no similar results have been achieved using other perovskite electrodes so far. Here, LSMO and other perovskite electrodes are compared.

Oxides

  • Hits: 216

Metallic Diluted Dimerization in VO2 Tweeds

Título : Metallic Diluted Dimerization in VO2 Tweeds
Autores: Felip Sandiumenge, Laura Rodríguez, Miguel Pruneda, César Magén, José Santiso, Gustau Catalan
Citation: Adv. Mater. 2021, 2004374
DOI: https://doi.org/10.1002/adma.202004374
PlumX: Metallic Diluted Dimerization in VO2 Tweeds
Though first order transitions are thought to be abrupt, materials find cunning ways to smooth the jump. Here we show that VO2 chooses making beautiful tapestries at the atomic scale. To see how, and how they affect its intriguing metal-insulator transition, continue reading:

Oxides

  • Hits: 226

Facile Chemical Route to Prepare Water Soluble Epitaxial Sr3Al2O6 Sacrificial Layers for Free‐Standing Oxides

Título : Facile Chemical Route to Prepare Water Soluble Epitaxial Sr3Al2O6 Sacrificial Layers for Free‐Standing Oxides
Autores: Pol Salles, Ivan Caño, Roger Guzman, Camilla Dore, Agustín Mihi, Wu Zhou, Mariona Coll
Citation: Adv. Mater. Interfaces 2021, 2001643. 
DOI: https://doi.org/10.1002/admi.202001643
PlumX: Facile Chemical Route to Prepare Water Soluble Epitaxial Sr3Al2O6 Sacrificial Layers for Free‐Standing Oxides
The growth of epitaxial complex oxides has been essentially limited to specific substrates that can induce epitaxial growth and stand high temperature thermal treatments. These restrictions hinder the opportunity to manipulate and integrate such materials into new artificial heterostructures including the use of polymeric and silicon substrates and study emergent phenomena for novel applications.

Oxides

  • Hits: 308

Non-volatile optical switch of resistance in photoferroelectric tunnel junctions

Autores: Xiao Long, Huan Tan, Florencio Sánchez, Ignasi Fina & Josep Fontcuberta
Citation: Nat Commun 12, 382 (2021).
https://doi.org/10.1038/s41467-020-20660-9
PlumX: Non-volatile optical switch of resistance in photoferroelectric tunnel junctions
In the quest for energy efficient and fast memory elements, optically controlled ferroelectric memories are promising candidates. Here, we show that, by taking advantage of the imprint electric field existing in the nanometric BaTiO3 films and their photovoltaic response at visible light, the polarization of suitably written domains can be reversed under illumination. We exploit this effect to trigger and measure the associate change of resistance in tunnel devices.

Oxides

  • Hits: 288

Rapid Thermal Annealing of Double Perovskite Thin Films Formed by Polymer Assisted Deposition

Título : Rapid Thermal Annealing of Double Perovskite Thin Films Formed by Polymer Assisted Deposition
Autores: Hailin Wang, Carlos Frontera, Benjamín Martínez * and Narcís Mestres *
Citation: Materials 202013(21), 4966
DOI: https://doi.org/10.3390/ma13214966
PlumX: Rapid Thermal Annealing of Double Perovskite Thin Films Formed by Polymer Assisted Deposition

The annealing process is an important step common to epitaxial films prepared by chemical solution deposition methods. It is so because the final microstructure of the films can be severely affected by the precise features of the thermal processing. In this work we analyze the structural and magnetic properties of double perovskite La2CoMnO6 and La2NiMnO6 epitaxial thin films prepared by polymer-assisted deposition (PAD) and crystallized by rapid thermal annealing (RTA).

Oxides

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Local electric-field control of multiferroic spin-spiral domains in TbMnO3

Título : Local electric-field control of multiferroic spin-spiral domains in TbMnO3
Autores: Peggy Schoenherr, Sebastian Manz, Lukas Kuerten, Konstantin Shapovalov, Ayato Iyama, Tsuyoshi Kimura, Manfred Fiebig & Dennis Meier
Citation:

npj Quantum Mater. 5, 86 (2020)
DOI: https://doi.org/10.1038/s41535-020-00289-z

PlumX: Metallacarboranes as Photoredox Catalysts in Water

Spin-spiral multiferroics exhibit a magnetoelectric coupling effects, leading to the formation of hybrid domains with inseparably entangled ferroelectric and antiferromagnetic order parameters. Due to this strong magnetoelectric coupling, conceptually advanced ways for controlling antiferromagnetism become possible and it has been reported that electric fields and laser pulses can reversibly switch the antiferromagnetic order.

Oxides

  • Hits: 354

Thermal evolution of ferroelectric behavior in epitaxial Hf0.5Zr0.5O2

Título : Thermal evolution of ferroelectric behavior in epitaxial Hf0.5Zr0.5O2
Autores: J. W. Adkins, I. Fina, F. Sánchez, S. R. Bakaul, and J. T. Abiade
Citation:

Appl. Phys. Lett. 117, 142902 (2020)
DOI: https://doi.org/10.1063/5.0015547

PlumX: Thermal evolution of ferroelectric behavior in epitaxial Hf0.5Zr0.5O2
Herein, we report a cryogenic-temperature study on the evolution of the ferroelectric properties of epitaxial Hf0.5Zr0.5O2 thin films on silicon. Wake-up, endurance, and fatigue of these films are found to be intricately correlated, strongly hysteretic, and dependent on available thermal energy.

Oxides

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Engineering Polar Oxynitrides: Hexagonal Perovskite BaWON2

Título : Engineering Polar Oxynitrides: Hexagonal Perovskite BaWON2
Autores: Dr. Judith Oró‐Solé, Dr. Ignasi Fina, Dr. Carlos Frontera, Dr. Jaume Gàzquez, Dr. Clemens Ritter, Marina Cunquero, Dr. Pablo Loza‐Alvarez, Dr. Sergio Conejeros, Prof. Pere Alemany, Prof. Enric Canadell, Prof. Josep Fontcuberta, Prof. Amparo Fuertes. 
Citation: Angew. Chem. Int. Ed. 2020, 59, 18395 – 18399.
DOI: https://doi.org/10.1002/ange.202006519
PlumX: Engineering Polar Oxynitrides: Hexagonal Perovskite BaWON2

Non‐centrosymmetric polar compounds have important technological properties. Reported perovskite oxynitrides show centrosymmetric structures, and for some of them high permittivities have been observed and ascribed to local dipoles induced by partial order of nitride and oxide.

Oxides

  • Hits: 547

Mechanical Softness of Ferroelectric 180° Domain Walls

Autores: Christina Stefani, Louis Ponet, Konstantin Shapovalov, Peng Chen, Eric Langenberg, Darrell G. Schlom, Sergey Artyukhin, Massimiliano Stengel, Neus Domingo, and Gustau Catalan.
Citation: Phys. Rev. X 10, 041001 – Published 1 October 2020
DOI:https://doi.org/10.1103/PhysRevX.10.041001
PlumX: Mechanical Softness of Ferroelectric 180° Domain Walls

Using scanning probe microscopy, we measure the out-of-plane mechanical response of ferroelectric 180° domain walls and observe that, despite separating domains that are mechanically identical, the walls appear mechanically distinct—softer—compared to the domains.

Oxides

  • Hits: 441

Discovery of highly polarizable semiconductors BaZrS3 and Ba3Zr2S7

Título : Discovery of highly polarizable semiconductors BaZr S3 and Ba3 Zr2 S7
Autores: Stephen Filippone, Boyang Zhao, Shanyuan Niu, Nathan Z. Koocher, Daniel Silevitch, Ignasi Fina, James M. Rondinelli, Jayakanth Ravichandran, and R. Jaramillo.
Citation: Phys. Rev. Materials 4, 091601(R) – Published 8 September 2020. 
DOI: https://doi.org/10.1103/PhysRevMaterials.4.091601
PlumX: Discovery of highly polarizable semiconductors BaZrS3 and Ba3Zr2S7

There are few known semiconductors exhibiting both strong optical response and large dielectric polarizability. Inorganic materials with large dielectric polarizability tend to be wide-band gap complex oxides. Semiconductors with a strong photoresponse to visible and infrared light tend to be weakly polarizable. Interesting exceptions to these trends are halide perovskites and phase-change chalcogenides.

Oxides

  • Hits: 521

Magnetic droplet solitons

Autores: Ferran Macià, and Andrew D. Kent.
Citation: Journal of Applied Physics 
https://doi.org/10.1063/5.0018251
PlumX: Magnetic droplet solitons

Magnetic droplet solitons are dynamical magnetic textures that form due to an attractive interaction between spin waves in thin films with perpendicular magnetic anisotropy. Spin currents and the spin torques associated with these currents enable their formation as they provide a means to excite non-equilibrium spin-wave populations and compensate their decay.

Oxides

  • Hits: 497

Epitaxial Ferroelectric La-doped Hf0.5Zr0.5O2 Thin Films

Título : Epitaxial Ferroelectric La-Doped Hf0.5Zr0.5O2 Thin Films
Autores: Tingfeng Song, Romain Bachelet, Guillaume Saint-Girons, Raul Solanas, Ignasi Fina, and Florencio Sanchez
Citation: ACS Appl. Electron. Mater. 2020
Publication DateSeptember 14, 2020
https://doi.org/10.1021/acsaelm.0c00560
PlumX: Epitaxial Ferroelectric La-doped Hf0.5Zr0.5O2 Thin Films

Doping ferroelectric Hf0.5Zr0.5O2 with La is a promising route to improve endurance. However, the beneficial effect of La on the endurance of polycrystalline films may be accompanied by degradation of the retention. We have investigated the endurance - retention dilemma in La-doped epitaxial films.

Oxides

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Conductivity control via minimally invasive anti-Frenkel defects in a functional oxide

Autores: Donald M. Evans, Theodor S. Holstad, Aleksander B. Mosberg, Didrik R. Småbråten, Per Erik Vullum, Anup L. Dadlani, Konstantin Shapovalov, Zewu Yan, Edith Bourret, David Gao, Jaakko Akola, Jan Torgersen, Antonius T. J. van Helvoort, Sverre M. Selbach & Dennis Meier.
Citation: Nat. Mater. (2020)
https://doi.org/10.1038/s41563-020-0765-x
PlumX: Conductivity control via minimally invasive anti-Frenkel defects in a functional oxide

Utilizing quantum effects in complex oxides, such as magnetism, multiferroicity and superconductivity, requires atomic-level control of the material’s structure and composition. In contrast, the continuous conductivity changes that enable artificial oxide-based synapses and multiconfigurational devices are driven by redox reactions and domain reconfigurations, which entail long-range ionic migration and changes in stoichiometry or structure.

Oxides

  • Hits: 880

On the Promotion of Catalytic Reactions by Surface Acoustic Waves

Surface acoustic waves (SAW) allow to manipulate surfaces with potential applications in catalysis, sensor and nanotechnology. SAWs were shown to cause a strong increase in catalytic activity and selectivity in many oxidation and decomposition reactions on metallic and oxidic catalysts.

Oxides

  • Hits: 397

Fatigue and retention in the growth window of ferroelectric Hf0.5Zr0.5O2 thin films

Título : Fatigue and retention in the growth window of ferroelectric Hf0.5Zr0.5O2 thin films
Autores: Jike Lyu, Ignasi Fina, and Florencio Sánchez. 
Appl. Phys. Lett. 117, 072901 (2020)
DOI: 10.1063/5.0017738
The growth window of epitaxial Hf0.5Zr0.5O2 is established taking into account the main ferroelectric properties that films have to present simultaneously: high remanent polarization, low fatigue, and long retention.

Oxides

  • Hits: 533

Visualization of moiré superlattices

Moiré superlattices in van der Waals heterostructures have given rise to a number of emergent electronic phenomena due to the interplay between atomic structure and electron correlations. Indeed, electrons in these structures have been recently found to exhibit a number of emergent properties that the individual layers themselves do not exhibit.

Oxides

  • Hits: 482

Siesta: Recent developments and applications

A review of the present status, recent enhancements, and applicability of the Siesta program is presented. Since its debut in the mid-1990s, Siesta’s flexibility, efficiency, and free distribution have given advanced materials simulation capabilities to many groups worldwide.

Oxides

  • Hits: 642

Flexible Antiferromagnetic FeRh Tapes as Memory Elements

Ignasi Fina*, Nico Dix, Enric Menéndez, Enric Menéndez, Anna Crespi, Michael Foerster, Lucia Aballe, Florencio Sánchez, Josep Fontcuberta*. ACS Appl. Mater. Interfaces 2020, XXXX, XXX, XXX-XXX. Publication Date:March 9, 2020

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