Doru C. Lupascu
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View article: Tailoring the topography, crystalline structure, and piezoelectric response of electrospun biodegradable poly(3-hydroxybutyrate) scaffolds by glycine loading
Tailoring the topography, crystalline structure, and piezoelectric response of electrospun biodegradable poly(3-hydroxybutyrate) scaffolds by glycine loading Open
Tissue engineering (TE) represents an interdisciplinary field introduced for the recovery, preservation, and improvement of tissue function. Piezopolymers make it possible to generate exogenous potentials close to endogenous ones to promot…
View article: Reward driven discovery of the optimal microstructure representations with invariant variational autoencoders
Reward driven discovery of the optimal microstructure representations with invariant variational autoencoders Open
Microscopy techniques generate vast amounts of complex image data that in principle can be used to discover simpler, interpretable, and parsimonious forms to reveal the underlying physical structures, such as elementary building blocks in …
View article: Improving Workability of Recycled Cement Pastes
Improving Workability of Recycled Cement Pastes Open
View article: Synthesis of Aziridinium Lead Iodide Hybrid Perovskite Thin Films
Synthesis of Aziridinium Lead Iodide Hybrid Perovskite Thin Films Open
Hybrid lead halide perovskites have significant attention as light‐absorbing materials for photovoltaic applications. Among them, aziridinium‐based halide perovskites remain relatively unexplored in the synthesis and characterization of az…
View article: Materials discovery in combinatorial and high-throughput synthesis and processing: A new Frontier for SPM
Materials discovery in combinatorial and high-throughput synthesis and processing: A new Frontier for SPM Open
For over three decades, scanning probe microscopy (SPM) has been a key method for exploring material structures and functionalities at nanometer and often atomic scales in ambient, liquid, and vacuum environments. Historically, SPM applica…
View article: Attention-Based Explainability for Structure-Property Relationships
Attention-Based Explainability for Structure-Property Relationships Open
Machine learning methods are emerging as a universal paradigm for constructing correlative structure-property relationships in materials science based on multimodal characterization. However, this necessitates development of methods for ph…
View article: Reentrant Phenomenon in Barium Titanate Zirconate‐Based Relaxor Ferroelectrics
Reentrant Phenomenon in Barium Titanate Zirconate‐Based Relaxor Ferroelectrics Open
Reentrant phenomena are rare occurrences in relaxor ferroelectrics, and their underlying mechanisms are still unknown. In this paper, we report on the reentrant relaxor behavior in the perovskite system (1 − x )Ba(Ti 0.85 Zr 0.15 )O 3 ‐ x …
View article: Polarization stability in lead-free Na0.5Bi0.5TiO3 ceramics: Grain size and temperature effects
Polarization stability in lead-free Na0.5Bi0.5TiO3 ceramics: Grain size and temperature effects Open
View article: Magnetoelectric Decoupling in Bismuth Ferrite
Magnetoelectric Decoupling in Bismuth Ferrite Open
It is still an open question if magnetoelectric coupling occurs at the atomic scale in multiferroic BiFeO3. Nuclear solid-state techniques monitor local fields at the atomic scale. Using such an approach, we show that, contrary to our own …
View article: Low-dimensional hybrid lead-free azetidinium metal halides
Low-dimensional hybrid lead-free azetidinium metal halides Open
Organic–inorganic hybrid halide perovskites have attracted attention in optoelectronics and photovoltaics. However, the Pb-content in the crystal structure and instability issues have raised questions about the industrialization of these m…
View article: Influence of additives on the fracture mechanical properties of reactivated cement paste
Influence of additives on the fracture mechanical properties of reactivated cement paste Open
View article: Stoichiometry of CoFe2O4 as a key to phase control and improved functional properties of multiferroic BaTiO3-CoFe2O4 bulk composites
Stoichiometry of CoFe2O4 as a key to phase control and improved functional properties of multiferroic BaTiO3-CoFe2O4 bulk composites Open
View article: Integrating Predictive and Generative Capabilities by Latent Space Design via the DKL-VAE Model
Integrating Predictive and Generative Capabilities by Latent Space Design via the DKL-VAE Model Open
We introduce a Deep Kernel Learning Variational Autoencoder (VAE-DKL) framework that integrates the generative power of a Variational Autoencoder (VAE) with the predictive nature of Deep Kernel Learning (DKL). The VAE learns a latent repre…
View article: Weakly‐coupled barium titanate stannate‐based relaxors as energy storage materials
Weakly‐coupled barium titanate stannate‐based relaxors as energy storage materials Open
Lead‐free relaxor ferroelectrics are promising materials for energy storage applications. To find new material systems for electrostatic capacitors, many researches have dedicated their work to formulate new ecologically safe compositions.…
View article: Polymer Composite Films with P(VDF-TrFE) and Molecular Ferroelectric Tris(hydroxymethyl) Nitromethane: Improvement of Their Ferroelectric Properties
Polymer Composite Films with P(VDF-TrFE) and Molecular Ferroelectric Tris(hydroxymethyl) Nitromethane: Improvement of Their Ferroelectric Properties Open
Polymer composites of P(VDF-TrFE) and Tris(hydroxymethyl) nitromethane as filler material with different concentrations have been prepared. Tris(hydroxymethyl) nitromethane is an organic ferroelectric material with low preparation cost and…
View article: Chemical transformations during the preparation and rehydration of reactivated virgin cements
Chemical transformations during the preparation and rehydration of reactivated virgin cements Open
This paper aims to provide a thorough comprehension of the chemical transformations occurring during the thermal preparation of reactivated virgin cements (RVCes). X-ray Diffraction (XRD) analysis of RVCes reveals the reformation of the di…
View article: Materials Discovery in Combinatorial and High-throughput Synthesis and Processing: A New Frontier for SPM
Materials Discovery in Combinatorial and High-throughput Synthesis and Processing: A New Frontier for SPM Open
For over three decades, scanning probe microscopy (SPM) has been a key method for exploring material structures and functionalities at nanometer and often atomic scales in ambient, liquid, and vacuum environments. Historically, SPM applica…
View article: Flash Sintering in Oxides: The Debye Temperature Is Not the Limit
Flash Sintering in Oxides: The Debye Temperature Is Not the Limit Open
View article: Measurements with noise: Bayesian optimization for co-optimizing noise and property discovery in automated experiments
Measurements with noise: Bayesian optimization for co-optimizing noise and property discovery in automated experiments Open
The proposed workflow integrates intra-step optimization into automated experiments, optimizing both the target property and measurement duration to enhance efficiency by balancing knowledge acquisition and experimental costs.
View article: Perovskite-inspired low-dimensional hybrid azetidinium bismuth halides: [(CH <sub>2</sub> ) <sub>3</sub> NH <sub>2</sub> ] <sub>3</sub> Bi <sub>2</sub> X <sub>9</sub> (X = I, Br, Cl)
Perovskite-inspired low-dimensional hybrid azetidinium bismuth halides: [(CH <sub>2</sub> ) <sub>3</sub> NH <sub>2</sub> ] <sub>3</sub> Bi <sub>2</sub> X <sub>9</sub> (X = I, Br, Cl) Open
Three new azetidinium bismuth halides were synthesized as next-generation light-absorbers.
View article: Polymer Composite Films with P(VDF-TrFE) and Molecular Ferroelectric Tri(hydroxymethyl) Nitromethane: Their Ferroelectric and Dielectric Properties
Polymer Composite Films with P(VDF-TrFE) and Molecular Ferroelectric Tri(hydroxymethyl) Nitromethane: Their Ferroelectric and Dielectric Properties Open
Polymer composites of P(VDF-TrFE) and Tri(hydroxymethyl) nitromethane as filler material with different concentrations have been prepared. Tri(hydroxymethyl) nitromethane is an organic ferroe-lectric material with low preparation cost, lig…
View article: Measurements with Noise: Bayesian Optimization for Co-optimizing Noise and Property Discovery in Automated Experiments
Measurements with Noise: Bayesian Optimization for Co-optimizing Noise and Property Discovery in Automated Experiments Open
We have developed a Bayesian optimization (BO) workflow that integrates intra-step noise optimization into automated experimental cycles. Traditional BO approaches in automated experiments focus on optimizing experimental trajectories but …
View article: Effect of Bi(Mg0.5Ti0.5)O3 addition on the dielectric and electrocaloric properties of relaxor (Na0.5Bi0.5)TiO3 - BaTiO3 ceramics
Effect of Bi(Mg0.5Ti0.5)O3 addition on the dielectric and electrocaloric properties of relaxor (Na0.5Bi0.5)TiO3 - BaTiO3 ceramics Open
The electrocaloric effect (ECE) refers to the isothermal entropy or adiabatic temperature change of polar crystals when an electric field is applied or removed. This effect is a promising approach for the development of compact solid state…
View article: Front Cover: Bi site doped Ferroelectric BiFe<sub>0.95</sub>Mn<sub>0.05</sub>O<sub>3</sub> Nanoparticles for Hydrogen Evolution Reaction (ChemCatChem 12/2024)
Front Cover: Bi site doped Ferroelectric BiFe<sub>0.95</sub>Mn<sub>0.05</sub>O<sub>3</sub> Nanoparticles for Hydrogen Evolution Reaction (ChemCatChem 12/2024) Open
The Front Cover graphic illustrates the process of hydrogen evolution during water splitting through electrocatalysis, highlighting the functionality of cationically engineered bismuth ferrite (BFO) nanoparticles (NPs). In their Research A…
View article: Magneto-electric decoupling in bismuth ferrite
Magneto-electric decoupling in bismuth ferrite Open
It is still under intensive discussion, how magnetoelectric coupling actually occurs at the atomic scale in multiferroic BiFeO3. Nuclear solid-state techniques monitor local fields at the atomic scale. Using such an approach, we show that,…
View article: High porosity hafnia ceramics by freeze casting
High porosity hafnia ceramics by freeze casting Open
Highly porous hafnia ceramics are prepared by freeze casting. The major challenge resides in the high density of the hafnia particles typically leading to settling in the slurry. To address this, we optimized the suspension formulation to …
View article: Fabrication and characterization of microporous soft templated photoactive 3D materials for water disinfection in batch and continuous flow
Fabrication and characterization of microporous soft templated photoactive 3D materials for water disinfection in batch and continuous flow Open
Water cleaning can be provided in batch mode or in continuous flow. For the latter, some kind of framework must withhold the cleaning agents from washout. Porous structures provide an ideal ratio of surface to volume for optimal access of …
View article: Chemical Transformations During the Preparation and Rehydration of Reactivated Virgin Cements
Chemical Transformations During the Preparation and Rehydration of Reactivated Virgin Cements Open
View article: Ferroelectric‐Photocatalysts for Degradation of Phthalate: Doped BiFeO<sub>3</sub>‐Graphene Oxide Nanocomposites
Ferroelectric‐Photocatalysts for Degradation of Phthalate: Doped BiFeO<sub>3</sub>‐Graphene Oxide Nanocomposites Open
A complete photocatalytic degradation of dibutyl phthalate (DBP) using ferroelectric doped‐bismuth ferrite‐ (BiFeO 3 ; BFO) graphene oxide (GO) nanocomposites is achieved. The local ferroelectric properties of doped BFO photocatalysts supp…
View article: Fracture toughness on compact tension specimen as a quality parameter for cement stone
Fracture toughness on compact tension specimen as a quality parameter for cement stone Open
A series of tests of compression strength and fracture toughness of hardened cement paste (cement stone) was carried out. The compression strength was tested on cubes with side lengths of 10, 20, 30 and 40 mm. Fracture toughness was measur…