Article
Chemistry, Inorganic & Nuclear
Jie Wu, Gaochao Zhao, Wei Dong, Chengbing Pan, Kun Tao, Wenjuan Huang, Peng Tong, Jie Yang, Xuebin Zhu, Lihua Yin, Wenhai Song, Yuping Sun
Summary: This study systematically investigates the effects of quenching on the structural, electrical, dielectric, ferroelectric, and piezoelectric properties of ceramics. Optimal piezoelectricity and FE Curie temperature are achieved through optimized quenching rate and temperature. The quenching effect on piezoelectricity is particularly significant for samples near morphotropic phase boundaries, which can be attributed to changes in phase ratio and domain structure/defect dipole orientation caused by quenching. Additionally, a new poling method, cooling the sample at a constant dc current across FE TC, is established to improve the piezoelectricity.
INORGANIC CHEMISTRY
(2022)
Article
Chemistry, Physical
Guofu Chen, Wenlong Bao, Jiao Chen, Zhaoliang Wang
Summary: This paper studies the thermal rectification phenomenon in graphene supported by a heterogeneous substrate and investigates the influence of heat source temperature and size on the thermal rectification rate. The results show that the heat flux is more easily transferred from the graphene covered on the SiO2 side.
Article
Physics, Condensed Matter
Vivek Prajapati, Nivedita Deo
Summary: This paper investigates the transport properties of mass-less and spin-less Dirac fermions in a substrate-induced graphene super-lattice. The study shows that by adjusting the structural parameters, the Dirac fermions can reflect and transmit between different valleys, leading to a unique behavior in the conductance.
PHYSICA B-CONDENSED MATTER
(2023)
Article
Multidisciplinary Sciences
Zainab Gholami, Farhad Khoeini
Summary: The study investigated the spin-dependent transport properties in hybrid graphene/silicene nanoribbons and found that a pure thermal spin current can be obtained by modulating the temperature, while a negative differential thermoelectric resistance was observed.
SCIENTIFIC REPORTS
(2021)
Article
Materials Science, Multidisciplinary
Anna N. Morozovska, Riccardo Hertel, Salia Cherifi-Hertel, Victor Yu. Reshetnyak, Eugene A. Eliseev, Dean R. Evans
Summary: Polar chiral structures have attracted significant interest recently for their potential in innovative device concepts. This study focuses on ferroelectric nanoparticles and introduces the flexon polarization configuration, showing its potential flexibility and the critical influence of flexoelectric coupling. The findings suggest similarities with chiral structures in magnetism and highlight the importance of the flexoelectric effect in stabilizing chiral states.
Article
Polymer Science
Xin Chen, Hancheng Qin, Wenyi Zhu, Bing Zhang, Wenchang Lu, J. Bernholc, Q. M. Zhang
Summary: Recently, it was discovered that converting chlorofluoroethylene (CFE) into fluorinated alkyne (FA) in P(VDF-TrFE-CFE) polymeric materials can result in P(VDF-TrFE-CFE-FA) tetrapolymers with exceptional electromechanical response at ultralow electric fields. This effect is attributed to the conversion of bulky CFE into small-size FA defects, which weakens the relaxor behavior and allows for a diffused critical endpoint transition region. The near 2 mol % FA content in the tetrapolymers enables a small change in the electric field to induce a large electroactuation, presenting new opportunities for novel applications.
Article
Chemistry, Multidisciplinary
Chen-Bo-Wen Li, Hao-Cheng Thong, Yi-Xuan Liu, Ke Bi, Zhengqian Fu, Ke Wang
Summary: This study systematically investigates the hardening effect in ferroelectric materials and reveals its association with the nanoscale domain reconfiguration and the ferroelectric-paraelectric phase transition temperature. It offers new insights into improving the performance of high-power piezoelectric applications.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Physical
Hui Sun, Zirou Xu, Xi Xie, Jiaying Niu, Minggui Wang, Xiuyun Zhang, Xiaobing Chen, Jie Han
Summary: Combining ferroelectric/piezoelectric catalysts with photocatalysts improves the separation of photoinduced electrons and holes, enhancing synergistic catalytic activities. Ag2O decoration on BiTO nanoflowers boosts light absorption and photocatalytic activity, with ultrasonic excitation maintaining the built-in electric field effectively for improved performance. Poled 20%Ag2O/BiTO exhibits the best photocatalytic performance, with influences from ultrasonic frequency and electric poling.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Minggui Wang, Wei Zheng, Zhili Tao, Lijin Zhang, Haoxue Luan, Xiaohuan Sun, Jie Han
Summary: In this study, SBTO/SnS2 hybrids were synthesized by decorating SnS2 nanostructures on SBTO nanosheets, significantly enhancing the light absorption capability, photocatalytic activity, and stability of the hybrids. The introduced periodic magnetic stirring helps resolve the electrostatic screening of ferroelectric, promoting the separation of electrons and holes, and further improving the photocatalytic activity.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Rajarshi Roy, David Necas, Lenka Zajickova
Summary: This study demonstrates controlled formation of graphene nanobubbles on transferred graphene on standard SiO2/Si substrate by applying an external electric field. The dimensional attributes of nanobubbles can be manipulated by varying tip voltage and distance. Moreover, significant out-of-plane piezo-response was observed in the newly created nanobubbles, with a quadratic dependence of the effective piezoelectric coefficient on the increasing bubble creation ramp voltage.
Article
Multidisciplinary Sciences
Xin Chen, Hancheng Qin, Xiaoshi Qian, Wenyi Zhu, Bo Li, Bing Zhang, Wenchang Lu, Ruipeng Li, Shihai Zhang, Lei Zhu, Fabrice Domingues Dos Santos, J. Bernholc, Q. M. Zhang
Summary: Introducing a small amount of fluorinated alkyne monomers enhances the polarization change in ferroelectric polymers, leading to a strong electromechanical coupling effect.
Article
Chemistry, Multidisciplinary
Xiao-Ying Zhang, Jing Han, Duan-Chen Peng, Yu-Jiao Ruan, Wan-Yu Wu, Dong-Sing Wuu, Chien-Jung Huang, Shui-Yang Lien, Wen-Zhang Zhu
Summary: In this study, HfO2 thin films were prepared on silicon using plasma enhanced atomic layer deposition (PEALD) and the effects of substrate temperature on their structure, morphology, and electrical properties were investigated.
Article
Chemistry, Multidisciplinary
Peter Finkel, Markys G. Cain, Thomas Mion, Margo Staruch, Jakub Kolacz, Sukriti Mantri, Chad Newkirk, Kyril Kavetsky, John Thornton, Junhai Xia, Marc Currie, Thomas Hase, Alex Moser, Paul Thompson, Christopher A. Lucas, Andy Fitch, Julie M. Cairney, Scott D. Moss, Alan Gareth Alexander Nisbet, John E. Daniels, Samuel E. Lofland
Summary: In this study, the switching of ferroelectric domains in domain-engineered crystals was controlled by electrical field and mechanical stress, resulting in the transformation from an opaque polydomain structure to a transparent monodomain state. This manipulation achieved both a large piezoelectric effect and high optical transmissivity.
ADVANCED MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Zhe Wang, Jinyan Zhao, Gang Niu, Wei Ren, Nan Zhang, Kun Zheng, Yi Quan, Lingyan Wang, Jian Zhuang, Henghui Cai, Xin Li, Genshui Wang, Ming Liu, Zhuangde Jiang, Yulong Zhao
Summary: Lead-free bismuth sodium titanite (Bi0.5Na0.5)TiO3-based piezoelectric thin films, specifically (1 - x)(Bi0.5Na0.5)TiO3-xBaZrO(3) (x = 0.02, 0.04, 0.06 and 0.07, BNT-100xBZ) were successfully fabricated using the sol-gel method. The influence of the BZ contents on the dielectric and piezoelectric properties of the thin films was investigated. The results showed that the BNT-4BZ thin films exhibited a giant macro-scale strain value and a relatively lower dielectric loss, along with a coexistence of ferroelectric phase and relaxor characteristics. These findings are of great significance for improving the strain response and reducing the dielectric loss in lead-free thin films for various piezoelectric device applications.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
Article
Physics, Applied
Xin Gong, Guannan Li, Hua Lin, Zengjie Zhou, Jianfeng Tang, Yuming Lu
Summary: In this study, high-quality xBFO-(1-x)BTO ceramics were successfully synthesized using the microwave sintering method, and they exhibited excellent ferroelectric properties, including a large remnant polarization. The results indicate that microwave synthesis is an effective approach for preparing high-performance BFO-BTO ceramics.
APPLIED PHYSICS LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Thi Ngoc Lam Tran, Anna Szczurek, Stefano Varas, Cristina Armellini, Francesco Scotognella, Alessandro Chiasera, Maurizio Ferrari, Giancarlo C. Righini, Anna Lukowiak
Summary: Flexible photonics is a promising technological platform that can revolutionize light-based technologies. The advent of ultrathin glasses has opened up new possibilities for developing all-inorganic flexible photonic structures and devices. However, the deposition and processing of functional coatings on such thin glasses pose challenges in terms of adhesion and maintaining mechanical flexibility. This study reports progress in obtaining rare-earth activated SnO2 photoluminescent thin films on ultrathin glass, which can be valuable for the development of flexible inorganic systems. The results demonstrate the potential of sol-gel derived synthesis and fabrication protocols for achieving high-quality coatings on ultrathin glasses.
Review
Chemistry, Physical
Thi Ngoc Lam Tran, Alessandro Chiasera, Anna Lukowiak, Maurizio Ferrari
Summary: The unique spectroscopic properties of Eu3+ ion make it a powerful tool in various high-tech application areas, such as biology, structural engineering, environmental monitoring systems, and quantum technology. By utilizing the photoluminescent properties of Eu3+ ions, researchers can understand complex dynamical processes and develop materials with specific characteristics. Eu3+ optical spectroscopy is also utilized in probing local structures, studying dynamical processes, and developing rare-earth-based platforms for quantum technologies.
Article
Physics, Applied
Anna N. Morozovska, Eugene A. Eliseev, Kyle Kelley, Sergei V. Kalinin
Summary: The combination of local heating and biasing in temperature-assisted piezosponse force microscopy (TPFM) provides a pathway for probing temperature-induced phase transitions and polarization dynamics in ferroic materials. The study analyzes the signal formation mechanism in TPFM and investigates the interplay between thermal and bias-induced switching. The research results are significant for the quantitative interpretation of TPFM observations and the exploration of thermopolarization effects in various materials.
PHYSICAL REVIEW APPLIED
(2022)
Article
Physics, Applied
Anna N. Morozovska, Hanna Shevliakova, Yaroslava Yu Lopatina, Mykola E. Yelisieiev, Galina Dovbeshko, Marina Olenchuk, George S. Svechnikov, Sergei Kalinin, Yunseok Kim, Eugene A. Eliseev
Summary: This article proposes a flexible method to reconstruct the local density of states (LDOS) of low-dimensional transition-metal dichalcogenides (LDTMD) by measuring the local current-voltage characteristics. The reconstruction of LDOS allows for a better understanding of the local band structure of LDTMDs in a relatively wide energy range.
PHYSICAL REVIEW APPLIED
(2022)
Article
Materials Science, Multidisciplinary
Anna N. Morozovska, Sergei V. Kalinin, Mykola E. Yelisieiev, Jonghee Yang, Mahshid Ahmadi, Eugene A. Eliseev, Dean R. Evans
Summary: This research explores the polar states of uniaxial ferroelectric nanoparticles interacting with the surface system of electronic and ionic charges, taking into account the broad distribution of mobilities. The results show that nonlinear interactions between the ferroelectric dipoles and surface charges give rise to a wide range of paraelectric-like, antiferroelectric-like ionic, and ferroelectric-like ferroionic states. The transition between these states can be controlled by the static characteristics and relaxation dynamics of the surface charges. The obtained results are not only promising for advanced applications of ferroelectric nanoparticles in nanoelectronics and optoelectronics but also provide strategies for experimental verification.
Article
Materials Science, Multidisciplinary
Anna N. Morozovska, Eugene A. Eliseev, Yulian M. Vysochanskii, Viktoria V. Khist, Dean R. Evans
Summary: Using the Landau-Ginzburg-Devonshire approach, the study investigates screening-induced phase transitions in core-shell ferroic nanoparticles of three different shapes: an oblate disk, a sphere, and a prolate needle. The results demonstrate that the screening length of the shell has a critical influence on the phase transitions and spontaneous polarization of the nanoparticle core. The tunable screening shell allows the control of the polar state and phase diagrams, which can be of great significance for nonvolatile memory cells.
PHYSICAL REVIEW MATERIALS
(2022)
Article
Chemistry, Physical
Marzena Fandzloch, Weronika Bodylska, Katarzyna Roszek, Damian Szymanski, Anna Jaromin, Anna Lukowiak
Summary: Four highly bioactive glasses were prepared in a binary SiO2-CaO system using Ca(OH)2 as a calcium precursor through a sol-gel method. The size and properties of the glass particles were evaluated, and it was found that new glasses with varying composition, porosity, and hydroxyl groups content greatly enhanced the formation of hydroxyapatite in simulated physiological fluids. These glasses exhibited superior apatite-mineralization ability in a short time and surpassed the bioactivity of known bioactive glasses. The safety and toxicity profile of the glasses were also verified, and two glasses of different sizes showed promising results.
PARTICLE & PARTICLE SYSTEMS CHARACTERIZATION
(2023)
Review
Chemistry, Physical
Giancarlo C. C. Righini, Cristina Armellini, Maurizio Ferrari, Alice Carlotto, Alessandro Carpentiero, Andrea Chiappini, Alessandro Chiasera, Anna Lukowiak, Thi Ngoc Lam Tran, Stefano Varas
Summary: In this review, the development of sol-gel glasses for photonics applications is overviewed, with a focus on the interesting results obtained by the authors and their collaborators. Silicate glasses with specific optical and spectroscopic properties are discussed, including their roles in luminescent systems, light-confining structures, and memristors. The effects of rare-earth doping, matrix composition, densification process, and fabrication protocol on the photonic systems are illustrated using appropriate examples. The achievements in fabricating sol-gel optical waveguides, microstructures, and nanostructures for light confinement are also briefly mentioned.
Article
Physics, Applied
Anna N. Morozovska, Eugene A. Eliseev, Mykola E. Yelisieiev, Yulian M. Vysochanskii, Dean R. Evans
Summary: Using the Landau-Ginzburg-Devonshire approach, the stress-induced transformations of polarization switching in CuInP2S6 nanoparticles of different shapes were studied. The semiconducting properties of the nanoparticles were modeled using a surface-charge layer with a small effective screening length due to the field effect. The results showed a strong and unusual influence of hydrostatic pressure on polarization switching, hysteresis loop shape, magnitude of remanent polarization, and coercive fields.
PHYSICAL REVIEW APPLIED
(2023)
Article
Chemistry, Multidisciplinary
Yongtao Liu, Anna N. Morozovska, Ayana Ghosh, Kyle P. Kelley, Eugene A. Eliseev, Jinyuan Yao, Ying Liu, Sergei Kalinin
Summary: In this study, the local curvature and strain effects on polarization in CIPS were investigated using piezoresponse force microscopy and spectroscopy. The finite element Landau-Ginzburg-Devonshire model was introduced to explain the observed behaviors and decouple the curvature and strain effects in 2D CIPS. The results showed that bending induced ferrielectric domains in CIPS and the polarization-voltage hysteresis loops differed in bending and nonbending regions. These studies provide important insights into the fabrication of curvature-engineered nanoelectronic devices.
Article
Chemistry, Physical
Kyle P. Kelley, Anna N. Morozovska, Eugene A. Eliseev, Yongtao Liu, Shelby S. Fields, Samantha T. Jaszewski, Takanori Mimura, Sebastian Calderon, Elizabeth C. Dickey, Jon F. Ihlefeld, Sergei V. Kalinin
Summary: Ferroelectricity in binary oxides such as hafnia and zirconia has attracted attention due to unconventional physical mechanisms and potential integration into semiconductor workflows. Recent research suggests that factors such as electrochemical boundary conditions and strain heavily influence the ferroelectric properties. The interplay between ferroelectric and structural instabilities, coupled with non-local screening, explains the emergence of these properties.
Article
Physics, Applied
Anna N. Morozovska, Maksym V. Strikha, Kyle P. Kelley, Sergei V. Kalinin, Eugene A. Eliseev
Summary: This study develops an effective model to describe the charge-polarization coupling behavior between a thin film and graphene, and explains the nonlinear relationship between Landau expansion coefficients and film thickness and chemical composition. The research finds that the polarization of the film strongly influences the conductivity of graphene, and the charge distribution in graphene can be controlled by manipulating the film's electric field dependence.
PHYSICAL REVIEW APPLIED
(2023)
Article
Materials Science, Multidisciplinary
Anna N. Morozovska, Eugene A. Eliseev, Venkatraman Gopalan, Long-Qing Chen
Summary: We propose an analytical Landau-Ginzburg (LG) theory that describes the charge density waves coupled with lattice and electronic long-range order parameters. The theory is applicable to various long-range order phenomena, such as superconducting Cooper pairs, structural distortions, electric polarization, and magnetization. We introduce a biquadratic coupling between the charge density gradient and the long-range order parameters, which plays a critical role in the appearance of spatially modulated phases in charge-ordered ferroics and high-temperature superconductors.
Article
Materials Science, Multidisciplinary
Anna N. Morozovska, Eugene A. Eliseev, Ayana Ghosh, Mykola E. Yelisieiev, Yulian M. Vysochanskii, Sergei V. Kalinin
Summary: In this study, the strain-induced polarization reversal in a ferroelectric CuInP2S6 (CIPS) thin film with conductive electrodes is explored. The study reveals an unusually strong effect of mismatch strain on the out-of-plane polarization reversal, hysteresis loop shape, dielectric susceptibility, and piezoelectric response of CIPS films.
Article
Chemistry, Multidisciplinary
Marzena Fandzloch, Weronika Bodylska, Katarzyna Roszek, Katarzyna Halubek-Gluchowska, Anna Jaromin, Yuriy Gerasymchuk, Anna Lukowiak
Summary: A highly bioactive mesoporous glass solvBG76 was successfully synthesized using a facile method. The material showed nano-size, non-spherical morphology, and a structure free of crystalline impurities, enhancing the deposition of hydroxyapatite (HA) when in contact with physiological fluids. Various analyses confirmed the formation of HA layer on the glass, and solvBG76 exhibited superior apatite-mineralization ability compared to other glasses. Moreover, it demonstrated biocompatibility and hemocompatibility.
