Article
Materials Science, Ceramics
O. Rosales-Gonzalez, F. Pedro-Garcia, F. Sanchez-De Jesus, A. Barba-Pingarron, M. Ramirez-Cardona, A. M. Bolarin-Miro
Summary: The dielectric study of yttrium orthoferrite YFeO3 revealed temperature-frequency dependence of dielectric relaxation processes. The material exhibited orthorhombic crystal structure and weak ferromagnetic behavior. Two relaxation processes at different temperature ranges were identified, with activation energies corresponding to single and doubly ionized oxygen vacancies. The dominant conduction mechanism was found to follow the Jonscher power law, indicating a hopping model in the material.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Ceramics
Zelai Cheng, Lin Gan, Yuan Liu, Juan Jiang, Tianjin Zhang
Summary: This study investigates the impact of SV addition on the microstructure, dielectric properties, sintering process, and defects behavior of microwave dielectric ceramics. It confirms the formation of SrTiO3 and glass phase, which leads to a decrease in sintering temperature. The variation in dielectric properties follows empirical mixture rules, with a near-zero tau(f) value obtained. The defects behavior, including oxygen vacancies and Ti3+ and V4+ dopants, is characterized, with a higher dielectric loss observed in the SV-added ceramics. Finally, a 0.7Li(2)Zn(3)Ti(4)O(12)-0.3Sr(3)(VO4)(2) ceramic exhibits excellent microwave dielectric properties and compatibility with silver electrode, showing potential applications in low-temperature co-fired ceramics (LTCC).
CERAMICS INTERNATIONAL
(2022)
Article
Engineering, Biomedical
Simone R. de Rijk, Alexander J. Boys, Iwan V. Roberts, Chen Jiang, Charlotte Garcia, Roisin M. Owens, Manohar Bance
Summary: Cochlear implants are revolutionary devices that partially restore hearing for those with severe sensorineural hearing loss. However, they can lead to fibrotic tissue formation in the cochlea, causing residual hearing loss and suboptimal outcomes. This study develops a tissue-engineered model to examine the electrical characteristics associated with fibrotic tissue formation.
ADVANCED HEALTHCARE MATERIALS
(2023)
Article
Chemistry, Physical
Till Ortmann, Till Fuchs, Janis K. Eckhardt, Ziming Ding, Qianli Ma, Frank Tietz, Christian Kuebel, Marcus Rohnke, Juergen Janek
Summary: The deposition of dense and uniform sodium layers at the Cu|Na3.4Zr2Si2.4P0.6O12 interface in anode-free solid-state batteries is systematically studied. It is found that the coverage is relatively uniform at a current density of approximately 1 mA·cm-2 and is not significantly affected by stack pressure. In situ transmission electron microscopy reveals oriented growth of sodium during the early stages of metal deposition.
ADVANCED ENERGY MATERIALS
(2023)
Article
Materials Science, Ceramics
S. A. Mazen, A. S. Nawara, N. Abu-Elsaad
Summary: The electrical characteristics of Mn/Co/Cu-substituted Ni-Zn ferrites prepared using the citrate technique were studied in detail by ac impedance spectroscopy. The results showed a significant improvement in dielectric properties and the Ni-Zn-Cu ferrite series displayed the best dielectric performance, suggesting its suitability for high-frequency devices.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Multidisciplinary
Bhoomika Yadav, Kamal K. Kar, Manas K. Ghorai, Devendra Kumar, Dharmendra Yadav
Summary: In this study, the effect of extrinsic and intrinsic point defects on the conductivity and dielectric behavior of CCTO synthesized using the molten salt method was investigated. It was found that extrinsic defects migration caused dielectric loss at low temperatures, while long-range conduction due to intrinsic defects accumulation resulted in higher losses at high temperatures. By doping Mg into CCTO, the loss was reduced and an almost temperature-independent dielectric constant was achieved.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Chemistry, Multidisciplinary
Youkyoung Oh, Seung Won Lee, Jeong-Hun Choi, Seung-Eon Ahn, Hyo-Bae Kim, Ji-Hoon Ahn
Summary: This study investigated the effects of Y-doping cycles on the ferroelectric and electrical properties of Y-HZO thin films fabricated through ALD. The results showed that Y doping improved the ferroelectric properties without the need for post-thermal treatment. Moreover, the optimized doping cycle induced a phase transformation, further enhancing the ferroelectric properties of Y-HZO thin films.
Article
Biophysics
Shohanuzzaman Shohan, Yingyan Zeng, Xiaoyu Chen, Ran Jin, Rohan Shirwaiker
Summary: In this study, a soft-sensing approach using non-destructive dielectric spectroscopy (DS) and predictive analytics was investigated for estimating the quality profiles of tissue engineered medical products (TEMP). The DS method showed better performance than traditional biochemical assays in assessing key scalar metrics of GelMA constructs. To minimize cytotoxicity risk, a bilinear basis mixed model (BBMM) was developed to estimate missing permittivity profiles based on measured DS data and biofabrication parameters. Results showed that the BBMM outperforms existing methods in estimating missing data.
BIOSENSORS & BIOELECTRONICS
(2022)
Article
Chemistry, Physical
Jakkree Boonlakhorn, Narong Chanlek, Jedsada Manyam, Pornjuk Srepusharawoot, Prasit Thongbai
Summary: The dielectric permittivity of CaCu3Ti4O12 was enhanced by doping with Mg at the Cu site, and further enhanced by codoping with Ge at the Ti site. The enhancement was attributed to the increased ratio of grain size to grain boundary thickness and increased free charge inside semiconducting grains. The double-step reduction in the low-frequency loss tangent was due to the enhanced resistance of the insulating grain boundaries from the segregation of the Cu-rich phase.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Review
Chemistry, Applied
Masoud Hamidi, Oseweuba Valentine Okoro, Peiman Brouki Milan, Mohammad Reza Khalili, Hadi Samadian, Lei Nie, Amin Shavandi
Summary: Fungal exopolysaccharides have diverse potential applications in various industries. However, there are only a few commercialized products based on fungal EPSs in the biomedical field. This review critically discusses the potential biomedical applications of fungal EPSs in tissue engineering, drug and gene delivery.
CARBOHYDRATE POLYMERS
(2022)
Article
Chemistry, Physical
Hicham Mahfoz Kotb, Hassan A. Khater, Osama Saber, Mohamad M. Ahmad
Summary: NSCTO ceramics were prepared by reactive sintering solid-state reaction, and the influence of sintering temperature on structural and dielectric properties was thoroughly studied. The ceramic sample sintered at 1025 degrees C showed the best compromise between colossal relative permittivity and low dielectric loss values.
Article
Physics, Applied
Kang Yuan, Rui Ma, Li Yang, Yang Yang, Jiaming Sun
Summary: In this study, Ga2O3/TiO2 nanolaminate films were fabricated to improve the electrical injection and stability of Al2O3:Er MOSLEDs. The optimal GTO nanolaminate demonstrated high tolerance to electric field, resulting in enhanced electroluminescence performance and excitation efficiency. The design principle of the dielectric nanolaminates provides a promising route for the application of oxide-based optoelectronic devices.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Article
Materials Science, Ceramics
Jakkree Boonlakhorn, Jirata Prachamon, Jedsada Manyam, Prasit Thongbai, Pornjuk Srepusharawoot
Summary: The structural and electrical parameters of CaCu2.90Ni0.10Ti4-xGexO12 ceramics were studied using solid-state reaction approach, revealing the significant improvement in dielectric permittivity and low loss tangents with the addition of Ge4+ ions, mainly due to an internal barrier layer capacitor effect.
CERAMICS INTERNATIONAL
(2021)
Article
Nanoscience & Nanotechnology
Suresh Thapa, Sydney R. Provence, Patrick T. Gemperline, Bethany E. Matthews, Steven R. Spurgeon, Sydney L. Battles, Steve M. Heald, Marcelo A. Kuroda, Ryan B. Comes
Summary: 4d transition metal oxides, such as SrNbO3, show promise for various applications including high mobility electronics. However, the synthesis of SrNbO3 is challenging due to the metastable nature of the Nb4+ cation and limitations in delivering refractory Nb. In this study, SrNbO3 thin films were successfully grown using hybrid molecular beam epitaxy (MBE) with a Sr source and a tris(diethylamido)(tert-butylimido) niobium precursor. Insulating SrHfO3 capping layers were deposited on top of the SrNbO3 films to preserve the metastable surface. The results demonstrate that the SrHfO3 capping plays a crucial role in preserving the crystalline quality and metastable charge state of Nb4+ under atmospheric conditions.
Article
Nanoscience & Nanotechnology
Felix Hilpert, Pei-Chun Liao, Evanie Franz, Vanessa M. Koch, Lukas Fromm, Ece Topraksal, Andreas Goerling, Ana-Suncana Smith, Maissa K. S. Barr, Julien Bachmann, Olaf Brummel, Joerg Libuda
Summary: Solution-based atomic layer deposition (sALD) enables the preparation of thin films on nanostructured surfaces with precise control of film thickness and homogeneity. In this study, a sALD process was developed to deposit CuSCN films on a Si substrate using CuOAc and LiSCN precursors. The film growth behavior was characterized using AFM, NN analysis, ellipsometry, and in situ IR spectroscopy combined with DFT calculations. The results showed that CuSCN films grew as three-dimensional spherical nanoparticles on a pre-formed 2D layer, with increasing particle density and size as the cycle number increased. The film mainly consisted of the beta- CuSCN phase, along with a small fraction of the alpha-CuSCN phase and defect sites.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Clinical Neurology
Alexander Perdomo-Pantoja, Feras Shamoun, Christina Holmes, Wataru Ishida, Seba Ramhmdani, Ethan Cottrill, Ali Bydon, Sheng-fu L. Lo, Nicholas Theodore, Timothy F. Witham
Article
Orthopedics
Wataru Ishida, Alexander Perdomo-Pantoja, Benjamin D. Elder, John Locke, Christina Holmes, Timothy F. Witham, Sheng-Fu L. Lo
JOURNAL OF BONE AND JOINT SURGERY-AMERICAN VOLUME
(2019)
Review
Medicine, General & Internal
Katie Morgan, Wesam Gamal, Kay Samuel, Steven D. Morley, Peter C. Hayes, Pierre Bagnaninchi, John N. Plevris
JOURNAL OF CLINICAL MEDICINE
(2020)
Article
Orthopedics
Christina Holmes, Benjamin D. Elder, Wataru Ishida, Alexander Perdomo-Pantoja, John Locke, Ethan Cottrill, Sheng-Fu L. Lo, Timothy F. Witham
JOURNAL OF ORTHOPAEDIC SURGERY AND RESEARCH
(2020)
Article
Materials Science, Multidisciplinary
Ryoma Ogawa, Amelia Hallas-Potts, Hancong Wu, Jiabin Jia, Pierre O. Bagnaninchi
Summary: This study demonstrates a method combining 3D cell culture and impedance imaging technology to simultaneously perform 3D impedance imaging and viability measurements. Utilizing low-resistance 3D printed scaffolds, real-time monitoring of large-scale 3D cell cultures is achieved, paving the way for quantitative, non-invasive evaluation of tissue engineering products.
ADVANCED ENGINEERING MATERIALS
(2021)
Review
Gastroenterology & Hepatology
Jose C. Fernandez-Checa, Pierre Bagnaninchi, Hui Ye, Pau Sancho-Bru, Juan M. Falcon-Perez, Felix Royo, Carmen Garcia-Ruiz, Ozlen Konu, Joana Miranda, Oleg Lunov, Alexandr Dejneka, Alistair Elfick, Alison McDonald, Gareth J. Sullivan, Guruprasad P. Aithal, M. Isabel Lucena, Raul J. Andrade, Bernard Fromenty, Michel Kranendonk, Francisco Javier Cubero, Leonard J. Nelson
Summary: DILI is a major cause of ALF and a leading indication for liver transplantation in Western societies. Lack of concordance between human and animal DILI and absence of models that faithfully recapitulate human DILI pathophysiological features have hindered our understanding and predictive capabilities of DILI.
JOURNAL OF HEPATOLOGY
(2021)
Article
Computer Science, Interdisciplinary Applications
Zhe Liu, Pierre Bagnaninchi, Yunjie Yang
Summary: This paper presents an impedance-optical dual-modal imaging framework for high-quality 3D cell culture imaging and other tissue engineering applications. The framework includes a dual-modal sensor, a guidance image processing algorithm, and a deep learning model for information fusion. The proposed method significantly improves image quality and has the potential to reveal both structural and functional information of tissue-level targets simultaneously.
IEEE TRANSACTIONS ON MEDICAL IMAGING
(2022)
Article
Biochemistry & Molecular Biology
Jiwon Park, Siyang Jia, Donald Salter, Pierre Bagnaninchi, Carsten G. Hansen
Summary: In this study, the cellular response to hydrostatic pressure was investigated using quantitative label-free digital holographic imaging. It was found that cells respond to elevated hydrostatic pressure by rapidly changing their volume, which is regulated by the co-transcriptional regulators YAP and TAZ of the Hippo signaling pathway. Additionally, YAP/TAZ activation induced transcription and expression of cellular components involved in regulating cell volume and extracellular matrix.
Article
Engineering, Electrical & Electronic
Zhe Liu, Renjie Zhao, Graham Anderson, Pierre-Olivier Bagnaninchi, Yunjie Yang
Summary: This article proposes an enhanced deep neural network, En-MSFCF-Net, for automatically improving the mask image obtained from an auxiliary imaging modality and conducting information fusion and image reconstruction. Compared with the original MSFCF-Net, En-MSFCF-Net demonstrates a more accurate conductivity estimation, as well as superior shape preservation and conductivity prediction accuracy. Both qualitative and quantitative results indicate that En-MSFCF-Net can make dual-modal imaging more robust in real-world situations.
IEEE SENSORS JOURNAL
(2023)
Article
Engineering, Biomedical
Zhe Liu, Hengjia Gu, Zhou Chen, Pierre Bagnaninchi, Yunjie Yang
Summary: This paper proposes a segmentation-free dual-modal EIT image reconstruction algorithm based on Overlapping Group Lasso and Laplacian regularization. The algorithm utilizes structural images obtained from an auxiliary imaging modality to construct an overlapping group lasso penalty based on conductivity change properties. Laplacian regularization is introduced to alleviate artifacts caused by group overlapping. Experimental results demonstrate the superiority of the proposed method in terms of structure preservation, background artifact suppression, and conductivity contrast differentiation.
IEEE TRANSACTIONS ON BIOMEDICAL ENGINEERING
(2023)
Article
Computer Science, Artificial Intelligence
Zhou Chen, Jinxi Xiang, Pierre-Olivier Bagnaninchi, Yunjie Yang
Summary: This article presents a learning algorithm called MMV-Net based on a multiple measurement vector (MMV) model to solve the mfEIT image reconstruction problem. MMV-Net considers the correlations between mfEIT images and uses a cascade of a Spatial Self-Attention module and a ConvLSTM module to capture intrafrequency and interfrequency dependencies. The experimental results demonstrate that MMV-Net outperforms traditional methods and state-of-the-art deep learning methods in terms of image quality, convergence performance, noise robustness, and computational efficiency.
IEEE TRANSACTIONS ON NEURAL NETWORKS AND LEARNING SYSTEMS
(2023)
Article
Computer Science, Artificial Intelligence
Zhenlei Chen, Qing Guo, Tieshan Li, Yao Yan, Dan Jiang
Summary: A deep-Gaussian-process (DGP)-based method for operator's gait prediction is proposed to estimate real-time motion intention and compensate for the measurement delay. A variable admittance controller is designed based on the quantified gait prediction uncertainties, and an extend-state observer (ESO) is used to compensate unmeasured system state, model uncertainties, and unmodeled dynamics.
IEEE TRANSACTIONS ON NEURAL NETWORKS AND LEARNING SYSTEMS
(2023)
Article
Engineering, Electrical & Electronic
Zhou Chen, Yunjie Yang, Pierre-Olivier Bagnaninchi
Summary: This study proposes a hybrid algorithm based on deep learning and group sparsity regularization for cell imaging using mEIT. By combining deep neural networks with CS regularization, the method achieves superior performance and generalization ability in image reconstruction.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2021)
Proceedings Paper
Engineering, Biomedical
Jonathan H. Mason, Yvonne Reinwald, Ying Yang, Sarah Waters, Alicia El Haj, Pierre O. Bagnaninchi
THREE-DIMENSIONAL AND MULTIDIMENSIONAL MICROSCOPY: IMAGE ACQUISITION AND PROCESSING XXVI
(2019)
Proceedings Paper
Engineering, Biomedical
Jonathan H. Mason, Yvonne Reinwald, Ying Yang, Sarah Waters, Alicia El Haj, Pierre O. Bagnaninchi
OPTICAL ELASTOGRAPHY AND TISSUE BIOMECHANICS VI
(2019)
