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Khaldi O, Ferhi H, Larbi T, Jomni F, Ben Younes R. Dielectric response of high- κ hafnium oxide under finite electric field: nonlinearities from ab initio and experimental points of view. Phys Chem Chem Phys 2023; 25:22310-22318. [PMID: 37578192 DOI: 10.1039/d3cp01552a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/15/2023]
Abstract
Herein, we report on the dielectric-voltage nonlinearities under a constant electric field in metal insulator metal (MIM) capacitor-based hafnium oxide (HfO2) with respect to the frequency range. Via the Schottky emission mechanism obtained from the current-voltage characteristic (I-V), we calculated the optical dielectric constant εr,opt for different external DC bias values. The extracted εr,opt revealed a quadratic dependence on the applied external field. This confirmed that such dependence is a common feature of high-κ oxides in the low and high frequency ranges. The results were correlated with the ab initio calculations using the finite field (FF) method as implemented in the CRYSTAL 17 code. Good agreement between the results from the FF method, I-V plots, as well as the UV-visible spectrometry is observed. To assess any change in the dielectric constant upon the application of an external electric field, several parameters such as exchange-correlation functional, basis sets (BSs), as well as supercell expansion factor (N) were tested. The corresponding parameters have a great influence on the macroscopic electron density and voltage along the field direction and thus on the optical response. For N > 2 and rich basis sets, the hybrid functional B3LYP revealed good agreement with the experimental results as compared to other Hamiltonian's forms such as LDA, PW-GGA and HF.
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Affiliation(s)
- Othmen Khaldi
- University of Tunis El Manar, Laboratory of Materials, Organization and Properties, LMOP(LR99ES17), 2092, Tunis, Tunisia.
| | - Hanen Ferhi
- University of Gafsa, Laboratory of Technology, Energy and Innovative Materials, Department of Physics, Faculty of Sciences of Gafsa, 2112, Gafsa, Tunisia
| | - Tarek Larbi
- University of Tunis El Manar, Laboratory of Nanomaterials, Nanotechnology and Energy, 2092, Tunis, Tunisia
| | - Fethi Jomni
- University of Tunis El Manar, Laboratory of Materials, Organization and Properties, LMOP(LR99ES17), 2092, Tunis, Tunisia.
| | - Rached Ben Younes
- University of Gafsa, Laboratory of Technology, Energy and Innovative Materials, Department of Physics, Faculty of Sciences of Gafsa, 2112, Gafsa, Tunisia
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Conti Nibali V, Maiti S, Saija F, Heyden M, Cassone G. Electric-field induced entropic effects in liquid water. J Chem Phys 2023; 158:2889002. [PMID: 37154276 DOI: 10.1063/5.0139460] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2022] [Accepted: 03/13/2023] [Indexed: 05/10/2023] Open
Abstract
Externally applied electric fields in liquid water can induce a plethora of effects with wide implications in electrochemistry and hydrogen-based technologies. Although some effort has been made to elucidate the thermodynamics associated with the application of electric fields in aqueous systems, to the best of our knowledge, field-induced effects on the total and local entropy of bulk water have never been presented so far. Here, we report on classical TIP4P/2005 and ab initio molecular dynamics simulations measuring entropic contributions carried by diverse field intensities in liquid water at room temperature. We find that strong fields are capable of aligning large fractions of molecular dipoles. Nevertheless, the order-maker action of the field leads to quite modest entropy reductions in classical simulations. Albeit more significant variations are recorded during first-principles simulations, the associated entropy modifications are small compared to the entropy change involved in the freezing phenomenon, even at intense fields slightly beneath the molecular dissociation threshold. This finding further corroborates the idea that electrofreezing (i.e., the electric-field-induced crystallization) cannot take place in bulk water at room temperature. In addition, here, we propose a molecular-dynamics-based analysis (3D-2PT) that spatially resolves the local entropy and the number density of bulk water under an electric field, which enables us to map their field-induced changes in the environment of reference H2O molecules. By returning detailed spatial maps of the local order, the proposed approach is capable of establishing a link between entropic and structural modifications with atomistic resolution.
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Affiliation(s)
- Valeria Conti Nibali
- Department of Mathematical and Computer Sciences, Physical Sciences and Earth Sciences, University of Messina, 98166 Messina, Italy
- Institute for Chemical-Physical Processes, National Research Council of Italy (IPCF-CNR), 98158 Messina, Italy
| | - Sthitadhi Maiti
- School of Molecular Sciences, Arizona State University, Tempe, Arizona 85287, USA
| | - Franz Saija
- Institute for Chemical-Physical Processes, National Research Council of Italy (IPCF-CNR), 98158 Messina, Italy
| | - Matthias Heyden
- School of Molecular Sciences, Arizona State University, Tempe, Arizona 85287, USA
| | - Giuseppe Cassone
- Institute for Chemical-Physical Processes, National Research Council of Italy (IPCF-CNR), 98158 Messina, Italy
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Kalita S, Bergman H, Dubey KD, Shaik S. How Can Static and Oscillating Electric Fields Serve in Decomposing Alzheimer's and Other Senile Plaques? J Am Chem Soc 2023; 145:3543-3553. [PMID: 36735972 PMCID: PMC9936589 DOI: 10.1021/jacs.2c12305] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Alzheimer's disease is one of the most common neurodegenerative conditions, which are ascribed to extracellular accumulation of β-amyloid peptides into plaques. This phenomenon seems to typify other related neurodegenerative diseases. The present study uses classical molecular-dynamics simulations to decipher the aggregation-disintegration behavior of β-amyloid peptide plaques in the presence of static and oscillating oriented external electric fields (OEEFs). A long-term disintegration of such plaques is highly desirable since this may improve the prospects of therapeutic treatments of Alzheimer's disease and of other neurodegenerative diseases typified by senile plaques. Our study illustrates the spontaneous aggregation of the β-amyloid, its prevention and breakdown when OEEF is applied, and the fate of the broken aggregate when the OEEF is removed. Notably, we demonstrate that the usage of an oscillating OEEF on β-amyloid aggregates appears to lead to an irreversible disintegration. Insight is provided into the root causes of the various modes of aggregation, as well as into the different fates of OEEF-induced disintegration in oscillating vs static fields. Finally, our simulation results are compared to the well-established TTFields and the Deep Brain Stimulation (DBS) therapies, which are currently used options for treatments of Alzheimer's disease and other related neurodegenerative diseases.
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Affiliation(s)
- Surajit Kalita
- Institute of Chemistry, The Hebrew University of Jerusalem, Edmond J. Safra Campus, Givat Ram, Jerusalem 9190401, Israel
| | - Hagai Bergman
- Department of Medical Neurobiology (Physiology), The Hebrew University of Jerusalem, Hadassah Medical Faculty, Jerusalem, Israel 91120
| | - Kshatresh Dutta Dubey
- Department of Chemistry, School of Natural Sciences, Shiv Nadar Institution of Eminence, Greater Noida, Uttar Pradesh 201314, India
| | - Sason Shaik
- Institute of Chemistry, The Hebrew University of Jerusalem, Edmond J. Safra Campus, Givat Ram, Jerusalem 9190401, Israel
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Du P, Yuan H, Tan D, Yang R. Identification of biomolecule-based electronic materials from a first-principles study of aliphatic amino acids. Phys Chem Chem Phys 2023; 25:5520-5528. [PMID: 36723358 DOI: 10.1039/d2cp05333k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Biomolecule-based electronic materials can enable health innovations by virtue of their intrinsic bioactivity and physical properties. However, the ultra-wide bandgap and limited piezoelectric properties of most biomaterials prevent them from reaching their full potential. Herein, the electronic structures and electromechanical properties of aliphatic amino acid crystals are investigated based on density functional theory. L-Met is found to be a wide bandgap p-type semiconductor, and the much-reduced bandgap of 2.88 eV is ascribed to the sulphur atoms in L-Met. L-Leu has a shear piezoelectric voltage constant of 2.706 V mN-1 that is over an order of magnitude higher than that of lead zirconate titanate, and good toughness and ductility are also revealed in L-Leu from mechanical property investigations. This study illustrates a computational approach to find smart and multifunctional biomaterials and inspire their growth and applications.
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Affiliation(s)
- Pei Du
- School of Advanced Materials and Nanotechnology, Academy of Advanced Interdisciplinary Research, Xidian University, Xi'an 710126, China.
| | - Hui Yuan
- School of Advanced Materials and Nanotechnology, Academy of Advanced Interdisciplinary Research, Xidian University, Xi'an 710126, China. .,Department of Molecular Microbiology and Biotechnology, The Shmunis School of Biomedicine and Cancer Research, Tel Aviv University, Tel Aviv 6997801, Israel
| | - Dan Tan
- School of Advanced Materials and Nanotechnology, Academy of Advanced Interdisciplinary Research, Xidian University, Xi'an 710126, China.
| | - Rusen Yang
- School of Advanced Materials and Nanotechnology, Academy of Advanced Interdisciplinary Research, Xidian University, Xi'an 710126, China.
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Bhateja Y, Ghosh R, Sponer J, Majumdar S, Cassone G. A Cr 2O 3-doped graphene sensor for early diagnosis of liver cirrhosis: a first-principles study. Phys Chem Chem Phys 2022; 24:21372-21380. [PMID: 36043859 DOI: 10.1039/d2cp01793h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Liver cirrhosis is among the leading causes of death worldwide. Because of its asymptomatic evolution, timely diagnosis of liver cirrhosis via non-invasive techniques is currently under investigation. Among the diagnostic methods employing volatile organic compounds directly detectable from breath, sensing of limonene (C10H16) represents one of the most promising strategies for diagnosing alcohol liver diseases, including cirrhosis. In the present work, by means of state-of-the-art Density Functional Theory calculations including the U correction, we present an investigation on the sensing capabilities of a chromium-oxide-doped graphene (i.e., Cr2O3-graphene) structure toward limonene detection. In contrast with other structures such as g-triazobenzol (g-C6N6) monolayers and germanane, which revealed their usefulness in detecting limonene via physisorption, the proposed Cr2O3-graphene heterostructure is capable of undergoing chemisorption upon molecular approaching of limonene over its surface. In fact, a high adsorption energy is recorded (∼-1.6 eV). Besides, a positive Moss-Burstein effect is observed upon adsorption of limomene on the Cr2O3-graphene heterostructure, resulting in a net increase of the bandgap (∼50%), along with a sizeable shift of the Fermi level toward the conduction band. These findings pave the way toward the experimental validation of such predictions and the employment of Cr2O3-graphene heterostructures as sensors of key liver cirrhosis biomarkers.
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Affiliation(s)
- Yuvam Bhateja
- Dept. of Physics, Politecnico Di Milano, Piazza Leonardo da Vinci, 32, 20133 Milano, Italy.
| | - Ritam Ghosh
- Nil Ratan Sircar Medical College and Hospital, Raja Bazar 138, 700014 Kolkata, India
| | - Jiri Sponer
- Institute of Biophysics of the Czech Academy of Sciences, Královopolská 135, 61265 Brno, Czechia
| | - Sanhita Majumdar
- Center of Excellence for Green Energy and Sensor Systems, Indian Institute of Engineering Science and Technology, Shibpur, Botanical Garden Road, 711103 Howrah, India.
| | - Giuseppe Cassone
- Institute for Chemical-Physical Processes, National Research Council of Italy, Viale F. Stagno d'Alcontres 37, 98158 Messina, Italy.
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Zhang Z, Liu S, Pan Q, Hong Y, Shan Y, Peng Z, Xu X, Liu B, Chai Y, Yang Z. Van der Waals Exfoliation Processed Biopiezoelectric Submucosa Ultrathin Films. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2022; 34:e2200864. [PMID: 35470922 DOI: 10.1002/adma.202200864] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2022] [Revised: 04/10/2022] [Indexed: 06/14/2023]
Abstract
Piezoelectric biomaterials have attracted significant attention due to the potential effect of piezoelectricity on biological tissues and their versatile applications. However, the high cost and complexity of assembling and domain aligning biomolecules at a large scale, and the disordered arrangement of piezoelectric domains as well as the lack of ferroelectricity in natural biological tissues remain a roadblock toward practical applications. Here, utilizing the weak van der Waals interaction in the layered structure of small intestinal submucosa (SIS), a van der Waals exfoliation (vdWE) process is reported to fabricate ultrathin films down to the thickness of the effective piezoelectric domain. Based on that, the piezoelectric property is revealed of SIS stemming from the collagen fibril, with piezoelectric coefficients up to 4.1 pm V-1 and in-plane polarization orientation parallel to the fibril axis. Furthermore, a biosensor based on the vdWE-processed SIS film with an in-plane electrode is demonstrated that produces open-circuit voltages of ≈250 mV under the cantilever vibration condition. The vdWE method shows great potential in facilely fabricating ultrathin films of soft tissues and biosensors.
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Affiliation(s)
- Zhuomin Zhang
- Department of Mechanical Engineering, City University of Hong Kong, Hong Kong, 999077, China
| | - Shiyuan Liu
- Department of Mechanical Engineering, City University of Hong Kong, Hong Kong, 999077, China
| | - Qiqi Pan
- Department of Mechanical Engineering, City University of Hong Kong, Hong Kong, 999077, China
| | - Ying Hong
- Department of Mechanical Engineering, City University of Hong Kong, Hong Kong, 999077, China
| | - Yao Shan
- Department of Mechanical Engineering, City University of Hong Kong, Hong Kong, 999077, China
| | - Zehua Peng
- Department of Mechanical Engineering, City University of Hong Kong, Hong Kong, 999077, China
| | - Xiaote Xu
- Department of Mechanical Engineering, City University of Hong Kong, Hong Kong, 999077, China
| | - Bingren Liu
- Department of Mechanical Engineering, City University of Hong Kong, Hong Kong, 999077, China
| | - Yu Chai
- Department of Physics, City University of Hong Kong, Hong Kong, 999077, China
| | - Zhengbao Yang
- Department of Mechanical Engineering, City University of Hong Kong, Hong Kong, 999077, China
- City University of Hong Kong Shenzhen Research Institute, Shenzhen, 518057, China
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Cassone G, Sponer J, Saija F. Ab Initio Molecular Dynamics Studies of the Electric-Field-Induced Catalytic Effects on Liquids. Top Catal 2021. [DOI: 10.1007/s11244-021-01487-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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8
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Electric Field and Temperature Effects on the Ab Initio Spectroscopy of Liquid Methanol. APPLIED SCIENCES-BASEL 2021. [DOI: 10.3390/app11125457] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Although many H-bonded systems have been extensively investigated by means of infrared (IR) spectroscopy, the vibrational response to externally applied electric fields of polar liquids remains poorly investigated. However, local electric fields along with quantum-mechanical interactions rule the behavior of H-bonded samples at the molecular level. Among the many H-bonded systems, liquid methanol holds a key place in that it exhibits a very simple H-bond network where, on average, each molecule acts as a single H-bond donor and, at the same time, as a single H-bond acceptor. Here we report on the IR spectra emerging from a series of state-of-the-art ab initio molecular dynamics simulations of bulk liquid methanol under the action of static and homogeneous electric fields. In addition, the same analysis is here conducted in the absence of the external field and for different temperatures. Although some electric-field-induced effects resemble the response of other polar liquids (such as the global contraction of the IR spectrum upon field exposure), it turns out that, distinctly from water, the “electrofreezing” phenomenon is unlikely to happen in liquid methanol. Finally, we provide atomistic analyses magnifying the completely different nature of electric-field- and temperature-induced effects on bulk liquid methanol and on its vibrational response.
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