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Jeong J, Kim J, Sun J, Min K. Machine-Learning-Driven High-Throughput Screening for High-Energy Density and Stable NASICON Cathodes. ACS Appl Mater Interfaces 2024. [PMID: 38693838 DOI: 10.1021/acsami.3c18448] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2024]
Abstract
The Na super ionic conductor (NASICON), which has outstanding structural stability and a high operating voltage, is an appealing material for overcoming the limits of low specific energy and larger volume distortion of sodium-ion batteries. In this study, to discover ideal NASICON cathode materials, a screening platform based on density functional theory (DFT) calculations and machine learning (ML) is developed. A training database was generated utilizing the previous 124 545 electrode databases, and a test set of 3126 potential NASICON structures [NaxMyM'1-y(PO4)3] with 27 dopants at the metal site and 6 dopants at the polyanion central site was constructed. The developed ML surrogate model identifies 796 materials that satisfy the following criteria: formation energy of <0.0 eV/atom, energy above hull of ≤0.025 eV/atom, volume change of ≤4%, and theoretical capacity of ≥50 mAh/g. The thermodynamically stable configurations of doped NASICON structures were then selected using machine learning interatomic potential (MLIP), enabling rapid consideration of various dopant site configurations. DFT calculations are followed on 796 screened materials to obtain energy density, average voltage, and volume change. Finally, 50 candidates with an average voltage of ≥3.5 V are identified. The suggested platform accelerates the exploration for optimal NASICON materials by narrowing the focus on materials with desired properties, saving considerable resources.
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Affiliation(s)
- Jinyoung Jeong
- School of Mechanical Engineering, Soongsil University, 369 Sangdo-ro, Dongjak-gu, Seoul 06978, Republic of Korea
| | - Juo Kim
- School of Mechanical Engineering, Soongsil University, 369 Sangdo-ro, Dongjak-gu, Seoul 06978, Republic of Korea
| | - Jiwon Sun
- School of Mechanical Engineering, Soongsil University, 369 Sangdo-ro, Dongjak-gu, Seoul 06978, Republic of Korea
| | - Kyoungmin Min
- School of Mechanical Engineering, Soongsil University, 369 Sangdo-ro, Dongjak-gu, Seoul 06978, Republic of Korea
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Cao L, Chen Q, Zhu Y, Tong K, Li W, Ma J, Jalali M, Huang Z, Wu J, Zhai Y. Interfacial Modulation of Spin-Orbit Torques Induced by Two-Dimensional van der Waals Material ZrSe 3. ACS Appl Mater Interfaces 2024; 16:19764-19770. [PMID: 38577833 DOI: 10.1021/acsami.4c00881] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/06/2024]
Abstract
Two-dimensional van der Waals (2D vdW) materials are widely used in spin-orbit torque (SOT) devices. Recent studies have demonstrated the low crystal symmetry and large spin Hall conductivity of 2D vdW ZrSe3, indicating its potential applications in low-power SOT devices. Here, we study the interfacial contribution of SOTs and current-induced magnetization switching in the ZrSe3/Py (Ni80Fe20) and ZrSe3/Cu/Py heterostructures. SOT efficiencies of samples are detected by the spin-torque ferromagnetic resonance (ST-FMR), and out-of-plane damping-like torque (τB) is observed. The ratio between τB and the field-like torque (τA) decreases from 0.175 to 0.138 when inserting 1 nm Cu at the interface and then drops to 0.001 when the thickness of Cu intercalation is 2 nm, indicating that Cu intercalation inhibits the τB component of SOT. Moreover, the SOT efficiency is increased from 3.05 to 5.21, which may be attributed to the Cu intercalation being beneficial to improve the interface between Py and ZrSe3. Theoretical calculation has shown that the Cu spacer can change the conductivity of ZrSe3 from semiconductor to conductor, thereby decreasing the Schottky barrier and increasing the transmission efficiency of the spin current. Furthermore, magneto-optical Kerr effect (MOKE) microscopy is employed to verify the current-driven magnetization switching in these structures. In comparison to the ZrSe3/Py bilayer, the critical current density of ZrSe3/Cu/Py is reduced when inserting 1 nm Cu, demonstrating the higher SOT efficiency and lower power consumption in ZrSe3/Cu/Py structures.
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Affiliation(s)
- Lulu Cao
- Key Laboratory of Quantum Materials and Devices of Ministry of Education, School of Physics, Southeast University, Nanjing, Jiangsu 211189, People's Republic of China
| | - Qian Chen
- Key Laboratory of Quantum Materials and Devices of Ministry of Education, School of Physics, Southeast University, Nanjing, Jiangsu 211189, People's Republic of China
| | - Yonghui Zhu
- Key Laboratory of Quantum Materials and Devices of Ministry of Education, School of Physics, Southeast University, Nanjing, Jiangsu 211189, People's Republic of China
| | - Kaiyu Tong
- Department of Physics, Engineering and Technology, University of York, York YO10 5DD, United Kingdom
| | - Wenjia Li
- Department of Physics, Engineering and Technology, University of York, York YO10 5DD, United Kingdom
| | - Jun Ma
- Department of Physics, Engineering and Technology, University of York, York YO10 5DD, United Kingdom
| | - Milad Jalali
- Key Laboratory of Quantum Materials and Devices of Ministry of Education, School of Physics, Southeast University, Nanjing, Jiangsu 211189, People's Republic of China
| | - Zhaocong Huang
- Key Laboratory of Quantum Materials and Devices of Ministry of Education, School of Physics, Southeast University, Nanjing, Jiangsu 211189, People's Republic of China
| | - Jing Wu
- Department of Physics, Engineering and Technology, University of York, York YO10 5DD, United Kingdom
| | - Ya Zhai
- Key Laboratory of Quantum Materials and Devices of Ministry of Education, School of Physics, Southeast University, Nanjing, Jiangsu 211189, People's Republic of China
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Chen Z, Zhang W, Liu J, Zhang M, Li S, Pan F. Influence of Li Content on the Topological Inhibition of Oxygen Loss in Li-Rich Cathode Materials. Adv Mater 2024:e2403307. [PMID: 38630907 DOI: 10.1002/adma.202403307] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2024] [Revised: 04/15/2024] [Indexed: 04/19/2024]
Abstract
Lithium-rich layer oxide cathodes are promising energy storage materials due to their high energy densities. However, the oxygen loss during cycling limits their practical applications. Here, the essential role of Li content on the topological inhibition of oxygen loss in lithium-rich cathode materials and the relationship between the migration network of oxygen ions and the transition metal (TM) component are revealed. Utilizing first-principles calculations in combination with percolation theory and Monte Carlo simulations, it is found that TM ions can effectively encage the oxidized oxygen species when the TM concentration in TM layer exceeds 5/6, which hinders the formation of a percolating oxygen migration network. This study demonstrates the significance of rational compositional design in lithium-rich cathodes for effectively suppressing irreversible oxygen release and enhancing cathode cycling performance.
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Affiliation(s)
- Zhefeng Chen
- School of Advanced Materials, Peking University, Shenzhen Graduate School, Shenzhen, 518055, P. R. China
| | - Wentao Zhang
- School of Advanced Materials, Peking University, Shenzhen Graduate School, Shenzhen, 518055, P. R. China
| | - Jiajie Liu
- School of Advanced Materials, Peking University, Shenzhen Graduate School, Shenzhen, 518055, P. R. China
| | - Mingzheng Zhang
- School of Advanced Materials, Peking University, Shenzhen Graduate School, Shenzhen, 518055, P. R. China
| | - Shunning Li
- School of Advanced Materials, Peking University, Shenzhen Graduate School, Shenzhen, 518055, P. R. China
| | - Feng Pan
- School of Advanced Materials, Peking University, Shenzhen Graduate School, Shenzhen, 518055, P. R. China
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Merino-Diez N, Amador R, Stolz ST, Passerone D, Widmer R, Gröning O. Asymmetric Molecular Adsorption and Regioselective Bond Cleavage on Chiral PdGa Crystals. Adv Sci (Weinh) 2024; 11:e2309081. [PMID: 38353319 DOI: 10.1002/advs.202309081] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/06/2023] [Revised: 01/22/2024] [Indexed: 04/25/2024]
Abstract
Homogenous enantioselective catalysis is nowadays the cornerstone in the manufacturing of enantiopure substances, but its technological implementation suffers from well-known impediments like the lack of endurable catalysts exhibiting long-term stability. The catalytically active intermetallic compound Palladium-Gallium (PdGa), conserving innate bulk chirality on its surfaces, represent a promising system to study asymmetric chemical reactions by heterogeneous catalysis, with prospective relevance for industrial processes. Here, this work investigates the adsorption of 10,10'-dibromo-9,9'-bianthracene (DBBA) on the PdGa:A(1 ¯ 1 ¯ 1 ¯ $\bar{1}\bar{1}\bar{1}$ ) Pd3-terminated surface by means of scanning tunneling microscopy (STM) and spectroscopy (STS). A highly enantioselective adsorption of the molecule evolving into a near 100% enantiomeric excess below room temperature is observed. This exceptionally high enantiomeric excess is attributed to temperature activated conversion of the S to the R chiral conformer. Tip-induced bond cleavage of the R conformer shows a very high regioselectivity of the DBBA debromination. The experimental results are interpreted by density functional theory atomistic simulations. This work extends the knowledge of chirality transfer onto the enantioselective adsorption of non-planar molecules and manifests the ensemble effect of PdGa surfaces resulting in robust regioselective debromination.
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Affiliation(s)
- Nestor Merino-Diez
- Nanotech@surfaces Laboratory, Empa - Swiss Federal Laboratories for Materials Science and Technology, Überlandstrasse 129, Dübendorf, 8600, Switzerland
| | - Raymond Amador
- Nanotech@surfaces Laboratory, Empa - Swiss Federal Laboratories for Materials Science and Technology, Überlandstrasse 129, Dübendorf, 8600, Switzerland
| | - Samuel T Stolz
- Nanotech@surfaces Laboratory, Empa - Swiss Federal Laboratories for Materials Science and Technology, Überlandstrasse 129, Dübendorf, 8600, Switzerland
| | - Daniele Passerone
- Nanotech@surfaces Laboratory, Empa - Swiss Federal Laboratories for Materials Science and Technology, Überlandstrasse 129, Dübendorf, 8600, Switzerland
| | - Roland Widmer
- Nanotech@surfaces Laboratory, Empa - Swiss Federal Laboratories for Materials Science and Technology, Überlandstrasse 129, Dübendorf, 8600, Switzerland
| | - Oliver Gröning
- Nanotech@surfaces Laboratory, Empa - Swiss Federal Laboratories for Materials Science and Technology, Überlandstrasse 129, Dübendorf, 8600, Switzerland
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Siddique F, Anwaar A, Bashir M, Nadeem S, Rawat R, Eyupoglu V, Afzal S, Bibi M, Bin Jardan YA, Bourhia M. Revisiting methotrexate and phototrexate Zinc15 library-based derivatives using deep learning in-silico drug design approach. Front Chem 2024; 12:1380266. [PMID: 38576849 PMCID: PMC10991842 DOI: 10.3389/fchem.2024.1380266] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2024] [Accepted: 03/05/2024] [Indexed: 04/06/2024] Open
Abstract
Introduction: Cancer is the second most prevalent cause of mortality in the world, despite the availability of several medications for cancer treatment. Therefore, the cancer research community emphasized on computational techniques to speed up the discovery of novel anticancer drugs. Methods: In the current study, QSAR-based virtual screening was performed on the Zinc15 compound library (271 derivatives of methotrexate (MTX) and phototrexate (PTX)) to predict their inhibitory activity against dihydrofolate reductase (DHFR), a potential anticancer drug target. The deep learning-based ADMET parameters were employed to generate a 2D QSAR model using the multiple linear regression (MPL) methods with Leave-one-out cross-validated (LOO-CV) Q2 and correlation coefficient R2 values as high as 0.77 and 0.81, respectively. Results: From the QSAR model and virtual screening analysis, the top hits (09, 27, 41, 68, 74, 85, 99, 180) exhibited pIC50 ranging from 5.85 to 7.20 with a minimum binding score of -11.6 to -11.0 kcal/mol and were subjected to further investigation. The ADMET attributes using the message-passing neural network (MPNN) model demonstrated the potential of selected hits as an oral medication based on lipophilic profile Log P (0.19-2.69) and bioavailability (76.30% to 78.46%). The clinical toxicity score was 31.24% to 35.30%, with the least toxicity score (8.30%) observed with compound 180. The DFT calculations were carried out to determine the stability, physicochemical parameters and chemical reactivity of selected compounds. The docking results were further validated by 100 ns molecular dynamic simulation analysis. Conclusion: The promising lead compounds found endorsed compared to standard reference drugs MTX and PTX that are best for anticancer activity and can lead to novel therapies after experimental validations. Furthermore, it is suggested to unveil the inhibitory potential of identified hits via in-vitro and in-vivo approaches.
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Affiliation(s)
- Farhan Siddique
- School of Pharmaceutical Science and Technology, Tianjin University, Tianjin, China
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Bahauddin Zakariya University, Multan, Pakistan
| | - Ahmar Anwaar
- Faculty of Pharmacy, Bahauddin Zakariya University, Multan, Pakistan
| | - Maryam Bashir
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Bahauddin Zakariya University, Multan, Pakistan
- Southern Punjab Institute of Health Sciences, Multan, Pakistan
| | - Sumaira Nadeem
- Department of Pharmacy, The Women University, Multan, Pakistan
| | - Ravi Rawat
- School of Health Sciences & Technology, UPES University, Dehradun, India
| | - Volkan Eyupoglu
- Department of Chemistry, Cankırı Karatekin University, Cankırı, Türkiye
| | - Samina Afzal
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Bahauddin Zakariya University, Multan, Pakistan
| | - Mehvish Bibi
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Bahauddin Zakariya University, Multan, Pakistan
| | - Yousef A. Bin Jardan
- Department of Pharmaceutics, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
| | - Mohammed Bourhia
- Laboratory of Biotechnology and Natural Resources Valorization, Faculty of Sciences, Ibn Zohr University, Agadir, Morocco
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Yao Y, Wang T, Qiang Z, Du W, Li C. Mechanisms of the Formation of Nonvolatile and Volatile Oxidation Products from Methyl Linoleic Acid at High Temperatures. J Agric Food Chem 2024; 72:704-714. [PMID: 38131267 DOI: 10.1021/acs.jafc.3c04405] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2023]
Abstract
The impact of the oxidation of linoleic acid cannot be overlooked in daily food consumption. This study used gas chromatography-mass spectrometry (GC-MS) to identify both nonvolatile oxidation products and volatile oxidation products of methyl linoleic acid at 180 °C and density function theory to investigate oxidation mechanisms. An analysis of nonvolatile oxidation products revealed the presence of three primary oxidation products. The three primary oxidation products were identified as hydroperoxides, peroxide-linked dimers, and heterocyclic compounds in a ratio of 2.70:1:3.69 (mmol/mmol/mmol). The volatile components of secondary oxidation products were found including aldehydes (40.77%), alkanes (19.89%), alcohols (9.02%), furans (6.11%), epoxides (0.46%), and acids (2.50%). DFT calculation proved that the secondary oxidation products mainly came from peroxides (77%). Finally, we look forward to our research contributing positively to lipid autoxidation and human health.
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Affiliation(s)
- Yunping Yao
- State Key Laboratory of Food Nutrition and Safety, Key Laboratory of Food Nutrition and Safety, Ministry of Education, College of Food Science and Engineering, Tianjin University of Science and Technology, Tianjin 300457, China
| | - Tianliang Wang
- State Key Laboratory of Food Nutrition and Safety, Key Laboratory of Food Nutrition and Safety, Ministry of Education, College of Food Science and Engineering, Tianjin University of Science and Technology, Tianjin 300457, China
| | - Zhiyuan Qiang
- State Key Laboratory of Food Nutrition and Safety, Key Laboratory of Food Nutrition and Safety, Ministry of Education, College of Food Science and Engineering, Tianjin University of Science and Technology, Tianjin 300457, China
| | - Wenqi Du
- State Key Laboratory of Food Nutrition and Safety, Key Laboratory of Food Nutrition and Safety, Ministry of Education, College of Food Science and Engineering, Tianjin University of Science and Technology, Tianjin 300457, China
| | - Changmo Li
- State Key Laboratory of Food Nutrition and Safety, Key Laboratory of Food Nutrition and Safety, Ministry of Education, College of Food Science and Engineering, Tianjin University of Science and Technology, Tianjin 300457, China
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7
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Tian N, Comer BM, Medford AJ. Screening and Discovery of Metal Compound Active Sites for Strong and Selective Adsorption of N 2 in Air. ChemSusChem 2023; 16:e202300948. [PMID: 37890028 DOI: 10.1002/cssc.202300948] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 10/26/2023] [Accepted: 10/27/2023] [Indexed: 10/29/2023]
Abstract
Photocatalytic nitrogen fixation has the potential to provide a greener route for producing nitrogen-based fertilizers under ambient conditions. Computational screening is a promising route to discover new materials for the nitrogen fixation process, but requires identifying "descriptors" that can be efficiently computed. In this work, we argue that selectivity toward the adsorption of molecular nitrogen and oxygen can act as a key descriptor. A catalyst that can selectively adsorb nitrogen and resist poisoning of oxygen and other molecules present in air has the potential to facilitate the nitrogen fixation process under ambient conditions. We provide a framework for active site screening based on multifidelity density functional theory (DFT) calculations for a range of metal oxides, oxyborides, and oxyphosphides. The screening methodology consists of initial low-fidelity fixed geometry calculations and a second screening in which more expensive geometry optimizations were performed. The approach identifies promising active sites on several TiO2 polymorph surfaces and a VBO4 surface, and the full nitrogen reduction pathway is studied with the BEEF-vdW and HSE06 functionals on two active sites. The findings suggest that metastable TiO2 polymorphs may play a role in photocatalytic nitrogen fixation, and that VBO4 may be an interesting material for further studies.
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Affiliation(s)
- Nianhan Tian
- Georgia Institute of Technology, 311 Ferst Dr NW, Atlanta, GA, 30332, United States
| | - Benjamin M Comer
- SUNCAT Center for Interface Science and Catalysis 443 Via Ortega, Stanford, CA 94305 United States, SLAC National Accelerator Laboratory 2575 Sand Hill Road, Mail Stop 31, Menlo Park, California, 94025, United States
- Now at Shell Global Solutions (United States) Inc, Houston, TX, United States
| | - Andrew J Medford
- Georgia Institute of Technology, 311 Ferst Dr NW, Atlanta, GA, 30332, United States
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Zhou Y, Cheng B, Huang S, Huang X, Jiang R, Wang X, Zhang W, Jia B, Lu P, Song HZ. The Tunable Electronic and Optical Properties of Two-Dimensional Bismuth Oxyhalides. Nanomaterials (Basel) 2023; 13:2798. [PMID: 37887948 PMCID: PMC10609128 DOI: 10.3390/nano13202798] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/10/2023] [Revised: 10/05/2023] [Accepted: 10/17/2023] [Indexed: 10/28/2023]
Abstract
Two-dimensional (2D) bismuth oxyhalides (BiOX) have attracted much attention as potential optoelectronic materials. To explore their application diversity, we herewith systematically investigate the tunable properties of 2D BiOX using first-principles calculations. Their electronic and optical properties can be modulated by changing the number of monolayers, applying strain, and/or varying the halogen composition. The band gap shrinks monotonically and approaches the bulk value, the optical absorption coefficient increases, and the absorption spectrum redshifts as the layer number of 2D BiOX increases. The carrier transport property can be improved by applying tensile strain, and the ability of photocatalytic hydrogen evolution can be obtained by applying compressive strain. General strain engineering will be effective in linearly tuning the band gap of BiOX in a wide strain range. Strain, together with halogen composition variation, can tune the optical absorption spectrum to be on demand in the range from visible to ultraviolet. This suggests that 2D BiOX materials can potentially serve as tunable novel photodetectors, can be used to improve clean energy techniques, and have potential in the field of flexible optoelectronics.
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Affiliation(s)
- Yong Zhou
- Quantum Research Center, Southwest Institute of Technical Physics, Chengdu 610041, China
- School of Electronic Engineering, Chengdu Technological University, Chengdu 611730, China
| | - Beitong Cheng
- Quantum Research Center, Southwest Institute of Technical Physics, Chengdu 610041, China
| | - Shuai Huang
- Quantum Research Center, Southwest Institute of Technical Physics, Chengdu 610041, China
| | - Xingyong Huang
- Faculty of Science, Yibin University, Yibin 644007, China
| | - Ruomei Jiang
- Quantum Research Center, Southwest Institute of Technical Physics, Chengdu 610041, China
| | - Xule Wang
- Quantum Research Center, Southwest Institute of Technical Physics, Chengdu 610041, China
| | - Wei Zhang
- Quantum Research Center, Southwest Institute of Technical Physics, Chengdu 610041, China
| | - Baonan Jia
- State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing 100876, China
| | - Pengfei Lu
- State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing 100876, China
| | - Hai-Zhi Song
- Quantum Research Center, Southwest Institute of Technical Physics, Chengdu 610041, China
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 610054, China
- State Key Laboratory of High Power Semiconductor Lasers, Changchun University of Science and Technology, Changchun 130013, China
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Huang J, Xue J, Li M, Cheng Y, Lai Z, Hu J, Zhou F, Qu N, Liu Y, Zhu J. Exploration of Solid Solutions and the Strengthening of Aluminum Substrates by Alloying Atoms: Machine Learning Accelerated Density Functional Theory Calculations. Materials (Basel) 2023; 16:6757. [PMID: 37895739 PMCID: PMC10608410 DOI: 10.3390/ma16206757] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/16/2023] [Revised: 10/11/2023] [Accepted: 10/13/2023] [Indexed: 10/29/2023]
Abstract
In this paper, we studied the effects of a series of alloying atoms on the stability and micromechanical properties of aluminum alloy using a machine learning accelerated first-principles approach. In our preliminary work, high-throughput first-principles calculations were explored and the solution energy and theoretical stress of atomically doped aluminum substrates were extracted as basic data. By comparing five different algorithms, we found that the Catboost model had the lowest RMSE (0.24) and lowest MAPE (6.34), and this was used as the final prediction model to predict the solid solution strengthening of the aluminum matrix by the elements. Calculations show that alloying atoms such as K, Na, Y and Tl are difficult to dissolve in the aluminum matrix, whereas alloy atoms like Sc, Cu, B, Zr, Ni, Ti, Nb, V, Cr, Mn, Mo, and W exerted a strengthening influence. Theoretical studies on solid solutions and the strengthening effect of various alloy atoms in an aluminum matrix can offer theoretical guidance for the subsequent selection of suitable alloy elements. The theoretical investigation of alloy atoms in an aluminum matrix unveils the fundamental aspects of the solution strengthening effect, contributing significantly to the expedited development of new aluminum alloys.
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Affiliation(s)
- Jingtao Huang
- School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
| | - Jingteng Xue
- School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
| | - Mingwei Li
- National Key Laboratory for Precision Hot Processing of Metals, Harbin Institute of Technology, Harbin 150001, China
| | - Yuan Cheng
- National Key Laboratory of Science and Technology on Advanced Composites in Special Environments, Harbin Institute of Technology, Harbin 150001, China
| | - Zhonghong Lai
- Center for Analysis, Measurement and Computing, Harbin Institute of Technology, Harbin 150001, China
| | - Jin Hu
- School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
| | - Fei Zhou
- State Key Laboratory for Environment-Friendly Energy Materials, School of Materials Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, China
| | - Nan Qu
- School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
| | - Yong Liu
- School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
- National Key Laboratory for Precision Hot Processing of Metals, Harbin Institute of Technology, Harbin 150001, China
| | - Jingchuan Zhu
- School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
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Singh AP, Ahmad S, Raza K, Gautam HK. Computational screening and MM/GBSA-based MD simulation studies reveal the high binding potential of FDA-approved drugs against Cutibacterium acnes sialidase. J Biomol Struct Dyn 2023:1-11. [PMID: 37545341 DOI: 10.1080/07391102.2023.2242950] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/08/2023]
Abstract
Cutibacterium acnes is an opportunistic pathogen linked with acne vulgaris, affecting 80-90% of teenagers globally. On the leukocyte (WBCs) cell surface, the cell wall anchored sialidase in C. acnes virulence factor, catalysing the sialoconjugates into sialic acids and nutrients for C. acnes resulting in human skin inflammation. The clinical use of antibiotics for acne treatments has severe adverse effects, including microbial dysbiosis and resistance. Therefore, identifying inhibitors for primary virulence factors (Sialidase) was done using molecular docking of 1030 FDA-approved drugs. Initially, based on binding energies (ΔG), Naloxone (ZINC000000389747), Fenoldopam (ZINC000022116608), Labetalol (ZINC000000403010) and Thalitone (ZINC000000057255) were identified that showed high binding energies as -10.2, -10.1, -9.9 and -9.8 kcal/mol, respectively. In 2D analysis, these drugs also showed considerable structural conformer of hydrogen and hydrophobic interactions. Further, a 100 ns MD simulation study found the lowest deviation and fluctuations with various intermolecular interactions to stabilise the complexes. Out of 4, the Naloxone molecule showed robust, steady, and stable RMSD 0.23 ± 0.18 nm. Further, MMGBSA analysis supports MD results and found strong binding energy (ΔG) -29.71 ± 4.97 kcal/mol. In Comparative studies with Neu5Ac2en (native substrate) revealed naloxone has a higher affinity for sialidase. The PCA analysis showed that Naloxone and Thalitone were actively located on the active site, and other compounds were flickered. Our extensive computational and statistical report demonstrates that these FDA drugs can be validated as potential sialidase inhibitors.Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Akash Pratap Singh
- Infectious Disease Laboratory, Institute of Genomics and Integrative Biology (IGIB), New Delhi, India
- Academy of Innovative and Scientific Research (AcSIR), Ghaziabad, India
| | - Shaban Ahmad
- Department of Computer Science, Jamia Millia Islamia, New Delhi, India
| | - Khalid Raza
- Department of Computer Science, Jamia Millia Islamia, New Delhi, India
| | - Hemant K Gautam
- Infectious Disease Laboratory, Institute of Genomics and Integrative Biology (IGIB), New Delhi, India
- Academy of Innovative and Scientific Research (AcSIR), Ghaziabad, India
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Mohanty SK, Krasilnikov M, Oppelt A, Stephan F, Sertore D, Monaco L, Pagani C, Hillert W. Development and Characterization of Multi-Alkali Antimonide Photocathodes for High-Brightness RF Photoinjectors. Micromachines (Basel) 2023; 14:1182. [PMID: 37374768 DOI: 10.3390/mi14061182] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2023] [Accepted: 05/29/2023] [Indexed: 06/29/2023]
Abstract
Due to their excellent photoemissive properties, especially low thermal emittance and high sensitivity in the green wavelength, multi-alkali antimonide photocathodes, in particular, cesium-potassium-antimonide, emerged as prominent photoemissive materials for the electron sources of high-repetition-rate FEL applications. To explore its feasibility of operating in a high-gradient RF gun, DESY collaborated with INFN LASA to develop multi-alkali photocathode materials. In this report, we describe the recipe of K-Cs-Sb photocathodes, which were grown on a Mo substrate by varying the foundational Sb layer thickness using sequential deposition techniques. This report also illustrates the information regarding the film thickness, substrate temperature, deposition rate, and its possible effects on the photocathode's properties. In addition, the influence of temperature on the cathode degradation is also summarized. Furthermore, in the framework of density functional theory (DFT), we investigated the electronic and optical properties of the K2CsSb material. The optical properties, such as dielectric function, reflectivity, refracting index, and extinction coefficient, were evaluated. The correlation between the calculated and measured optical properties, such as reflectivity, provides a better and more efficient strategy to rationalize and understand the photoemissive material's properties.
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Affiliation(s)
- Sandeep Kumar Mohanty
- Deutsches Elektronen-Synchrotron DESY, 15738 Zeuthen, Germany
- Istituto Nazionale di Fisica Nucleare-LASA, 20090 Segrate, Italy
- Institute of Experimental Physics, University of Hamburg, 22607 Hamburg, Germany
| | | | - Anne Oppelt
- Deutsches Elektronen-Synchrotron DESY, 15738 Zeuthen, Germany
| | - Frank Stephan
- Deutsches Elektronen-Synchrotron DESY, 15738 Zeuthen, Germany
| | - Daniele Sertore
- Istituto Nazionale di Fisica Nucleare-LASA, 20090 Segrate, Italy
| | - Laura Monaco
- Istituto Nazionale di Fisica Nucleare-LASA, 20090 Segrate, Italy
| | - Carlo Pagani
- Istituto Nazionale di Fisica Nucleare-LASA, 20090 Segrate, Italy
- Dipartimento di Fisica, Università degli Studi di Milano, 20122 Milano, Italy
| | - Wolfgang Hillert
- Institute of Experimental Physics, University of Hamburg, 22607 Hamburg, Germany
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12
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Mehta CC, Rohit S, Patel S, Bhatt HG. New molecular insights for 4 H-1,2,4-triazole derivatives as inhibitors of tankyrase and Wnt-signaling antagonist: a molecular dynamics simulation study. J Biomol Struct Dyn 2023; 41:13496-13508. [PMID: 36755438 DOI: 10.1080/07391102.2023.2175376] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2022] [Accepted: 01/27/2023] [Indexed: 02/10/2023]
Abstract
Tankyrase (TNKS) enzymes remained central biotargets to treat Wnt-driven colorectal cancers. The success of Olaparib posited the druggability of PARP family enzymes depending on their role in tumor proliferation. In this work, an MD-simulation-based comparative assessment of the protein-ligand interactions using the best-docked poses of three selected compounds (two of the designed and previously synthesized molecules obtained through molecular docking and one reported TNKS inhibitor) was performed for a 500 ns period. The PDB:ID-7KKP and 3U9H were selected for TNKS1 and TNKS2, respectively. The Molecular Mechanics Generalized Born Surface Area (MM-GBSA) based binding energy data exhibited stronger binding of compound-15 (average values of -102.92 and -104.32 kcal/mol for TNKS1 and TNKS2, respectively) as compared to compound-22 (average values of -82.99 and -85.68 kcal/mol for TNKS1 and TNKS2, respectively) and the reported compound-32 (average values of -81.89 and -74.43 kcal/mol for TNKS1 and TNKS2, respectively). Compound-15 and compound-22 exhibited comparable or superior binding to both receptors forming stable complexes when compared to that of compound-32 upon examining their MD trajectories. The key contributors were hydrophobic stacking and optimum hydrogen bonding allowing these molecules to occupy the adenosine pocket by interfacing D-loop residues. The results of bond distance analysis, radius of gyration, root mean square deviation, root mean square fluctuation, snapshots at different time intervals, LUMO-HUMO energy differences, electrostatic potential calculations, and binding free energy suggested better binding efficiency for compound-15 to TNKS enzymes. The computed physicochemical and ADMET properties of compound-15 were encouraging and could be explored further for drug development.Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Chirag C Mehta
- Department of Pharmaceutical Chemistry, Institute of Pharmacy, Nirma University, Ahmedabad, India
| | | | - Saumya Patel
- Department of Botany, Bioinformatics and Climate Change Impacts Management, Gujarat University, Ahmedabad, India
| | - Hardik G Bhatt
- Department of Pharmaceutical Chemistry, Institute of Pharmacy, Nirma University, Ahmedabad, India
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13
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Nautiyal H, Lohani K, Mukherjee B, Isotta E, Malagutti MA, Ataollahi N, Pallecchi I, Putti M, Misture ST, Rebuffi L, Scardi P. Mechanochemical Synthesis of Sustainable Ternary and Quaternary Nanostructured Cu 2SnS 3, Cu 2ZnSnS 4, and Cu 2ZnSnSe 4 Chalcogenides for Thermoelectric Applications. Nanomaterials (Basel) 2023; 13:nano13020366. [PMID: 36678122 PMCID: PMC9866987 DOI: 10.3390/nano13020366] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2022] [Revised: 01/10/2023] [Accepted: 01/11/2023] [Indexed: 05/27/2023]
Abstract
Copper-based chalcogenides have emerged as promising thermoelectric materials due to their high thermoelectric performance, tunable transport properties, earth abundance and low toxicity. We have presented an overview of experimental results and first-principal calculations investigating the thermoelectric properties of various polymorphs of Cu2SnS3 (CTS), Cu2ZnSnS4 (CZTS), and Cu2ZnSnSe4 (CZTSe) synthesized by high-energy reactive mechanical alloying (ball milling). Of particular interest are the disordered polymorphs of these materials, which exhibit phonon-glass-electron-crystal behavior-a decoupling of electron and phonon transport properties. The interplay of cationic disorder and nanostructuring leads to ultra-low thermal conductivities while enhancing electronic transport. These beneficial transport properties are the consequence of a plethora of features, including trap states, anharmonicity, rattling, and conductive surface states, both topologically trivial and non-trivial. Based on experimental results and computational methods, this report aims to elucidate the details of the electronic and lattice transport properties, thereby confirming that the higher thermoelectric (TE) performance of disordered polymorphs is essentially due to their complex crystallographic structures. In addition, we have presented synchrotron X-ray diffraction (SR-XRD) measurements and ab initio molecular dynamics (AIMD) simulations of the root-mean-square displacement (RMSD) in these materials, confirming anharmonicity and bond inhomogeneity for disordered polymorphs.
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Affiliation(s)
- Himanshu Nautiyal
- Department of Civil, Environmental and Mechanical Engineering, University of Trento, Via Mesiano 77, 38123 Trento, Italy
| | - Ketan Lohani
- Department of Civil, Environmental and Mechanical Engineering, University of Trento, Via Mesiano 77, 38123 Trento, Italy
| | - Binayak Mukherjee
- Department of Civil, Environmental and Mechanical Engineering, University of Trento, Via Mesiano 77, 38123 Trento, Italy
| | - Eleonora Isotta
- Department of Civil, Environmental and Mechanical Engineering, University of Trento, Via Mesiano 77, 38123 Trento, Italy
| | - Marcelo Augusto Malagutti
- Department of Civil, Environmental and Mechanical Engineering, University of Trento, Via Mesiano 77, 38123 Trento, Italy
| | - Narges Ataollahi
- Department of Civil, Environmental and Mechanical Engineering, University of Trento, Via Mesiano 77, 38123 Trento, Italy
| | - Ilaria Pallecchi
- Consiglio Nazionale delle Ricerche—SuPerconducting and Other INnovative Materials and Devices Institute (CNR-SPIN), Department of Physics, Via Dodecaneso 33, 16146 Genova, Italy
| | - Marina Putti
- Department of Physics, University of Genova, Via Dodecaneso 33, 16146 Genova, Italy
| | - Scott T. Misture
- Department of Materials Science & Engineering, Alfred University, Alfred, NY 14802, USA
| | - Luca Rebuffi
- Argonne National Laboratory, 9700 South Cass Avenue, Lemont, IL 60439, USA
| | - Paolo Scardi
- Department of Civil, Environmental and Mechanical Engineering, University of Trento, Via Mesiano 77, 38123 Trento, Italy
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14
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Gao J, Wang G, Wang W, Yu L, Peng B, El-Harairy A, Li J, Zhang G. Engineering Electronic Transfer Dynamics and Ion Adsorption Capability in Dual-Doped Carbon for High-Energy Potassium Ion Hybrid Capacitors. ACS Nano 2022; 16:6255-6265. [PMID: 35302347 DOI: 10.1021/acsnano.2c00140] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Sodium and potassium ions energy storage systems with low cost and high energy/power densities have recently drawn increasing interest as promising candidates for grid-level applications, while the lack of suitable anode materials with fast ion diffusion kinetics highly hinders their development. Herein, we develop a nanoscale confined in situ oxidation polymerization process followed by a conventional carbonization treatment to generate phosphorus and nitrogen dual-doped hollow carbon spheres (PNHCS), which can realize superior sodium and potassium ion storage performance. Importantly, the density functional theory calculation and combined characterizations, e.g., in situ Raman spectroscopy and ex situ X-ray photoelectron spectroscopy, decipher that the P/N doping can enhance the electronic transfer dynamics and ion adsorption capability, which are responsible for enhanced electrochemical performance. Inspiringly, the practicability of the PNHCS anode is demonstrated by assembling the potassium ion hybrid capacitors (KIHCs), where the prominent energy density is 178.80 Wh kg-1 at a power density of 197.65 W kg-1, with excellent cycling stability, can be achieved. This work not only promotes the development of efficient anode material for sodium/potassium ion storage devices but also deciphers the embedded ion storage mechanism.
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Affiliation(s)
- Jingyu Gao
- Hefei National Laboratory for Physical Sciences at the Microscale, CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Gongrui Wang
- Hefei National Laboratory for Physical Sciences at the Microscale, CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Wentao Wang
- Guizhou Provincial Key Laboratory of Computational Nano-Material Science, Guizhou Education University, Guiyang 550018, China
| | - Lai Yu
- Hefei National Laboratory for Physical Sciences at the Microscale, CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Bo Peng
- Hefei National Laboratory for Physical Sciences at the Microscale, CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Ahmed El-Harairy
- Hefei National Laboratory for Physical Sciences at the Microscale, CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Jie Li
- Hefei National Laboratory for Physical Sciences at the Microscale, CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Genqiang Zhang
- Hefei National Laboratory for Physical Sciences at the Microscale, CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui 230026, China
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15
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Xiao W, Liu T, Zhang Y, Zhong Z, Zhang X, Luo Z, Lv B, Zhou X, Zhang Z, Liu X. Tunable Schottky Barrier and Interfacial Electronic Properties in Graphene/ZnSe Heterostructures. Front Chem 2021; 9:744977. [PMID: 34660536 PMCID: PMC8519308 DOI: 10.3389/fchem.2021.744977] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2021] [Accepted: 08/10/2021] [Indexed: 11/13/2022] Open
Abstract
With a direct bandgap, two-dimensional (2D) ZnSe is a promising semiconductor material in photoelectric device fields. In this work, based on first-principles methods, we theoretically studied the modulation of the Schottky barrier height (SBH) by applying horizontal and vertical strains on graphene/ZnSe heterojunction. The results show that the inherent electronic properties of graphene and ZnSe monolayers are both well-conserved because of the weak van der Waals (vdW) forces between two sublayers. Under horizontal strain condition, the n(p)-type SBH decreases from 0.56 (1.62) eV to 0.21 (0.78) eV. By changing the interlayer distance in the range of 2.8 Å to 4.4 Å, the n(p)-type SBH decreases (increases) from 0.88 (0.98) eV to 0.21 (1.76) eV. These findings prove the SBH of the heterojunction to be tuned effectively, which is of great significance to optoelectronic devices, especially in graphene/ZnSe-based nano-electronic and optoelectronic devices.
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Affiliation(s)
- Wenjun Xiao
- College of Physics and Electronic Science, Guizhou Normal University, Guiyang, China
| | - Tianyun Liu
- College of Physics and Electronic Science, Guizhou Normal University, Guiyang, China
| | - Yuefei Zhang
- College of Physics and Electronic Science, Guizhou Normal University, Guiyang, China.,Key Laboratory of Low Dimensional Condensed Matter Physics of Higher Educational Institution of Guizhou Province, Guizhou Normal University, Guiyang, China
| | - Zhen Zhong
- College of Physics and Electronic Science, Guizhou Normal University, Guiyang, China
| | - Xinwei Zhang
- Beijing Institute of Space Science and Technology Information, Beijing, China
| | - Zijiang Luo
- College of Information, Guizhou University of Finance and Economics, Guiyang, China
| | - Bing Lv
- College of Physics and Electronic Science, Guizhou Normal University, Guiyang, China.,Key Laboratory of Low Dimensional Condensed Matter Physics of Higher Educational Institution of Guizhou Province, Guizhou Normal University, Guiyang, China
| | - Xun Zhou
- College of Physics and Electronic Science, Guizhou Normal University, Guiyang, China.,Key Laboratory of Low Dimensional Condensed Matter Physics of Higher Educational Institution of Guizhou Province, Guizhou Normal University, Guiyang, China
| | - Zhaocai Zhang
- Beijing Institute of Space Science and Technology Information, Beijing, China
| | - Xuefei Liu
- College of Physics and Electronic Science, Guizhou Normal University, Guiyang, China.,Key Laboratory of Low Dimensional Condensed Matter Physics of Higher Educational Institution of Guizhou Province, Guizhou Normal University, Guiyang, China
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16
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Lu Z, Chen J, Wang W, Li W, Sun M, Wang Y, Wang X, Ye J, Rao H. Electrocatalytic, Kinetic, and Mechanism Insights into the Oxygen-Reduction Catalyzed Based on the Biomass-Derived FeO x @N-Doped Porous Carbon Composites. Small 2021; 17:e2007326. [PMID: 33783972 DOI: 10.1002/smll.202007326] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2020] [Revised: 02/16/2021] [Indexed: 06/12/2023]
Abstract
A valid strategy for amplifying the oxygen reduction reaction (ORR) efficiency of non-noble electrocatalyst in both alkaline and acid electrolytes by decorated with a layer of biomass derivative nitrogen-doped carbon (NPC) is proposed. Herein, a top-down strategy for the generally fabricating NPC matrix decorated with trace of metal oxides nanoparticles (FeOx NPs) by a dual-template assisted high-temperature pyrolysis process is reported. A high-activity FeOx /FeNC (namely Hemin/NPC-900) ORR electrocatalyst is prepared via simply carbonizing the admixture of Mg5 (OH)2 (CO3 )4 and NaCl as dual-templates, melamine and acorn shells as nitrogen and carbon source, hemin as a natural iron and nitrogen source, respectively. Owing to its unique 3D porous construction, large BET areas (819.1 m2 ∙g-1 ), and evenly dispersed active sites (FeNx , CN, and FeO parts), the optimized Hemin/NPC-900 catalyst displays comparable ORR catalytic activities, remarkable survivability to methanol, and preferable long-term stability in both alkali and acid electrolyte compared with benchmark Pt/C. More importantly, density function theory computations certify that the interaction between Fe3 O4 nanoparticles and arm-GN (graphitic N at armchair edge) active sites can effectually promote ORR electrocatalytic performance by a lower overpotential of 0.81 eV. Accordingly, the research provides some insight into design of low-cost non-precious metal ORR catalysts in theory and practice.
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Affiliation(s)
- Zhiwei Lu
- College of Science, Sichuan Agricultural University, Xin Kang Road, Yucheng District, Ya'an, 625014, P.R. China
| | - Jinpeng Chen
- College of Science, Sichuan Agricultural University, Xin Kang Road, Yucheng District, Ya'an, 625014, P.R. China
| | - WenLi Wang
- College of Science, Sichuan Agricultural University, Xin Kang Road, Yucheng District, Ya'an, 625014, P.R. China
| | - Wenjin Li
- College of Science, Sichuan Agricultural University, Xin Kang Road, Yucheng District, Ya'an, 625014, P.R. China
| | - Mengmeng Sun
- College of Science, Sichuan Agricultural University, Xin Kang Road, Yucheng District, Ya'an, 625014, P.R. China
| | - Yanying Wang
- College of Science, Sichuan Agricultural University, Xin Kang Road, Yucheng District, Ya'an, 625014, P.R. China
| | - Xianxiang Wang
- College of Science, Sichuan Agricultural University, Xin Kang Road, Yucheng District, Ya'an, 625014, P.R. China
| | - Jianshan Ye
- School of Chemistry and Chemical Engineering, Key Laboratory of Fuel Cell Technology of Guangdong Province, South China University of Technology, Guangzhou, 510641, P.R. China
| | - Hanbing Rao
- College of Science, Sichuan Agricultural University, Xin Kang Road, Yucheng District, Ya'an, 625014, P.R. China
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17
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Sheng H, Wang W, Dai R, Ning J, Zhang L, Wu Q, Zhang F, Yan J, Zhang W. New Insights into Cd 2+/Fe 3+ Co-Doped BiOBr for Enhancing the Photocatalysis Efficiency of Dye Decomposition under Visible-Light. Nanomaterials (Basel) 2021; 11:nano11020423. [PMID: 33562318 PMCID: PMC7914912 DOI: 10.3390/nano11020423] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/28/2020] [Revised: 02/01/2021] [Accepted: 02/02/2021] [Indexed: 11/16/2022]
Abstract
Uniform flowerlike microspheres Cd2+/Fe3+ co-doped BiOBr were prepared with the aid of the microwave hydrothermal process. The results indicate that the degradation performance of Bi1-xCdxOBr and Bi1-xFexOBr are 1.31 and 2.05 times that of BiOBr for RhB, respectively. Moreover, the novel Cd2+/Fe3+ co-doped BiOBr photocatalysts with ~0.42 eV impurity bands presented remarkably enhanced photocatalytic activities with being 3.10 times that of pure BiOBr, by achieving e-/h+ efficient separation and narrowed bandgap with the ions synergistic effect of Cd2+ and Fe3+. Based on DFT insights, the photodegradation mechanism was systematically studied that the conversion of multivalent Fe3+ ions promoted the production of •O2-, and Cd2+ ions worked as electron transfer mediators, which elucidated that the •O2- and h+VB mainly participated in the catalytic reaction. The experimental and theoretical results show that the synergistic effects of multi-ion doping have great potential in the field of photocatalysis.
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Affiliation(s)
- Hong Sheng
- College of Mathematics & Physics, Weinan Normal University, Weinan 714000, China;
| | - Wei Wang
- School of Physics and Electronic Information, Yan’an University, Yan’an 716000, China; (W.W.); (R.D.); (J.N.); (L.Z.); (Q.W.)
- School of Information Science Technology, Northwest University, Xi’an 710127, China
| | - Rong Dai
- School of Physics and Electronic Information, Yan’an University, Yan’an 716000, China; (W.W.); (R.D.); (J.N.); (L.Z.); (Q.W.)
| | - Jing Ning
- School of Physics and Electronic Information, Yan’an University, Yan’an 716000, China; (W.W.); (R.D.); (J.N.); (L.Z.); (Q.W.)
| | - Lei Zhang
- School of Physics and Electronic Information, Yan’an University, Yan’an 716000, China; (W.W.); (R.D.); (J.N.); (L.Z.); (Q.W.)
| | - Qiao Wu
- School of Physics and Electronic Information, Yan’an University, Yan’an 716000, China; (W.W.); (R.D.); (J.N.); (L.Z.); (Q.W.)
| | - Fuchun Zhang
- School of Physics and Electronic Information, Yan’an University, Yan’an 716000, China; (W.W.); (R.D.); (J.N.); (L.Z.); (Q.W.)
- Correspondence: (F.Z.); (J.Y.); (W.Z.); Tel.: +86-1832-991-8036 (F.Z.); +86-1362-928-0982 (J.Y.); +86-1311-719-0486 (W.Z.)
| | - Junfeng Yan
- School of Information Science Technology, Northwest University, Xi’an 710127, China
- Correspondence: (F.Z.); (J.Y.); (W.Z.); Tel.: +86-1832-991-8036 (F.Z.); +86-1362-928-0982 (J.Y.); +86-1311-719-0486 (W.Z.)
| | - Weibin Zhang
- School of Physics and Optoelectronic Engineering, Yangtze University, Jingzhou 434023, China
- Correspondence: (F.Z.); (J.Y.); (W.Z.); Tel.: +86-1832-991-8036 (F.Z.); +86-1362-928-0982 (J.Y.); +86-1311-719-0486 (W.Z.)
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18
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Tang Z, Chang C, Bao F, Tian L, Liu H, Wang M, Zhu C, Xu J. Feasibility of Predicting Static Dielectric Constants of Polymer Materials: A Density Functional Theory Method. Polymers (Basel) 2021; 13:polym13020284. [PMID: 33477272 PMCID: PMC7830834 DOI: 10.3390/polym13020284] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2020] [Revised: 01/13/2021] [Accepted: 01/14/2021] [Indexed: 11/16/2022] Open
Abstract
The rapid development of electronic devices with high integration levels, a light weight, and a multifunctional performance has fostered the design of novel polymer materials with low dielectric constants, which is crucial for the electronic packaging and encapsulation of these electronic components. Theoretical studies are more efficient and cost-effective for screening potential polymer materials with low dielectric constants than experimental investigations. In this study, we used a molecular density functional theory (DFT) approach combined with the B3LYP functional at the 6-31+G(d, p) basis set to validate the feasibility of predicting static dielectric constants of the polymer materials. First, we assessed the influence of the basis sets on the polarizability. Furthermore, the changes of polarizability, polarizability per monomer unit, and differences in polarizability between the consecutive polymer chains as a function of the number of monomers were summarized and discussed. We outlined a similar behavior for the volume of the polymers as well. Finally, we simulated dielectric constants of three typical polymer materials, polyethylene (PE), polytetrafluoroethylene (PTFE), and polystyrene (PS), by combining with the Clausius-Mossotti equation. The simulated results showed excellent agreement with experimental data from the literature, suggesting that this theoretical DFT method has great potential for the molecular design and development of novel polymer materials with low dielectric constants.
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Affiliation(s)
| | | | | | | | | | - Mingliang Wang
- Correspondence: (M.W.); (C.Z.); Tel.: +86-755-26535427 (M.W. & C.Z.)
| | - Caizhen Zhu
- Correspondence: (M.W.); (C.Z.); Tel.: +86-755-26535427 (M.W. & C.Z.)
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19
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Lee J, Ryu JH, Kim B, Hussain F, Mahata C, Sim E, Ismail M, Abbas Y, Abbas H, Lee DK, Kim MH, Kim Y, Choi C, Park BG, Kim S. Synaptic Characteristics of Amorphous Boron Nitride-Based Memristors on a Highly Doped Silicon Substrate for Neuromorphic Engineering. ACS Appl Mater Interfaces 2020; 12:33908-33916. [PMID: 32608233 DOI: 10.1021/acsami.0c07867] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
In this study, the resistive switching and synaptic properties of a complementary metal-oxide semiconductor-compatible Ti/a-BN/Si device are investigated for neuromorphic systems. A gradual change in resistance is observed in a positive SET operation in which Ti diffusion is involved in the conducting path. This operation is extremely suitable for synaptic devices in hardware-based neuromorphic systems. The isosurface charge density plots and experimental results confirm that boron vacancies can help generate a conducting path, whereas the conducting path generated by a Ti cation from interdiffusion forms is limited. A negative SET operation causes a considerable decrease in the formation energy of only boron vacancies, thereby increasing the conductivity in the low-resistance state, which may be related to RESET failure and poor endurance. The pulse transient characteristics, potentiation and depression characteristics, and good retention property of eight multilevel cells also indicate that the positive SET operation is more suitable for a synaptic device owing to the gradual modulation of conductance. Moreover, pattern recognition accuracy is examined by considering the conductance values of the measured data in the Ti/a-BN/Si device as the synaptic part of a neural network. The linear and symmetric synaptic weight update in a positive SET operation with an incremental voltage pulse scheme ensures higher pattern recognition accuracy.
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Affiliation(s)
- Jinju Lee
- School of Electronics Engineering, Chungbuk National University, Cheongju 28644, South Korea
| | - Ji-Ho Ryu
- School of Electronics Engineering, Chungbuk National University, Cheongju 28644, South Korea
| | - Boram Kim
- School of Electrical and Computer Engineering, University of Seoul, Seoul, 02504, South Korea
| | - Fayyaz Hussain
- Materials Research Simulation Laboratory (MSRL) Department of physics, Bahauddin Zakariya University, Multan 60800, Pakistan
| | - Chandreswar Mahata
- School of Electronics Engineering, Chungbuk National University, Cheongju 28644, South Korea
| | - Eunjin Sim
- School of Electronics Engineering, Chungbuk National University, Cheongju 28644, South Korea
| | - Muhammad Ismail
- School of Electronics Engineering, Chungbuk National University, Cheongju 28644, South Korea
| | - Yawar Abbas
- Department of Physics, Khalifa University, Abu Dhabi 127788, United Arab Emirates
| | - Haider Abbas
- Division of Materials Science and Engineering, Hanyang University, Seoul 04763, South Korea
| | - Dong Keun Lee
- Inter-university Semiconductor Research Center (ISRC) and the Department of Electrical and Computer Engineering, Seoul National University, Seoul 08826, South Korea
| | - Min-Hwi Kim
- Inter-university Semiconductor Research Center (ISRC) and the Department of Electrical and Computer Engineering, Seoul National University, Seoul 08826, South Korea
| | - Yoon Kim
- School of Electrical and Computer Engineering, University of Seoul, Seoul, 02504, South Korea
| | - Changhwan Choi
- Division of Materials Science and Engineering, Hanyang University, Seoul 04763, South Korea
| | - Byung-Gook Park
- Inter-university Semiconductor Research Center (ISRC) and the Department of Electrical and Computer Engineering, Seoul National University, Seoul 08826, South Korea
| | - Sungjun Kim
- Division of Electronics and Electrical Engineering, Dongguk University, Seoul 04620, South Korea
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Zhu YL, Wang CJ, Gao F, Xiao ZX, Zhao PL, Wang JY. Calculation on surface energy and electronic properties of CoS 2. R Soc Open Sci 2020; 7:191653. [PMID: 32874599 PMCID: PMC7428281 DOI: 10.1098/rsos.191653] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/27/2019] [Accepted: 05/13/2020] [Indexed: 06/11/2023]
Abstract
Density functional theory was employed to investigate the (111), (200), (210), (211) and (220) surfaces of CoS2. The surface energies were calculated with a sulfur environment using first-principle-based thermodynamics. It is founded that surfaces with metal atoms at their outermost layer have higher energy. The stoichiometric (220) surface terminated by two layer of sulfur atoms is most stable under the sulfur-rich condition, while the non-stoichiometric (211) surface terminated by a layer of Co atoms has the lower energy under the sulfur-poor environment. The electric structure results show that the front valence electrons of (200) surface are active, indicating that there may be some active sites on this face. There is an energy gap between the stoichiometric (220) and (211), which has low Fermi energy, indicating that their electronic structures are dynamically stable. Spin-polarized bands are calculated on the stoichiometric surfaces, and these two (200) and (210) surfaces are predicted to be noticeably spin-polarized. The Bravais-Friedel-Donnay-Harker (BFDH) method is adopted to predict crystal growth habit. The results show that the most important crystal planes for the CoS2 crystal growth are (111) and (200) planes, and the macroscopic morphology of CoS2 crystal may be spherical, cubic, octahedral, prismatic or plate-shaped, which have been verified by experiments.
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Affiliation(s)
- Yan-li Zhu
- State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, People's Republic of China
| | - Cong-Jie Wang
- State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, People's Republic of China
| | - Fei Gao
- Battery Energy Storage Technology Laboratory, China Electric Power Research Institute, Beijing 100192, People's Republic of China
| | - Zhi-xia Xiao
- State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, People's Republic of China
| | - Peng-long Zhao
- Qaidam Xinghua Lithium Salt Co., Ltd, No. 1 Dahua Street, Dachaidan, Haixi, Qinghai, 817000, People's Republic of China
| | - Jian-yong Wang
- State Key Laboratory of Advanced Chemical Power Sources, Guizhou Meiling Power Sources Co. Ltd., Zunyi, Guizhou 563003, People's Republic of China
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Chini MG, Urbani D, Dambruoso P, Riccio R, Bifulco G. Elucidating heteroatom influence on homonuclear 4 J (H,H) coupling constants by DFT/NMR approach. Magn Reson Chem 2020; 58:566-575. [PMID: 31883165 DOI: 10.1002/mrc.4983] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2019] [Revised: 12/12/2019] [Accepted: 12/16/2019] [Indexed: 06/10/2023]
Abstract
We report the structural dependency of long range scalar J-coupling constant across four bonds as function of the dihedral angles Φ1 and Φ3. The calculated homonuclear coupling constants 4 J(H,H ), obtained at a density functional theory level, were measured between C(1)─X(2) and X(2)─C(3) bonds in three-term models, where C, N, O, and S were systematically used as the second atom of the alkyl structures (1-4). The 4 J(H,H) calculated values, tabulated for variation of 30° for both Φ1 and Φ3, have disclosed an unexpected detectable coupling constant (4 J(H,H ) ≥ 1 Hz) across heteroatoms, useful to provide valuable structural information. A 2-methyl-1,3-dithiane sulfide (5) was used as a case study to prove the applicability and reliability of the calculated values to real issues. The 4 J(H,H ) values obtained at density functional theory for the system 4 have reproduced with good accuracy an unexpected experimental 4 J(H2ax-H4ax ) = 1.01 Hz of sulfide molecule (5), suggesting these calculated coupling constant values as a new powerful tool for the organic synthesis and stereochemical analysis.
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Affiliation(s)
| | - Daniele Urbani
- Istituto per la Sintesi Organica e la Fotoreattività, Consiglio Nazionale delle Ricerche, Bologna, Italy
| | - Paolo Dambruoso
- Istituto per la Sintesi Organica e la Fotoreattività, Consiglio Nazionale delle Ricerche, Bologna, Italy
| | - Raffaele Riccio
- Department of Pharmacy, University of Salerno, Fisciano, Italy
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Parida P, Bhowmick S, Saha A, Islam MA. Insight into the screening of potential beta-lactamase inhibitors as anti-bacterial chemical agents through pharmacoinformatics study. J Biomol Struct Dyn 2020; 39:923-942. [PMID: 31984863 DOI: 10.1080/07391102.2020.1720819] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Drug resistance is an unsolved and major concern in the bacterial infection. Continuous development of drug-resistance to the antibiotics exponentially rises the danger of bacterial infections. Chemical components from the plants are becoming a major resource of potentially effective therapeutic chemical agents for the wide range of diseases including bacterial infections. In the current study, pharmacoinformatics methodologies were implemented on more than two hundred known phytochemicals to find promising beta-lactamase inhibitors for therapeutically effective anti-bacterial agents. Initially, the molecular docking-based score was used to reduce the chemical space of the selected dataset. Fourteen molecules were found to have more affinity towards the beta-lactamase in compared to the well-known anti-bacterial agent, Avibactam. Binding interactions analysis revealed the strong binding interactions between phytochemicals and catalytic amino residues. For further analysis, molecular dynamics (MD) simulations, density functional theory (DFT) and in silico pharmacokinetics studies were performed. Parameters from MD simulations studies suggested that selected molecules are strong enough to retain in the active site in different orientations of the beta-lactamase. The orbital energies obtained from the DFT study was undoubtedly explained the potentiality of the selected compounds for being effective beta-lactamase inhibitors. The drug-likeness and acceptable pharmacokinetics parameters were observed using in silico ADME analysis. Therefore, observations from the multiple pharmacoinformatics approach explained without any doubt that selected molecules are potential enough being promising anti-bacterial compounds. [Formula: see text] Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Pratap Parida
- School of Medical Science and Technology, Indian Institute of Technology, Kharagpur, India
| | - Shovonlal Bhowmick
- Department of Chemical Technology, University of Calcutta, Kolkata, India
| | - Achintya Saha
- Department of Chemical Technology, University of Calcutta, Kolkata, India
| | - Md Ataul Islam
- Division of Pharmacy and Optometry, School of Health Sciences, Faculty of Biology, Medicine and Health, University of Manchester, Manchester, UK.,School of Health Sciences, University of Kwazulu-Natal, Durban, South Africa.,Department of Chemical Pathology, Faculty of Health Sciences, University of Pretoria and National Health Laboratory Service Tshwane Academic Division, Pretoria, South Africa
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23
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Wang Z, Wu H, Li Q, Besenbacher F, Li Y, Zeng XC, Dong M. Reversing Interfacial Catalysis of Ambipolar WSe 2 Single Crystal. Adv Sci (Weinh) 2020; 7:1901382. [PMID: 32042552 PMCID: PMC7001631 DOI: 10.1002/advs.201901382] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/06/2019] [Revised: 10/10/2019] [Indexed: 05/26/2023]
Abstract
An improved understanding of the origin of the electrocatalytic activity is of importance to the rational design of highly efficient electrocatalysts for the hydrogen evolution reaction. Here, an ambipolar single-crystal tungsten diselenide (WSe2) semiconductor is employed as a model system where the conductance and carrier of WSe2 can be individually tuned by external electric fields. The field-tuned electrochemical microcell is fabricated based on the single-crystal WSe2 and the catalytic activity of the WSe2 microcell is measured versus the external electric field. Results show that WSe2 with electrons serving as the dominant carrier yields much higher activity than WSe2 with holes serving as the dominant carrier even both systems exhibit similar conductance. The catalytic activity enhancement can be characterized by the Tafel slope decrease from 138 to 104 mV per decade, while the electron area concentration increases from 0.64 × 1012 to 1.72 × 1012 cm-2. To further understand the underlying mechanism, the Gibbs free energy and charge distribution for adsorbed hydrogen on WSe2 versus the area charge concentration is systematically computed, which is in line with experiments. This comprehensive study not only sheds light on the mechanism underlying the electrocatalysis processes, but also offers a strategy to achieve higher electrocatalytic activity.
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Affiliation(s)
- Zegao Wang
- College of Materials Science and EngineeringSichuan UniversityChengdu610065China
- Interdisciplinary Nanoscience Center (iNANO)Aarhus UniversityDK‐8000Aarhus CDenmark
| | - Hong‐Hui Wu
- Department of ChemistryUniversity of Nebraska‐LincolnNE68588LincolnUSA
- Beijing Advanced Innovation Center for Materials Genome EngineeringState Key Laboratory for Advanced Metals and MaterialsUniversity of Science and Technology BeijingBeijing100083China
| | - Qiang Li
- Interdisciplinary Nanoscience Center (iNANO)Aarhus UniversityDK‐8000Aarhus CDenmark
- Key Laboratory of Colloid and Interface ChemistryMinistry of EducationShandong UniversityJinan250100China
| | - Flemming Besenbacher
- Interdisciplinary Nanoscience Center (iNANO)Aarhus UniversityDK‐8000Aarhus CDenmark
| | - Yanrong Li
- State Key Laboratory of Electronic Thin Films and Integrated DevicesUniversity of Electronic Science and Technology of ChinaChengdu610054China
| | - Xiao Cheng Zeng
- Department of ChemistryUniversity of Nebraska‐LincolnNE68588LincolnUSA
- Department of Chemical and Biomolecular Engineering and Department of Mechanical and Materials EngineeringUniversity of Nebraska‐LincolnNE68588LincolnUSA
| | - Mingdong Dong
- Interdisciplinary Nanoscience Center (iNANO)Aarhus UniversityDK‐8000Aarhus CDenmark
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Huang YJ, Chang R, Zhu QJ. Synthesis and Characterization of a Molecularly Imprinted Polymer of Spermidine and the Exploration of Its Molecular Recognition Properties. Polymers (Basel) 2018; 10:E1389. [PMID: 30961314 PMCID: PMC6401967 DOI: 10.3390/polym10121389] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2018] [Revised: 12/08/2018] [Accepted: 12/12/2018] [Indexed: 11/17/2022] Open
Abstract
Spermidine is a functional ingredient that can extend the lifespan of many foods and indicate meat safety. However, its synthesis and enrichment is expensive and complex. To develop an effective separation material that can offer highly selective recognition of spermidine, we first applied non-covalent molecular imprinting technology using methacrylic acid as a functional monomer, azobisisobutyronitrile as an initiator, and ethylene glycol dimethacrylate as a cross-linker. The adsorption properties of the polymers were analyzed using the Scatchard equation, the Lagergren kinetic equation, and the static distribution coefficient. The optimal polymerization molar ratio of the template molecule spermidine to the functional monomer was 1:4, the maximum adsorption amount was 97.75 μmol/g, and the adsorption equilibrium time was 300 min. The selective experiment showed that the interfering substances tyramine and histamine had selectivity factor α values of 2.01 and 1.78, respectively, indicating that the prepared polymer had good spermidine recognition ability. The density function theory calculations showed that the hydrogen bond strength, steric effect, and product energy caused adsorption and separation differences among the different imprinted polymer complexes.
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Affiliation(s)
- Yu-Jie Huang
- School of Liquor and Food Engineering, Guizhou University, Guiyang 550025, China.
- College of Food Safety, Guizhou Medical University, Guiyang 550025, China.
| | - Rui Chang
- School of Liquor and Food Engineering, Guizhou University, Guiyang 550025, China.
| | - Qiu-Jin Zhu
- School of Liquor and Food Engineering, Guizhou University, Guiyang 550025, China.
- Key Laboratory of Agricultural and Animal Products Store and Processing of Guizhou Province, Guiyang, 550025, China.
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Karunagaran S, Kavitha R, Vadivelu M, Lee KW, Meganathan C. Insight Mechanism of the Selective Lanosterol Synthase Inhibitor: Molecular Modeling, Docking and Density Functional Theory Approaches. Curr Comput Aided Drug Des 2018; 13:275-293. [PMID: 28462697 DOI: 10.2174/1573409913666170426153509] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2016] [Revised: 02/03/2017] [Accepted: 02/03/2017] [Indexed: 11/22/2022]
Abstract
BACKGROUND Lanosterol synthase (Oxidosqualene cyclase) is an enzyme, which plays a central role in cholesterol and sterols biosynthesis. Lanosterol synthase drugs are used to lower the level of cholesterol in the blood and treat wide variety of diseases like atherosclerosis, coronary heart diseases etc. OBJECTIVE There is a great interest in the identification of drugs that target this enzyme for anticholesteraemic agent using in silico tools. METHODS Ligand based pharmacophore model was developed using Discovery Studio 2.5. The best model was used as a tool to retrieve suitable molecule for Lanosterol synthase inhibitor from commercial database and Virtual screening of large commercially available databases to retrieve the best mole of Hypo1 using. Molecular docking was done using three different tools named as GOLD, GLIDE and AUTODOCK 4.0. Density functional theory approach and Density of State spectrum were carried out using Gaussian 09 and GAUSS SUM 3.0. Contribution of these methods in the selection of anticholesteraemic compounds has been discussed. RESULTS The best pharmacophore model was used to screen the commercial database. Totally 8 compounds were showed with the best orientation, binding mode and binging energy in the docking analyses. The orbital energies such as HOMO, LUMO and DOS spectrum for 8 hit compounds showed the energy gap that results in charge transfer and stability in the active site region. The results showed that our 8 potent leads could serve for further findings. CONCLUSION In silico approaches, our 8 hit compounds could serve as the better understanding to design the novel lanosterol synthase inhibitors as anticholesteraemic activity.
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Affiliation(s)
- Subramanian Karunagaran
- Department of Physics, G.K.M. College of Engineering & Technology, Alapakkam, Mappedu Road, Perungalathur, Tamil Nadu 600 063. India
| | - Rengarajan Kavitha
- Department of Physics, Sri Ramanujar Engineering College, Kolapakkam, Vandalur 600 048, Tamil Nadu. India
| | - Muthu Vadivelu
- Department of Physics, G.K.M. College of Engineering & Technology, Alapakkam, Mappedu Road, Perungalathur, Tamil Nadu 600 063. India
| | - Keun Woo Lee
- Division of Applied Life Science (BK21 Program), Systems and Synthetic Agrobiotech Center (SSAC), Plant Molecular Biology and Biotechnology Research Center (PMBBRC), Research Institute of Natural Science (RINS), Gyeongsang National University (GNU), 501 Jinju-daero, Gazha-dong, Jinju 660-701. Korea
| | - Chandrasekaran Meganathan
- Department of Physics, G.K.M. College of Engineering & Technology, Alapakkam, Mappedu Road, Perungalathur, Tamil Nadu 600 063. India
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Yin K, Huang S, Chen X, Wang X, Kong J, Chen Y, Xue J. Generating Sub-nanometer Pores in Single-Layer MoS 2 by Heavy-Ion Bombardment for Gas Separation: A Theoretical Perspective. ACS Appl Mater Interfaces 2018; 10:28909-28917. [PMID: 30062872 DOI: 10.1021/acsami.8b10569] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Single-layer molybdenum disulfide (MoS2) filters with nanometer-size pores have attracted great attention recently due to their promising performance for membrane separation. Generating nanopores in MoS2 controllably, however, is still a challenging task, which greatly limits the real application of MoS2 filters. In this work, the pore forming process in single-layer MoS2 by heavy-ion bombardment was investigated in detail using molecular dynamics simulations. We found that pores with sub-nanometer size (0.6-1.2 nm) can be created in the MoS2 sheet by single-ion bombardment, with a probability as high as 0.8 pores per incident ion. The size and shape of the nanopore can be tuned controllably by adjusting bombardment parameters. Furthermore, the performance of the MoS2 filter with these sub-nanometer-size pores for separation of He, Ne, H2, Ar, and Kr gases was evaluated by density functional theory-based first-principles calculations. The MoS2 filter was found to show much higher selectivity for separating H2/He and He/Ne than that reported for graphene and other membranes. Such high selectivity was attributed to the interaction between gases and the charged edge of pores in MoS2. Our results suggest the potential application of ion beam technology in single-layer MoS2 for membrane separation.
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Affiliation(s)
- Kedi Yin
- State Key Laboratory of Nuclear Physics and Technology, School of Physics, CAPT, HEDPS, and IFSA Collaborative Innovation Center of MoE , Peking University , Beijing 100871 , China
- Guangzhou Key Laboratory for Surface Chemistry of Energy Materials, New Energy Research Institute, School of Environment and Energy , South China University of Technology , Guangzhou , Guangdong 510006 , China
| | - Shengxi Huang
- Department of Electrical Engineering and Computer Science , Massachusetts Institute of Technology , Cambridge , Massachusetts 02139 , United States
- Department of Electrical Engineering , The Pennsylvania State University , University Park , Pennsylvania 16802 , United States
| | - Xiaofei Chen
- State Key Laboratory of Nuclear Physics and Technology, School of Physics, CAPT, HEDPS, and IFSA Collaborative Innovation Center of MoE , Peking University , Beijing 100871 , China
| | - Xinwei Wang
- School of Advanced Materials, Shenzhen Graduate School , Peking University , Shenzhen 518055 , China
| | - Jing Kong
- Department of Electrical Engineering and Computer Science , Massachusetts Institute of Technology , Cambridge , Massachusetts 02139 , United States
| | - Yan Chen
- Guangzhou Key Laboratory for Surface Chemistry of Energy Materials, New Energy Research Institute, School of Environment and Energy , South China University of Technology , Guangzhou , Guangdong 510006 , China
| | - Jianming Xue
- State Key Laboratory of Nuclear Physics and Technology, School of Physics, CAPT, HEDPS, and IFSA Collaborative Innovation Center of MoE , Peking University , Beijing 100871 , China
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27
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Xu GL, Xiao L, Sheng T, Liu J, Hu YX, Ma T, Amine R, Xie Y, Zhang X, Liu Y, Ren Y, Sun CJ, Heald SM, Kovacevic J, Sehlleier YH, Schulz C, Mattis WL, Sun SG, Wiggers H, Chen Z, Amine K. Electrostatic Self-Assembly Enabling Integrated Bulk and Interfacial Sodium Storage in 3D Titania-Graphene Hybrid. Nano Lett 2018; 18:336-346. [PMID: 29240435 DOI: 10.1021/acs.nanolett.7b04193] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Room-temperature sodium-ion batteries have attracted increased attention for energy storage due to the natural abundance of sodium. However, it remains a huge challenge to develop versatile electrode materials with favorable properties, which requires smart structure design and good mechanistic understanding. Herein, we reported a general and scalable approach to synthesize three-dimensional (3D) titania-graphene hybrid via electrostatic-interaction-induced self-assembly. Synchrotron X-ray probe, transmission electron microscopy, and computational modeling revealed that the strong interaction between titania and graphene through comparably strong van der Waals forces not only facilitates bulk Na+ intercalation but also enhances the interfacial sodium storage. As a result, the titania-graphene hybrid exhibits exceptional long-term cycle stability up to 5000 cycles, and ultrahigh rate capability up to 20 C for sodium storage. Furthermore, density function theory calculation indicated that the interfacial Li+, K+, Mg2+, and Al3+ storage can be enhanced as well. The proposed general strategy opens up new avenues to create versatile materials for advanced battery systems.
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Affiliation(s)
- Gui-Liang Xu
- Chemical Sciences and Engineering Division, Argonne National Laboratory , 9700 S Cass Avenue, Lemont, Illinois 60439, United States
| | - Lisong Xiao
- Center for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen , Duisburg 47048, Germany
| | - Tian Sheng
- Collaborative Innovation Center of Chemistry for Energy Materials, State Key Laboratory Physical Chemistry of Solid Surfaces, Department of Chemistry, Xiamen University , Xiamen 361005, China
| | - Jianzhao Liu
- Chemical Sciences and Engineering Division, Argonne National Laboratory , 9700 S Cass Avenue, Lemont, Illinois 60439, United States
| | - Yi-Xin Hu
- Chemical Sciences and Engineering Division, Argonne National Laboratory , 9700 S Cass Avenue, Lemont, Illinois 60439, United States
- Department of Chemistry, University of North Carolina , Chapel Hill, North Carolina 27599, United States
| | - Tianyuan Ma
- Chemical Sciences and Engineering Division, Argonne National Laboratory , 9700 S Cass Avenue, Lemont, Illinois 60439, United States
| | - Rachid Amine
- Materials Science Division, Argonne National Laboratory , 9700 S Cass Avenue, Lemont, Illinois 60439, United States
| | - Yingying Xie
- Chemical Sciences and Engineering Division, Argonne National Laboratory , 9700 S Cass Avenue, Lemont, Illinois 60439, United States
| | - Xiaoyi Zhang
- X-ray Science Division, Advanced Photon Source, Argonne National Laboratory , 9700 S Cass Avenue, Lemont, Illinois 60439, United States
| | - Yuzi Liu
- Nanoscience and Technology Division, Argonne National Laboratory , 9700 South Cass Avenue, Argonne, Illinois 60439, United States
| | - Yang Ren
- X-ray Science Division, Advanced Photon Source, Argonne National Laboratory , 9700 S Cass Avenue, Lemont, Illinois 60439, United States
| | - Cheng-Jun Sun
- X-ray Science Division, Advanced Photon Source, Argonne National Laboratory , 9700 S Cass Avenue, Lemont, Illinois 60439, United States
| | - Steve M Heald
- X-ray Science Division, Advanced Photon Source, Argonne National Laboratory , 9700 S Cass Avenue, Lemont, Illinois 60439, United States
| | - Jasmina Kovacevic
- Center for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen , Duisburg 47048, Germany
| | - Yee Hwa Sehlleier
- Center for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen , Duisburg 47048, Germany
| | - Christof Schulz
- Center for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen , Duisburg 47048, Germany
| | - Wenjuan Liu Mattis
- Microvast Power Solutions , 12603 Southwest Freeway, Stafford, Texas 77477, United States
| | - Shi-Gang Sun
- Collaborative Innovation Center of Chemistry for Energy Materials, State Key Laboratory Physical Chemistry of Solid Surfaces, Department of Chemistry, Xiamen University , Xiamen 361005, China
| | - Hartmut Wiggers
- Center for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen , Duisburg 47048, Germany
| | - Zonghai Chen
- Chemical Sciences and Engineering Division, Argonne National Laboratory , 9700 S Cass Avenue, Lemont, Illinois 60439, United States
| | - Khalil Amine
- Chemical Sciences and Engineering Division, Argonne National Laboratory , 9700 S Cass Avenue, Lemont, Illinois 60439, United States
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Ghule BG, Shaikh S, Ekar SU, Nakate UT, Gunturu KC, Shinde NM, Naushad M, Kim KH, O'Dwyer C, Mane RS. Natural Carbonized Sugar as a Low-Temperature Ammonia Sensor Material: Experimental, Theoretical, and Computational Studies. ACS Appl Mater Interfaces 2017; 9:43051-43060. [PMID: 29152968 DOI: 10.1021/acsami.7b13122] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Carbonized sugar (CS) has been synthesized via microwave-assisted carbonization of market-quality tabletop sugar bearing in mind the advantages of this synthesis method, such as being useful, cost-effective, and eco-friendly. The as-prepared CS has been characterized for its morphology, phase purity, type of porosity, pore-size distribution, and so on. The gas-sensing properties of CS for various oxidizing and reducing gases are demonstrated at ambient temperature, where we observe good selectivity toward liquid ammonia among other gases. The highest ammonia response (50%) of a CS-based sensor was noted at 80 °C for 100 ppm concentration. The response and recovery times of the CS sensor are 180 and 216 s, respectively. This unveiling ammonia-sensing study is explored through a plausible theoretical mechanism, which is further well-supported by computational modeling performed using density function theory. The effect of relative humidity on the CS sensor has also been studied at ambient temperature, which demonstrated that the minimum and maximum (20-100%) relative humidity values revealed 16 and 62% response, respectively.
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Affiliation(s)
| | | | | | | | | | - Nanasaheb M Shinde
- Department of Materials Science and Engineering, Pusan National University , San 30 Jangjeon-dong, Geumjeong-gu, Busan 609-735, Republic of Korea
| | - Mu Naushad
- Department of Chemistry, College of Science, King Saud University , Building-5, Riyadh 11451, Saudi Arabia
| | - Kwang Ho Kim
- National Core Research for Hybrid Materials Solution, Pusan National University , Busan 600-735, Republic of Korea
| | - Colm O'Dwyer
- School of Chemistry, University College Cork , Cork T12 YN60, Ireland
| | - Rajaram S Mane
- National Core Research for Hybrid Materials Solution, Pusan National University , Busan 600-735, Republic of Korea
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Patil M, Choudhari AS, Pandita S, Islam MA, Raina P, Kaul-Ghanekar R. Cinnamaldehyde, Cinnamic Acid, and Cinnamyl Alcohol, the Bioactives of Cinnamomum cassia Exhibit HDAC8 Inhibitory Activity: An In vitro and In silico Study. Pharmacogn Mag 2017; 13:S645-S651. [PMID: 29142427 PMCID: PMC5669110 DOI: 10.4103/pm.pm_389_16] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2016] [Revised: 11/08/2016] [Indexed: 01/18/2023] Open
Abstract
Background The altered expression of histone deacetylase family member 8 (HDAC8) has been found to be linked with various cancers, thereby making its selective inhibition a potential strategy in cancer therapy. Recently, plant secondary metabolites, particularly phenolic compounds, have been shown to possess HDAC inhibitory activity. Objective In the present work, we have evaluated the potential of cinnamaldehyde (CAL), cinnamic acid (CA), and cinnamyl alcohol (CALC) (bioactives of Cinnamomum) as well as aqueous cinnamon extract (ACE), to inhibit HDAC8 activity in vitro and in silico. Materials and Methods HDAC8 inhibitory activity of ACE and cinnamon bioactives was determined in vitro using HDAC8 inhibitor screening kit. Trichostatin A (TSA), a well-known anti-cancer agent and HDAC inhibitor, was used as a positive control. In silico studies included molecular descriptor Analysis molecular docking absorption, distribution, metabolism, excretion, and toxicity prediction, density function theory calculation and synthetic accessibility program. Results Pharmacoinformatics studies implicated that ACE and its Bioactives (CAL, CA, and CALC) exhibited comparable activity with that of TSA. The highest occupied molecular orbitals and lowest unoccupied molecular orbitals along with binding energy of cinnamon bioactives were comparable with that of TSA. Molecular docking results suggested that all the ligands maintained two hydrogen bond interactions within the active site of HDAC8. Finally, the synthetic accessibility values showed that cinnamon bioactives were easy to synthesize compared to TSA. Conclusion It was evident from both the experimental and computational data that cinnamon bioactives exhibited significant HDAC8 inhibitory activity, thereby suggesting their potential therapeutic implications against cancer. SUMMARY Pharmacoinformatics studies revealed that cinnamon bioactives bound to the active site of HDAC8 enzyme in a way similar to that of TSAThe molecular descriptors of cinnamon compounds successfully correlated with TSA values. The binding interactions and energies were also found to be close to TSASynthetic accessibility values showed that cinnamon bioactives were easy to synthesize compared to TSA. Abbreviations used: ACE: Aqueous Cinnamon Extract; DFT: Density Function Theory; CAL: Cinnamaldehyde; CA: Cinnamic Acid; CALC: Cinnamyl Alcohol; MW: Molecular Weight; ROTBs: Rotatable Bonds; ROF: Lipinski's Rule of Five; TSA: Trichostatin A; PDB: Protein Data Bank; RMSD: Root Mean Square Deviation; HBA: Hydrogen Bond Acceptor; HBD: Hydrogen Bond Donor; ADMET: Absorption, Distribution, Metabolism, Excretion and Toxicity; FO: Frontier Orbital; HOMOs: Highest Occupied Molecular Orbitals; LUMOs: Lowest Unoccupied Molecular Orbitals; BE: Binding Energy.
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Affiliation(s)
- Mangesh Patil
- NBN Sinhgad Technical Institutes Campus, NBN Sinhgad School of Computer Studies, Pune, Maharashtra, India
| | - Amit S Choudhari
- Cancer Research Lab, Interactive Research School for Health Affairs, Bharati Vidyapeeth Deemed University, Pune-Satara Road, Pune, Maharashtra, India
| | - Savita Pandita
- Cancer Research Lab, Interactive Research School for Health Affairs, Bharati Vidyapeeth Deemed University, Pune-Satara Road, Pune, Maharashtra, India
| | - Md Ataul Islam
- Department of Chemical Pathology, Faculty of Health Sciences, Tshwane Academic Division of the National Health Laboratory Service, University of Pretoria, Pretoria, South Africa
| | - Prerna Raina
- Cancer Research Lab, Interactive Research School for Health Affairs, Bharati Vidyapeeth Deemed University, Pune-Satara Road, Pune, Maharashtra, India
| | - Ruchika Kaul-Ghanekar
- Cancer Research Lab, Interactive Research School for Health Affairs, Bharati Vidyapeeth Deemed University, Pune-Satara Road, Pune, Maharashtra, India
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30
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Teng X, Zhan C, Bai Y, Ma L, Liu Q, Wu C, Wu F, Yang Y, Lu J, Amine K. In Situ Analysis of Gas Generation in Lithium-Ion Batteries with Different Carbonate-Based Electrolytes. ACS Appl Mater Interfaces 2015; 7:22751-22755. [PMID: 26417916 DOI: 10.1021/acsami.5b08399] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Gas generation in lithium-ion batteries is one of the critical issues limiting their safety performance and lifetime. In this work, a set of 900 mAh pouch cells were applied to systematically compare the composition of gases generated from a serial of carbonate-based composite electrolytes, using a self-designed gas analyzing system. Among electrolytes used in this work, the composite γ-butyrolactone/ethyl methyl carbonate (GBL/EMC) exhibited remarkably less gassing because of the electrochemical stability of the GBL, which makes it a promising electrolyte for battery with advanced safety and lifetime.
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Affiliation(s)
- Xin Teng
- Beijing Key Laboratory of Environment Science and Engineering, School of Materials Science and Engineering, Beijing Institute of Technology , Beijing 100081, China
| | | | - Ying Bai
- Beijing Key Laboratory of Environment Science and Engineering, School of Materials Science and Engineering, Beijing Institute of Technology , Beijing 100081, China
| | | | - Qi Liu
- Beijing Key Laboratory of Environment Science and Engineering, School of Materials Science and Engineering, Beijing Institute of Technology , Beijing 100081, China
| | - Chuan Wu
- Beijing Key Laboratory of Environment Science and Engineering, School of Materials Science and Engineering, Beijing Institute of Technology , Beijing 100081, China
- Collaborative Innovation Center of Electric Vehicles in Beijing , Beijing 100081, China
| | - Feng Wu
- Beijing Key Laboratory of Environment Science and Engineering, School of Materials Science and Engineering, Beijing Institute of Technology , Beijing 100081, China
- Collaborative Innovation Center of Electric Vehicles in Beijing , Beijing 100081, China
| | - Yusheng Yang
- Beijing Key Laboratory of Environment Science and Engineering, School of Materials Science and Engineering, Beijing Institute of Technology , Beijing 100081, China
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31
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Kim H, Man HB, Saha B, Kopacz AM, Lee OS, Schatz GC, Ho D, Liu WK. Multiscale Simulation as a Framework for the Enhanced Design of Nanodiamond-Polyethylenimine-based Gene Delivery. J Phys Chem Lett 2012; 3:3791-3797. [PMID: 23304428 PMCID: PMC3538166 DOI: 10.1021/jz301756e] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
Nanodiamonds (NDs) are emerging carbon platforms with promise as gene/drug delivery vectors for cancer therapy. Specifically, NDs functionalized with the polymer polyethylenimine (PEI) can transfect small interfering RNAs (siRNA) in vitro with high efficiency and low cytotoxicity. Here we present a modeling framework to accurately guide the design of ND-PEI gene platforms and elucidate binding mechanisms between ND, PEI, and siRNA. This is among the first ND simulations to comprehensively account for ND size, charge distribution, surface functionalization, and graphitization. The simulation results are compared with our experimental results both for PEI loading onto NDs and for siRNA (C-myc) loading onto ND-PEI for various mixing ratios. Remarkably, the model is able to predict loading trends and saturation limits for PEI and siRNA, while confirming the essential role of ND surface functionalization in mediating ND-PEI interactions. These results demonstrate that this robust framework can be a powerful tool in ND platform development, with the capacity to realistically treat other nanoparticle systems.
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Affiliation(s)
- Hansung Kim
- Department of Mechanical Engineering, Robert R. McCormick School of Engineering and Applied Science, Northwestern University, Evanston, Illinois 60208 USA
- Address correspondence to: , ,
| | - Han Bin Man
- Department of Mechanical Engineering, Robert R. McCormick School of Engineering and Applied Science, Northwestern University, Evanston, Illinois 60208 USA
| | - Biswajit Saha
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208 USA
| | - Adrian M. Kopacz
- Department of Mechanical Engineering, Robert R. McCormick School of Engineering and Applied Science, Northwestern University, Evanston, Illinois 60208 USA
| | - One-Sun Lee
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208 USA
| | - George C. Schatz
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208 USA
- Address correspondence to: , ,
| | - Dean Ho
- Division of Oral Biology and Medicine, Division of Advanced Prosthodontics, The Jane and Jerry Weintraub Center for Reconstructive Biotechnology, UCLA School of Dentistry, California NanoSystems Institute, and Jonsson Comprehensive Cancer Center, University of California, Los Angeles, Los Angeles, California 90095, USA
- Address correspondence to: , ,
| | - Wing Kam Liu
- Department of Mechanical Engineering, Robert R. McCormick School of Engineering and Applied Science, Northwestern University, Evanston, Illinois 60208 USA
- Distinguished World Class University Professor, School of Mechanical Engineering, Sungkyunkwan University, Suwon, Kyonggi-do, Republic of Korea
- Address correspondence to: , ,
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32
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Abstract
We have studied the dynamic relationship between acetone and bridge-bonded oxygen (Ob) vacancy (VO) defect sites on the TiO2(110)-1 × 1 surface using scanning tunneling microscopy (STM) and density function theory (DFT) calculations. We report an adsorbate-assisted VO diffusion mechanism. The STM images taken at 300 K show that acetone preferably adsorbs on the VO site and is mobile. The sequential isothermal STM images directly show that the mobile acetone effectively migrates the position of VO by a combination of two acetone diffusion channels: one is the diffusion along the Ob row and moving as an alkyl group, which heals the initial VO; another is the diffusion from the Ob row to the five-coordinated Ti(4+) row and then moving along the Ti(4+) row as an acetone, which leaves a VO behind. The calculated acetone diffusion barriers for the two channels are comparable and agree with experimental results.
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Affiliation(s)
- Yaobiao Xia
- †Department of Physics, Baylor University, Waco, Texas 76798, United States
| | - Bo Zhang
- †Department of Physics, Baylor University, Waco, Texas 76798, United States
| | - Jingyun Ye
- §Department of Chemistry and Biochemistry, Southern Illinois University, Carbondale, Illinois 62901, United States
| | - Qingfeng Ge
- §Department of Chemistry and Biochemistry, Southern Illinois University, Carbondale, Illinois 62901, United States
| | - Zhenrong Zhang
- †Department of Physics, Baylor University, Waco, Texas 76798, United States
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Sakkiah S, Meganathan C, Sohn YS, Namadevan S, Lee KW. Identification of important chemical features of 11β-hydroxysteroid dehydrogenase type1 inhibitors: application of ligand based virtual screening and density functional theory. Int J Mol Sci. 2012;13:5138-5162. [PMID: 22606035 PMCID: PMC3344271 DOI: 10.3390/ijms13045138] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2012] [Revised: 03/19/2012] [Accepted: 04/05/2012] [Indexed: 12/12/2022] Open
Abstract
11β-Hydroxysteroid dehydrogenase type1 (11βHSD1) regulates the conversion from inactive cortisone to active cortisol. Increased cortisol results in diabetes, hence quelling the activity of 11βHSD1 has been thought of as an effective approach for the treatment of diabetes. Quantitative hypotheses were developed and validated to identify the critical chemical features with reliable geometric constraints that contribute to the inhibition of 11βHSD1 function. The best hypothesis, Hypo1, which contains one-HBA; one-Hy-Ali, and two-RA features, was validated using Fischer’s randomization method, a test and a decoy set. The well validated, Hypo1, was used as 3D query to perform a virtual screening of three different chemical databases. Compounds selected by Hypo1 in the virtual screening were filtered by applying Lipinski’s rule of five, ADMET, and molecular docking. Finally, five hit compounds were selected as virtual novel hit molecules for 11βHSD1 based on their electronic properties calculated by Density functional theory.
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