1
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Kumar N. Uranyl (UO 22+) structuring and dynamics at graphene/electrolyte interface. Phys Chem Chem Phys 2024; 26:20799-20806. [PMID: 38958742 DOI: 10.1039/d4cp02108h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/04/2024]
Abstract
The physicochemical phenomena at the solid/electrolyte interfaces govern various industrial processes ranging from energy generation, storage, and catalysis to chemical separations and purification. Adsorption-based solid/liquid extraction methods are promising for the selective and rapid separation of nuclear (such as uranium) and other critical materials. In this study, we quantified the adsorption, complexation, and dynamics of UO22+ ions on the graphene surface in various electrolyte media (LiNO3, NaNO3 and CsNO3) using all-atom molecular dynamics simulations, in combination with network theory based subensemble analysis, enhanced sampling, and temporal analysis. We observe that the choice of background electrolyte impacts the propensity of UO22+ adsorption on the graphene surface, with LiNO3 being the most favorable at both low and high uranyl-nitrate concentrations. Even though UO22+ primarily retained its coordination with water and interacted via the outer-sphere mechanism with graphene, the interfacial segregation of NO3- increased the number of contact ion pairs (CIPs) between UO22+ and NO3- ions, and the residence times of UO22+ within the interfacial region. This study provides a fundamental understanding of the structure and dynamics of UO22+ on the solid surface necessary to design advanced adsorption-based separation methods for energy-relevant materials.
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Affiliation(s)
- Nitesh Kumar
- Department of Chemistry, Washington State University, Pullman, Washington 99163, USA.
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2
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Tarrat N, Schön JC, Cortés J. Dependence of lactose adsorption on the exposed crystal facets of metals: a comparative study of gold, silver and copper. Phys Chem Chem Phys 2024; 26:21134-21146. [PMID: 39069955 DOI: 10.1039/d4cp01559b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/30/2024]
Abstract
In this theoretical work, we investigated the adsorption of a lactose molecule on metal-based surfaces, with a focus on the influence of the nature of the metal and of the type of exposed crystal facet on the adsorbed structures and energetics. More precisely, we considered three flat crystallographic facets of three face-centered cubic metals (gold, silver, and copper). For the global exploration of the energy landscape, we employed a multi-stage procedure where high-throughput searches, using a stochastic method that performs global optimization by iterating local searches, are followed by a refinement of the most probable adsorption conformations of the molecule at the ab initio level. We predicted the optimal conformation of lactose on each of the nine metal-surface combinations, classified the many low-energy minima into possible adsorption modes, and analyzed the structural, electronic and energetic aspects of the lactose molecule on the surface, as well as their dependence on the type of metal and exposed crystal facet. We observed structural similarities between the various minimum-energy conformations of lactose in vacuum and on the surface, a rough correlation between adsorption and interaction energies of the molecule, and a small charge transfer between molecule and surface whose direction is metal-dependent. During adsorption, an electronic reorganization occurs at the metal-molecule interface only, without affecting the vacuum-pointing atoms of the lactose molecule. For all types of surfaces, lactose exhibits the weakest adsorption on silver substrates, while for each coinage metal the adsorption is strongest on the (110) crystal facet. This study demonstrates that the control of exposed facets can allow to modulate the interaction between metals and small saccharides.
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Affiliation(s)
- Nathalie Tarrat
- CEMES, Université de Toulouse, CNRS, 29 rue Jeanne Marvig, 31055 Toulouse, France.
| | - J Christian Schön
- Max Planck Institute for Solid State Research, Heisenbergstr. 1, 70569 Stuttgart, Germany
| | - Juan Cortés
- LAAS-CNRS, Université de Toulouse, CNRS, 31400 Toulouse, France
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3
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Cheng T, Meng Y, Luo M, Xian J, Luo W, Wang W, Yue F, Ho JC, Yu C, Chu J. Advancements and Challenges in the Integration of Indium Arsenide and Van der Waals Heterostructures. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024:e2403129. [PMID: 39030967 DOI: 10.1002/smll.202403129] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/18/2024] [Revised: 06/17/2024] [Indexed: 07/22/2024]
Abstract
The strategic integration of low-dimensional InAs-based materials and emerging van der Waals systems is advancing in various scientific fields, including electronics, optics, and magnetics. With their unique properties, these InAs-based van der Waals materials and devices promise further miniaturization of semiconductor devices in line with Moore's Law. However, progress in this area lags behind other 2D materials like graphene and boron nitride. Challenges include synthesizing pure crystalline phase InAs nanostructures and single-atomic-layer 2D InAs films, both vital for advanced van der Waals heterostructures. Also, diverse surface state effects on InAs-based van der Waals devices complicate their performance evaluation. This review discusses the experimental advances in the van der Waals epitaxy of InAs-based materials and the working principles of InAs-based van der Waals devices. Theoretical achievements in understanding and guiding the design of InAs-based van der Waals systems are highlighted. Focusing on advancing novel selective area growth and remote epitaxy, exploring multi-functional applications, and incorporating deep learning into first-principles calculations are proposed. These initiatives aim to overcome existing bottlenecks and accelerate transformative advancements in integrating InAs and van der Waals heterostructures.
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Affiliation(s)
- Tiantian Cheng
- School of Microelectronics and School of Integrated Circuits, School of Information Science and Technology, Nantong University, Nantong, 226019, P. R. China
| | - Yuxin Meng
- School of Microelectronics and School of Integrated Circuits, School of Information Science and Technology, Nantong University, Nantong, 226019, P. R. China
| | - Man Luo
- School of Microelectronics and School of Integrated Circuits, School of Information Science and Technology, Nantong University, Nantong, 226019, P. R. China
- Department of Materials Science and Engineering and State Key Laboratory of Terahertz and Millimeter Waves, City University of Hong Kong, Hong Kong SAR, 999077, P. R. China
| | - Jiachi Xian
- School of Microelectronics and School of Integrated Circuits, School of Information Science and Technology, Nantong University, Nantong, 226019, P. R. China
| | - Wenjin Luo
- Department of Physics and JILA, University of Colorado, Boulder, CO, 80309, USA
| | - Weijun Wang
- Department of Materials Science and Engineering and State Key Laboratory of Terahertz and Millimeter Waves, City University of Hong Kong, Hong Kong SAR, 999077, P. R. China
| | - Fangyu Yue
- School of Physics and Electronic Science, East China Normal University, Shanghai, 200241, P. R. China
| | - Johnny C Ho
- Department of Materials Science and Engineering and State Key Laboratory of Terahertz and Millimeter Waves, City University of Hong Kong, Hong Kong SAR, 999077, P. R. China
| | - Chenhui Yu
- School of Microelectronics and School of Integrated Circuits, School of Information Science and Technology, Nantong University, Nantong, 226019, P. R. China
| | - Junhao Chu
- School of Physics and Electronic Science, East China Normal University, Shanghai, 200241, P. R. China
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4
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Mäkinen M, Weckman T, Laasonen K. Modelling the growth reaction pathways of zincone ALD/MLD hybrid thin films: a DFT study. Phys Chem Chem Phys 2024; 26:17334-17344. [PMID: 38860485 DOI: 10.1039/d4cp00249k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/12/2024]
Abstract
ALD/MLD hybrid thin films can be fabricated by combining atomic layer deposition (ALD) and molecular layer deposition (MLD). Even though this deposition method has been extensively used experimentally, the computational work required to acquire the reaction paths during the thin film deposition process is still in dire demand. We investigated hybrid thin films consisting of diethyl zinc and either 4-aminophenol or hydroquinone using both gas-phase and surface reactions to gain extensive knowledge of the complex phenomena occurring during the process of hybrid thin film deposition. We used density functional theory (DFT) to obtain the activation energies of these kinetic-dependent deposition processes. Different processes of ethyl ligand removal as ethane were discovered, and we found that the hydroxyl group of 4-aminophenol was more reactive than the amino group in the migration of hydrogen to an ethyl ligand within a complicated branching reaction chain.
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Affiliation(s)
- Mario Mäkinen
- Department of Chemistry and Materials Science, School of Chemical Engineering, Aalto University, Kemistintie 1, 02150, Espoo, Finland.
| | - Timo Weckman
- Department of Chemistry, University of Jyväskylä, Survontie 9 B, 40500, Jyväskylä, Finland
| | - Kari Laasonen
- Department of Chemistry and Materials Science, School of Chemical Engineering, Aalto University, Kemistintie 1, 02150, Espoo, Finland.
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5
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Donnecke S, Paul M, Williams PJH, Chan S, Tse V, Sachdeva J, Oliver AG, McIndoe JS, Paci I. Mechanistic study of the atomic layer deposition of cobalt: a combined mass spectrometric and computational approach. Phys Chem Chem Phys 2024; 26:14448-14455. [PMID: 38713487 DOI: 10.1039/d4cp00093e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/08/2024]
Abstract
Cobaltcarbonyl-tert-butylacetylene (CCTBA) is a conventional precursor for the selective atomic layer deposition of Co onto silicon surfaces. However, a limited understanding of the deposition mechanism of such cobalt precursors curbs rational improvements on their design for increased efficiency and tuneable selectivity. The impact of using a less reactive internal alkyne instead of a terminal alkyne was investigated using experimental and computational methods. Using electrospray-ionization mass spectrometry, the formation of CCTBA analogs and their gas phase decomposition pathways were studied. Decomposition experiments show very similar decomposition pathways between the two complexes. The internal alkyne dissociates from the Co complex at slightly lower energies than the terminal alkyne, suggesting that an internal alkynyl ligand may be more suited to low temperature ALD. In addition, transition state calculations using the nudged elastic band method confirm an increased reaction barrier between the internal alkyne and the Si-H surface bonds on Si(111). These results suggests that using a less reactive internal alkyne will result in fewer embedded carbon impurities during deposition onto Si wafers. DFT calculations using the PBE functional and periodic boundary conditions also predict increased surface binding with the metal centers of the internal alkynyl complex.
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Affiliation(s)
- Sofia Donnecke
- Department of Chemistry, University of Victoria, Victoria, V8P 5C2, Canada.
| | - Mathias Paul
- Department of Chemistry, University of Victoria, Victoria, V8P 5C2, Canada.
| | - Peter J H Williams
- Department of Chemistry, University of Victoria, Victoria, V8P 5C2, Canada.
| | - Serena Chan
- Department of Chemistry, University of Victoria, Victoria, V8P 5C2, Canada.
| | - Veronica Tse
- Department of Chemistry, University of Victoria, Victoria, V8P 5C2, Canada.
| | - Jigyasa Sachdeva
- Department of Chemistry, University of Victoria, Victoria, V8P 5C2, Canada.
| | - Allen G Oliver
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN 46556, USA
| | - J Scott McIndoe
- Department of Chemistry, University of Victoria, Victoria, V8P 5C2, Canada.
| | - Irina Paci
- Department of Chemistry, University of Victoria, Victoria, V8P 5C2, Canada.
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6
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Zhao Y, Shen G, Wang Y, Hao X, Li H. Controlling the Size of Hydrotalcite Particles and Its Impact on the Thermal Insulation Capabilities of Coatings. MATERIALS (BASEL, SWITZERLAND) 2024; 17:2046. [PMID: 38730853 PMCID: PMC11084319 DOI: 10.3390/ma17092046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/12/2024] [Revised: 04/21/2024] [Accepted: 04/23/2024] [Indexed: 05/13/2024]
Abstract
This study focuses on the development of high-performance insulation materials to address the critical issue of reducing building energy consumption. Magnesium-aluminum layered double hydroxides (LDHs), known for their distinctive layered structure featuring positively charged brucite-like layers and an interlayer space, have been identified as promising candidates for insulation applications. Building upon previous research, which demonstrated the enhanced thermal insulation properties of methyl trimethoxysilane (MTS) functionalized LDHs synthesized through a one-step in situ hydrothermal method, this work delves into the systematic exploration of particle size regulation and its consequential effects on the thermal insulation performance of coatings. Our findings indicate a direct correlation between the dosage of MTS and the particle size of LDHs, with an optimal dosage of 4 wt% MTS yielding LDHs that exhibit a tightly interconnected hydrotalcite lamellar structure. This specific modification resulted in the most significant improvement in thermal insulation, achieving a temperature difference of approximately 25.5 °C. Furthermore, to gain a deeper understanding of the thermal insulation mechanism of MTS-modified LDHs, we conducted a thorough characterization of their UV-visible diffuse reflectance and thermal conductivity. This research contributes to the advancement of LDH-based materials for use in thermal insulation applications, offering a sustainable solution to energy conservation in the built environment.
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Affiliation(s)
- Yanhua Zhao
- Guangdong Provincial Key Laboratory of Environmental Health and Land Resource, College of Environmental and Chemical Engineering, Zhaoqing University, Zhaoqing 526061, China; (Y.Z.); (Y.W.)
- Zhaoqing Environmental Functional Materials Engineering Technology Center, College of Environmental and Chemical Engineering, Zhaoqing University, Zhaoqing 526061, China
| | - Guanhua Shen
- Guangdong Provincial Key Laboratory of Environmental Health and Land Resource, College of Environmental and Chemical Engineering, Zhaoqing University, Zhaoqing 526061, China; (Y.Z.); (Y.W.)
- Zhaoqing Environmental Functional Materials Engineering Technology Center, College of Environmental and Chemical Engineering, Zhaoqing University, Zhaoqing 526061, China
| | - Yongli Wang
- Guangdong Provincial Key Laboratory of Environmental Health and Land Resource, College of Environmental and Chemical Engineering, Zhaoqing University, Zhaoqing 526061, China; (Y.Z.); (Y.W.)
- Zhaoqing Environmental Functional Materials Engineering Technology Center, College of Environmental and Chemical Engineering, Zhaoqing University, Zhaoqing 526061, China
| | - Xiangying Hao
- Guangdong Provincial Key Laboratory of Environmental Health and Land Resource, College of Environmental and Chemical Engineering, Zhaoqing University, Zhaoqing 526061, China; (Y.Z.); (Y.W.)
- Zhaoqing Environmental Functional Materials Engineering Technology Center, College of Environmental and Chemical Engineering, Zhaoqing University, Zhaoqing 526061, China
| | - Huining Li
- Zhaoqing Rivers High-Tech Materials Co., Ltd., Zhaoqing 526061, China;
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7
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Baghai B, Ketabi S. Hydrogen storage efficiency of Fe doped carbon nanotubes: molecular simulation study. RSC Adv 2024; 14:9763-9780. [PMID: 38525065 PMCID: PMC10959165 DOI: 10.1039/d3ra08382a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2023] [Accepted: 03/18/2024] [Indexed: 03/26/2024] Open
Abstract
Given that adsorption is widely regarded as a favorable technique for hydrogen storage, it is appropriate to pursue the development of suitable adsorbent materials for industrial storage. This study aimed to assess the potential of Fe-doped carbon nanotubes (FeCNT) as a remarkable material for hydrogen storage. The structures of pure and Fe-doped CNTs were optimized based on quantum mechanical calculations using density functional theory (DFT) with the Perdew-Burke-Ernzerhof (PBE) method. To gain a comprehensive understanding of the adsorption behavior, Monte Carlo simulation was employed to investigate the adsorption of hydrogen molecules on FeCNT. The study specifically examined the impact of temperature, pressure, and hydrogen mole percentage on the adsorption capacity of FeCNT. The findings indicated that the uptake of hydrogen increased as the pressure increased, and when the pressure exceeded 5 MPa, FeCNT reached a state of near saturation. At room temperature and pressures of 1 and 5 MPa, the hydrogen capacities of FeCNT were determined to be 1.53 and 6.92 wt%, respectively. The radial distribution function diagrams confirmed the formation of a one-layer adsorption phase at pressures below 5 MPa. A comparison of the temperature dependence of hydrogen adsorption between FeCNT and pure CNT confirmed the effectiveness of Fe doping in hydrogen storage up to room temperature. FeCNT exhibited a greater reduction in initial hydrogen capacity at temperatures above room temperature. To evaluate the safety of the system, the use of N2 as a dilution agent was investigated by examining the hydrogen uptake of FeCNT from pure and H2/N2 mixtures at 300 K. The results showed that the addition of N2 to the environment had no significant effect on FeCNT hydrogen storage at pressures below 4 MPa. Furthermore, the study of H2 selectivity from the H2/N2 mixture indicated that FeCNT demonstrated a preference for adsorbing H2 over a wide range of bulk mole fractions at pressures of 4 and 5 MPa, suggesting that these pressures could be considered optimal. Under these conditions, Fe doping can offer an efficient and selective adsorption surface for hydrogen storage.
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Affiliation(s)
- Bita Baghai
- Department of Applied Chemistry, Faculty of Pharmaceutical Chemistry, Tehran Medical Sciences, Islamic Azad University Tehran Iran
| | - Sepideh Ketabi
- Department of Chemistry, Faculty of Pharmaceutical Chemistry, Tehran Medical Sciences, Islamic Azad University Tehran Iran
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8
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Wang C, Yu G, Zhang S, Zhao Y, Chen H, Cheng T, Zhang X. A pressure-induced superhard SiCN 4 compound uncovered by first-principles calculations. Phys Chem Chem Phys 2024; 26:8938-8944. [PMID: 38436105 DOI: 10.1039/d3cp06272d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/05/2024]
Abstract
Silicon-carbon-nitride (Si-C-N) compounds are a family of potential superhard materials with many excellent chemical and physical properties; however, only SiCN, Si2CN4 and SiC2N4 were synthesized. Here, we theoretically report a new SiCN4 compound with P41212, Fdd2 and R3̄ structures by first-principles structural predictions based on the particle swarm optimization algorithm. Pressure-induced structural phase transitions from P41212 to Fdd2, and then to the R3̄ phase were determined at 2 GPa and 249 GPa. By comparing enthalpy differences with 1/3Si3N4 + C + 4/3N2, it was found that these structures tend to decompose at ambient pressure. However, with the increase of pressure, the enthalpy differences of Fdd2 and R3̄ structures turn to be negative and they can be stabilized at a pressure of more than 41 GPa. They are also dynamically stable as no imaginary frequencies were found in their stabilized pressure ranges. The calculated band gap is 4.37 eV for P41212, 3.72 eV for Fdd2 and 3.81 eV for the R3̄ phase by using the Heyd-Scuseria-Ernzerhof (HSE06) method and the estimated Vickers hardness values are higher than 40 GPa by adopting the elastic modulus based hardness formula, which confirmed their superhard characteristics. These results provide significant insights into Si-C-N systems and will inevitably promote the future experimental works.
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Affiliation(s)
- Chengyu Wang
- College of Science, Shenyang University of Chemical Technology, Shenyang 110142, China.
| | - Guoliang Yu
- College of Science, Shenyang University of Chemical Technology, Shenyang 110142, China.
| | - Shoutao Zhang
- School of Physics, Northeast Normal University, Changchun 130012, China
| | - Yu Zhao
- School of Material Science and Engineering, Shenyang Jianzhu University, Shenyang 110168, China
| | - Hui Chen
- College of Science, Shenyang University of Chemical Technology, Shenyang 110142, China.
| | - Taimin Cheng
- College of Science, Shenyang University of Chemical Technology, Shenyang 110142, China.
| | - Xinxin Zhang
- College of Science, Shenyang University of Chemical Technology, Shenyang 110142, China.
- School of Materials Science and Engineering, Jilin University, Changchun 130012, China
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9
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Lu L, Gallenstein R, Liu X, Lin Y, Lin S, Chen Z. Holey penta-hexagonal graphene: a promising anode material for Li-ion batteries. Phys Chem Chem Phys 2024; 26:7335-7342. [PMID: 38363115 DOI: 10.1039/d3cp06146a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2024]
Abstract
Carbon allotropes are widely used as anode materials in Li batteries, with graphite being commercially successful. However, the limited capacity and cycling stability of graphite impede further advancement and hinder the development of electric vehicles. Herein, through density functional theory (DFT) computations and ab initio molecular dynamics (AIMD) simulations, we proposed holey penta-hexagonal graphene (HPhG) as a potential anode material, achieved through active site designing. Due to the internal electron accumulation from the π-bond, HPhG follows a single-layer adsorption mechanism on each side of the nanosheet, enabling a high theoretical capacity of 1094 mA h g-1 without the risk of vertical dendrite growth. HPhG also exhibits a low open circuit voltage of 0.29 V and a low ion migration barrier of 0.32 eV. Notably, during the charge/discharge process, the lattice only expands slightly by 1.1%, indicating excellent structural stability. This work provides valuable insights into anode material design and presents HPhG as a promising two-dimensional material for energy storage applications.
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Affiliation(s)
- Linguo Lu
- Department of Physics, University of Puerto Rico, Rio Piedras, San Juan, PR 00931, USA
| | - Raven Gallenstein
- Division of Chemistry and Biochemistry, Texas Woman's University, Denton, TX 76204, USA.
| | - Xinghui Liu
- Centre for Integrated Nanostructure Physics (CINAP), Institute of Basic Science (IBS), 2066 Seoburo, Jangan-Gu, Suwon 16419, Republic of Korea
- Department of Chemistry, Sungkyunkwan University (SKKU), 2066 Seoburo, Jangan-Gu, Suwon 16419, Republic of Korea
| | - Yi Lin
- Advanced Materials and Processing Branch, NASA Langley Research Center, Hampton, Virginia 23681, USA
| | - Shiru Lin
- Division of Chemistry and Biochemistry, Texas Woman's University, Denton, TX 76204, USA.
| | - Zhongfang Chen
- Department of Chemistry, University of Puerto Rico, Rio Piedras, San Juan, PR 00931, USA.
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10
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Ariga K. 2D Materials Nanoarchitectonics for 3D Structures/Functions. MATERIALS (BASEL, SWITZERLAND) 2024; 17:936. [PMID: 38399187 PMCID: PMC10890396 DOI: 10.3390/ma17040936] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/20/2024] [Revised: 02/09/2024] [Accepted: 02/09/2024] [Indexed: 02/25/2024]
Abstract
It has become clear that superior material functions are derived from precisely controlled nanostructures. This has been greatly accelerated by the development of nanotechnology. The next step is to assemble materials with knowledge of their nano-level structures. This task is assigned to the post-nanotechnology concept of nanoarchitectonics. However, nanoarchitectonics, which creates intricate three-dimensional functional structures, is not always easy. Two-dimensional nanoarchitectonics based on reactions and arrangements at the surface may be an easier target to tackle. A better methodology would be to define a two-dimensional structure and then develop it into a three-dimensional structure and function. According to these backgrounds, this review paper is organized as follows. The introduction is followed by a summary of the three issues; (i) 2D to 3D dynamic structure control: liquid crystal commanded by the surface, (ii) 2D to 3D rational construction: a metal-organic framework (MOF) and a covalent organic framework (COF); (iii) 2D to 3D functional amplification: cells regulated by the surface. In addition, this review summarizes the important aspects of the ultimate three-dimensional nanoarchitectonics as a perspective. The goal of this paper is to establish an integrated concept of functional material creation by reconsidering various reported cases from the viewpoint of nanoarchitectonics, where nanoarchitectonics can be regarded as a method for everything in materials science.
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Affiliation(s)
- Katsuhiko Ariga
- Research Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba 305-0044, Ibaraki, Japan;
- Graduate School of Frontier Sciences, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa 277-8561, Chiba, Japan
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11
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Tiwari S, Van de Put M, Sorée B, Hinkle C, Vandenberghe WG. Reduction of Magnetic Interaction Due to Clustering in Doped Transition-Metal Dichalcogenides: A Case Study of Mn-, V-, and Fe-Doped WSe 2. ACS APPLIED MATERIALS & INTERFACES 2024; 16:4991-4998. [PMID: 38235733 DOI: 10.1021/acsami.3c14114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/19/2024]
Abstract
Using Hubbard-U-corrected density functional theory calculations, lattice Monte Carlo simulations, and spin Monte Carlo simulations, we investigate the impact of dopant clustering on the magnetic properties of WSe2 doped with period four transition metals. We use manganese (Mn) and iron (Fe) as candidate n-type dopants and vanadium (V) as the candidate p-type dopant, substituting the tungsten (W) atom in WSe2. Specifically, we determine the strength of the exchange interaction in Fe-, Mn-, and V-doped WSe2 in the presence of clustering. We show that the clusters of dopants are energetically more stable than discretely doped systems. Further, we show that in the presence of dopant clustering, the magnetic exchange interaction significantly reduces because the magnetic order in clustered WSe2 becomes more itinerant. Finally, we show that the clustering of the dopant atoms has a detrimental effect on the magnetic interaction, and to obtain an optimal Curie temperature, it is important to control the distribution of the dopant atoms.
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Affiliation(s)
- Sabyasachi Tiwari
- Department of Materials Science and Engineering, The University of Texas at Dallas, 800 W Campbell Rd., Richardson, Texas 75080, United States
- Imec, Kapeldreef 75, 3001 Heverlee, Belgium
- Department of Materials Engineering, KU Leuven, Kasteelpark Arenberg 44, 3001 Leuven, Belgium
| | - Maarten Van de Put
- Department of Materials Science and Engineering, The University of Texas at Dallas, 800 W Campbell Rd., Richardson, Texas 75080, United States
- Imec, Kapeldreef 75, 3001 Heverlee, Belgium
| | - Bart Sorée
- Imec, Kapeldreef 75, 3001 Heverlee, Belgium
- Department of Electrical Engineering, KU Leuven, Kasteelpark Arenberg 10, 3001 Leuven, Belgium
- Department of Physics, Universiteit Antwerpen, Groenenborgerlaan 171, 2020 Antwerp, Belgium
| | - Christopher Hinkle
- Department of Electrical Engineering, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - William G Vandenberghe
- Department of Materials Science and Engineering, The University of Texas at Dallas, 800 W Campbell Rd., Richardson, Texas 75080, United States
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12
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Li Y, Zhang B. Moiré-of-Moiré phases formed in twisted graphene/hexagonal boron nitride heterostructures under high pressure. Phys Chem Chem Phys 2024; 26:3548-3559. [PMID: 38214090 DOI: 10.1039/d3cp05098j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2024]
Abstract
The atomistic behavior and mechanical properties of twisted graphene/h-BN (T-GBN) heterostructures under hydrostatic high-pressure is investigated using density functional theory with the Perdew-Burke-Ernzerhof functional. Systematic explorations of T-GBN heterostructures with different twist angles (9.43°, 13.17°, and 21.78° characterized by moiré patterns) reveal that stable phases, denoted as Moiré-BC2N (m-BC2N), are formed. Notably, the m-BC2N (21.78°) phase maintains perfect sp3 hybridization, even upon complete relaxation to zero pressure, and its mechanical stability is confirmed; comprehensive mechanical evaluations unveil the crystal anisotropic attributes, further highlighting its exceptionally high hardness. Specifically, m-BC2N (21.78°) demonstrates an impressive hardness of 74.7 GPa. Furthermore, electronic structure analysis of m-BC2N exhibits wide bandgaps (Eg), , comparable to diamond, while m-BC2N (9.43°) exhibits a lower bandgap, . This study sheds light on designing novel BCN ternary structures with outstanding mechanical properties under high pressures.
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Affiliation(s)
- Yaomin Li
- State Key Laboratory of Mechanics and Control for Aerospace Structures, and College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics, No. 29 Yudao Street, Nanjing 210016, P. R. China.
| | - Bin Zhang
- State Key Laboratory of Mechanics and Control for Aerospace Structures, and College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics, No. 29 Yudao Street, Nanjing 210016, P. R. China.
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Růžička K, Pokorný V, Plutnar J, Plutnarová I, Wu B, Sofer Z, Sedmidubský D. Heat Capacity of Indium or Gallium Sesqui-Chalcogenides. MATERIALS (BASEL, SWITZERLAND) 2024; 17:361. [PMID: 38255536 PMCID: PMC10817357 DOI: 10.3390/ma17020361] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/28/2023] [Revised: 01/05/2024] [Accepted: 01/08/2024] [Indexed: 01/24/2024]
Abstract
The chalcogenides of p-block elements constitute a significant category of materials with substantial potential for advancing the field of electronic and optoelectronic devices. This is attributed to their exceptional characteristics, including elevated carrier mobility and the ability to fine-tune band gaps through solid solution formation. These compounds exhibit diverse structures, encompassing both three-dimensional and two-dimensional configurations, the latter exemplified by the compound In2Se3. Sesqui-chalcogenides were synthesized through the direct reaction of highly pure elements within a quartz ampoule. Their single-phase composition was confirmed using X-ray diffraction, and the morphology and chemical composition were characterized using scanning electron microscopy. The compositions of all six materials were also confirmed using X-ray photoelectron spectroscopy and Raman spectroscopy. This investigation delves into the thermodynamic properties of indium and gallium sesqui-chalcogenides. It involves low-temperature heat capacity measurements to evaluate standard entropies and Tian-Calvet calorimetry to elucidate the temperature dependence of heat capacity beyond the reference temperature of 298.15 K, as well as the enthalpy of formation assessed from DFT calculations.
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Affiliation(s)
- Květoslav Růžička
- Department of Physical Chemistry, Faculty of Chemical Engineering, University of Chemistry and Technology, Prague, Technická 5, 166 28 Prague, Czech Republic; (K.R.); (V.P.)
| | - Václav Pokorný
- Department of Physical Chemistry, Faculty of Chemical Engineering, University of Chemistry and Technology, Prague, Technická 5, 166 28 Prague, Czech Republic; (K.R.); (V.P.)
- Institute of Macromolecular Chemistry, Czech Academy of Sciences, Heyrovského Nám. 2, 162 06 Prague, Czech Republic
| | - Jan Plutnar
- Department of Inorganic Chemistry, Faculty of Chemical Technology, University of Chemistry and Technology, Prague, Technická 5, 166 28 Prague, Czech Republic; (J.P.); (I.P.); (B.W.); (Z.S.)
| | - Iva Plutnarová
- Department of Inorganic Chemistry, Faculty of Chemical Technology, University of Chemistry and Technology, Prague, Technická 5, 166 28 Prague, Czech Republic; (J.P.); (I.P.); (B.W.); (Z.S.)
| | - Bing Wu
- Department of Inorganic Chemistry, Faculty of Chemical Technology, University of Chemistry and Technology, Prague, Technická 5, 166 28 Prague, Czech Republic; (J.P.); (I.P.); (B.W.); (Z.S.)
| | - Zdeněk Sofer
- Department of Inorganic Chemistry, Faculty of Chemical Technology, University of Chemistry and Technology, Prague, Technická 5, 166 28 Prague, Czech Republic; (J.P.); (I.P.); (B.W.); (Z.S.)
| | - David Sedmidubský
- Department of Inorganic Chemistry, Faculty of Chemical Technology, University of Chemistry and Technology, Prague, Technická 5, 166 28 Prague, Czech Republic; (J.P.); (I.P.); (B.W.); (Z.S.)
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14
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Vaezi M, Nejat Pishkenari H. Toward steering the motion of surface rolling molecular machines by straining graphene substrate. Sci Rep 2023; 13:20816. [PMID: 38012233 PMCID: PMC10682032 DOI: 10.1038/s41598-023-48214-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2023] [Accepted: 11/23/2023] [Indexed: 11/29/2023] Open
Abstract
The surface rolling molecular machines are proposed to perform tasks and carrying molecular payloads on the substrates. As a result, controlling the surface motion of these molecular machines is of interest for the design of nano-transportation systems. In this study, we evaluate the motion of the nanocar on the graphene nanoribbons with strain gradient, through the molecular dynamics (MD) simulations, and theoretical relations. The nanocar indicates directed motion from the maximum strained part of the graphene to the unstrained end of the substrate. The strain gradient induced driving force and diffusion coefficients of nanocars are analyzed from the simulation and theoretical points of view. To obtain the optimum directed motion of nanocar, we consider the effects of temperature, strain average, and magnitude of strain gradient on the directionality of the motion. Moreover, the mechanism of the motion of nanocar is studied by evaluating the direction of the nanocar's chassis and the rotation of wheels around the axles. Ultimately, the programmable motion of nanocar is shown by adjusting the strain gradient of graphene substrate.
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Affiliation(s)
- Mehran Vaezi
- Center for Nanoscience and Nanotechnology, Institute for Convergence Science & Technology , Sharif University of Technology, Tehran, Iran
| | - Hossein Nejat Pishkenari
- Nano Robotics Laboratory, Mechanical Engineering Department, Sharif University of Technology, Tehran, Iran.
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15
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Huang Y, Rong Y, Zhang W, Zhang Z, Zhang X, Liang W, Yang C. Tailoring carboxylatopillar[5]arene-modified magnetic graphene oxide nanocomposites for the efficient removal of cationic dyes. RSC Adv 2023; 13:34660-34669. [PMID: 38024976 PMCID: PMC10681139 DOI: 10.1039/d3ra07124c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2023] [Accepted: 11/09/2023] [Indexed: 12/01/2023] Open
Abstract
A carboxylatopillar[5]arene-embellished (CP5) magnetic graphene oxide nanocomposite (MGO@CP5) was smoothly constructed via a mild layer-by-layer method. The morphology, structure, and surface characteristics of this nanocomposite was investigated by field-emission scanning electron microscopy, transmission electron microscopy, Fourier transform infrared spectroscopy, Raman spectroscopy, zeta potential, and other techniques. Benefiting from a high capture ability for small molecules of CP5 as a supramolecular host molecule, along with a negative surface charge and large surface area of MGO@CP5, this nanocomposite exhibits an ultrafast, efficient adsorption property for representative cationic dyes: methylene blue (MB) and basic fuchsin (BF). The removal efficiency of MB and BF can reach nearly 99% within 3 min, while the maximum adsorption capacity of the two dyes reaches 240 mg g-1 for MB and 132 mg g-1 for BF. Furthermore, owing to excellent magnetic responsiveness from the tight loading of Fe3O4 nanoparticles on graphene oxide, MGO@CP5 could be easily and magnetically separated, regenerated, and reused four times without an evident reduction in the removal efficiency (>95%). Impressively, the adsorption property of MGO@CP5 reveals a strong tolerance to pH changes and ionic strength interference, which renders it a promising adsorbent in the field of water treatment.
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Affiliation(s)
- Yu Huang
- Institute of Environmental Science, School of Chemistry and Chemical Engineering, Shanxi University Taiyuan 030006 China
| | - Yanqin Rong
- Institute of Environmental Science, School of Chemistry and Chemical Engineering, Shanxi University Taiyuan 030006 China
| | - Wenjia Zhang
- Institute of Environmental Science, School of Chemistry and Chemical Engineering, Shanxi University Taiyuan 030006 China
| | - Zibin Zhang
- College of Material, Chemistry and Chemical Engineering, Key Laboratory of Organosilicon Chemistry and Material Technology, Ministry of Education, Key Laboratory of Organosilicon Material Technology, Hangzhou Normal University Hangzhou 311121 China
| | - Xiaoyuan Zhang
- Institute of Environmental Science, School of Chemistry and Chemical Engineering, Shanxi University Taiyuan 030006 China
| | - Wenting Liang
- Institute of Environmental Science, School of Chemistry and Chemical Engineering, Shanxi University Taiyuan 030006 China
| | - Cheng Yang
- Institute of Environmental Science, School of Chemistry and Chemical Engineering, Shanxi University Taiyuan 030006 China
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, Sichuan University Chengdu 610064 China
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16
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Youzi M, Kianezhad M, Vaezi M, Nejat Pishkenari H. Motion of nanovehicles on pristine and vacancy-defected silicene: implications for controlled surface motion. Phys Chem Chem Phys 2023; 25:28895-28910. [PMID: 37855185 DOI: 10.1039/d3cp02835f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2023]
Abstract
Understanding the motion of surface-rolling nanomachines has attracted lots of attention in recent studies, due to their ability in carrying molecular payloads and nanomaterials on the surface. Controlling the surface motion of these nanovehicles is beneficial in the fabrication of nano-transportation systems. In the present study, molecular dynamics (MD) simulations alongside the potential energy analysis have been utilized to investigate the motion of C60 and C60-based nanovehicles on the silicene monolayer. Nano-machine simulations are performed using molecular mechanic forcefield. Compared with graphene and hexagonal boron-nitride, the molecules experience a higher energy barrier on the silicene, which leads to a lower diffusion coefficient and higher activation energy of C60 and nanomachines. Overcoming the maximum energy barrier against sliding motion is more probable at higher temperatures where the nanomachines receive higher thermal energy. After evaluating the motion of molecules around local vacancies, we introduce a nanoroad structure that can restrict surface motion. The motion of C60 and nanovehicles over the surface is limited to the width of nanorods up to a certain temperature. To increase the controllability of the motion, a thermal gradient has been applied to the surface and the molecules move toward the lower temperature regions, where they find lower energy levels. Comparing the results of this study with other investigations regarding the surface motion of molecules on boron-nitride and graphene surfaces brings forth the idea of controlling the motion by silicene-based hybrid substrates, which can be further investigated.
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Affiliation(s)
- Mehrdad Youzi
- Department of Civil and Environmental Engineering, University of California Irvine, Irvine, USA
| | - Mohammad Kianezhad
- Department of Structural Engineering, University of California-San Diego, La Jolla, CA, 92093-0085, USA
| | - Mehran Vaezi
- Institute for Nanoscience and Nanotechnology (INST), Sharif University of Technology, Tehran, Iran
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17
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Matsokin NA, Sinitsa AS, Polynskaya YG, Lebedeva IV, Knizhnik AA, Popov AM. Formation of carbon propeller-like molecules from starphenes under electron irradiation. Phys Chem Chem Phys 2023; 25:27027-27033. [PMID: 37789827 DOI: 10.1039/d3cp03611a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/05/2023]
Abstract
Formation of carbon propeller-like molecules (CPLMs) from starphenes on a graphene substrate under electron irradiation with about 100% yield is observed in molecular dynamics simulations using the REBO-1990EVC_CH potential and CompuTEM algorithm. A CPLM consists of three carbon atomic chains connected to the central hexagon and is formed as a result of the spontaneous breaking of bonds between zigzag atomic rows in starphene arms after hydrogen removal by electron impacts. In the absence of the substrate, the CPLM yield is slightly decreased due to sticking between forming chains, while the formation time is increased threefold. The increase of the kinetic electron energy from 45 to 80 keV has no effect on the CPLM formation. Density functional theory (DFT) calculations performed show the stability of CPLMs with respect to the formation of new bonds between carbon atoms in the chains. DFT calculations using the accurate hybrid B3LYP functional provide an insight into the electronic structure of these new molecules.
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Affiliation(s)
- Nikita A Matsokin
- Kintech Lab Ltd., 3rd Khoroshevskaya Street 12, Moscow 123298, Russia.
| | - Alexander S Sinitsa
- Kintech Lab Ltd., 3rd Khoroshevskaya Street 12, Moscow 123298, Russia.
- National Research Centre "Kurchatov Institute", Kurchatov Square 1, Moscow 123182, Russia
| | | | - Irina V Lebedeva
- Simune Atomistics, Avenida de Tolosa 76, San Sebastian 20018, Spain
| | - Andrey A Knizhnik
- Kintech Lab Ltd., 3rd Khoroshevskaya Street 12, Moscow 123298, Russia.
- National Research Centre "Kurchatov Institute", Kurchatov Square 1, Moscow 123182, Russia
| | - Andrey M Popov
- Institute for Spectroscopy of Russian Academy of Sciences, Fizicheskaya Street 5, Troitsk, Moscow 108840, Russia
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18
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Porto JAS, Beserra DJP, de Vasconcelos FM, Silva PV, Girão EC. Electronic properties and carrier mobilities of nanocarbons formed by non-benzoidal building blocks. Phys Chem Chem Phys 2023; 25:27053-27064. [PMID: 37791620 DOI: 10.1039/d3cp01436c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/05/2023]
Abstract
Exotic 1D and 2D carbon nanostructures have been grown in the laboratory in the last few years by means of surface-assisted chemical routes. In these processes, the strategical choice of a molecular precursor plays a dominant role in the determination of the synthesized nanocarbon. Further variations of these techniques are able to produce non-benzoidal carbon quantum-dots (QDs). Considering this experimental scenario as motivation, we propose a series of nanoribbon systems based on concatenating recently synthesized carbon QDs containing pentagonal, hexagonal, and heptagonal rings. We use density functional theory (DFT) simulations to reveal their properties can range from metallic to semiconducting depending on the concatenation hierarchy used to form the nanoribbons. This DFT implementation is based on a LCAO approach to describe valence wavefunctions and most of the simulations employ the PBE-GGA functional. Since this functional is known to underestimate band gaps, we also use the B3LYP functional in a plane-wave DFT approach for a selected case for comparison purposes. These systems show a different gap versus width relationship compared to conventional graphene nanoribbons setups and a particular set of carrier mobility values. We further discuss the interplay between the QD's frontier states and the electronic properties of the nanoribbons in light of their structural details.
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Affiliation(s)
- João Alberto Santos Porto
- Programa de Pós-Graduacão em Ciência e Engenharia dos Materiais, Universidade Federal do Piauí, CEP 64049-550, Teresina, PI, Brazil.
- Universidade Estadual do Maranhão - UEMA, Departamento de Matemática e Física - Campus Caxias, CEP 65604-380, Caxias, Maranhão, Brazil
| | - David Joseph Pereira Beserra
- Instituto Federal de Educação, Ciência e Tecnologia do Maranhão - Campus Buriticupu, CEP 65393-000, Buriticupu, Maranhão, Brazil
| | - Fabrício Morais de Vasconcelos
- Instituto Federal de Educação, Ciência e Tecnologia do Piauí - Campus São João do PI, CEP 64760-000, São João do PI, Piauí, Brazil
| | - Paloma Vieira Silva
- Coordenação do Curso de Licenciatura em Educação do Campo/Ciências da Natureza, Universidade Federal do Piauí, CEP 64808-605, Floriano, Piauí, Brazil
| | - Eduardo Costa Girão
- Programa de Pós-Graduacão em Ciência e Engenharia dos Materiais, Universidade Federal do Piauí, CEP 64049-550, Teresina, PI, Brazil.
- Departamento de Física, Universidade Federal do Piauí, CEP 64049-550, Teresina, Piauí, Brazil
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19
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Ribeiro Junior LA, Pereira Junior ML, Fonseca AF. Elastocaloric Effect in Graphene Kirigami. NANO LETTERS 2023; 23:8801-8807. [PMID: 37477260 DOI: 10.1021/acs.nanolett.3c02260] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/22/2023]
Abstract
Kirigami, a traditional Japanese art of paper cutting, has recently been explored for its elastocaloric effect (ECE) in kirigami-based materials (KMs), where an applied strain induces temperature changes. Importantly, the feasibility of a nanoscale graphene kirigami monolayer was experimentally demonstrated. Here, we investigate the ECE in GK representing the thinnest possible KM to better understand this phenomenon. Through molecular dynamics simulations, we analyze the temperature change and coefficient of performance (COP) of GK. Our findings reveal that while GKs lack the intricate temperature changes observed in macroscopic KMs, they exhibit a substantial temperature change of approximately 9.32 K (23 times higher than that of macroscopic KMs, which is about 0.4 K) for heating and -3.50 K for cooling. Furthermore, they demonstrate reasonable COP values of approximately 1.57 and 0.62, respectively. It is noteworthy that the one-atom-thick graphene configuration prevents the occurrence of the complex temperature distribution observed in macroscopic KMs.
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Affiliation(s)
- Luiz A Ribeiro Junior
- Institute of Physics, University of Brasília, 70910-900 Brasília, Brazil
- Computational Materials Laboratory, LCCMat, Institute of Physics, University of Brasília, 70910-900 Brasília, Brazil
| | - Marcelo L Pereira Junior
- Department of Electrical Engineering, Faculty of Technology, University of Brasília, 70910-900 Brasília, Brazil
| | - Alexandre F Fonseca
- Applied Physics Department, Gleb Wataghin Institute of Physics, University of Campinas, 13083-859 Campinas, São Paulo, Brazil
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20
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Hossain JA, Kim B. The validity of the continuum modeling limit in a single pore flows to the molecular scale. Phys Chem Chem Phys 2023; 25:24919-24929. [PMID: 37691455 DOI: 10.1039/d3cp02488a] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/12/2023]
Abstract
The discrete characteristics of molecules become dominant in the molecular regime when the surface-to-volume ratio becomes very high. Using the well-established continuum approach is questionable due to this dominant behavior. Due to the lack of perfect modeling of such a small-scale system, the experimentalist must rely on the trial and error method. Here we analyze the water transport mechanism through a nanoporous graphene membrane at the molecular level by adopting the classical molecular dynamics (MD) simulation. The results for SPC/E water molecules were compared with those obtained for liquid argon atoms and continuum Sampson's equation predictions. We find that the effect of local variants such as density layering, interatomic forces, slip velocity, and geometric boundary conditions become exponentially dominant with decreasing nanopore size. Consequently, the continuum assumptions break down at 1.5 nm pore diameter due to neglecting the dominant local properties.
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Affiliation(s)
- Jaber Al Hossain
- School of Mechanical Engineering, University of Ulsan, Daehak-ro 93, Namgu, Ulsan 680-749, South Korea.
| | - BoHung Kim
- School of Mechanical Engineering, University of Ulsan, Daehak-ro 93, Namgu, Ulsan 680-749, South Korea.
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21
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Hong X, Shi M, Ding Z, Ding C, Du P, Xia M, Wang F. Unveiling glutamic acid-functionalized LDHs: understanding the Cr(VI) removal mechanism from microscopic and macroscopic view points. Phys Chem Chem Phys 2023; 25:23519-23529. [PMID: 37655599 DOI: 10.1039/d3cp03359g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
Abstract
Interlayer functionalization modulation is essential for modifying LDHs and improving their selectivity and adsorption capacity for target pollutants. In this work, Glu@NiFe-LDH was synthesized using a simple one-step hydrothermal method and tested for its ability to remove CrO42- from wastewater. The modification significantly increased the composite material's removal ability by 2-3 times, up to 98.36 mg g-1. The behavior of CrO42- adsorption on Glu@NiFe-LDH was further studied by adjusting the affecting factors (i.e., temperature, pH, contact time, initial concentration, and interfering substance), and the adsorption behavior was confirmed as a spontaneous and chemisorption process. And the result was that Glu@NiFe-LDH demonstrated high capacity, efficiency, stability, and selectivity for the adsorption of CrO42- in a single electrolyte and natural water containing competing anions. Furthermore, molecular dynamics simulations (NVT ensemble) were employed to further reveal the mechanism of glutamic acid modification on LDH at the microscopic scale. Additionally, the IRI analysis method revealed the mechanism of weak interaction between glutamic acid molecules and CrO42-. This study provides a detailed understanding of the intercalation mechanism involved in the amino acid modification of LDHs. It explains the adsorption mechanism of metal oxo-acid radicals by amino acid-modified LDHs from a theoretical perspective. The findings offer experiments and a theoretical basis for designing targeted adsorbents in the future.
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Affiliation(s)
- Xianyong Hong
- School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China.
- Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
| | - Mingxing Shi
- School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China.
| | - Zhoutian Ding
- School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China.
| | - Chao Ding
- School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China.
| | - Ping Du
- School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China.
| | - Mingzhu Xia
- School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China.
| | - Fengyun Wang
- School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China.
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22
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Zheng B, Liu C, Li Z, Carraro C, Maboudian R, Senesky DG, Gu GX. Investigation of mechanical properties and structural integrity of graphene aerogels via molecular dynamics simulations. Phys Chem Chem Phys 2023; 25:21897-21907. [PMID: 37580983 DOI: 10.1039/d3cp02585c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/16/2023]
Abstract
Graphene aerogel (GA), a 3D carbon-based nanostructure built on 2D graphene sheets, is well known for being the lightest solid material ever synthesized. It also possesses many other exceptional properties, such as high specific surface area and large liquid absorption capacity, thanks to its ultra-high porosity. Computationally, the mechanical properties of GA have been studied by molecular dynamics (MD) simulations, which uncover nanoscale mechanisms beyond experimental observations. However, studies on how GA structures and properties evolve in response to simulation parameter changes, which provide valuable insights to experimentalists, have been lacking. In addition, the differences between the calculated properties via simulations and experimental measurements have rarely been discussed. To address the shortcomings mentioned above, in this study, we systematically study various mechanical properties and the structural integrity of GA as a function of a wide range of simulation parameters. Results show that during the in silico GA preparation, smaller and less spherical inclusions (mimicking the effect of water clusters in experiments) are conducive to strength and stiffness but may lead to brittleness. Additionally, it is revealed that a structurally valid GA in the MD simulation requires the number of bonds per atom to be at least 1.40, otherwise the GA building blocks are not fully interconnected. Finally, our calculation results are compared with experiments to showcase both the power and the limitations of the simulation technique. This work may shed light on the improvement of computational approaches for GA as well as other novel nanomaterials.
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Affiliation(s)
- Bowen Zheng
- Department of Mechanical Engineering, University of California, Berkeley, CA 94720, USA.
| | - Chen Liu
- Department of Mechanical Engineering, Stanford University, CA 94305, USA
| | - Zhou Li
- Department of Aeronautics and Astronautics, Stanford University, CA 94305, USA
- Department of Chemical and Biomolecular Engineering, and Berkeley Sensor & Actuator Center, University of California, Berkeley, CA 94720, USA
| | - Carlo Carraro
- Department of Chemical and Biomolecular Engineering, and Berkeley Sensor & Actuator Center, University of California, Berkeley, CA 94720, USA
| | - Roya Maboudian
- Department of Chemical and Biomolecular Engineering, and Berkeley Sensor & Actuator Center, University of California, Berkeley, CA 94720, USA
| | - Debbie G Senesky
- Department of Aeronautics and Astronautics, Stanford University, CA 94305, USA
- Department of Electrical Engineering, Stanford University, CA 94305, USA
| | - Grace X Gu
- Department of Mechanical Engineering, University of California, Berkeley, CA 94720, USA.
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23
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Yin K, Shi L, Ma X, Zhong Y, Li M, He X. Thermal Conductivity of 3C/4H-SiC Nanowires by Molecular Dynamics Simulation. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:2196. [PMID: 37570514 PMCID: PMC10421163 DOI: 10.3390/nano13152196] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/04/2023] [Revised: 07/24/2023] [Accepted: 07/25/2023] [Indexed: 08/13/2023]
Abstract
Silicon carbide (SiC) is a promising material for thermoelectric power generation. The characterization of thermal transport properties is essential to understanding their applications in thermoelectric devices. The existence of stacking faults, which originate from the "wrong" stacking sequences of Si-C bilayers, is a general feature of SiC. However, the effects of stacking faults on the thermal properties of SiC are not well understood. In this study, we evaluated the accuracy of Tersoff, MEAM, and GW potentials in describing the thermal transport of SiC. Additionally, the thermal conductivity of 3C/4H-SiC nanowires was investigated using non-equilibrium molecular dynamics simulations (NEMD). Our results show that thermal conductivity exhibits an increase and then saturation as the total lengths of the 3C/4H-SiC nanowires vary from 23.9 nm to 95.6 nm, showing the size effect of molecular dynamics simulations of the thermal conductivity. There is a minimum thermal conductivity, as a function of uniform period length, of the 3C/4H-SiC nanowires. However, the thermal conductivities of nanowires weakly depend on the gradient period lengths and the ratio of 3C/4H. Additionally, the thermal conductivity of 3C/4H-SiC nanowires decreases continuously from compressive strain to tensile strain. The reduction in thermal conductivity suggests that 3C/4H-SiC nanowires have potential applications in advanced thermoelectric devices. Our study provides insights into the thermal transport properties of SiC nanowires and can guide the development of SiC-based thermoelectric materials.
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Affiliation(s)
- Kaili Yin
- Center for Composite Materials and Structures, Harbin Institute of Technology, Harbin 150080, China
| | - Liping Shi
- Center for Composite Materials and Structures, Harbin Institute of Technology, Harbin 150080, China
| | - Xiaoliang Ma
- Center for Composite Materials and Structures, Harbin Institute of Technology, Harbin 150080, China
| | - Yesheng Zhong
- Center for Composite Materials and Structures, Harbin Institute of Technology, Harbin 150080, China
| | - Mingwei Li
- School of Material Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
| | - Xiaodong He
- Center for Composite Materials and Structures, Harbin Institute of Technology, Harbin 150080, China
- Shenzhen STRONG Advanced Materials Research Institute Co., Ltd., Shenzhen 518000, China
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24
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Zhu H, Fan L, Wang K, Liu H, Zhang J, Yan S. Progress in the Synthesis and Application of Tellurium Nanomaterials. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:2057. [PMID: 37513066 PMCID: PMC10384241 DOI: 10.3390/nano13142057] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2023] [Revised: 07/04/2023] [Accepted: 07/04/2023] [Indexed: 07/30/2023]
Abstract
In recent decades, low-dimensional nanodevices have shown great potential to extend Moore's Law. The n-type semiconductors already have several candidate materials for semiconductors with high carrier transport and device performance, but the development of their p-type counterparts remains a challenge. As a p-type narrow bandgap semiconductor, tellurium nanostructure has outstanding electrical properties, controllable bandgap, and good environmental stability. With the addition of methods for synthesizing various emerging tellurium nanostructures with controllable size, shape, and structure, tellurium nanomaterials show great application prospects in next-generation electronics and optoelectronic devices. For tellurium-based nanomaterials, scanning electron microscopy and transmission electron microscopy are the main characterization methods for their morphology. In this paper, the controllable synthesis methods of different tellurium nanostructures are reviewed, and the latest progress in the application of tellurium nanostructures is summarized. The applications of tellurium nanostructures in electronics and optoelectronics, including field-effect transistors, photodetectors, and sensors, are highlighted. Finally, the future challenges, opportunities, and development directions of tellurium nanomaterials are prospected.
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Affiliation(s)
- Hongliang Zhu
- School of Materials Science and Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210023, China
| | - Li Fan
- School of Materials Science and Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210023, China
| | - Kaili Wang
- School of Integrated Circuit Science and Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210023, China
| | - Hao Liu
- School of Geography and Biological Information, Nanjing University of Posts and Telecommunications, Nanjing 210023, China
| | - Jiawei Zhang
- School of Materials Science and Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210023, China
| | - Shancheng Yan
- School of Geography and Biological Information, Nanjing University of Posts and Telecommunications, Nanjing 210023, China
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Zhao Y, Shen G, Wang Y, Hao X, Li H. Methyl-Trimethoxy-Siloxane-Modified Mg-Al-Layered Hydroxide Filler for Thermal-Insulation Coatings. MATERIALS (BASEL, SWITZERLAND) 2023; 16:4464. [PMID: 37374647 DOI: 10.3390/ma16124464] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2023] [Revised: 06/16/2023] [Accepted: 06/17/2023] [Indexed: 06/29/2023]
Abstract
The development of high-performance insulation materials that facilitate the reduction in building energy consumption is of paramount significance. In this study, magnesium-aluminum-layered hydroxide (LDH) was prepared by the classical hydrothermal reaction. By implementing methyl trimethoxy siloxane (MTS), two different MTS-functionalized LDHs were prepared via a one-step in situ hydrothermal synthesis method and a two-step method. Furthermore, using techniques, such as X-ray diffraction, infrared spectroscopy, particle size analysis, and scanning electron microscopy, we evaluated and analyzed the composition, structure, and morphology of the various LDH samples. These LDHs were then employed as inorganic fillers in waterborne coatings, and their thermal-insulation capabilities were tested and compared. It was found that MTS-modified LDH via a one-step in situ hydrothermal synthesis method (M-LDH-2) exhibited the best thermal insulating properties by displaying a thermal-insulation-temperature difference (ΔT) of 25 °C compared with the blank panel. In contrast, the panels coated with unmodified LDH and the MTS-modified LDH via the two-step method exhibited thermal-insulation-temperature difference values of 13.5 °C and 9.5 °C, respectively. Our investigation involved a comprehensive characterization of LDH materials and coating films, unveiling the underlying mechanism of thermal insulation and establishing the correlation between LDH structure and the corresponding insulation performance of the coating. Our findings reveal that the particle size and distribution of LDHs are critical factors in dictating their thermal-insulation capabilities in the coatings. Specifically, we observed that the MTS-modified LDH, prepared via a one-step in situ hydrothermal approach, possessed a larger particle size and wider particle size distribution, resulting in superior thermal-insulation effectiveness. In contrast, the MTS-modified LDH via the two-step method exhibited a smaller particle size and narrow particle size distribution, causing a moderate thermal-insulation effect. This study has significant implications for opening up the potential for LDH-based thermal-insulation coatings. We believe the findings can promote the development of new products and help upgrade industries, while contributing to local economic growth.
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Affiliation(s)
- Yanhua Zhao
- Guangdong Provincial Key Laboratory of Environmental Health and Land Resource, College of Environmental and Chemical Engineering, Zhaoqing University, Zhaoqing 526061, China
| | - Guanhua Shen
- Guangdong Provincial Key Laboratory of Environmental Health and Land Resource, College of Environmental and Chemical Engineering, Zhaoqing University, Zhaoqing 526061, China
| | - Yongli Wang
- Guangdong Provincial Key Laboratory of Environmental Health and Land Resource, College of Environmental and Chemical Engineering, Zhaoqing University, Zhaoqing 526061, China
| | - Xiangying Hao
- Guangdong Provincial Key Laboratory of Environmental Health and Land Resource, College of Environmental and Chemical Engineering, Zhaoqing University, Zhaoqing 526061, China
| | - Huining Li
- Zhaoqing Rivers High-Tech Materials Co., Ltd., Zhaoqing 526061, China
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Zou Y, Wang X, Liu L, Song T, Liu Z, Cui X. First-Principles Study on Mechanical, Electronic, and Magnetic Properties of Room Temperature Ferromagnetic Half-Metal MnNCl Monolayer. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:nano13111712. [PMID: 37299615 DOI: 10.3390/nano13111712] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2023] [Revised: 05/18/2023] [Accepted: 05/22/2023] [Indexed: 06/12/2023]
Abstract
Two-dimensional ferromagnetic (FM) half-metals are highly desirable for the development of multifunctional spintronic nano-devices due to their 100% spin polarization and possible interesting single-spin electronic states. Herein, using first-principles calculations based on density functional theory (DFT) with the Perdew-Burke-Ernzerhof (PBE) functional, we demonstrate that the MnNCl monolayer is a promising FM half-metal for spintronics. Specifically, we systematically investigated its mechanical, magnetic, and electronic properties. The results reveal that the MnNCl monolayer has superb mechanic, dynamic, and thermal (ab initio molecular dynamics (AIMD) simulation at 900 K) stability. More importantly, its intrinsic FM ground state has a large magnetic moment (6.16 μB), a large magnet anisotropy energy (184.5 μeV), an ultra-high Curie temperature (952 K), and a wide direct band gap (3.10 eV) in the spin-down channel. Furthermore, by applying biaxial strain, the MnNCl monolayer can still maintain its half-metallic properties and shows an enhancement of magnetic properties. These findings establish a promising new two-dimensional (2D) magnetic half-metal material, which should expand the library of 2D magnetic materials.
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Affiliation(s)
- Yuxin Zou
- School of Physical Science and Technology, Inner Mongolia University, Hohhot 010021, China
| | - Xin Wang
- School of Physical Science and Technology, Inner Mongolia University, Hohhot 010021, China
| | - Liwei Liu
- School of Physical Science and Technology, Inner Mongolia University, Hohhot 010021, China
| | - Tielei Song
- School of Physical Science and Technology, Inner Mongolia University, Hohhot 010021, China
| | - Zhifeng Liu
- School of Physical Science and Technology, Inner Mongolia University, Hohhot 010021, China
| | - Xin Cui
- School of Physical Science and Technology, Inner Mongolia University, Hohhot 010021, China
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Kim YJ, Kim YH, Ahn S. Selective Blocking of Graphene Defects Using Polyvinyl Alcohol through Hydrophilicity Difference. MATERIALS (BASEL, SWITZERLAND) 2023; 16:2001. [PMID: 36903122 PMCID: PMC10004167 DOI: 10.3390/ma16052001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/10/2023] [Revised: 02/20/2023] [Accepted: 02/27/2023] [Indexed: 06/18/2023]
Abstract
Defects on graphene over a micrometer in size were selectively blocked using polyvinyl alcohol through the formation of hydrogen bonding with defects. Because this hydrophilic PVA does not prefer to be located on the hydrophobic graphene surface, PVA selectively filled hydrophilic defects on graphene after the process of deposition through the solution. The mechanism of the selective deposition via hydrophilic-hydrophilic interactions was also supported by scanning tunneling microscopy and atomic force microscopy analysis of selective deposition of hydrophobic alkanes on hydrophobic graphene surface and observation of PVA initial growth at defect edges.
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Affiliation(s)
- Yoon-jeong Kim
- Institute of Advanced Composite Materials, Korea Institute of Science and Technology (KIST), Jeonbuk 55324, Republic of Korea
| | - Yang Hui Kim
- Institute of Advanced Composite Materials, Korea Institute of Science and Technology (KIST), Jeonbuk 55324, Republic of Korea
- School of Semiconductor and Chemical Engineering, Jeonbuk National University, Jeonbuk 54896, Republic of Korea
| | - Seokhoon Ahn
- Institute of Advanced Composite Materials, Korea Institute of Science and Technology (KIST), Jeonbuk 55324, Republic of Korea
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Baimova JA, Shcherbinin SA. Metal/Graphene Composites: A Review on the Simulation of Fabrication and Study of Mechanical Properties. MATERIALS (BASEL, SWITZERLAND) 2022; 16:202. [PMID: 36614540 PMCID: PMC9822068 DOI: 10.3390/ma16010202] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/24/2022] [Revised: 12/19/2022] [Accepted: 12/20/2022] [Indexed: 06/17/2023]
Abstract
Although carbon materials, particularly graphene and carbon nanotubes, are widely used to reinforce metal matrix composites, understanding the fabrication process and connection between morphology and mechanical properties is still not understood well. This review discusses the relevant literature concerning the simulation of graphene/metal composites and their mechanical properties. This review demonstrates the promising role of simulation of composite fabrication and their properties. Further, results from the revised studies suggest that morphology and fabrication techniques play the most crucial roles in property improvements. The presented results can open up the way for developing new nanocomposites based on the combination of metal and graphene components. It is shown that computer simulation is a possible and practical way to understand the effect of the morphology of graphene reinforcement and strengthening mechanisms.
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Affiliation(s)
- Julia A. Baimova
- Institute for Metals Superplasticity Problems of the Russian Academy of Sciences, Ufa 450001, Russia
- Department of Physics and Technology of Nanomaterials, Bashkir State University, Ufa 450076, Russia
| | - Stepan A. Shcherbinin
- Departement of Theoretical and Applied Mechanics, Peter the Great St. Petersburg Polytechnic University, Polytechnicheskaya 29, St. Petersburg 195251, Russia
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