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Luis-Sunga M, González-Orive A, Calderón JC, Gamba I, Ródenas A, de Los Arcos T, Hernández-Creus A, Grundmeier G, Pastor E, García G. Nickel-Induced Reduced Graphene Oxide Nanoribbon Formation on Highly Ordered Pyrolytic Graphite for Electronic and Magnetic Applications. ACS APPLIED NANO MATERIALS 2024; 7:11088-11096. [PMID: 38808309 PMCID: PMC11131383 DOI: 10.1021/acsanm.3c05949] [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: 12/11/2023] [Revised: 04/26/2024] [Accepted: 04/26/2024] [Indexed: 05/30/2024]
Abstract
The development of nanoribbon-like structures is an effective strategy to harness the potential benefits of graphenic materials due to their excellent electrical properties, advantageous edge sites, rapid electron transport, and large specific area. Herein, parallel and connected magnetic nanostructured nanoribbons are obtained through the synthesis of reduced graphene oxide (rGO) using NiCl2 as a precursor with potential applications in nascent electronic and magnetic devices. Several analytical techniques have been used for the thorough characterization of the modified surfaces. Atomic force microscopy (AFM) shows the characteristic topographical features of the nanoribbons. While X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), and Raman spectroscopy provided information on the chemical state of Ni and graphene-like structures, magnetic force microscopy (MFM) and scanning Kelvin probe microscopy (SKPFM) confirmed the preferential concentration of Ni onto rGO nanoribbons. These results indicate that the synthesized material shows 1D ordering of nickel nanoparticles (NiNPs)-decorating tiny rGO flakes into thin threads and the subsequent 2D arrangement of the latter into parallel ribbons following the topography of the HOPG basal plane.
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Affiliation(s)
- Maximina Luis-Sunga
- Instituto
Universitario de Materiales y Nanotecnología, Departamento
de Química, Universidad de La Laguna
(ULL), PO Box 456, La Laguna, Santa
Cruz de Tenerife 38200, España
| | - Alejandro González-Orive
- Instituto
Universitario de Materiales y Nanotecnología, Departamento
de Química, Universidad de La Laguna
(ULL), PO Box 456, La Laguna, Santa
Cruz de Tenerife 38200, España
- Department
of Technical and Macromolecular Chemistry, Paderborn University, Warburger Str. 100, Paderborn 33098, Germany
| | - Juan Carlos Calderón
- Instituto
Universitario de Materiales y Nanotecnología, Departamento
de Química, Universidad de La Laguna
(ULL), PO Box 456, La Laguna, Santa
Cruz de Tenerife 38200, España
- Department
of Technical and Macromolecular Chemistry, Paderborn University, Warburger Str. 100, Paderborn 33098, Germany
| | - Ilaria Gamba
- Instituto
Universitario de Materiales y Nanotecnología, Departamento
de Química, Universidad de La Laguna
(ULL), PO Box 456, La Laguna, Santa
Cruz de Tenerife 38200, España
| | - Airán Ródenas
- Departamento
de Física, Facultad de ciencias, Universidad de La Laguna, Avda. Astrofísico Francisco Sánchez, S/N, La Laguna, Santa Cruz de Tenerife 38200, Spain
- Instituto
Universitario de Estudios Avanzados (IUdEA), Departamento de Física, Universidad de La Laguna, PO Box 456, La Laguna, Santa Cruz de Tenerife 38200, España
| | - Teresa de Los Arcos
- Department
of Technical and Macromolecular Chemistry, Paderborn University, Warburger Str. 100, Paderborn 33098, Germany
| | - Alberto Hernández-Creus
- Instituto
Universitario de Materiales y Nanotecnología, Departamento
de Química, Universidad de La Laguna
(ULL), PO Box 456, La Laguna, Santa
Cruz de Tenerife 38200, España
| | - Guido Grundmeier
- Department
of Technical and Macromolecular Chemistry, Paderborn University, Warburger Str. 100, Paderborn 33098, Germany
| | - Elena Pastor
- Instituto
Universitario de Materiales y Nanotecnología, Departamento
de Química, Universidad de La Laguna
(ULL), PO Box 456, La Laguna, Santa
Cruz de Tenerife 38200, España
| | - Gonzalo García
- Instituto
Universitario de Materiales y Nanotecnología, Departamento
de Química, Universidad de La Laguna
(ULL), PO Box 456, La Laguna, Santa
Cruz de Tenerife 38200, España
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Tan HJ, Si R, Li XB, Tang ZK, Wei XL, Seriani N, Yin WJ, Gebauer R. How spin state and oxidation number of transition metal atoms determine molecular adsorption: a first-principles case study for NH 3. Phys Chem Chem Phys 2024; 26:7688-7694. [PMID: 38372067 DOI: 10.1039/d3cp05042d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/20/2024]
Abstract
Understanding how the electronic state of transition metal atoms can influence molecular adsorption on a substrate is of great importance for many applications. Choosing NH3 as a model molecule, its adsorption behavior on defected SnS2 monolayers is investigated. The number of valence electrons n is controlled by decorating the monolayer with different transition metal atoms, ranging from Sc to Zn. Density-Functional Theory based calculations show that the adsorption energy of NH3 molecules oscillates with n and shows a clear odd-even pattern. There is also a mirror symmetry of the adsorption energies for large and low electron numbers. This unique behavior is mainly governed by the oxidation state of the TM ions. We trace back the observed trends of the adsorption energy to the orbital symmetries and ligand effects which affect the interaction between the 3σ orbitals (NH3) and the 3d orbitals of the transition metals. This result unravels the role which the spin state of TM ions plays in different crystal fields for the adsorption behavior of molecules. This new understanding of the role of the electronic structure on molecular adsorption can be useful for the design of high efficiency nanodevices in areas such as sensing and photocatalysis.
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Affiliation(s)
- Hua-Jian Tan
- School of Physics and Electronic Science, Hunan University of Science and Technology, Xiangtan 411201, China
- Key Laboratory of Intelligent Sensors and Advanced Sensing Materials of Hunan Province, Hunan University of Science and Technology, Xiangtan 411201, China
| | - Rutong Si
- The Abdus Salam International Centre for Theoretical Physics (ICTP), Strada Costiera 11, Trieste I-34151, Italy.
| | - Xi-Bo Li
- Department of Physics, Jinan University, Guangzhou 510632, P. R. China
| | - Zhen-Kun Tang
- College of Physics and Electronics Engineering, Hengyang Normal University, Hengyang 421008, China
| | - Xiao-Lin Wei
- Department of Physics and Laboratory for Quantum Engineering and Micro-Nano Energy Technology, Xiangtan University, Xiangtan 411105, Hunan, China
| | - Nicola Seriani
- The Abdus Salam International Centre for Theoretical Physics (ICTP), Strada Costiera 11, Trieste I-34151, Italy.
| | - Wen-Jin Yin
- School of Physics and Electronic Science, Hunan University of Science and Technology, Xiangtan 411201, China
- The Abdus Salam International Centre for Theoretical Physics (ICTP), Strada Costiera 11, Trieste I-34151, Italy.
- Key Laboratory of Intelligent Sensors and Advanced Sensing Materials of Hunan Province, Hunan University of Science and Technology, Xiangtan 411201, China
| | - Ralph Gebauer
- The Abdus Salam International Centre for Theoretical Physics (ICTP), Strada Costiera 11, Trieste I-34151, Italy.
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Wang Y, Guo W, Guo Y. Charge Exchange and Transfer between Water and van der Waals Monolayers Under Tensile Strains. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:714-720. [PMID: 38154109 DOI: 10.1021/acs.langmuir.3c02924] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/30/2023]
Abstract
Charge exchange and transfer between water and low-dimensional materials are critical for water-related nanogenerators to harvest electricity from water. By first-principles calculations and molecular dynamics simulations, the interface interaction and charge transfer between ion-containing or pure water and two-dimensional (2D) van der Waals monolayers including transition metal dichalcogenides, hexagonal boron nitride, and graphene have been systematically investigated. Applying uniaxial tensile strain or the introduction of defects on 2D monolayers could significantly enhance the interface interaction and charge transfer from 2D monolayers to water molecules, as the tensile strain or defect weakens the bonds of 2D monolayers and changes the hydrogen bond networks in the interfacial water layer. In contrast, the presence of ions in water suppresses the charge transfer from 2D monolayers to water molecules and reduces interfacial adhesion because of the formation of hydrated ions and stronger charge exchange between ions and water molecules. These results reveal the role of strain, defect, and ion in dominating the charge exchange and transfer between water and 2D monolayers.
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Affiliation(s)
- Yue Wang
- State Key Laboratory of Mechanics and Control for Aerospace Structures, MOE Key Laboratory for Intelligent Nano Materials and Devices, College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
| | - Wanlin Guo
- State Key Laboratory of Mechanics and Control for Aerospace Structures, MOE Key Laboratory for Intelligent Nano Materials and Devices, College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
| | - Yufeng Guo
- State Key Laboratory of Mechanics and Control for Aerospace Structures, MOE Key Laboratory for Intelligent Nano Materials and Devices, College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
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Liu C, Hongo K, Maezono R, Zhang J, Oshima Y. Stiffer Bonding of Armchair Edge in Single-Layer Molybdenum Disulfide Nanoribbons. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2023; 10:e2303477. [PMID: 37697633 PMCID: PMC10602518 DOI: 10.1002/advs.202303477] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/29/2023] [Revised: 08/02/2023] [Indexed: 09/13/2023]
Abstract
The physical and chemical properties of nanoribbon edges are important for characterizing nanoribbons and applying them in electronic devices, sensors, and catalysts. The mechanical response of molybdenum disulfide nanoribbons, which is an important issue for their application in thin resonators, is expected to be affected by the edge structure, albeit this result is not yet being reported. In this work, the width-dependent Young's modulus is precisely measured in single-layer molybdenum disulfide nanoribbons with armchair edges using the developed nanomechanical measurement based on a transmission electron microscope. The Young's modulus remains constant at ≈166 GPa above 3 nm width, but is inversely proportional to the width below 3 nm, suggesting a higher bond stiffness for the armchair edges. Supporting the experimental results, the density functional theory calculations show that buckling causes electron transfer from the Mo atoms at the edges to the S atoms on both sides to increase the Coulomb attraction.
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Affiliation(s)
- Chunmeng Liu
- Henan Key Laboratory of Diamond Optoelectronic Materials and DevicesKey Laboratory of Materials PhysicsMinistry of Educationand School of Physics & MicroelectronicsZhengzhou UniversityZhengzhou450052China
- School of Materials ScienceJapan Advanced Institute of Science and Technology1‐1 AsahidaiNomiIshikawa923‐1292Japan
- Center of Advanced Analysis & Gene SequencingZhengzhou UniversityZhengzhou450001China
| | - Kenta Hongo
- Research Center for Advanced Computing InfrastructureJapan Advanced Institute of Science and TechnologyNomiIshikawa923‐1292Japan
| | - Ryo Maezono
- School of Information ScienceJapan Advanced Institute of Science and TechnologyNomiIshikawa923‐1292Japan
| | - Jiaqi Zhang
- Henan Key Laboratory of Diamond Optoelectronic Materials and DevicesKey Laboratory of Materials PhysicsMinistry of Educationand School of Physics & MicroelectronicsZhengzhou UniversityZhengzhou450052China
- School of Materials ScienceJapan Advanced Institute of Science and Technology1‐1 AsahidaiNomiIshikawa923‐1292Japan
- Institute of Quantum Materials and PhysicsHenan Academy of SciencesZhengzhou450046China
| | - Yoshifumi Oshima
- School of Materials ScienceJapan Advanced Institute of Science and Technology1‐1 AsahidaiNomiIshikawa923‐1292Japan
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Zhang X, Shi Y, Shi Z, Xia H, Ma M, Wang Y, Huang K, Wu Y, Gong Y, Fei H, He Y, Ye G. High-Pressure Synthesis of Single-Crystalline SnS Nanoribbons. NANO LETTERS 2023; 23:7449-7455. [PMID: 37556377 DOI: 10.1021/acs.nanolett.3c01879] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/11/2023]
Abstract
Two-dimensional tin monosulfide (SnS) is attractive for the development of electronic and optoelectronic devices with anisotropic characteristics. However, its shape-controlled synthesis with an atomic thickness and high quality remains challenging. Here, we show that highly crystalline SnS nanoribbons can be produced via high-pressure (0.5 GPa) and thermal treatment (400 °C). These SnS nanoribbons have a length of several tens of micrometers and a thickness down to 5.8 nm, giving an average aspect ratio of ∼30.6. The crystal orientation along the zigzag direction and the in-plane structural anisotropy of the SnS nanoribbons are identified by transmission electron microscopy and polarized Raman spectroscopy, respectively. An ionic liquid-gated field-effect transistor fabricated using the SnS nanoribbon exhibits an on/off current ratio of >103 and a field-effect mobility of ∼0.7 cm2 V-1 s-1. This work provides a unique way to achieve one-dimensional growth of SnS.
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Affiliation(s)
- Xinyu Zhang
- College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China
| | - Yuyang Shi
- School of Science, Wuhan University of Technology, Wuhan 430070, China
| | - Zude Shi
- College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China
| | - Hang Xia
- College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China
| | - Mingyu Ma
- Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education, School of Physical Science & Technology, Lanzhou University, Lanzhou 730000, China
| | - Yiliu Wang
- College of Physics and Electronics, Hunan University, Changsha 410082, China
| | - Kang Huang
- College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China
| | - Ye Wu
- School of Science, Wuhan University of Technology, Wuhan 430070, China
| | - Yongji Gong
- School of Materials Science and Engineering, Beihang University, Beijing 100191, China
| | - Huilong Fei
- College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China
| | - Yongmin He
- College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China
| | - Gonglan Ye
- College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China
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Hong Y, Deng J, Ding X, Sun J, Liu JZ. Size Limiting Elemental Ferroelectricity in Bi Nanoribbons: Observation, Mechanism, and Opportunity. J Phys Chem Lett 2023; 14:3160-3167. [PMID: 36961418 DOI: 10.1021/acs.jpclett.3c00376] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Combined with the inherent spin-orbital coupling effect, the elemental ferroelectricity of monolayer Bi (bismuthene) is the critical property that renders this system a 2D ferroelectric topological insulator. Here, using first-principles calculations, we systematically investigate the ferroelectric polarization in bismuthene nanoribbons and discover the width size limiting effect arising from the edge effects. The decreasing width led to the spontaneous transformation of the zigzag (ZZ) and armchair (AC) paired Bi nanoribbons into newly discovered high-symmetric nonpolarized nanoribbons. For ZZ-paired nanoribbons, the driving force of the phase transition is attributed to the depolarization field, similar to the conventional perovskite ferroelectric thin films. Instead, edge stress as a novel mechanism played a major role in the phase transition of AC-paired nanoribbons. Inspired by such a revealed mechanism, the phase transition and related ultrahigh piezoelectricity can be achieved by strain engineering in Bi nanoribbons, which could enable new applications for 2D ferroelectric devices.
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Affiliation(s)
- Yunfei Hong
- State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an 710049, China
| | - Junkai Deng
- State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an 710049, China
| | - Xiangdong Ding
- State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an 710049, China
| | - Jun Sun
- State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an 710049, China
| | - Jefferson Zhe Liu
- Department of Mechanical Engineering, The University of Melbourne, Parkville, VIC 3010, Australia
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Moin M, Anwar AW, Ali A, Nabi S, Bashir MZ, Ali S, Bilal S, Haq NU. A comprehensive correlated analysis of Ra-Doped (ZnO 2, ZnO) for optoelectronic applications: a first-principle study. J Mol Model 2023; 29:44. [PMID: 36653515 DOI: 10.1007/s00894-022-05425-z] [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: 10/04/2022] [Accepted: 12/16/2022] [Indexed: 01/20/2023]
Abstract
CONTEXT Zinc oxide (ZnO) exhibits bulk-like behavior and is modified by radium doping to attain favorable electronic properties. The elastic and mechanical response of ZnO2 is much more favorable than ZnO material. The change in thermal expansion, Debye temperature, free energy, entropy, and specific heat leads it to be a good candidate for thermodynamic applications at low and high temperatures. Optical properties like dielectric function, absorption, refraction, reflection, and refractive index obtained after suitable doping transform the material as optically active. ZnO2 has low reflectivity and zero absorption below the electronic band gap as compared to ZnO in a wider spectral range. Our analyses on doped ZnO2 and ZnO make us confident for a wide range of applications in optoelectronic and anti-bacterial treatment in biomedical devices. Especially due to high flexibility and high light transmission, ZnO2 is an excellent applicant for transparent electrodes. METHODS Density functional theory has been employed in consistency with generalized gradient approximation (GGA) with PBEsol to analyze the structural, electronic, elastic, mechanical, thermodynamic, and optical response of pure and Ra-doped (ZnO2 and ZnO) materials.
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Affiliation(s)
- Muhammad Moin
- Department of Physics, University of Engineering and Technology, Lahore, 54890, Pakistan
| | - Abdul Waheed Anwar
- Department of Physics, University of Engineering and Technology, Lahore, 54890, Pakistan.
| | - Anwar Ali
- Department of Physics, University of Engineering and Technology, Lahore, 54890, Pakistan
| | - Shafqat Nabi
- Department of Physics, University of Engineering and Technology, Lahore, 54890, Pakistan
| | - M Zeeshan Bashir
- Department of Physics, University of Engineering and Technology, Lahore, 54890, Pakistan
| | - Shahid Ali
- Department of Physics, University of Engineering and Technology, Lahore, 54890, Pakistan
| | - Shahid Bilal
- Department of Physics, University of Engineering and Technology, Lahore, 54890, Pakistan
| | - Najam Ul Haq
- Department of Physics, Comsats University Lahore, Lahore, 54000, Pakistan
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Abu UO, Akter S, Nepal B, Pitton KA, Guiton BS, Strachan DR, Sumanasekera G, Wang H, Jasinski JB. Ultra-Narrow Phosphorene Nanoribbons Produced by Facile Electrochemical Process. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2022; 9:e2203148. [PMID: 36068163 PMCID: PMC9631066 DOI: 10.1002/advs.202203148] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/27/2022] [Revised: 08/16/2022] [Indexed: 06/15/2023]
Abstract
Phosphorene nanoribbons (PNRs) have inspired strong research interests to explore their exciting properties that are associated with the unique two-dimensional (2D) structure of phosphorene as well as the additional quantum confinement of the nanoribbon morphology, providing new materials strategy for electronic and optoelectronic applications. Despite several important properties of PNRs, the production of these structures with narrow widths is still a great challenge. Here, a facile and straightforward approach to synthesize PNRs via an electrochemical process that utilize the anisotropic Na+ diffusion barrier in black phosphorus (BP) along the [001] zigzag direction against the [100] armchair direction, is reported. The produced PNRs display widths of good uniformity (10.3 ± 3.8 nm) observed by high-resolution transmission electron microscopy, and the suppressed B2g vibrational mode from Raman spectroscopy results. More interestingly, when used in field-effect transistors, synthesized bundles exhibit the n-type behavior, which is dramatically different from bulk BP flakes which are p-type. This work provides insights into a new synthesis approach of PNRs with confined widths, paving the way toward the development of phosphorene and other highly anisotropic nanoribbon materials for high-quality electronic applications.
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Affiliation(s)
- Usman O. Abu
- Conn Center for Renewable Energy ResearchUniversity of LouisvilleLouisvilleKY40292USA
| | - Sharmin Akter
- Department of Mechanical EngineeringUniversity of LouisvilleLouisvilleKY40292USA
| | - Bimal Nepal
- Department of Physics and AstronomyUniversity of LouisvilleLouisvilleKY40292USA
| | - Kathryn A. Pitton
- Department of ChemistryUniversity of Kentucky125 Chemistry–Physics BuildingLexingtonKY40506‐0055USA
| | - Beth S. Guiton
- Department of ChemistryUniversity of Kentucky125 Chemistry–Physics BuildingLexingtonKY40506‐0055USA
| | - Douglas R. Strachan
- Department of Physics and AstronomyUniversity of Kentucky177 Chemistry–Physics BuildingLexingtonKY40506‐0055USA
| | - Gamini Sumanasekera
- Department of Physics and AstronomyUniversity of LouisvilleLouisvilleKY40292USA
| | - Hui Wang
- Department of Mechanical EngineeringUniversity of LouisvilleLouisvilleKY40292USA
| | - Jacek B. Jasinski
- Conn Center for Renewable Energy ResearchUniversity of LouisvilleLouisvilleKY40292USA
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Felix AB, Pacheco M, Orellana P, Latgé A. Vertical and In-Plane Electronic Transport of Graphene Nanoribbon/Nanotube Heterostructures. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:3475. [PMID: 36234603 PMCID: PMC9565596 DOI: 10.3390/nano12193475] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/11/2022] [Revised: 09/23/2022] [Accepted: 09/30/2022] [Indexed: 06/16/2023]
Abstract
All-carbon systems have proven to present interesting transport properties and are often used in electronic devices. Motivated by recent resonant responses measured on graphene/fullerene junction, we propose coupled nanoribbons/carbon-nanotube heterostructures for use as charge filters and to allow tuned transport. These hybrid systems are engineered as a four-terminal device, and we explore multiple combinations of source and collector leads. The armchair-edge configuration results in midgap states when the transport is carried through top/bottom terminals. Such states are robust against the lack of perfect order on the tube and are revealed as sharp steps in the characteristic current curves when a bias potential is turned on. The zigzag-edge systems exhibit differential negative resistance, with features determined by the details of the hybrid structures.
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Affiliation(s)
- Antonio Bernardo Felix
- Physics Institute, Federal Fluminense University, Av. Litorânea, Niterói 24210-356, RJ, Brazil
| | - Monica Pacheco
- Physics Departament, Santa Maria University, Av. Espana, Valparaíso 2390123, Chile
| | - Pedro Orellana
- Physics Departament, Santa Maria University, Av. Espana, Valparaíso 2390123, Chile
| | - Andrea Latgé
- Physics Institute, Federal Fluminense University, Av. Litorânea, Niterói 24210-356, RJ, Brazil
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Ding S, Sun T, Di L, Xue B. Nanostructure engineering of polymeric carbon nitride with boosted photocatalytic antibacterial activity. Appl Organomet Chem 2022. [DOI: 10.1002/aoc.6783] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Shan Ding
- Department of Chemistry, College of Food Science and Technology Shanghai Ocean University Shanghai China
| | - Tao Sun
- Department of Chemistry, College of Food Science and Technology Shanghai Ocean University Shanghai China
- Quality Supervision, Inspection and Testing Center for Cold Storage and Refrigeration Equipment (Shanghai) Ministry of Agriculture Shanghai China
- National Experimental Teaching Demonstration Center for Food Science and Engineering Shanghai Ocean University Shanghai China
| | - Lu Di
- School of Materials Science and Engineering, National Institute for Advanced Materials Nankai University Tianjin China
| | - Bin Xue
- Department of Chemistry, College of Food Science and Technology Shanghai Ocean University Shanghai China
- Quality Supervision, Inspection and Testing Center for Cold Storage and Refrigeration Equipment (Shanghai) Ministry of Agriculture Shanghai China
- National Experimental Teaching Demonstration Center for Food Science and Engineering Shanghai Ocean University Shanghai China
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Chen J, Meng L. Effects of Different Phonon Scattering Factors on the Heat Transport Properties of Graphene Ribbons. ACS OMEGA 2022; 7:20186-20194. [PMID: 35722022 PMCID: PMC9202270 DOI: 10.1021/acsomega.2c02039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/02/2022] [Accepted: 05/18/2022] [Indexed: 06/15/2023]
Abstract
Understanding the effect of phonon scattering is of primary significance in the study of the thermal transport properties of graphene. While phonon scattering negatively affects the thermal conductivity, the exact effect of microscopic phonon scattering is still poorly understood when full phonon dispersions are taken into account. The heat transport properties of graphene ribbons were investigated theoretically by taking into account different polarization branches with different frequencies in order to understand the physical mechanism of the thermal transport phenomenon at the nanoscale. The effects of grain size, chiral angle, Grüneisen anharmonicity parameter, specularity parameter, and mass-fluctuation-scattering parameter were evaluated, taking into account of the restrictions imposed by boundary, Umklapp, and isotope scattering mechanisms. The contribution from each phonon branch was estimated, and the anisotropic coefficients were determined accordingly. The results indicated that the graphene ribbons are very efficient at conducting heat in all the cases studied. All the acoustical branches contribute significantly to the heat transport properties, and the temperature strongly affects the relative contribution of the phonon branches. The lattice thermal conductivity varies periodically with the chiral angle. The maximum thermal conductivity is achieved in the zigzag direction, and the minimum thermal conductivity is obtained in the armchair direction. The lattice thermal conductivity and anisotropic coefficient depend heavily upon the roughness of the edges and the width of the ribbons. The specularity parameter and mass-fluctuation-scattering parameter significantly affect the lattice thermal conductivity, and the effect arising from isotope scattering is significant in the context of natural isotopic abundance. The dependence of the Grüneisen anharmonicity parameter on phonon branches must be taken into account when making predictions. The results have significant implications for the understanding of the relations between phonon scattering and thermal properties.
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