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Al-Owaedi OA. Thermoelectric Properties of Porphyrin Nano Rings: A Theoretical and Modelling Investigation. Chemphyschem 2024; 25:e202300616. [PMID: 38084460 DOI: 10.1002/cphc.202300616] [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: 08/29/2023] [Revised: 12/01/2023] [Indexed: 03/02/2024]
Abstract
Propagation of De Broglie waves through nanomolecular junctions is greatly affected by molecular topology changes, which in turn plays a key role in determining the electronic and thermoelectric properties of source|molecule|drain junctions. The probing and realization of the constructive quantum interference (CQI) and a destructive quantum interference (DQI) are well established in this work. The critical role of quantum interference (QI) in governing and enhancing the transmission coefficient T(E), thermopower (S), power factor (P) and electronic figure of merit (ZelT) of porphyrin nanorings has been investigated using a combination of density functional theory (DFT) methods, a tight binding (Hückel) modelling (TBHM) and quantum transport theory (QTT). Remarkably, DQI not only dominates the asymmetric molecular pathways and lowering T(E), but also improves the thermoelectric properties.
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Affiliation(s)
- Oday A Al-Owaedi
- Department of Laser Physics, University of Babylon, Babylon, Hilla, 51001, Iraq
- Al-Zahrawi University College, Holy Karbala, Karbala, 56001, Iraq
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2
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Jang J, Jo JW, Ohto T, Yoon HJ. Seebeck Effect in Molecular Wires Facilitating Long-Range Transport. J Am Chem Soc 2024; 146:4922-4929. [PMID: 38324711 DOI: 10.1021/jacs.3c14012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/09/2024]
Abstract
The study of molecular wires facilitating long-range charge transport is of fundamental interest for the development of various technologies in (bio)organic and molecular electronics. Defining the nature of long-range charge transport is challenging as electrical characterization does not offer the ability to distinguish a tunneling mechanism from the other. Here, we show that investigation of the Seebeck effect provides the ability. We examine the length dependence of the Seebeck coefficient in electrografted bis-terpyridine Ru(II) complex films. The Seebeck coefficient ranges from 307 to 1027 μV/K, with an increasing rate of 95.7 μV/(K nm) as the film thickness increases to 10 nm. Quantum-chemical calculations unveil that the nearly overlapped molecular-orbital energy level of the Ru complex with the Fermi level accounts for the giant thermopower. Landauer-Büttiker probe simulations indicate that the significant length dependence evinces the Seebeck effect dominated by coherent near-resonant tunneling rather than thermal hopping. This study enhances our comprehension of long-range charge transport, paving the way for efficient electronic and thermoelectric materials.
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Affiliation(s)
- Jiung Jang
- Department of Chemistry, Korea University, Seoul 02841, Korea
| | - Jeong Woo Jo
- Department of Chemistry, Korea University, Seoul 02841, Korea
| | - Tatsuhiko Ohto
- Department of Materials Design Innovation Engineering, Nagoya University, Furo-cho, Chikusa-ku, Aichi 464-8603, Japan
| | - Hyo Jae Yoon
- Department of Chemistry, Korea University, Seoul 02841, Korea
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3
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Xu H, Fan H, Luan Y, Yan S, Martin L, Miao R, Pauly F, Meyhofer E, Reddy P, Linke H, Wärnmark K. Electrical Conductance and Thermopower of β-Substituted Porphyrin Molecular Junctions─Synthesis and Transport. J Am Chem Soc 2023; 145:23541-23555. [PMID: 37874166 PMCID: PMC10623571 DOI: 10.1021/jacs.3c07258] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2023] [Indexed: 10/25/2023]
Abstract
Molecular junctions offer significant potential for enhancing thermoelectric power generation. Quantum interference effects and associated sharp features in electron transmission are expected to enable the tuning and enhancement of thermoelectric properties in molecular junctions. To systematically explore the effect of quantum interferences, we designed and synthesized two new classes of porphyrins, P1 and P2, with two methylthio anchoring groups in the 2,13- and 2,12-positions, respectively, and their Zn complexes, Zn-P1 and Zn-P2. Past theory suggests that P1 and Zn-P1 feature destructive quantum interference in single-molecule junctions with gold electrodes and may thus show high thermopower, while P2 and Zn-P2 do not. Our detailed experimental single-molecule break-junction studies of conductance and thermopower, the latter being the first ever performed on porphyrin molecular junctions, revealed that the electrical conductance of the P1 and Zn-P1 junctions is relatively close, and the same holds for P2 and Zn-P2, while there is a 6 times reduction in the electrical conductance between P1 and P2 type junctions. Further, we observed that the thermopower of P1 junctions is slightly larger than for P2 junctions, while Zn-P1 junctions show the largest thermopower and Zn-P2 junctions show the lowest. We relate the experimental results to quantum transport theory using first-principles approaches. While the conductance of P1 and Zn-P1 junctions is robustly predicted to be larger than those of P2 and Zn-P2, computed thermopowers depend sensitively on the level of theory and the single-molecule junction geometry. However, the predicted large difference in conductance and thermopower values between Zn-P1 and Zn-P2 derivatives, suggested in previous model calculations, is not supported by our experimental and theoretical findings.
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Affiliation(s)
- Hailiang Xu
- NanoLund, Lund University, Box 118, 22100 Lund, Sweden
- Department
of Chemistry, Centre of Analysis and Synthesis, Lund University, Box 121, 22100 Lund, Sweden
| | - Hao Fan
- Department
of Chemistry, Centre of Analysis and Synthesis, Lund University, Box 121, 22100 Lund, Sweden
| | - Yuxuan Luan
- Department
of Mechanical Engineering, University of
Michigan, Ann Arbor, Michigan 48109, United States
| | - Shen Yan
- Department
of Mechanical Engineering, University of
Michigan, Ann Arbor, Michigan 48109, United States
| | - León Martin
- Institute
of Physics and Centre for Advanced Analytics and Predictive Sciences, University of Augsburg, 86159 Augsburg, Germany
| | - Ruijiao Miao
- Department
of Mechanical Engineering, University of
Michigan, Ann Arbor, Michigan 48109, United States
| | - Fabian Pauly
- Institute
of Physics and Centre for Advanced Analytics and Predictive Sciences, University of Augsburg, 86159 Augsburg, Germany
| | - Edgar Meyhofer
- Department
of Mechanical Engineering, University of
Michigan, Ann Arbor, Michigan 48109, United States
| | - Pramod Reddy
- Department
of Mechanical Engineering, University of
Michigan, Ann Arbor, Michigan 48109, United States
- Department
of Materials Science and Engineering, University
of Michigan, Ann Arbor, Michigan 48109, United States
| | - Heiner Linke
- NanoLund, Lund University, Box 118, 22100 Lund, Sweden
- Solid State
Physics, Lund University, Box 118, 22100 Lund, Sweden
| | - Kenneth Wärnmark
- NanoLund, Lund University, Box 118, 22100 Lund, Sweden
- Department
of Chemistry, Centre of Analysis and Synthesis, Lund University, Box 121, 22100 Lund, Sweden
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4
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Zimbovskaya NA. Large enhancement of thermoelectric effects in multiple quantum dots in a serial configuration due to Coulomb interactions. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2022; 34:255302. [PMID: 35378523 DOI: 10.1088/1361-648x/ac640c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2022] [Accepted: 04/04/2022] [Indexed: 06/14/2023]
Abstract
In the present work we theoretically study Seebeck effect in a set of several quantum dots in a serial configuration coupled to nonmagnetic conducting electrodes. We focus on the combined effect of intra-dot Coulomb interactions between electrons and the number of dots on the thermopower (S) and the thermoelectric figure of merit (ZT) of the considered transport junction within the Coulomb blockade regime. We show that a strong enhancement of the bothSand ZT may occur when the chemical potential of electrodes is situated within the Coulomb gap in the electron transmission spectrum thus indicating a possibility of significant increase of the efficiency of heat-to-electric energy conversion. The enhancement becomes more pronounced when the number of dots increases.
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Affiliation(s)
- Natalya A Zimbovskaya
- Department of Physics and Electronics, University of Puerto Rico-Humacao, CUH Station, Humacao, PR 00791, United States of America
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5
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Guo G, Li R, Wei D, Feng Z, Ma Y, Tang Y, Dai X. Gas detection for NO 2 and SO 2 based on tape-heme monolayer. Mol Phys 2021. [DOI: 10.1080/00268976.2021.1939184] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Gaofu Guo
- School of Physics, Henan Normal University, Xinxiang, People’s Republic of China
| | - Renyi Li
- School of Physics, Henan Normal University, Xinxiang, People’s Republic of China
| | - Dong Wei
- School of Physics, Henan Normal University, Xinxiang, People’s Republic of China
| | - Zhen Feng
- School of Physics, Henan Normal University, Xinxiang, People’s Republic of China
- School of Materials Science and Engineering, Henan Engineering Research Center for Modification Technology of Metal Materials, Henan Institute of Technology, Xinxiang, People’s Republic of China
| | - Yaqiang Ma
- School of Physics, Henan Normal University, Xinxiang, People’s Republic of China
| | - Yanan Tang
- School of Physics and Electronic Engineering, Zhengzhou Normal University, Zhengzhou, People’s Republic of China
| | - Xianqi Dai
- School of Physics, Henan Normal University, Xinxiang, People’s Republic of China
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Roy TR, J JDR, Sen A. Inelastic Tunnel Transport and Nanoscale Junction Thermoelectricity with Varying Electrode Topology. ADVANCED THEORY AND SIMULATIONS 2021. [DOI: 10.1002/adts.202100054] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Talem Rebeda Roy
- SRM Research Institute and Department of Physics & Nanotechnology SRM Institute of Science and Technology Chennai Tamil Nadu 603203 India
| | - John Donald Raj J
- SRM Research Institute and Department of Physics & Nanotechnology SRM Institute of Science and Technology Chennai Tamil Nadu 603203 India
| | - Arijit Sen
- SRM Research Institute and Department of Physics & Nanotechnology SRM Institute of Science and Technology Chennai Tamil Nadu 603203 India
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Zimbovskaya NA. Thermoelectric properties of a double-dot system in serial configuration within the Coulomb blockade regime. J Chem Phys 2020; 153:124712. [PMID: 33003716 DOI: 10.1063/5.0021260] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
In the present work, we theoretically study thermoelectric transport and heat transfer in a junction including a double quantum dot in a serial configuration coupled to nonferromagnetic electrodes. We focus on the electron transport within the Coulomb blockade regime in the limit of strong intradot interactions between electrons. It is shown that under these conditions, characteristics of thermoelectric transport in such systems strongly depend on electron occupation on the dots and on interdot Coulomb interactions. We demonstrate that these factors may lead to a heat current rectification and analyze potentialities of a double-dot in a serial configuration as a heat diod.
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Affiliation(s)
- Natalya A Zimbovskaya
- Department of Physics and Electronics, University of Puerto Rico-Humacao, CUH Station, Humacao, Puerto Rico 00791, USA
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8
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Sun Z, Li J, Wong W. Emerging Organic Thermoelectric Applications from Conducting Metallopolymers. MACROMOL CHEM PHYS 2020. [DOI: 10.1002/macp.202000115] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Zelin Sun
- The Hong Kong Polytechnic UniversityShenzhen Research Institute Shenzhen 518057 P. R. China
| | - Jiahua Li
- Department of Applied Biology and Chemical TechnologyThe Hong Kong Polytechnic University Hung Hom Hong Kong P. R. China
| | - Wai‐Yeung Wong
- The Hong Kong Polytechnic UniversityShenzhen Research Institute Shenzhen 518057 P. R. China
- Department of Applied Biology and Chemical TechnologyThe Hong Kong Polytechnic University Hung Hom Hong Kong P. R. China
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9
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Zimbovskaya NA. Charge and heat current rectification by a double-dot system within the Coulomb blockade regime. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2020; 32:325302. [PMID: 32217812 DOI: 10.1088/1361-648x/ab83e9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2019] [Accepted: 03/26/2020] [Indexed: 06/10/2023]
Abstract
Nanoscale rectifiers are known to have significant nanoelectronic and nanoheatronic applications. In the present work we theoretically analyze rectifying properties of a junction including a couple of quantum dots asymmetrically coupled to the electrodes. The charge and heat current rectification in the system is controlled by the dots occupation numbers and interdot Coulomb interactions. We examine the dependencies of the rectification ratio on the electron energy levels on the dots, on the intensity of electron-electron interactions, on the gate and bias voltages and on the thermal gradients applied across the system. It is shown that the considered double-dot system possesses significant potentialities as a common as well as a heat diode.
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Affiliation(s)
- Natalya A Zimbovskaya
- Department of Physics and Electronics, University of Puerto Rico-Humacao, CUH Station, Humacao, PR 00791, United States of America
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10
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Wu Q, Sadeghi H, Lambert CJ. MoS 2 nano flakes with self-adaptive contacts for efficient thermoelectric energy harvesting. NANOSCALE 2018; 10:7575-7580. [PMID: 29637971 DOI: 10.1039/c8nr01635f] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
We examine the potential of the low-dimensional material MoS2 for the efficient conversion of waste heat to electricity via the Seebeck effect. Recently monolayer MoS2 nano flakes with self-adaptive Mo6S6 contacts were formed, which take advantage of mechanical stability and chemical covalent bonding to the MoS2. Here, we study the thermoelectric properties of these junctions by calculating their conductance, thermopower and thermal conductance due to both electrons and phonons. We show that thermoelectric figures of merit ZT as high as ∼2.8 are accessible in these junctions, independent of the flake size and shape, provided the Fermi energy is close to a band edge. We show that Nb dopants as substituents for Mo atoms can be used to tune the Fermi energy, and despite the associated inhomogeneous broadening, room temperature values as high as ZT ∼ 0.6 are accessible, increasing to 0.8 at 500 K.
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Affiliation(s)
- Qingqing Wu
- Quantum Technology Centre, Physics Department, Lancaster University, LA1 4YB Lancaster, UK.
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11
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Zimbovskaya NA, Nitzan A. Thermally induced charge current through long molecules. J Chem Phys 2018; 148:024303. [DOI: 10.1063/1.5005057] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Affiliation(s)
- Natalya A. Zimbovskaya
- Department of Physics and Electronics, University of Puerto Rico, Humacao, Puerto Rico 00791, USA
| | - Abraham Nitzan
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
- School of Chemistry, Tel Aviv University, Tel Aviv, Israel
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