1
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Parashar RK, Jash P, Zharnikov M, Mondal PC. Metal-organic Frameworks in Semiconductor Devices. Angew Chem Int Ed Engl 2024; 63:e202317413. [PMID: 38252076 DOI: 10.1002/anie.202317413] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2023] [Revised: 01/16/2024] [Accepted: 01/22/2024] [Indexed: 01/23/2024]
Abstract
Metal-organic frameworks (MOFs) are a specific class of hybrid, crystalline, nano-porous materials made of metal-ion-based 'nodes' and organic linkers. Most of the studies on MOFs largely focused on porosity, chemical and structural diversity, gas sorption, sensing, drug delivery, catalysis, and separation applications. In contrast, much less reports paid attention to understanding and tuning the electrical properties of MOFs. Poor electrical conductivity of MOFs (~10-7-10-10 S cm-1), reported in earlier studies, impeded their applications in electronics, optoelectronics, and renewable energy storage. To overcome this drawback, the MOF community has adopted several intriguing strategies for electronic applications. The present review focuses on creatively designed bulk MOFs and surface-anchored MOFs (SURMOFs) with different metal nodes (from transition metals to lanthanides), ligand functionalities, and doping entities, allowing tuning and enhancement of electrical conductivity. Diverse platforms for MOFs-based electronic device fabrications, conductivity measurements, and underlying charge transport mechanisms are also addressed. Overall, the review highlights the pros and cons of MOFs-based electronics (MOFtronics), followed by an analysis of the future directions of research, including optimization of the MOF compositions, heterostructures, electrical contacts, device stacking, and further relevant options which can be of interest for MOF researchers and result in improved devices performance.
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Affiliation(s)
- Ranjeev Kumar Parashar
- Department of Chemistry, Indian Institute of Technology, Kanpur, Uttar Pradesh, 208016, India
| | - Priyajit Jash
- Department of Chemistry, Indian Institute of Technology, Kanpur, Uttar Pradesh, 208016, India
| | - Michael Zharnikov
- Angewandte Physikalische Chemie, Universität Heidelberg, Im Neuenheimer Feld 253, 69120, Heidelberg, Germany
| | - Prakash Chandra Mondal
- Department of Chemistry, Indian Institute of Technology, Kanpur, Uttar Pradesh, 208016, India
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2
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Mishra S, Bowes EG, Majumder S, Hollingsworth JA, Htoon H, Jones AC. Inducing Circularly Polarized Single-Photon Emission via Chiral-Induced Spin Selectivity. ACS NANO 2024; 18:8663-8672. [PMID: 38484339 DOI: 10.1021/acsnano.3c08676] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/27/2024]
Abstract
One of the central aims of the field of spintronics is the control of individual electron spins to effectively manage the transmission of quantized data. One well-known mechanism for controlling electronic spin transport is the chiral-induced spin-selectivity (CISS) effect in which a helical nanostructure imparts a preferential spin orientation on the electronic transport. One potential application of the CISS effect is as a transduction pathway between electronic spin and circularly polarized light within nonreciprocal photonic devices. In this work, we identify and quantify the degree of chiral-induced spin-selective electronic transport in helical polyaniline films using magnetoconductive atomic force microscopy (mcAFM). We then induce circularly polarized quantum light emission from CdSe/CdS core/shell quantum dots placed on these films, demonstrating a degree of circular polarization of up to ∼21%. Utilizing time-resolved photoluminescence microscopy, we measure the radiative lifetime difference associated with left- and right-handed circular polarizations of single emitters. These lifetime differences, in combination with Kelvin probe mapping of the variation of surface potential with magnetization of the substrate, help establish an energy level diagram describing the spin-dependent transport pathways that enable the circularly polarized photoluminescence.
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Affiliation(s)
- Suryakant Mishra
- Center for Integrated Nanotechnologies, Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Eric G Bowes
- Center for Integrated Nanotechnologies, Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Somak Majumder
- Center for Integrated Nanotechnologies, Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Jennifer A Hollingsworth
- Center for Integrated Nanotechnologies, Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Han Htoon
- Center for Integrated Nanotechnologies, Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Andrew C Jones
- Center for Integrated Nanotechnologies, Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
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3
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Bloom BP, Paltiel Y, Naaman R, Waldeck DH. Chiral Induced Spin Selectivity. Chem Rev 2024; 124:1950-1991. [PMID: 38364021 PMCID: PMC10906005 DOI: 10.1021/acs.chemrev.3c00661] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2023] [Revised: 01/16/2024] [Accepted: 01/23/2024] [Indexed: 02/18/2024]
Abstract
Since the initial landmark study on the chiral induced spin selectivity (CISS) effect in 1999, considerable experimental and theoretical efforts have been made to understand the physical underpinnings and mechanistic features of this interesting phenomenon. As first formulated, the CISS effect refers to the innate ability of chiral materials to act as spin filters for electron transport; however, more recent experiments demonstrate that displacement currents arising from charge polarization of chiral molecules lead to spin polarization without the need for net charge flow. With its identification of a fundamental connection between chiral symmetry and electron spin in molecules and materials, CISS promises profound and ubiquitous implications for existing technologies and new approaches to answering age old questions, such as the homochiral nature of life. This review begins with a discussion of the different methods for measuring CISS and then provides a comprehensive overview of molecules and materials known to exhibit CISS-based phenomena before proceeding to identify structure-property relations and to delineate the leading theoretical models for the CISS effect. Next, it identifies some implications of CISS in physics, chemistry, and biology. The discussion ends with a critical assessment of the CISS field and some comments on its future outlook.
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Affiliation(s)
- Brian P. Bloom
- Department
of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Yossi Paltiel
- Applied
Physics Department and Center for Nano-Science and Nano-Technology, The Hebrew University of Jerusalem, Jerusalem 9190401, Israel
| | - Ron Naaman
- Department
of Chemical and Biological Physics, Weizmann
Institute, Rehovot 76100, Israel
| | - David H. Waldeck
- Department
of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
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4
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Mélica FN, Saavedra E, Escrig J, Bajales N, Linarez Pérez OE, Arciniegas Jaimes DM. Static and dynamic magnetic properties of circular and square cobalt nanodots in hexagonal cells. Phys Chem Chem Phys 2024; 26:5621-5632. [PMID: 38288508 DOI: 10.1039/d3cp05432b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2024]
Abstract
In this work we performed a detailed numerical analysis to investigate the static and dynamic magnetic properties of hexagonal cells of square and circular cobalt nanodots as a function of the distance between them and the external magnetic field to which they are subjected. By simulating hysteresis curves with the external magnetic field applied parallel and perpendicular to the plane of these nanostructures, we can conclude that the cobalt nanodots presented a significant perpendicular magnetic anisotropy. We also obtained that the coercivity increases with decreasing volume, which implies that the circular dots have a higher coercivity than the square dots. Furthermore, we studied the dynamic susceptibility of these systems and found that it is possible to control both the position and the number of resonance peaks by controlling the geometry and the distance between the magnetic nanodots. This work provides useful information on the behaviour of cobalt nanodot arrays, opening paths for the design and improvement of two-dimensional technological devices.
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Affiliation(s)
- Franco N Mélica
- Universidad Nacional de Córdoba (UNC), Facultad de Ciencias Químicas, Departamento de Fisicoquímica, Haya de la Torre esq. Medina Allende, X5000HUA Córdoba, Argentina.
| | - Eduardo Saavedra
- Universidad de Santiago de Chile (USACH), Departamento de Física, Av. Víctor Jara 3493, 9170124 Santiago, Chile
| | - Juan Escrig
- Universidad de Santiago de Chile (USACH), Departamento de Física, Av. Víctor Jara 3493, 9170124 Santiago, Chile
- Center for the Development of Nanoscience and Nanotechnology (CEDENNA), 9170124 Santiago, Chile
| | - Noelia Bajales
- Universidad Nacional de Córdoba (UNC), FAMAF, 5000 Córdoba, Argentina
- CONICET, IFEG, Av. Medina Allende s/n, 5000 Córdoba, Argentina
| | - Omar E Linarez Pérez
- Universidad Nacional de Córdoba (UNC), Facultad de Ciencias Químicas, Departamento de Fisicoquímica, Haya de la Torre esq. Medina Allende, X5000HUA Córdoba, Argentina.
- CONICET, INFIQC, Haya de la Torre esq. Medina Allende, X5000HUA, Córdoba, Argentina
| | - Diana M Arciniegas Jaimes
- Universidad Nacional de Córdoba (UNC), Facultad de Ciencias Químicas, Departamento de Fisicoquímica, Haya de la Torre esq. Medina Allende, X5000HUA Córdoba, Argentina.
- CONICET, INFIQC, Haya de la Torre esq. Medina Allende, X5000HUA, Córdoba, Argentina
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5
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Xu Y, Mi W. Chiral-induced spin selectivity in biomolecules, hybrid organic-inorganic perovskites and inorganic materials: a comprehensive review on recent progress. MATERIALS HORIZONS 2023; 10:1924-1955. [PMID: 36989068 DOI: 10.1039/d3mh00024a] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The two spin states of electrons are degenerate in nonmagnetic materials. The chiral-induced spin selectivity (CISS) effect provides a new strategy for manipulating electron's spin and a deeper understanding of spin selective processes in organisms. Here, we summarize the important discoveries and recent experiments performed during the development of the CISS effect, analyze the spin polarized transport in various types of materials and discuss the mechanisms, theoretical calculations, experimental techniques and biological significance of the CISS effect. The first part of this review concisely presents a general overview of the discoveries and importance of the CISS effect, laws and underlying mechanisms of which are discussed in the next section, where several classical experimental methods for detecting the CISS effect are also introduced. Based on the organic and inorganic properties of materials, the CISS effect of organic biomolecules, hybrid organic-inorganic perovskites and inorganic materials are reviewed in the third, fourth and fifth sections, especially the chiral transfer mechanism of hybrid materials and the relationship between the CISS effect and life science. In addition, conclusions and prospective future of the CISS effect are outlined at the end, where the development and applications of the CISS effect in spintronics are directly described, which is helpful for designing promising chiral spintronic devices and understanding the natural status of chirality from a new perspective.
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Affiliation(s)
- Yingdan Xu
- Tianjin Key Laboratory of Low Dimensional Materials Physics and Preparation Technology, School of Science, Tianjin University, Tianjin 300354, China.
| | - Wenbo Mi
- Tianjin Key Laboratory of Low Dimensional Materials Physics and Preparation Technology, School of Science, Tianjin University, Tianjin 300354, China.
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6
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Bhartiya PK, Suryansh, Bangruwa N, Srivastava M, Mishra D. Light-Amplified CISS-Based Hybrid QD-DNA Impedimetric Device for DNA Hybridization Detection. Anal Chem 2023; 95:3656-3665. [PMID: 36749750 DOI: 10.1021/acs.analchem.2c04608] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
We design and build a novel light-amplified electrochemical impedimetric device based on the CISS effect to detect DNA hybridization using a hybrid quantum dot (QD)-DNA monolayer on a ferromagnetic (FM) Ni/Au thin film for the first time. Using spin as a detection tool, the current research considers the chiral-induced spin selectivity (CISS) phenomenon. After injecting a spin current into the QD-DNA system with opposite polarities (up and down), the impedimetric device revealed a large differential change in the charge-transfer resistance (ΔRct) of ∼100 ohms for both spins. Nearly, a threefold increase in the ΔRct value to ∼270 ohms is observed when light with a wavelength of 532 nm is illuminated on the sample, owing to the amplified CISS effect. The yield of spin polarization as extracted from the Nyquist plot increases by a factor of more than 2 when exposed to light, going from 6% in the dark to 13% in the light. The impact of light on the CISS effect was further corroborated by the observation of the spin-dependent asymmetric quenching of photoluminescence (PL) in the same hybrid system. These observations are absent in the case of a noncomplementary QD-DNA system due to the absence of a helical structure in DNA. Based on this, we develop a spin-based DNA hybridization sensor and achieve a limit of detection of 10 fM. These findings open a practical path for the development of spin-based next-generation impedimetric DNA sensors and point-of-care devices.
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Affiliation(s)
- Prashant K Bhartiya
- Department of Physics & Astrophysics, University of Delhi, New Delhi 110007, India
| | - Suryansh
- Department of Physics & Astrophysics, University of Delhi, New Delhi 110007, India
| | - Neeraj Bangruwa
- Department of Physics & Astrophysics, University of Delhi, New Delhi 110007, India
| | - Manish Srivastava
- Department of Chemical Engineering and Technology, Indian Institute of Technology, (BHU), Varanasi 221005, India
| | - Debabrata Mishra
- Department of Physics & Astrophysics, University of Delhi, New Delhi 110007, India
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7
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Fransson J. The Chiral Induced Spin Selectivity Effect What It Is, What It Is Not, And Why It Matters. Isr J Chem 2022. [DOI: 10.1002/ijch.202200046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- J. Fransson
- Department of Physics and Astronomy Uppsala University Box 516, 751 21 Uppsala Sweden
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8
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Cai J, Zhao J, Gao X, Ma W, Meng D, Zhang H, Hao C, Sun M, Kuang H, Xu C, Xu L. Magnetic Field Tuning Ionic Current Generated by Chiromagnetic Nanofilms. ACS NANO 2022; 16:11066-11075. [PMID: 35776106 DOI: 10.1021/acsnano.2c03778] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
The realization of chiral magnetic effect by macroscopically manipulating quantum states of chiral matter under the magnetic field makes a future for information transmission, memory storage, magnetic cooling materials etc., while the microscopic tiny signal differences of at the interface electrons are laborious to be discerned. Here, chiromagnetic iron oxide (Fe3O4) nanofilms were successfully prepared by modulating the magnetic and electrical transition dipoles and combined with confined ion transport, enabling magnetic field-tunable ionic currents with markedly ∼7.91-fold higher for l-tartaric acid (TA)-modified Fe3O4 nanofilms than that by d-TA. The apparent amplification results from the charge redistribution at the ferromagnetic-organic interface under the influence of the chiral magnetic effect, resulting in a significant potential difference across the nanofilms that drive ion transport in the confined environment. This strategy, on the one hand, makes it possible to efficiently characterize the electronic microimbalance state in chiral substances induced by the magnetic field and, on the other hand realizes the discrimination and highly sensitive quantitative detection of chiral drug enantiomers, which give insights for the in-depth understanding of chiral magnetic effects and efficient enantiomeric recognition.
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Affiliation(s)
- Jiarong Cai
- International Joint Research Laboratory for Biointerface and Biodetection, Jiangnan University, Wuxi, Jiangsu 214122, P. R. China
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, P. R. China
| | - Jing Zhao
- Department of Radiology, Affiliated Hospital, Jiangnan University, Wuxi, Jiangsu 214122, P. R. China
| | - Xiaoqing Gao
- Wenzhou Institute, University of Chinese Academy of Sciences, and Oujiang Laboratory, Wenzhou, Zhejiang 325001, P. R. China
| | - Wei Ma
- International Joint Research Laboratory for Biointerface and Biodetection, Jiangnan University, Wuxi, Jiangsu 214122, P. R. China
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, P. R. China
| | - Dan Meng
- International Joint Research Laboratory for Biointerface and Biodetection, Jiangnan University, Wuxi, Jiangsu 214122, P. R. China
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, P. R. China
| | - Hongyu Zhang
- International Joint Research Laboratory for Biointerface and Biodetection, Jiangnan University, Wuxi, Jiangsu 214122, P. R. China
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, P. R. China
| | - Changlong Hao
- International Joint Research Laboratory for Biointerface and Biodetection, Jiangnan University, Wuxi, Jiangsu 214122, P. R. China
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, P. R. China
| | - Maozhong Sun
- International Joint Research Laboratory for Biointerface and Biodetection, Jiangnan University, Wuxi, Jiangsu 214122, P. R. China
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, P. R. China
| | - Hua Kuang
- International Joint Research Laboratory for Biointerface and Biodetection, Jiangnan University, Wuxi, Jiangsu 214122, P. R. China
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, P. R. China
| | - Chuanlai Xu
- International Joint Research Laboratory for Biointerface and Biodetection, Jiangnan University, Wuxi, Jiangsu 214122, P. R. China
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, P. R. China
| | - Liguang Xu
- International Joint Research Laboratory for Biointerface and Biodetection, Jiangnan University, Wuxi, Jiangsu 214122, P. R. China
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, P. R. China
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9
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Aiello CD, Abendroth JM, Abbas M, Afanasev A, Agarwal S, Banerjee AS, Beratan DN, Belling JN, Berche B, Botana A, Caram JR, Celardo GL, Cuniberti G, Garcia-Etxarri A, Dianat A, Diez-Perez I, Guo Y, Gutierrez R, Herrmann C, Hihath J, Kale S, Kurian P, Lai YC, Liu T, Lopez A, Medina E, Mujica V, Naaman R, Noormandipour M, Palma JL, Paltiel Y, Petuskey W, Ribeiro-Silva JC, Saenz JJ, Santos EJG, Solyanik-Gorgone M, Sorger VJ, Stemer DM, Ugalde JM, Valdes-Curiel A, Varela S, Waldeck DH, Wasielewski MR, Weiss PS, Zacharias H, Wang QH. A Chirality-Based Quantum Leap. ACS NANO 2022; 16:4989-5035. [PMID: 35318848 PMCID: PMC9278663 DOI: 10.1021/acsnano.1c01347] [Citation(s) in RCA: 61] [Impact Index Per Article: 30.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
There is increasing interest in the study of chiral degrees of freedom occurring in matter and in electromagnetic fields. Opportunities in quantum sciences will likely exploit two main areas that are the focus of this Review: (1) recent observations of the chiral-induced spin selectivity (CISS) effect in chiral molecules and engineered nanomaterials and (2) rapidly evolving nanophotonic strategies designed to amplify chiral light-matter interactions. On the one hand, the CISS effect underpins the observation that charge transport through nanoscopic chiral structures favors a particular electronic spin orientation, resulting in large room-temperature spin polarizations. Observations of the CISS effect suggest opportunities for spin control and for the design and fabrication of room-temperature quantum devices from the bottom up, with atomic-scale precision and molecular modularity. On the other hand, chiral-optical effects that depend on both spin- and orbital-angular momentum of photons could offer key advantages in all-optical and quantum information technologies. In particular, amplification of these chiral light-matter interactions using rationally designed plasmonic and dielectric nanomaterials provide approaches to manipulate light intensity, polarization, and phase in confined nanoscale geometries. Any technology that relies on optimal charge transport, or optical control and readout, including quantum devices for logic, sensing, and storage, may benefit from chiral quantum properties. These properties can be theoretically and experimentally investigated from a quantum information perspective, which has not yet been fully developed. There are uncharted implications for the quantum sciences once chiral couplings can be engineered to control the storage, transduction, and manipulation of quantum information. This forward-looking Review provides a survey of the experimental and theoretical fundamentals of chiral-influenced quantum effects and presents a vision for their possible future roles in enabling room-temperature quantum technologies.
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Affiliation(s)
- Clarice D. Aiello
- California
NanoSystems Institute, University of California,
Los Angeles, Los Angeles, California 90095, United States
- Department
of Electrical and Computer Engineering, University of California, Los Angeles, Los Angeles, California 90095, United States
| | - John M. Abendroth
- Laboratory
for Solid State Physics, ETH Zürich, Zürich 8093, Switzerland
| | - Muneer Abbas
- Department
of Microbiology, Howard University, Washington, D.C. 20059, United States
| | - Andrei Afanasev
- Department
of Physics, George Washington University, Washington, D.C. 20052, United States
| | - Shivang Agarwal
- Department
of Electrical and Computer Engineering, University of California, Los Angeles, Los Angeles, California 90095, United States
| | - Amartya S. Banerjee
- California
NanoSystems Institute, University of California,
Los Angeles, Los Angeles, California 90095, United States
- Department
of Materials Science and Engineering, University
of California, Los Angeles, Los Angeles, California 90095, United States
| | - David N. Beratan
- Departments
of Chemistry, Biochemistry, and Physics, Duke University, Durham, North Carolina 27708, United States
| | - Jason N. Belling
- California
NanoSystems Institute, University of California,
Los Angeles, Los Angeles, California 90095, United States
- Department
of Chemistry and Biochemistry, University
of California, Los Angeles, Los Angeles, California 90095, United States
| | - Bertrand Berche
- Laboratoire
de Physique et Chimie Théoriques, UMR Université de Lorraine-CNRS, 7019 54506 Vandœuvre les
Nancy, France
| | - Antia Botana
- Department
of Physics, Arizona State University, Tempe, Arizona 85287, United States
| | - Justin R. Caram
- Department
of Chemistry and Biochemistry, University
of California, Los Angeles, Los Angeles, California 90095, United States
| | - Giuseppe Luca Celardo
- Institute
of Physics, Benemerita Universidad Autonoma
de Puebla, Apartado Postal J-48, 72570, Mexico
- Department
of Physics and Astronomy, University of
Florence, 50019 Sesto Fiorentino, Italy
| | - Gianaurelio Cuniberti
- Institute
for Materials Science and Max Bergmann Center of Biomaterials, Dresden University of Technology, 01062 Dresden, Germany
| | - Aitzol Garcia-Etxarri
- Donostia
International Physics Center, Paseo Manuel de Lardizabal 4, 20018 Donostia, San Sebastian, Spain
- IKERBASQUE,
Basque Foundation for Science, Maria Diaz de Haro 3, 48013 Bilbao, Spain
| | - Arezoo Dianat
- Institute
for Materials Science and Max Bergmann Center of Biomaterials, Dresden University of Technology, 01062 Dresden, Germany
| | - Ismael Diez-Perez
- Department
of Chemistry, Faculty of Natural and Mathematical Sciences, King’s College London, 7 Trinity Street, London SE1 1DB, United Kingdom
| | - Yuqi Guo
- School
for Engineering of Matter, Transport and Energy, Arizona State University, Tempe, Arizona 85287, United States
| | - Rafael Gutierrez
- Institute
for Materials Science and Max Bergmann Center of Biomaterials, Dresden University of Technology, 01062 Dresden, Germany
| | - Carmen Herrmann
- Department
of Chemistry, University of Hamburg, 20146 Hamburg, Germany
| | - Joshua Hihath
- Department
of Electrical and Computer Engineering, University of California, Davis, Davis, California 95616, United States
| | - Suneet Kale
- School
of Molecular Sciences, Arizona State University, Tempe, Arizona 85287, United States
| | - Philip Kurian
- Quantum
Biology Laboratory, Graduate School, Howard
University, Washington, D.C. 20059, United States
| | - Ying-Cheng Lai
- School
of Electrical, Computer and Energy Engineering, Arizona State University, Tempe, Arizona 85287, United States
| | - Tianhan Liu
- California
NanoSystems Institute, University of California,
Los Angeles, Los Angeles, California 90095, United States
- Department
of Chemistry and Biochemistry, University
of California, Los Angeles, Los Angeles, California 90095, United States
| | - Alexander Lopez
- Escuela
Superior Politécnica del Litoral, ESPOL, Campus Gustavo Galindo Km. 30.5 Vía Perimetral, PO Box 09-01-5863, Guayaquil 090902, Ecuador
| | - Ernesto Medina
- Departamento
de Física, Colegio de Ciencias e Ingeniería, Universidad San Francisco de Quito, Av. Diego de Robles
y Vía Interoceánica, Quito 170901, Ecuador
| | - Vladimiro Mujica
- School
of Molecular Sciences, Arizona State University, Tempe, Arizona 85287, United States
- Kimika
Fakultatea, Euskal Herriko Unibertsitatea, 20080 Donostia, Euskadi, Spain
| | - Ron Naaman
- Department
of Chemical and Biological Physics, Weizmann
Institute of Science, Rehovot 76100, Israel
| | - Mohammadreza Noormandipour
- Department
of Electrical and Computer Engineering, University of California, Los Angeles, Los Angeles, California 90095, United States
- TCM Group,
Cavendish Laboratory, University of Cambridge, J.J. Thomson Avenue, Cambridge CB3 0HE, United Kingdom
| | - Julio L. Palma
- Department
of Chemistry, Pennsylvania State University, Lemont Furnace, Pennsylvania 15456, United States
| | - Yossi Paltiel
- Applied
Physics Department and the Center for Nano-Science and Nano-Technology, Hebrew University of Jerusalem, Jerusalem 91904, Israel
| | - William Petuskey
- School
of Molecular Sciences, Arizona State University, Tempe, Arizona 85287, United States
| | - João Carlos Ribeiro-Silva
- Laboratory
of Genetics and Molecular Cardiology, Heart Institute, University of São Paulo Medical School, 05508-900 São
Paulo, Brazil
| | - Juan José Saenz
- Donostia
International Physics Center, Paseo Manuel de Lardizabal 4, 20018 Donostia, San Sebastian, Spain
- IKERBASQUE,
Basque Foundation for Science, Maria Diaz de Haro 3, 48013 Bilbao, Spain
| | - Elton J. G. Santos
- Institute
for Condensed Matter Physics and Complex Systems, School of Physics
and Astronomy, The University of Edinburgh, Edinburgh EH9 3FD, United Kingdom
- Higgs Centre
for Theoretical Physics, The University
of Edinburgh, Edinburgh, EH9 3FD, United Kingdom
| | - Maria Solyanik-Gorgone
- Department
of Electrical and Computer Engineering, George Washington University, Washington, D.C. 20052, United States
| | - Volker J. Sorger
- Department
of Electrical and Computer Engineering, George Washington University, Washington, D.C. 20052, United States
| | - Dominik M. Stemer
- California
NanoSystems Institute, University of California,
Los Angeles, Los Angeles, California 90095, United States
- Department
of Materials Science and Engineering, University
of California, Los Angeles, Los Angeles, California 90095, United States
| | - Jesus M. Ugalde
- Kimika
Fakultatea, Euskal Herriko Unibertsitatea, 20080 Donostia, Euskadi, Spain
| | - Ana Valdes-Curiel
- California
NanoSystems Institute, University of California,
Los Angeles, Los Angeles, California 90095, United States
- Department
of Electrical and Computer Engineering, University of California, Los Angeles, Los Angeles, California 90095, United States
| | - Solmar Varela
- School
of Chemical Sciences and Engineering, Yachay
Tech University, 100119 Urcuquí, Ecuador
| | - David H. Waldeck
- Department
of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Michael R. Wasielewski
- Department
of Chemistry, Center for Molecular Quantum Transduction, and Institute
for Sustainability and Energy at Northwestern, Northwestern University, Evanston, Illinois 60208-3113, United States
| | - Paul S. Weiss
- California
NanoSystems Institute, University of California,
Los Angeles, Los Angeles, California 90095, United States
- Department
of Materials Science and Engineering, University
of California, Los Angeles, Los Angeles, California 90095, United States
- Department
of Chemistry and Biochemistry, University
of California, Los Angeles, Los Angeles, California 90095, United States
- Department
of Bioengineering, University of California,
Los Angeles, Los Angeles, California, 90095, United States
| | - Helmut Zacharias
- Center
for Soft Nanoscience, University of Münster, 48149 Münster, Germany
| | - Qing Hua Wang
- School
for Engineering of Matter, Transport and Energy, Arizona State University, Tempe, Arizona 85287, United States
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10
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Bai X, Cao Y, Xu Y, Huang W, Deng P, Tian X, Liu Z, Wang J, Tu J. Enhanced Photocatalytic hydrolysis performance of titanium disulfide nanosheets by chiral molecules loaded. Chemphyschem 2022; 23:e202200156. [PMID: 35393729 DOI: 10.1002/cphc.202200156] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2022] [Revised: 04/02/2022] [Indexed: 11/08/2022]
Abstract
The photoelectrochemical (PEC) water decomposition is a promising method to produce hydrogen from water. In order to improve the water decomposition efficiency of the PEC process, it is necessary to inhibit the generation of H 2 O 2 byproducts and reduce the overpotential required by cheap catalysts and a high current density. Studies have shown that coating the electrode with chiral molecules or chiral films can increase the hydrogen production and reduce the generation of H 2 O 2 byproducts. This is interpreted as the result of a chiral induced spin selectivity (CISS) effect, which induces a spin correlation between the electrons that are transferred to the anode. Here, we report the adsorption of chiral molecules onto titanium disulfide nanosheets. Firstly, titanium disulfide nanosheets were synthesized via thermal injection and then dispersed through ultrasonic crushing. This strategy combines the CISS effect with the plasma effect caused by the narrow bandgap of two-dimensional sulfur compounds to promote the PEC water decomposition with a high current density.
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Affiliation(s)
- Xuesong Bai
- Hainan University of China Tropical Agriculture: Hainan University, State Key Laboratory of Marine Resource Utilization in South China Sea, Renmin Road #58, Haikou, CHINA
| | - Yang Cao
- Qiongtai Normal University, State Key Laboratory of Marine Resource Utilization in South China Sea, CHINA
| | - Yueshan Xu
- Hainan University, State Key Laboratory of Marine Resource Utilization in South China Sea, CHINA
| | - Wei Huang
- Hainan University, State Key Laboratory of Marine Resource Utilization in South China Sea, CHINA
| | - Peilin Deng
- Hainan University, State Key Laboratory of Marine Resource Utilization in South China Sea, CHINA
| | - Xinlong Tian
- Hainan University, State Key Laboratory of Marine Resource Utilization in South China Sea, CHINA
| | - Zhongxin Liu
- Hainan University, State Key Laboratory of Marine Resource Utilization in South China Sea, CHINA
| | - Jieqiong Wang
- Hainan University, State Key Laboratory of Marine Resource Utilization in South China Sea, Renmin Road #58, 570228, Haikou, CHINA
| | - Jinchun Tu
- Hainan University, State Key Laboratory of Marine Resource Utilization in South China Sea, CHINA
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11
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Hunt C, Zhang Z, Ocean K, Jansonius RP, Abbas M, Dvorak DJ, Kurimoto A, Lees EW, Ghosh S, Turkiewicz A, Garcés Pineda FA, Fork DK, Berlinguette CP. Quantification of the Effect of an External Magnetic Field on Water Oxidation with Cobalt Oxide Anodes. J Am Chem Soc 2022; 144:733-739. [PMID: 35000393 DOI: 10.1021/jacs.1c08759] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Here, we quantify the effect of an external magnetic field (β) on the oxygen evolution reaction (OER) for a cobalt oxide|fluorine-doped tin oxide coated glass (CoOx|FTO) anode. A bespoke apparatus enables us to precisely determine the relationship between magnetic flux density (β) and OER activity at the surface of a CoOx|FTO anode. The apparatus includes a strong NdFeB magnet (βmax = 450 ± 1 mT) capable of producing a magnetic field of 371 ± 1 mT at the surface of the anode. The distance between the magnet and the anode surface is controlled by a linear actuator, enabling submillimeter distance positioning of the magnet relative to the anode surface. We couple this apparatus with a finite element analysis magnetic model that was validated by Hall probe measurements to determine the value of β at the anode surface. At the largest tested magnetic field strength of β = 371 ± 1 mT, a 4.7% increase in current at 1.5 V vs the normal hydrogen electrode (NHE) and a change in the Tafel slope of 14.5 mV/dec were observed. We demonstrate through a series of OER measurements at sequential values of β that the enhancement consists of two distinct regions. The possible use of this effect to improve the energy efficiency of commercial water electrolyzers is discussed, and major challenges pertaining to the accurate measurement of the phenomenon are demonstrated.
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Affiliation(s)
- Camden Hunt
- Department of Chemistry, The University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada.,Stewart Blusson Quantum Matter Institute, The University of British Columbia, 2355 East Mall, Vancouver, British Columbia V6T 1Z4, Canada
| | - Zishuai Zhang
- Department of Chemistry, The University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada
| | - Karry Ocean
- Department of Chemistry, The University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada
| | - Ryan P Jansonius
- Department of Chemistry, The University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada
| | - Mohamad Abbas
- Department of Chemical and Biological Engineering, The University of British Columbia, 2360 East Mall, Vancouver, British Columbia V6T 1Z3, Canada
| | - David J Dvorak
- Stewart Blusson Quantum Matter Institute, The University of British Columbia, 2355 East Mall, Vancouver, British Columbia V6T 1Z4, Canada
| | - Aiko Kurimoto
- Department of Chemistry, The University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada
| | - Eric W Lees
- Department of Chemical and Biological Engineering, The University of British Columbia, 2360 East Mall, Vancouver, British Columbia V6T 1Z3, Canada
| | - Supriya Ghosh
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Ari Turkiewicz
- Department of Chemistry, University of California, Berkeley, California 94720, United States
| | - Felipe A Garcés Pineda
- Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology (BIST), 43007 Tarragona, Spain
| | - David K Fork
- Google LLC., 1600 Amphitheatre Parkway, Mountain View, California 94043, United States
| | - Curtis P Berlinguette
- Department of Chemistry, The University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada.,Stewart Blusson Quantum Matter Institute, The University of British Columbia, 2355 East Mall, Vancouver, British Columbia V6T 1Z4, Canada.,Department of Chemical and Biological Engineering, The University of British Columbia, 2360 East Mall, Vancouver, British Columbia V6T 1Z3, Canada.,Canadian Institute for Advanced Research (CIFAR), 661 University Avenue, Toronto, Ontario M5G 1M1, Canada
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12
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Wang CZ, Mujica V, Lai YC. Spin Fano Resonances in Chiral Molecules: An Alternative Mechanism for the CISS Effect and Experimental Implications. NANO LETTERS 2021; 21:10423-10430. [PMID: 34846905 DOI: 10.1021/acs.nanolett.1c03770] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Experiments on spin transport through a chiral molecule demonstrated the attainment of significant spin polarization, demanding a theoretical explanation. We report the emergence of spin Fano resonances as a mechanism in the chiral-induced spin-selectivity (CISS) effect associated with transport through a chiral polyacetylene molecule. Initializing electrons through optical excitation, we derive the Fano resonance formula for the spin polarization. Computations reveal that quasidegeneracy is common in this complex molecular system. A remarkable phenomenon is the generation of pronounced spin Fano resonances due to the contributions of two near-degeneracy states. We also find that the Fano resonance width increases linearly with the coupling strength between the molecule and the lead. Our findings provide another mechanism to explain the experimental observations and lead to new insights into the role of the CISS effect in complex molecules from the perspective of transport and spin polarization resonance, paving the way for chiral molecule-based spintronics applications.
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Affiliation(s)
- Cheng-Zhen Wang
- School of Electrical, Computer and Energy Engineering, Arizona State University, Tempe, Arizona85287, United States
| | - Vladimiro Mujica
- School of Molecular Sciences, Arizona State University, Tempe, Arizona 85 287, United States
- Kimika FakultateaEuskal Herriko Unibertsitatea20080DonostiaEuskadiSpain
| | - Ying-Cheng Lai
- School of Electrical, Computer and Energy Engineering, Arizona State University, Tempe, Arizona85287, United States
- Department of Physics, Arizona State University, Tempe, Arizona 85 287, United States
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13
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Feng T, Wang Z, Zhang Z, Xue J, Lu H. Spin selectivity in chiral metal-halide semiconductors. NANOSCALE 2021; 13:18925-18940. [PMID: 34783816 DOI: 10.1039/d1nr06407j] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Controlling the spin states of freedom represents a significant challenge for the next-generation optoelectronic and spintronic devices. Chiral metal-halide semiconductors (MHS) have recently emerged as an important class of materials for spin-dependent photonic and electronic applications. In this Minireview, we first discussed the chemical and structural diversity of chiral MHS, highlighting the chirality formation mechanism. We then provided our current understanding on the spin-sensitive photophysical and transport process with a focus on how chirality enables the spin selectivity in chiral MHS. We summarized recent progress on the experimental demonstration of spin control in various photonic and spintronic devices. Finally, we discussed ongoing challenges and opportunities associated with chiral MHS.
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Affiliation(s)
- Tanglue Feng
- Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China (SAR).
| | - Zhiyu Wang
- Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China (SAR).
| | - Zixuan Zhang
- Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China (SAR).
| | - Jie Xue
- Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China (SAR).
| | - Haipeng Lu
- Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China (SAR).
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14
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Zhong H, Zhang Y, Deng J. Optically active porous hybrid particles constructed by alkynylated cellulose nanocrystals, helical substituted polyacetylene, and inorganic silica for enantio-differentiating towards naproxen. Chirality 2021; 34:48-60. [PMID: 34725862 DOI: 10.1002/chir.23382] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2021] [Revised: 09/29/2021] [Accepted: 10/15/2021] [Indexed: 11/08/2022]
Abstract
This article reports on a novel type of ternary chiral porous hybrid particles (TCPHPs) constructed by alkynylated cellulose nanocrystals (A-CNCs), helical substituted polyacetylene, and inorganic silica. The resulting TCPHPs combine the respective advantages of the three components. A-CNCs serve as stabilizer, co-monomer, and chiral source simultaneously and transfer their chirality to the resulting helical substituted polyacetylenes in the course of copolymerization with achiral acetylenic monomer following "sergeants and soldiers rule". Helical substituted polyacetylenes form chiral helical structures and thus endow TCPHPs with the anticipated optical activity. Inorganic silica constitutes the rigid framework and is covalently bonded with the organic components through hydrolysis of Si-O-Et groups. Phase separation between the organic and inorganic components renders TCPHPs with abundant pores. Scanning electron microscope (SEM) images confirm the formation of spherical particles with porous structures. Circular dichroism spectra demonstrate the optical activity of the chiral hybrid particles. The as-prepared TCPHPs exhibit capacity for enantio-differentiating performance towards chiral naproxen.
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Affiliation(s)
- Hai Zhong
- State Key Laboratory of Chemical Resource Engineering and College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing, China
| | - Yingjie Zhang
- State Key Laboratory of Chemical Resource Engineering and College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing, China
| | - Jianping Deng
- State Key Laboratory of Chemical Resource Engineering and College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing, China
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15
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Torres-Cavanillas R, Escorcia-Ariza G, Brotons-Alcázar I, Sanchis-Gual R, Mondal PC, Rosaleny LE, Giménez-Santamarina S, Sessolo M, Galbiati M, Tatay S, Gaita-Ariño A, Forment-Aliaga A, Cardona-Serra S. Reinforced Room-Temperature Spin Filtering in Chiral Paramagnetic Metallopeptides. J Am Chem Soc 2020; 142:17572-17580. [DOI: 10.1021/jacs.0c07531] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ramón Torres-Cavanillas
- ICMol, Universitat de València, C/Catedrático José Beltrán no. 2, Paterna, Valencia 46980, Spain
| | - Garin Escorcia-Ariza
- ICMol, Universitat de València, C/Catedrático José Beltrán no. 2, Paterna, Valencia 46980, Spain
| | - Isaac Brotons-Alcázar
- ICMol, Universitat de València, C/Catedrático José Beltrán no. 2, Paterna, Valencia 46980, Spain
| | - Roger Sanchis-Gual
- ICMol, Universitat de València, C/Catedrático José Beltrán no. 2, Paterna, Valencia 46980, Spain
| | - Prakash Chandra Mondal
- ICMol, Universitat de València, C/Catedrático José Beltrán no. 2, Paterna, Valencia 46980, Spain
| | - Lorena E. Rosaleny
- ICMol, Universitat de València, C/Catedrático José Beltrán no. 2, Paterna, Valencia 46980, Spain
| | | | - Michele Sessolo
- ICMol, Universitat de València, C/Catedrático José Beltrán no. 2, Paterna, Valencia 46980, Spain
| | - Marta Galbiati
- ICMol, Universitat de València, C/Catedrático José Beltrán no. 2, Paterna, Valencia 46980, Spain
| | - Sergio Tatay
- ICMol, Universitat de València, C/Catedrático José Beltrán no. 2, Paterna, Valencia 46980, Spain
| | - Alejandro Gaita-Ariño
- ICMol, Universitat de València, C/Catedrático José Beltrán no. 2, Paterna, Valencia 46980, Spain
| | - Alicia Forment-Aliaga
- ICMol, Universitat de València, C/Catedrático José Beltrán no. 2, Paterna, Valencia 46980, Spain
| | - Salvador Cardona-Serra
- ICMol, Universitat de València, C/Catedrático José Beltrán no. 2, Paterna, Valencia 46980, Spain
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16
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Cohen G, Galperin M. Green’s function methods for single molecule junctions. J Chem Phys 2020; 152:090901. [DOI: 10.1063/1.5145210] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Affiliation(s)
- Guy Cohen
- The Raymond and Beverley Sackler Center for Computational Molecular and Materials Science, Tel Aviv University, Tel Aviv 69978, Israel
- School of Chemistry, Tel Aviv University, Tel Aviv 69978, Israel
| | - Michael Galperin
- Department of Chemistry and Biochemistry, University of California San Diego, La Jolla, California 92093, USA
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17
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Schweicher G, Garbay G, Jouclas R, Vibert F, Devaux F, Geerts YH. Molecular Semiconductors for Logic Operations: Dead-End or Bright Future? ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2020; 32:e1905909. [PMID: 31965662 DOI: 10.1002/adma.201905909] [Citation(s) in RCA: 57] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/10/2019] [Revised: 11/18/2019] [Indexed: 05/26/2023]
Abstract
The field of organic electronics has been prolific in the last couple of years, leading to the design and synthesis of several molecular semiconductors presenting a mobility in excess of 10 cm2 V-1 s-1 . However, it is also started to recently falter, as a result of doubtful mobility extractions and reduced industrial interest. This critical review addresses the community of chemists and materials scientists to share with it a critical analysis of the best performing molecular semiconductors and of the inherent charge transport physics that takes place in them. The goal is to inspire chemists and materials scientists and to give them hope that the field of molecular semiconductors for logic operations is not engaged into a dead end. To the contrary, it offers plenty of research opportunities in materials chemistry.
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Affiliation(s)
- Guillaume Schweicher
- Laboratoire de chimie des polymères, Faculté des Sciences, Université Libre de Bruxelles (ULB) Boulevard du Triomphe, Brussels, 1050, Belgium
- Optoelectronics Group, Cavendish Laboratory, University of Cambridge, JJ Thomson Avenue, Cambridge, CB3 0HE, UK
| | - Guillaume Garbay
- Laboratoire de chimie des polymères, Faculté des Sciences, Université Libre de Bruxelles (ULB) Boulevard du Triomphe, Brussels, 1050, Belgium
| | - Rémy Jouclas
- Laboratoire de chimie des polymères, Faculté des Sciences, Université Libre de Bruxelles (ULB) Boulevard du Triomphe, Brussels, 1050, Belgium
| | - François Vibert
- Laboratoire de chimie des polymères, Faculté des Sciences, Université Libre de Bruxelles (ULB) Boulevard du Triomphe, Brussels, 1050, Belgium
| | - Félix Devaux
- Laboratoire de chimie des polymères, Faculté des Sciences, Université Libre de Bruxelles (ULB) Boulevard du Triomphe, Brussels, 1050, Belgium
| | - Yves H Geerts
- Laboratoire de chimie des polymères, Faculté des Sciences, Université Libre de Bruxelles (ULB) Boulevard du Triomphe, Brussels, 1050, Belgium
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18
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Abstract
Utilization of electron transfer methods for description of quantum transport is popular due to simplicity of the formulation and its ability to account for basic physics of electron exchange between the system and baths. At the same time, the necessity to go beyond simple golden rule-type expressions for rates was indicated in the literature and ad hoc formulations were proposed. Similarly, kinetic schemes for quantum transport beyond the usual second-order Lindblad/Redfield considerations were discussed. Here we utilize recently introduced the nonequilibrium Hubbard Green's function diagrammatic technique to analyze the construction of rates in open systems. We show that previous considerations for rates of second and fourth order can be obtained as a particular case of zero- and second-order Green's function diagrammatic series with bare diagrams. We discuss limitations of previous considerations, stress advantages of the Hubbard Green's function approach in constructing the rates, and indicate that standard dressing of the diagrams is a natural way to account for additional baths/degrees of freedom in the formulation of generalized expressions for the rates.
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Affiliation(s)
- Nicolas Bergmann
- Department of Chemistry , Technical University of Munich , D-85748 Garching , Germany
| | - Michael Galperin
- Department of Chemistry & Biochemistry , University of California San Diego , La Jolla , California 92093 , United States
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19
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Abstract
A general theory of the chiral induced spin selectivity (CISS) effect is presented. It is based on the fact that the spin-orbit (SO) coupling is small, a few meV, for the light atoms, which make up typical chiral molecules in experiments. We present a theorem based on the Onsager reciprocal principle, which states that the CISS effect vanishes when thermally averaging over all electron states. This zero result is avoided by the very nonthermal character of the incoming optically generated electrons in experimental realizations. Despite the small SO-coupling, the presence of accidental degeneracies in the molecular spectrum yields a sizable spin polarization. The CISS effect in the presence of magnetic leads is special. We prove that, in a situation with one magnetic lead, the other lead will become magnetized. This results from the interplay between the spin-orbit coupling in the chiral molecule and the magnetized lead. Numerical calculations for realistic chiral molecules confirm the theory.
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Affiliation(s)
- Sakse Dalum
- Niels Bohr Institute , University of Copenhagen , Copenhagen DK-2100 , Denmark
- Sino-Danish Center for Education and Research (SDC), Eastern Yanqihu Campus , University of Chinese Academy of Sciences , Huaibeizhen, Huairou Qu, Beijing 101408 , China
| | - Per Hedegård
- Niels Bohr Institute , University of Copenhagen , Copenhagen DK-2100 , Denmark
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20
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Fridman HT, Dehnel J, Yochelis S, Lifshitz E, Paltiel Y. Spin-Exciton Delocalization Enhancement in Multilayer Chiral Linker/Quantum Dot Structures. J Phys Chem Lett 2019; 10:3858-3862. [PMID: 31241942 DOI: 10.1021/acs.jpclett.9b01433] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The control of complex devices on the nanoscale is challenging. The development of nanoparticles, such as quantum dots, that serve as "artificial atoms" enables the manipulation of energy levels at the nanoscale. Using quantum dots and wet chemistry, multilayer structures with unique coupling properties can be realized. The coupling of such quantum dots is essential for several applications, such as parallel computing. Earlier work showed enhancement of the delocalization using covalent bonds and short linkers. Here, we demonstrate a way to achieve better coupling using helical chiral molecules that exhibit long spin-wave function delocalization. The delocalization is controlled by manipulation of the spin state using polarized light.
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Affiliation(s)
- Hanna T Fridman
- Applied Physics Department , The Hebrew University of Jerusalem , Bergmann Building , Safra Campus, Jerusalem 91904 , Israel
| | - Johanna Dehnel
- Applied Physics Department , The Hebrew University of Jerusalem , Bergmann Building , Safra Campus, Jerusalem 91904 , Israel
| | - Shira Yochelis
- Applied Physics Department , The Hebrew University of Jerusalem , Bergmann Building , Safra Campus, Jerusalem 91904 , Israel
| | - Efrat Lifshitz
- Applied Physics Department , The Hebrew University of Jerusalem , Bergmann Building , Safra Campus, Jerusalem 91904 , Israel
| | - Yossi Paltiel
- Applied Physics Department , The Hebrew University of Jerusalem , Bergmann Building , Safra Campus, Jerusalem 91904 , Israel
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21
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Abendroth JM, Stemer DM, Bloom BP, Roy P, Naaman R, Waldeck DH, Weiss PS, Mondal PC. Spin Selectivity in Photoinduced Charge-Transfer Mediated by Chiral Molecules. ACS NANO 2019; 13:4928-4946. [PMID: 31016968 DOI: 10.1021/acsnano.9b01876] [Citation(s) in RCA: 54] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Optical control and readout of electron spin and spin currents in thin films and nanostructures have remained attractive yet challenging goals for emerging technologies designed for applications in information processing and storage. Recent advances in room-temperature spin polarization using nanometric chiral molecular assemblies suggest that chemically modified surfaces or interfaces can be used for optical spin conversion by exploiting photoinduced charge separation and injection from well-coupled organic chromophores or quantum dots. Using light to drive photoexcited charge-transfer processes mediated by molecules with central or helical chirality enables indirect measurements of spin polarization attributed to the chiral-induced spin selectivity effect and of the efficiency of spin-dependent electron transfer relative to competitive relaxation pathways. Herein, we highlight recent approaches used to detect and to analyze spin selectivity in photoinduced charge transfer including spin-transfer torque for local magnetization, nanoscale charge separation and polarization, and soft ferromagnetic substrate magnetization- and chirality-dependent photoluminescence. Building on these methods through systematic investigation of molecular and environmental parameters that influence spin filtering should elucidate means to manipulate electron spins and photoexcited states for room-temperature optoelectronic and photospintronic applications.
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Affiliation(s)
- John M Abendroth
- California NanoSystems Institute , University of California, Los Angeles , Los Angeles , California 90095 , United States
- Department of Chemistry and Biochemistry , University of California, Los Angeles , Los Angeles , California 90095 , United States
| | - Dominik M Stemer
- California NanoSystems Institute , University of California, Los Angeles , Los Angeles , California 90095 , United States
- Department of Materials Science and Engineering , University of California, Los Angeles , Los Angeles , California 90095 , United States
| | - Brian P Bloom
- Department of Chemistry , University of Pittsburgh , Pittsburgh , Pennsylvania 15260 , United States
| | - Partha Roy
- Department of Chemistry , Central University of Rajasthan , Kishangarh 305817 Ajmer , India
| | - Ron Naaman
- Department of Chemical and Biological Physics , Weizmann Institute of Science , Rehovot 76100 , Israel
| | - David H Waldeck
- Department of Chemistry , University of Pittsburgh , Pittsburgh , Pennsylvania 15260 , United States
| | - Paul S Weiss
- California NanoSystems Institute , University of California, Los Angeles , Los Angeles , California 90095 , United States
- Department of Chemistry and Biochemistry , University of California, Los Angeles , Los Angeles , California 90095 , United States
- Department of Materials Science and Engineering , University of California, Los Angeles , Los Angeles , California 90095 , United States
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22
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Abendroth JM, Cheung KM, Stemer DM, El Hadri MS, Zhao C, Fullerton EE, Weiss PS. Spin-Dependent Ionization of Chiral Molecular Films. J Am Chem Soc 2019; 141:3863-3874. [PMID: 30734553 DOI: 10.1021/jacs.8b08421] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Spin selectivity in photo-emission from ferromagnetic substrates functionalized with chiral organic films was analyzed by ultraviolet photoelectron spectroscopy at room temperature. Using radiation with photon energy greater than the ionization potential of the adsorbed molecules, photoelectrons were collected that originated from both underlying ferromagnetic substrates and the organic films, with kinetic energies in the range of ca. 0-18 eV. We investigated chiral organic films composed of self-assembled monolayers of α-helical peptides and electrostatically adsorbed films of the protein, bovine serum albumin, with different α-helix and β-sheet contents. Ultraviolet photoelectron spectral widths were found to depend on substrate magnetization orientation and polarization, which we attribute to helicity-dependent molecular ionization cross sections arising from photoelectron impact, possibly resulting in spin-polarized holes. These interactions between spin-polarized photoelectrons and chiral molecules are physically manifested as differences in the measured photoionization energies of the chiral molecular films. Substrate magnetization-dependent ionization energies and work function values were deconvoluted using surface charge neutralization techniques, permitting the measurement of relative spin-dependent energy barriers to transmission through chiral organic films.
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Affiliation(s)
- John M Abendroth
- California NanoSystems Institute , University of California, Los Angeles , Los Angeles , California 90095 , United States.,Department of Chemistry & Biochemistry , University of California, Los Angeles , Los Angeles , California 90095 , United States
| | - Kevin M Cheung
- California NanoSystems Institute , University of California, Los Angeles , Los Angeles , California 90095 , United States.,Department of Chemistry & Biochemistry , University of California, Los Angeles , Los Angeles , California 90095 , United States
| | - Dominik M Stemer
- California NanoSystems Institute , University of California, Los Angeles , Los Angeles , California 90095 , United States.,Department of Materials Science & Engineering , University of California, Los Angeles , Los Angeles , California 90095 , United States
| | - Mohammed S El Hadri
- Center for Memory and Recording Research , University of California, San Diego , La Jolla , California 92093 , United States
| | - Chuanzhen Zhao
- California NanoSystems Institute , University of California, Los Angeles , Los Angeles , California 90095 , United States.,Department of Chemistry & Biochemistry , University of California, Los Angeles , Los Angeles , California 90095 , United States
| | - Eric E Fullerton
- Center for Memory and Recording Research , University of California, San Diego , La Jolla , California 92093 , United States
| | - Paul S Weiss
- California NanoSystems Institute , University of California, Los Angeles , Los Angeles , California 90095 , United States.,Department of Chemistry & Biochemistry , University of California, Los Angeles , Los Angeles , California 90095 , United States.,Department of Materials Science & Engineering , University of California, Los Angeles , Los Angeles , California 90095 , United States
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23
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Roy P, Kantor-Uriel N, Sunda AP. Nanoscale defolding influence of polypeptides in the charge-transfer process through an organic-inorganic nanohybrid system. NANOSCALE 2018; 10:11143-11149. [PMID: 29873379 DOI: 10.1039/c8nr03582b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
A biologically important polypeptide [with an alternate sequence of alanine (ALA) and 2-aminobutyric acid (AiB)] is used as a linker molecule to investigate the charge-transfer phenomenon between CdSe nanoparticle (NP) (diameter ∼6-7 nm) assemblies and gold (Au) substrates. The (ALA-AiB)n polypeptides, with varying chain lengths n = 5, 8, 11, were attached to the surface to form self-assembled monolayers (SAMs) through a thiol group located either at the N-terminal or C-terminal of the sequence. Temperature dependent photoluminescence (PL) spectra showed anomalous behavior in the quenching regime of CdSe NPs in the 237 K to 290 K region. In principle, the fluorescence intensity of any fluorophore decreases with a gradual increase in temperature, due to dominating non-radiative relaxation over radiative relaxation. PL spectral intensity follows this general trend from 77 K to 237 K for all chain lengths. For chain length n > 5 (n = 5 showed a kink, but the extent of the kink is negligible in comparison with n > 5) polypeptide-based monolayers, there is a sudden increase in fluorescence intensity above 237 K. This sudden increase is probed using molecular dynamics simulations which reveals that this unprecedented behavior arises due to interchain polypeptide interactions. An insertion of an alkyl chain with an almost similar length of peptide along with polypeptide (in a 3 : 1 ratio, in terms of concentration) diminishes the interchain polypeptide hydrogen-bonding interactions and manifests the normal trend of PL spectra.
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Affiliation(s)
- Partha Roy
- Department of Chemistry, School of Chemical Sciences & Pharmacy, Central University of Rajasthan, Ajmer 305817, India.
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Wang T, Luan ZZ, Ge JY, Liu L, Wu D, Lv ZP, Zuo JL, Sun S. Enhancing low-field magnetoresistance in magnetite nanoparticles via zinc substitution. Phys Chem Chem Phys 2018; 20:17245-17252. [DOI: 10.1039/c8cp00843d] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Zn-doping facilitates the alignment of magnetization direction of sub-10 nm Fe3O4 nanoparticles and enhances room temperature low-field magnetoresistance (LFMR).
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Affiliation(s)
- Tao Wang
- State Key Laboratory of Coordination Chemistry
- School of Chemistry and Chemical Engineering
- Collaborative Innovation Center of Advanced Microstructures
- Nanjing University
- Nanjing 210093
| | - Zhong-Zhi Luan
- National Laboratory of Solid State Microstructures, Department of Physics
- Collaborative Innovation Center of Advanced Microstructures
- Nanjing University
- Nanjing 210093
- P. R. China
| | - Jing-Yuan Ge
- State Key Laboratory of Coordination Chemistry
- School of Chemistry and Chemical Engineering
- Collaborative Innovation Center of Advanced Microstructures
- Nanjing University
- Nanjing 210093
| | - Ling Liu
- Institute of Theoretical and Computational Chemistry
- Key Laboratory of Mesoscopic Chemistry of the Ministry of Education (MOE)
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing, 210023
| | - Di Wu
- National Laboratory of Solid State Microstructures, Department of Physics
- Collaborative Innovation Center of Advanced Microstructures
- Nanjing University
- Nanjing 210093
- P. R. China
| | - Zhong-Peng Lv
- State Key Laboratory of Coordination Chemistry
- School of Chemistry and Chemical Engineering
- Collaborative Innovation Center of Advanced Microstructures
- Nanjing University
- Nanjing 210093
| | - Jing-Lin Zuo
- State Key Laboratory of Coordination Chemistry
- School of Chemistry and Chemical Engineering
- Collaborative Innovation Center of Advanced Microstructures
- Nanjing University
- Nanjing 210093
| | - Shouheng Sun
- Department of Chemistry
- Brown University
- Providence
- USA
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25
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Varade V, Markus T, Vankayala K, Friedman N, Sheves M, Waldeck DH, Naaman R. Bacteriorhodopsin based non-magnetic spin filters for biomolecular spintronics. Phys Chem Chem Phys 2018; 20:1091-1097. [DOI: 10.1039/c7cp06771b] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We discuss spin injection and spin valves, which are based on organic and biomolecules, that offer the possibility to overcome some of the limitations of solid-state devices, which are based on ferromagnetic metal electrodes.
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Affiliation(s)
- Vaibhav Varade
- Department of Chemical and Biological Physics
- Weizmann Institute of Science
- Rehovot
- Israel
| | - Tal Markus
- Department of Chemical and Biological Physics
- Weizmann Institute of Science
- Rehovot
- Israel
| | - Kiran Vankayala
- Department of Chemical and Biological Physics
- Weizmann Institute of Science
- Rehovot
- Israel
| | - Noga Friedman
- Department of Organic Chemistry
- Weizmann Institute of Science
- Rehovot
- Israel
| | - Mordechai Sheves
- Department of Organic Chemistry
- Weizmann Institute of Science
- Rehovot
- Israel
| | | | - Ron Naaman
- Department of Chemical and Biological Physics
- Weizmann Institute of Science
- Rehovot
- Israel
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26
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Mondal PC, Fontanesi C. Electrochemistry of Metalloproteins Attached through Functional Self-Assembled Monolayers on Gold and Ferromagnetic Electrodes. Chemphyschem 2017; 19:60-66. [PMID: 29124840 DOI: 10.1002/cphc.201701018] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2017] [Revised: 10/28/2017] [Indexed: 11/08/2022]
Abstract
We report the experimental results of a study of the electron-transfer processes of redox-active metalloproteins bound to mixed self-assembled monolayers (SAMs) on magnetic (nickel or ultrathin gold-coated nickel) or nonmagnetic (gold) electrodes. Metalloproteins, such as hemoglobin (Hb), Cytochrome C (Cyt C), and Cyt C oxidase, are attached through electrostatic interactions to the free carboxylate or imidazole groups present in the mixed SAMs. The formation of both mixed SAMs and SAM/metalloprotein heterostructures were confirmed by using advanced surface analysis techniques, such as polarization modulation infrared reflection absorption spectroscopy and aqueous contact angle measurements. Electrochemical measurements indicated a stronger electronic coupling between Hb and Cyt C oxidase and the mixed-SAM-coated gold or gold-coated-nickel electrodes, whereas a weaker coupling was found between the protein and the pure nickel electrode. Surface coverage and the electron-transfer rate constant were estimated from the cyclic voltammetry data.
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Affiliation(s)
- Prakash Chandra Mondal
- Department of Chemical Physics, Weizmann Institute of Science, Rehovot, 76100, Israel.,National Institute for Nanotechnology, University of Alberta, Edmonton, T6G 2M9, AB (Canada
| | - Claudio Fontanesi
- Department of Chemical Physics, Weizmann Institute of Science, Rehovot, 76100, Israel.,DIEF, University of Modena and Reggio Emilia, Via Vivarelli 10, 41125, Modena, Italy
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27
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Abendroth JM, Nakatsuka N, Ye M, Kim D, Fullerton EE, Andrews AM, Weiss PS. Analyzing Spin Selectivity in DNA-Mediated Charge Transfer via Fluorescence Microscopy. ACS NANO 2017; 11:7516-7526. [PMID: 28672111 DOI: 10.1021/acsnano.7b04165] [Citation(s) in RCA: 63] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Understanding spin-selective interactions between electrons and chiral molecules is critical to elucidating the significance of electron spin in biological processes and to assessing the potential of chiral assemblies for organic spintronics applications. Here, we use fluorescence microscopy to visualize the effects of spin-dependent charge transport in self-assembled monolayers of double-stranded DNA on ferromagnetic substrates. Patterned DNA arrays provide background regions for every measurement to enable quantification of substrate magnetization-dependent fluorescence due to the chiral-induced spin selectivity effect. Fluorescence quenching of photoexcited dye molecules bound within DNA duplexes is dependent upon the rate of charge separation/recombination upon photoexcitation and the efficiency of DNA-mediated charge transfer to the surface. The latter process is modulated using an external magnetic field to switch the magnetization orientation of the underlying ferromagnetic substrates. We discuss our results in the context of the current literature on the chiral-induced spin selectivity effect across various systems.
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Affiliation(s)
| | | | | | - Dokyun Kim
- Center for Memory and Recording Research, University of California, San Diego , La Jolla, California 92093, United States
| | - Eric E Fullerton
- Center for Memory and Recording Research, University of California, San Diego , La Jolla, California 92093, United States
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28
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Kiran V, Cohen SR, Naaman R. Structure dependent spin selectivity in electron transport through oligopeptides. J Chem Phys 2017. [DOI: 10.1063/1.4966237] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Affiliation(s)
- Vankayala Kiran
- Department of Chemical Physics, Weizmann Institute of Science, Rehovot NA 76100, Israel
| | - Sidney R. Cohen
- Department of Chemical Research Support, Weizmann Institute of Science, Rehovot 76100, Israel
| | - Ron Naaman
- Department of Chemical Physics, Weizmann Institute of Science, Rehovot NA 76100, Israel
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29
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Fabrication of Photomagnetic Carbon Surfaces via Redox Assembly. JOURNAL OF NANOTECHNOLOGY 2017. [DOI: 10.1155/2017/6058216] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
3-Aminophenylboronic acid (APBA) and the complex Ru(bpy)2(phendione)2+ (bpy = 2,2′-bipyridine, phendione = 1,10-phenanthroline-5,6-dione) were found to be useful building blocks for preparing photomagnetic carbon surfaces. Scanning tunneling microscopy (STM) showed that when APBA was diazotized in acidic sodium nitrite solutions and cathodically reduced with highly ordered pyrolytic graphite (HOPG) electrodes, nanoscale films formed on the electrodes. The resulting HOPG had strong affinities for phendione and Ru(bpy)2(phendione)2+ as the electrodes were biased in the presence of them, respectively, with voltages more negative than the cathodic peak potentials for phendione/phendiol and Ru(bpy)2(phendione)2+/Ru(bpy)2(phendiol)2+ (phendiol = 1,10-phenanthroline-5,6-diol). However, if APBA was excluded, the affinities did not exist. Boronate ester formation featured prominently in these intermolecular interactions. The average increments in the HOPG surface roughness contributed by APBA and Ru(bpy)2(phendione)2+ were roughly 1 : 2, suggesting that the reaction stoichiometry between APBA and Ru(bpy)2(phendione)2+ be 1 : 1. Ru(bpy)2(phendione)2+ could also be grafted to carbon nanotubes (CNTs) under conditions similar to those for the HOPG using ascorbate as sacrificial donor. The resulting CNTs and HOPG exhibited photomagnetism when exposed to the 473 nm light. The ruthenium complex was shown to be a room-temperature photomagnetism precursor, and APBA was shown to be an effective molecular bridge for the complex and carbon substrates.
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30
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Gracia J. Spin dependent interactions catalyse the oxygen electrochemistry. Phys Chem Chem Phys 2017; 19:20451-20456. [PMID: 28745744 DOI: 10.1039/c7cp04289b] [Citation(s) in RCA: 73] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The technological interest of oxygen reduction and evolution reactions, ORR and OER, for the clean use and storage of energy has resulted in the discovery of multiple catalysts; and the physical and catalytic properties of the most active compositions are only comprehensible with the consideration of magnetic interactions.
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Affiliation(s)
- J. Gracia
- SynCat@Beijing
- Synfuels China Technology Co. Ltd
- Beijing
- China
- SynCat@Differ
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31
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Galperin M. Photonics and spectroscopy in nanojunctions: a theoretical insight. Chem Soc Rev 2017; 46:4000-4019. [DOI: 10.1039/c7cs00067g] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Green function methods for photonics and spectroscopy in nanojunctions.
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Affiliation(s)
- Michael Galperin
- Department of Chemistry & Biochemistry
- University of California San Diego
- La Jolla
- USA
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32
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Mondal PC, Fontanesi C, Waldeck DH, Naaman R. Spin-Dependent Transport through Chiral Molecules Studied by Spin-Dependent Electrochemistry. Acc Chem Res 2016; 49:2560-2568. [PMID: 27797176 PMCID: PMC5112609 DOI: 10.1021/acs.accounts.6b00446] [Citation(s) in RCA: 86] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
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Molecular spintronics (spin + electronics), which aims to exploit
both the spin degree of freedom and the electron charge in molecular
devices, has recently received massive attention. Our recent experiments
on molecular spintronics employ chiral molecules which have the unexpected
property of acting as spin filters, by way of an effect we call “chiral-induced spin selectivity” (CISS). In this
Account, we discuss new types of spin-dependent electrochemistry measurements
and their use to probe the spin-dependent charge transport properties
of nonmagnetic chiral conductive polymers and biomolecules, such as
oligopeptides, L/D cysteine, cytochrome c, bacteriorhodopsin
(bR), and oligopeptide-CdSe nanoparticles (NPs) hybrid structures.
Spin-dependent electrochemical measurements were carried out by employing
ferromagnetic electrodes modified with chiral molecules used as the
working electrode. Redox probes were used either in solution or when
directly attached to the ferromagnetic electrodes. During the electrochemical
measurements, the ferromagnetic electrode was magnetized either with
its magnetic moment pointing “UP” or “DOWN”
using a permanent magnet (H = 0.5 T), placed underneath
the chemically modified ferromagnetic electrodes. The spin polarization
of the current was found to be in the range of 5–30%, even
in the case of small chiral molecules. Chiral films of the l- and d-cysteine tethered with a redox-active dye, toludin
blue O, show spin polarizarion that depends on the chirality. Because
the nickel electrodes are susceptible to corrosion, we explored the
effect of coating them with a thin gold overlayer. The effect of the
gold layer on the spin polarization of the electrons ejected from
the electrode was investigated. In addition, the role of the structure
of the protein on the spin selective transport was also studied as
a function of bias voltage and the effect of protein denaturation
was revealed. In addition to “dark” measurements, we
also describe photoelectrochemical measurements in which light is
used to affect the spin selective electron transport through the chiral
molecules. We describe how the excitation of a chromophore (such as
CdSe nanoparticles), which is attached to a chiral working electrode,
can flip the preferred spin orientation of the photocurrent, when
measured under the identical conditions. Thus, chirality-induced spin
polarization, when combined with light and magnetic field effects,
opens new avenues for the study of the spin transport properties of
chiral molecules and biomolecules and for creating new types of spintronic
devices in which light and molecular chirality provide new functions
and properties.
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Affiliation(s)
| | - Claudio Fontanesi
- Department
of Chemical Physics, Weizmann Institute of Science, Rehovot 76100, Israel
- Department
of Engineering, University of Modena and Reggio Emilia, Via Vivarelli
10, 41125 Modena, Italy
| | - David H. Waldeck
- Department
of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Ron Naaman
- Department
of Chemical Physics, Weizmann Institute of Science, Rehovot 76100, Israel
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33
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Liao J, Lu M, Tang D. Enhanced sensitivity of quartz crystal microbalance immunosensor via back-conjugation of biofunctionalized magnetic beads with an external magnetic field. Biochem Eng J 2016. [DOI: 10.1016/j.bej.2016.07.016] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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34
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Liang J, Deng J. Chiral porous hybrid particles constructed by helical substituted polyacetylene covalently bonded organosilica for enantioselective release. J Mater Chem B 2016; 4:6437-6445. [DOI: 10.1039/c6tb01757f] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
A new type of chiral porous hybrid particle was successfully prepared and applied in enantioselective release.
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Affiliation(s)
- Junya Liang
- State Key Laboratory of Chemical Resource Engineering and College of Materials Science and Engineering
- Beijing University of Chemical Technology
- Beijing 100029
- China
| | - Jianping Deng
- State Key Laboratory of Chemical Resource Engineering and College of Materials Science and Engineering
- Beijing University of Chemical Technology
- Beijing 100029
- China
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