1
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Bacaksiz C, Fyta M. Phthalocyanine Adsorbed on Monolayer CrI 3: Tailoring Their Magnetic Properties. ACS OMEGA 2024; 9:34589-34596. [PMID: 39157117 PMCID: PMC11325395 DOI: 10.1021/acsomega.4c02708] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/20/2024] [Revised: 06/28/2024] [Accepted: 07/08/2024] [Indexed: 08/20/2024]
Abstract
Metallo-phthalocyanines molecules, especially ironphthalocyanines (Fe-Pc), are often examined due to their rich chemical, magnetic, and optoelectronic features. Due to these, Fe-Pc molecules are promising for applications in gas sensors, field-effect transistors, organic LEDs, and data storage. Motivated by this potential, this study investigates Fe-Pc molecules adsorbed on a magnetic monolayer, CrI3. Using quantum-mechanical simulations, the aim of this work was to find pathways to selectively tune and engineer the magnetic and electronic properties of the molecules when they form hybrid complexes. The results quantitatively underline how adsorption alters the magnetic properties of the Fe-Pc molecules. Interestingly, the analysis points to changes in the molecular magnetic anisotropy when comparing the magnetic moment of the isolated molecule to that of the molecule/monolayer complex formed after adsorption. The presence of iodine vacancies was shown to enhance the magnetic interactions between the iron of the Fe-Pc molecule and the chromium of the monolayer. Our findings suggest ways to control oxygen capture-release properties through material choice and defect creation. Insights into the stability and charge density depletion on the molecule provide critical information for selective tuning of the magnetic properties and engineering of the functionalities of these molecule/material complexes.
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Affiliation(s)
- Cihan Bacaksiz
- Department of Physics & NANOlab Center of Excellence, University of Antwerp, Groenenborgerlaan 171, B-2020 Antwerp, Belgium
- Computational Biotechnology, RWTH Aachen University, Worringerweg 3, 70574 Aachen, Germany
| | - Maria Fyta
- Computational Biotechnology, RWTH Aachen University, Worringerweg 3, 70574 Aachen, Germany
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2
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Thupakula U, Bouju X, Castro-Esteban J, Dujardin E, Peña D, Joachim C. Planar bridging an atomically precise surface trench with a single molecular wire on an Au(1 1 1) surface. Chem Phys Lett 2022. [DOI: 10.1016/j.cplett.2022.140029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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3
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Arefi HH, Corken D, Tautz FS, Maurer RJ, Wagner C. Design Principles for Metastable Standing Molecules. THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2022; 126:6880-6891. [PMID: 35493697 PMCID: PMC9036527 DOI: 10.1021/acs.jpcc.2c01514] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/03/2022] [Revised: 03/15/2022] [Indexed: 06/14/2023]
Abstract
Molecular nanofabrication with a scanning probe microscope (SPM) is a promising route toward the prototyping of metastable functional molecular structures and devices which do not form spontaneously. The aspect of mechanical stability is crucial for such structures, especially if they extend into the third dimension vertical to the surface. A prominent example is freestanding molecules fabricated on a metal which can function as field emitters or electric field sensors. Improving the stability of such molecular configurations is an optimization task involving many degrees of freedom and therefore best tackled by computational nanostructure design. Here, we use density functional theory to study 3,4,9,10-perylene-tetracarboxylic dianhydride (PTCDA) standing on the Ag(111) surface as well as on the tip of a scanning probe microscope. We cast our results into a simple set of design principles for such metastable structures, the validity of which we subsequently demonstrate in two computational case studies. Our work proves the capabilities of computational nanostructure design in the field of metastable molecular structures and offers the intuition needed to fabricate new devices without tedious trial and error.
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Affiliation(s)
- Hadi H. Arefi
- Peter
Grünberg Institute (PGI-3), Forschungszentrum
Jülich, 52425 Jülich, Germany
- Jülich
Aachen Research Alliance (JARA), Fundamentals
of Future Information Technology, Jülich, 52425 Jülich, Germany
- Helmholtz-Zentrum
Berlin für Materialien und Energie, Hahn-Meitner-Platz 1, 14109 Berlin, Germany
| | - Daniel Corken
- Department
of Chemistry, University of Warwick, Gibbet Hill Road, CV4 7AL Coventry, U.K.
| | - F. Stefan Tautz
- Peter
Grünberg Institute (PGI-3), Forschungszentrum
Jülich, 52425 Jülich, Germany
- Jülich
Aachen Research Alliance (JARA), Fundamentals
of Future Information Technology, Jülich, 52425 Jülich, Germany
- Experimentalphysik
IV A, RWTH Aachen University, Otto-Blumenthal-Straße, 52074 Aachen, Germany
| | - Reinhard J. Maurer
- Department
of Chemistry, University of Warwick, Gibbet Hill Road, CV4 7AL Coventry, U.K.
| | - Christian Wagner
- Peter
Grünberg Institute (PGI-3), Forschungszentrum
Jülich, 52425 Jülich, Germany
- Jülich
Aachen Research Alliance (JARA), Fundamentals
of Future Information Technology, Jülich, 52425 Jülich, Germany
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4
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Liu B, Miao G, Zhong W, Huang X, Su N, Guo J, Wang W. Manipulating the Electronic and Magnetic Properties of Coordinated Nickel Atoms in Metal-Organic Frameworks by Hydrogenation. ACS NANO 2022; 16:2147-2153. [PMID: 35041376 DOI: 10.1021/acsnano.1c07902] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
In the pursuit of manipulating the properties of single atoms, the surface-supported metal-organic frameworks (MOFs) provide us opportunities to individually address the electronic and magnetic properties of coordinated metal atoms by scanning tunneling microscopy. Recently, we have synthesized Ni-TPyP (TPyP = 5,10,15,20-tetra-(4-pyridyl) porphyrin) networks with dinuclear Ni centers on a Au(111) surface, in which the top-Ni atoms are sitting above the molecular plane. Here, we investigate the top-Ni atoms and their hydrogenated derivatives by low-temperature scanning tunneling microscopy and spectroscopy, and show that the electronic and magnetic states of top-Ni atoms can be manipulated by hydrogen adsorption. Specifically, by fitting the spin-flip spectra in vertical magnetic field, we find the spin state of top-Ni atoms is tuned from S = 1/2 to S = 1 by attaching one H atom and S = 3/2 by attaching two H atoms. Our work demonstrates atomic-scale control over the electronic and magnetic properties of coordinated metal atoms in a surface-supported MOF.
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Affiliation(s)
- Bing Liu
- Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Guangyao Miao
- Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Weiliang Zhong
- Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Xiaochun Huang
- Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Nuoyu Su
- Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Jiandong Guo
- Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- Songshan Lake Materials Laboratory, Dongguan, Guangdong 523808, China
- Beijing Academy of Quantum Information Sciences, Beijing 100193, China
| | - Weihua Wang
- Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- Songshan Lake Materials Laboratory, Dongguan, Guangdong 523808, China
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5
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Zhu L, Li B, Dong L, Feng W, Zhao AD, Wang B. Controlling metalation reaction of phthalocyanine with cobalt at single-molecule level on Au(111) surface. CHINESE J CHEM PHYS 2021. [DOI: 10.1063/1674-0068/cjcp22105098] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Affiliation(s)
- Liang Zhu
- Hefei National Laboratory for Physical Sciences at the Microscale and Synergetic Innovation Center of Quantum Information & Quantum Physics, University of Science and Technology of China, Hefei 230026, China
| | - Bin Li
- Hefei National Laboratory for Physical Sciences at the Microscale and Synergetic Innovation Center of Quantum Information & Quantum Physics, University of Science and Technology of China, Hefei 230026, China
| | - Lei Dong
- Hefei National Laboratory for Physical Sciences at the Microscale and Synergetic Innovation Center of Quantum Information & Quantum Physics, University of Science and Technology of China, Hefei 230026, China
| | - Wei Feng
- Hefei National Laboratory for Physical Sciences at the Microscale and Synergetic Innovation Center of Quantum Information & Quantum Physics, University of Science and Technology of China, Hefei 230026, China
| | - Ai-di Zhao
- Hefei National Laboratory for Physical Sciences at the Microscale and Synergetic Innovation Center of Quantum Information & Quantum Physics, University of Science and Technology of China, Hefei 230026, China
| | - Bing Wang
- Hefei National Laboratory for Physical Sciences at the Microscale and Synergetic Innovation Center of Quantum Information & Quantum Physics, University of Science and Technology of China, Hefei 230026, China
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6
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Liu B, Zhang S, Miao G, Guo J, Meng S, Wang W. Inspecting the nonbonding and antibonding orbitals in a surface-supported metal-organic framework. Chem Commun (Camb) 2021; 57:4580-4583. [PMID: 33956023 DOI: 10.1039/d1cc00506e] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
By using low-temperature scanning tunnelling microscopy and spectroscopy, ligand field theory and density functional theory calculations, we revealed the spatial distribution and energy separation of the nonbonding and antibonding orbitals associated with the top-Ni atoms in a surface-supported Ni-TPyP metal-organic framework with dinuclear coordination centres.
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Affiliation(s)
- Bing Liu
- Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China. and School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100190, China
| | - Shengjie Zhang
- Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China. and School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100190, China
| | - Guangyao Miao
- Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China. and School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100190, China
| | - Jiandong Guo
- Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China. and School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100190, China and Songshan Lake Materials Laboratory, Dongguan, Guangdong 523808, China
| | - Sheng Meng
- Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China. and School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100190, China and Songshan Lake Materials Laboratory, Dongguan, Guangdong 523808, China
| | - Weihua Wang
- Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China. and Songshan Lake Materials Laboratory, Dongguan, Guangdong 523808, China
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7
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Sarmah A, Hobza P. Mechanical force-induced manipulation of electronic conductance in a spin-crossover complex: a simple approach to molecular electronics. NANOSCALE ADVANCES 2020; 2:2907-2913. [PMID: 36132398 PMCID: PMC9417810 DOI: 10.1039/d0na00285b] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/23/2020] [Accepted: 05/14/2020] [Indexed: 06/15/2023]
Abstract
The atomic-scale technological sophistication from the last half-decade provides new avenues for the atom-by-atom fabrication of nanostructures with extraordinary precision. This urges the appraisal of the fabrication scheme layout for a modular nanoelectronic device based on an individual molecular complex. The mechanical force-induced distortion to the metal coordination sphere triggers a low-spin (LS) to high-spin (HS) electronic transition in the complex. The controlled structural distortions (relative to a specific bond-angle) are deemed to be the switching parameter for the observed spin-transitions. Mechanical stretching is the key to engineering a spin-state switch in the proposed molecular device. The spin-dependent reversible variation in the electronic conductance concurrent to the unique spin-states can be understood from the state-of-the-art Nonequilibrium Green's Function (NEGF) calculations. Combined with NEGF calculations, the DFT study further provides a qualitative perception of the electronic conductance in the two-terminal device architecture. From the transport calculations, there is also evidence of considerable fluctuation in the spin-dependent electronic conductance at the molecular junction with relative variations in the scattering limit. Subsequently, the present study shows significant advances in the transmission probabilities for the high-spin state of the Fe(ii) complex. The results empower the progress of nanoelectronics at the single molecule level.
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Affiliation(s)
- Amrit Sarmah
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences Flemingovo nam. 2 CZ-16610 Prague 6 Czech Republic +420731015016
- Department of Physical Chemistry, Palacký University CZ-77146 Olomouc Czech Republic
| | - Pavel Hobza
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences Flemingovo nam. 2 CZ-16610 Prague 6 Czech Republic +420731015016
- Department of Physical Chemistry, Palacký University CZ-77146 Olomouc Czech Republic
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8
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Qin L, Huang Y, Xia F, Wang L, Ning J, Chen H, Wang X, Zhang W, Peng Y, Liu Q, Zhang Z. 5 nm Nanogap Electrodes and Arrays by Super-resolution Laser Lithography. NANO LETTERS 2020; 20:4916-4923. [PMID: 32559096 DOI: 10.1021/acs.nanolett.0c00978] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The development of reliable, mass-produced, and cost-effective sub-10 nm nanofabrication technology leads to an unprecedented level of integration of photonic devices. In this work, we describe the development of a laser direct writing (LDW) lithography technique with ∼5 nm feature size, which is about 1/55 of the optical diffraction limit of the LDW system (405 nm laser and 0.9 NA objective), and the realization of 5 nm nanogap electrodes. This LDW lithography exhibits an attractive capability of well-site control and mass production of ∼5 × 105 nanogap electrodes per hour, breaking the trade-off between resolution and throughput in a nanofabrication technique. Nanosensing chips have been demonstrated with the as-obtained nanogap electrodes, where controllable surface enhancement Raman scattering of rhodamine 6G has been realized via adjusting the gap width and, especially, the applied bias voltages. Our results establish that such a low-cost and high-efficient lithography technology has great potential to fabricate compact integrated circuits and biochips.
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Affiliation(s)
- Liang Qin
- Key Laboratory of Nanodevices and Applications, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences (CAS), Suzhou 215123, China
| | - Yuanqing Huang
- Key Laboratory of Nanodevices and Applications, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences (CAS), Suzhou 215123, China
- CAS Center for Excellence in Nanoscience, Key Laboratory of Nanosystem and Hierarchical Fabrication, National Center for Nanoscience and Technology & University of Chinese Academy of Sciences, Beijing 100190, China
- School of Physical Sciences and Technology, Electron Microscopy Centre of Lanzhou University, Lab of Magnetism and Magnetic Materials of the Ministry of Education, Lanzhou University, Lanzhou 730000, China
| | - Feng Xia
- College of Physics, Qingdao University, Qingdao 266000, China
| | - Lei Wang
- CAS Center for Excellence in Nanoscience, Key Laboratory of Nanosystem and Hierarchical Fabrication, National Center for Nanoscience and Technology & University of Chinese Academy of Sciences, Beijing 100190, China
| | - Jiqiang Ning
- Key Laboratory of Nanodevices and Applications, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences (CAS), Suzhou 215123, China
| | - Hongmei Chen
- Key Laboratory of Nanodevices and Applications, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences (CAS), Suzhou 215123, China
| | - Xu Wang
- Key Laboratory of Nanodevices and Applications, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences (CAS), Suzhou 215123, China
| | - Wei Zhang
- Suzhou HWN Nanotec. Co., LTD., Suzhou 215123, China
| | - Yong Peng
- School of Physical Sciences and Technology, Electron Microscopy Centre of Lanzhou University, Lab of Magnetism and Magnetic Materials of the Ministry of Education, Lanzhou University, Lanzhou 730000, China
| | - Qian Liu
- CAS Center for Excellence in Nanoscience, Key Laboratory of Nanosystem and Hierarchical Fabrication, National Center for Nanoscience and Technology & University of Chinese Academy of Sciences, Beijing 100190, China
| | - Ziyang Zhang
- Key Laboratory of Nanodevices and Applications, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences (CAS), Suzhou 215123, China
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9
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Organic Spintronics: A Theoretical Investigation of a Graphene-Porphyrin Based Nanodevice. MAGNETOCHEMISTRY 2020. [DOI: 10.3390/magnetochemistry6020027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Spintronics is one of the most exciting applications of graphene-based devices. In this work Density Functional Theory is used to study a nanojunction consisting of two semi-infinite graphene electrodes contacted with an iron-porphyrin (FeP) molecule, which plays the role of spin filter for the incoming unpolarized electrons. The graphene-FeP contact closely resembles the recently synthesized porphyrin-decorated graphene [He et al., Nat. Chem. 2017, 9, 33–38]. The analysis of the spectral properties of the system shows a variation of the orbital occupancy with respect to the isolated FeP molecule and an hybridization with the delocalized states of the substrate, while the overall magnetic moment remains unchanged. Doping the electrodes with boron or nitrogen atoms induces a relevant rearrangement in the electronic structure of the junction. Upon B doping the current becomes significantly spin polarized, while N doping induces a marked Negative Differential Resistivity effect. We have also investigated the possible exploitation of the FeP junction as a gas sensor device. We demonstrate that the interaction of CO and O2 molecules with the Fe atom, while being strong enough to be stable at room temperature (2.0 eV and 1.1 eV, respectively), induces only minor effects on the electronic properties of the junction. Interestingly, a quenching of the spin polarization of the current is observed in the B-doped system.
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10
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Franco-Cañellas A, Duhm S, Gerlach A, Schreiber F. Binding and electronic level alignment of π-conjugated systems on metals. REPORTS ON PROGRESS IN PHYSICS. PHYSICAL SOCIETY (GREAT BRITAIN) 2020; 83:066501. [PMID: 32101802 DOI: 10.1088/1361-6633/ab7a42] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
We review the binding and energy level alignment of π-conjugated systems on metals, a field which during the last two decades has seen tremendous progress both in terms of experimental characterization as well as in the depth of theoretical understanding. Precise measurements of vertical adsorption distances and the electronic structure together with ab initio calculations have shown that most of the molecular systems have to be considered as intermediate cases between weak physisorption and strong chemisorption. In this regime, the subtle interplay of different effects such as covalent bonding, charge transfer, electrostatic and van der Waals interactions yields a complex situation with different adsorption mechanisms. In order to establish a better understanding of the binding and the electronic level alignment of π-conjugated molecules on metals, we provide an up-to-date overview of the literature, explain the fundamental concepts as well as the experimental techniques and discuss typical case studies. Thereby, we relate the geometric with the electronic structure in a consistent picture and cover the entire range from weak to strong coupling.
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Affiliation(s)
- Antoni Franco-Cañellas
- Institut für Angewandte Physik, Universität Tübingen, Auf der Morgenstelle 10, 72076 Tübingen, Germany
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11
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Montenegro-Pohlhammer N, Urzúa-Leiva R, Páez-Hernández D, Cárdenas-Jirón G. Spin-filter transport and magnetic properties in a binuclear Cu(ii) expanded porphyrin based molecular junction. Dalton Trans 2019; 48:8418-8426. [PMID: 31115414 DOI: 10.1039/c9dt01312a] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Although the magnetic and transport properties of molecular junction systems composed of metalled porphyrins or phthalocyanines have been broadly studied in recent years, to date no studies have been devoted to evaluate the aforementioned properties in junction systems featuring metalled expanded porphyrins as active elements. The present work reports a detailed theoretical study of the magnetic and electronic transport properties of the recently synthesized dinuclear Cu(ii)-naphthoisoamethyrin complex (PyCu2). This is the first work on performing these kinds of studies using a magnetically coupled metallic expanded porphyrin as a molecular kernel. DFT and wave function-based methods have been used to determine the nature of the magnetic interaction between the metallic centres, characterized by the exchange coupling constant J, showing that although this was found to be weakly antiferromagnetic, after an exhaustive analysis it turns out that the coupling has a ferromagnetic nature with a value of J = 14.2 cm-1. Once the magnetic ground state of PyCu2 was rigorously established, the spin resolved transport properties of the device composed of the expanded porphyrin attached to two gold nano-wires were studied by means of the combination of DFT and the nonequilibrium Green's function formalism, in order to explore PyCu2 prospects as a possible spintronic device.
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Affiliation(s)
- Nicolás Montenegro-Pohlhammer
- Laboratory of Theoretical Chemistry, Faculty of Chemistry and Biology, University of Santiago de Chile (USACH), 9170022, Santiago, Chile.
| | - Rodrigo Urzúa-Leiva
- Laboratory of Theoretical Chemistry, Faculty of Chemistry and Biology, University of Santiago de Chile (USACH), 9170022, Santiago, Chile.
| | - Dayán Páez-Hernández
- Relativistic Molecular Physics Group (ReMoPh), Universidad Andrés Bello, República 275, Santiago, Chile
| | - Gloria Cárdenas-Jirón
- Laboratory of Theoretical Chemistry, Faculty of Chemistry and Biology, University of Santiago de Chile (USACH), 9170022, Santiago, Chile.
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12
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Li J, Solianyk L, Schmidt N, Baker B, Gottardi S, Moreno Lopez JC, Enache M, Monjas L, van der Vlag R, Havenith RWA, Hirsch AKH, Stöhr M. Low-Dimensional Metal-Organic Coordination Structures on Graphene. THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2019; 123:12730-12735. [PMID: 31156737 PMCID: PMC6541427 DOI: 10.1021/acs.jpcc.9b00326] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/11/2019] [Revised: 04/26/2019] [Indexed: 06/09/2023]
Abstract
We report the formation of one- and two-dimensional metal-organic coordination structures from para-hexaphenyl-dicarbonitrile (NC-Ph6-CN) molecules and Cu atoms on graphene epitaxially grown on Ir(111). By varying the stoichiometry between the NC-Ph6-CN molecules and Cu atoms, the dimensionality of the metal-organic coordination structures could be tuned: for a 3:2 ratio, a two-dimensional hexagonal porous network based on threefold Cu coordination was observed, while for a 1:1 ratio, one-dimensional chains based on twofold Cu coordination were formed. The formation of metal-ligand bonds was supported by imaging the Cu atoms within the metal-organic coordination structures with scanning tunneling microscopy. Scanning tunneling spectroscopy measurements demonstrated that the electronic properties of NC-Ph6-CN molecules and Cu atoms were different between the two-dimensional porous network and one-dimensional molecular chains.
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Affiliation(s)
- Jun Li
- Zernike
Institute for Advanced Materials, University
of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
| | - Leonid Solianyk
- Zernike
Institute for Advanced Materials, University
of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
| | - Nico Schmidt
- Zernike
Institute for Advanced Materials, University
of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
| | - Brian Baker
- Zernike
Institute for Advanced Materials, University
of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
| | - Stefano Gottardi
- Zernike
Institute for Advanced Materials, University
of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
| | - Juan Carlos Moreno Lopez
- Zernike
Institute for Advanced Materials, University
of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
- Faculty
of Physics, University of Vienna, Strudlhofgasse 4, 1090 Vienna, Austria
| | - Mihaela Enache
- Zernike
Institute for Advanced Materials, University
of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
| | - Leticia Monjas
- Stratingh
Institute for Chemistry, University of Groningen, Nijenborgh 7, 9747 AG Groningen, The Netherlands
| | - Ramon van der Vlag
- Stratingh
Institute for Chemistry, University of Groningen, Nijenborgh 7, 9747 AG Groningen, The Netherlands
| | - Remco W. A. Havenith
- Zernike
Institute for Advanced Materials, University
of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
- Stratingh
Institute for Chemistry, University of Groningen, Nijenborgh 7, 9747 AG Groningen, The Netherlands
- Ghent Quantum
Chemistry Group, University of Ghent, 9000 Ghent, Belgium
| | - Anna K. H. Hirsch
- Stratingh
Institute for Chemistry, University of Groningen, Nijenborgh 7, 9747 AG Groningen, The Netherlands
- Helmholtz
Institute
for Pharmaceutical Research Saarland (HIPS)—Helmholtz Centre
for Infection Research (HZI), Department of Drug Design and Optimization, Campus Building E8.1, 66123 Saarbrücken, Germany
- Department
of Pharmacy, Saarland University, Campus Building E8.1, 66123 Saarbrücken, Germany
| | - Meike Stöhr
- Zernike
Institute for Advanced Materials, University
of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
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13
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Taniguchi M. Paving the way to single-molecule chemistry through molecular electronics. Phys Chem Chem Phys 2019; 21:9641-9650. [PMID: 31062773 DOI: 10.1039/c9cp00264b] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Since our understanding of single-molecule junctions, in which single molecules are connected between nanoelectrodes, has deepened, we have paved the way to single-molecule chemistry. Herein, we review fundamental properties, including the number of molecules connected to the electrode, their structure and type, the bonding force between the single molecule and electrode and the thermopower and quantum interference in single-molecule junctions. Additionally, we review the application of single-molecule junctions to biomolecules. Finally, we explore single-molecule chemical reaction analysis, which is one direction of single-molecule junction research.
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Affiliation(s)
- Masateru Taniguchi
- The Institute of Scientific and Industrial Research, Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan.
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14
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Li S, Czap G, Wang H, Wang L, Chen S, Yu A, Wu R, Ho W. Bond-Selected Photodissociation of Single Molecules Adsorbed on Metal Surfaces. PHYSICAL REVIEW LETTERS 2019; 122:077401. [PMID: 30848644 DOI: 10.1103/physrevlett.122.077401] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2018] [Revised: 12/02/2018] [Indexed: 06/09/2023]
Abstract
We report the photoassisted activation of selected C─H bonds in individual molecules adsorbed on metal surfaces within the junction of a scanning tunneling microscope. Photons can couple to the C─H bond activation of specific hydrocarbons through a resonant photoassisted tunneling process. The molecule to be activated can be selected by positioning the tip with subangstrom resolution. Furthermore, structural tomography of the molecule and its dissociation products are imaged at different heights by the inelastic tunneling probe. The demonstration of single bond dissociation induced by resonant photoassisted tunneling electrons implies the attainment of atomic scale spatial resolution for bond-selected photochemistry.
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Affiliation(s)
- Shaowei Li
- Department of Physics and Astronomy, University of California, Irvine, California 92697-4575, USA
| | - Gregory Czap
- Department of Physics and Astronomy, University of California, Irvine, California 92697-4575, USA
| | - Hui Wang
- Department of Physics and Astronomy, University of California, Irvine, California 92697-4575, USA
| | - Likun Wang
- Department of Physics and Astronomy, University of California, Irvine, California 92697-4575, USA
| | - Siyu Chen
- Department of Physics and Astronomy, University of California, Irvine, California 92697-4575, USA
| | - Arthur Yu
- Department of Physics and Astronomy, University of California, Irvine, California 92697-4575, USA
| | - Ruqian Wu
- Department of Physics and Astronomy, University of California, Irvine, California 92697-4575, USA
| | - W Ho
- Department of Physics and Astronomy, University of California, Irvine, California 92697-4575, USA
- Department of Chemistry, University of California, Irvine, California 92697-2025, USA
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15
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Nguyen D, Goings JJ, Nguyen HA, Lyding J, Li X, Gruebele M. Orientation-dependent imaging of electronically excited quantum dots. J Chem Phys 2018; 148:064701. [DOI: 10.1063/1.5012784] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Affiliation(s)
- Duc Nguyen
- Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA
- Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA
| | - Joshua J. Goings
- Department of Chemistry, University of Washington at Seattle, Seattle, Washington 98195, USA
| | - Huy A. Nguyen
- Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA
- Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA
| | - Joseph Lyding
- Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA
- Department of Electrical and Computer Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA
| | - Xiaosong Li
- Department of Chemistry, University of Washington at Seattle, Seattle, Washington 98195, USA
| | - Martin Gruebele
- Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA
- Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA
- Department of Physics, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA
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16
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Zou D, Zhao W, Cui B, Li D, Liu D. Adsorption of gas molecules on a manganese phthalocyanine molecular device and its possibility as a gas sensor. Phys Chem Chem Phys 2018; 20:2048-2056. [DOI: 10.1039/c7cp06760g] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A theoretical investigation of the gas detection performance of manganese(ii) phthalocyanine (MnPc) molecular junctions for six different gases (NO, CO, O2, CO2, NO2, and NH3) is executed through a non-equilibrium Green's function technique in combination with spin density functional theory.
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Affiliation(s)
- Dongqing Zou
- School of Physics
- State Key Laboratory of Crystal Materials
- Shandong University
- Jinan 250100
- People's Republic of China
| | - Wenkai Zhao
- School of Physics and Optoelectronics Engineering
- Ludong University
- Yantai 264025
- People's Republic of China
| | - Bin Cui
- School of Physics
- State Key Laboratory of Crystal Materials
- Shandong University
- Jinan 250100
- People's Republic of China
| | - Dongmei Li
- School of Physics
- State Key Laboratory of Crystal Materials
- Shandong University
- Jinan 250100
- People's Republic of China
| | - Desheng Liu
- School of Physics
- State Key Laboratory of Crystal Materials
- Shandong University
- Jinan 250100
- People's Republic of China
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17
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Li R, Li N, Wang H, Weismann A, Zhang Y, Hou S, Wu K, Wang Y. Tuning the spin-related transport properties of FePc on Au(111) through single-molecule chemistry. Chem Commun (Camb) 2018; 54:9135-9138. [PMID: 30059079 DOI: 10.1039/c8cc02994f] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Tuning the spin-related transport properties of FePc on Au(111) through single-molecule chemistry.
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Affiliation(s)
- Ruoning Li
- Key Laboratory for the Physics and Chemistry of Nanodevices
- Department of Electronics
- Peking University
- Beijing 100871
- China
| | - Na Li
- Key Laboratory for the Physics and Chemistry of Nanodevices
- Department of Electronics
- Peking University
- Beijing 100871
- China
| | - Hao Wang
- Key Laboratory for the Physics and Chemistry of Nanodevices
- Department of Electronics
- Peking University
- Beijing 100871
- China
| | - Alexander Weismann
- Institut für Experimentelle und Angewandte Physik
- Christian-Albrechts-Universität zu Kiel
- 24098 Kiel
- Germany
| | - Yajie Zhang
- Key Laboratory for the Physics and Chemistry of Nanodevices
- Department of Electronics
- Peking University
- Beijing 100871
- China
| | - Shimin Hou
- Key Laboratory for the Physics and Chemistry of Nanodevices
- Department of Electronics
- Peking University
- Beijing 100871
- China
| | - Kai Wu
- BNLMS
- College of Chemistry and Molecular Engineering
- Peking University
- Beijing 100871
- China
| | - Yongfeng Wang
- Key Laboratory for the Physics and Chemistry of Nanodevices
- Department of Electronics
- Peking University
- Beijing 100871
- China
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18
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Taniguchi M. Single-Molecule Analysis Methods Using Nanogap Electrodes and Their Application to DNA Sequencing Technologies. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2017. [DOI: 10.1246/bcsj.20170224] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- Masateru Taniguchi
- The Institute of Scientific and Industrial Research, Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka 567-0047
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19
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Urgel JI, Hayashi H, Di Giovannantonio M, Pignedoli CA, Mishra S, Deniz O, Yamashita M, Dienel T, Ruffieux P, Yamada H, Fasel R. On-Surface Synthesis of Heptacene Organometallic Complexes. J Am Chem Soc 2017; 139:11658-11661. [DOI: 10.1021/jacs.7b05192] [Citation(s) in RCA: 71] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- José I. Urgel
- Empa, Swiss Federal Laboratories for Material Science and Technology, 8600 Dübendorf, Switzerland
| | - Hironobu Hayashi
- Graduate
School of Materials Science, Nara Institute of Science and Technology (NAIST), 8916-5 Takayama-cho, Ikoma 630-0192, Japan
| | - Marco Di Giovannantonio
- Empa, Swiss Federal Laboratories for Material Science and Technology, 8600 Dübendorf, Switzerland
| | - Carlo A. Pignedoli
- NCCR MARVEL, Empa, Swiss Federal Laboratories for Material Science and Technology, 8600 Dübendorf, Switzerland
| | - Shantanu Mishra
- Empa, Swiss Federal Laboratories for Material Science and Technology, 8600 Dübendorf, Switzerland
| | - Okan Deniz
- Empa, Swiss Federal Laboratories for Material Science and Technology, 8600 Dübendorf, Switzerland
| | - Masataka Yamashita
- Graduate
School of Materials Science, Nara Institute of Science and Technology (NAIST), 8916-5 Takayama-cho, Ikoma 630-0192, Japan
| | - Thomas Dienel
- Empa, Swiss Federal Laboratories for Material Science and Technology, 8600 Dübendorf, Switzerland
| | - Pascal Ruffieux
- Empa, Swiss Federal Laboratories for Material Science and Technology, 8600 Dübendorf, Switzerland
| | - Hiroko Yamada
- Graduate
School of Materials Science, Nara Institute of Science and Technology (NAIST), 8916-5 Takayama-cho, Ikoma 630-0192, Japan
| | - Roman Fasel
- Empa, Swiss Federal Laboratories for Material Science and Technology, 8600 Dübendorf, Switzerland
- Department
of Chemistry and Biochemistry, University of Bern, Freiestrasse
3, 3012 Bern, Switzerland
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20
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Filip-Granit N, Goldberg E, Samish I, Ashur I, van der Boom ME, Cohen H, Scherz A. Submolecular Gates Self-Assemble for Hot-Electron Transfer in Proteins. J Phys Chem B 2017; 121:6981-6988. [PMID: 28498662 DOI: 10.1021/acs.jpcb.7b00432] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Redox reactions play key roles in fundamental biological processes. The related spatial organization of donors and acceptors is assumed to undergo evolutionary optimization facilitating charge mobilization within the relevant biological context. Experimental information from submolecular functional sites is needed to understand the organization strategies and driving forces involved in the self-development of structure-function relationships. Here we exploit chemically resolved electrical measurements (CREM) to probe the atom-specific electrostatic potentials (ESPs) in artificial arrays of bacteriochlorophyll (BChl) derivatives that provide model systems for photoexcited (hot) electron donation and withdrawal. On the basis of computations we show that native BChl's in the photosynthetic reaction center (RC) self-assemble at their ground-state as aligned gates for functional charge transfer. The combined computational and experimental results further reveal how site-specific polarizability perpendicular to the molecular plane enhances the hot-electron transport. Maximal transport efficiency is predicted for a specific, ∼5 Å, distance above the center of the metalized BChl, which is in remarkably close agreement with the distance and mutual orientation of corresponding native cofactors. These findings provide new metrics and guidelines for analysis of biological redox centers and for designing charge mobilizing machines such as artificial photosynthesis.
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Affiliation(s)
- Neta Filip-Granit
- Department of Plant and Environmental Sciences, ‡Department of Organic Chemistry, and §Department of Chemical Research Support, Weizmann Institute of Science , Rehovot, 7610001, Israel
| | - Eran Goldberg
- Department of Plant and Environmental Sciences, ‡Department of Organic Chemistry, and §Department of Chemical Research Support, Weizmann Institute of Science , Rehovot, 7610001, Israel
| | - Ilan Samish
- Department of Plant and Environmental Sciences, ‡Department of Organic Chemistry, and §Department of Chemical Research Support, Weizmann Institute of Science , Rehovot, 7610001, Israel
| | - Idan Ashur
- Department of Plant and Environmental Sciences, ‡Department of Organic Chemistry, and §Department of Chemical Research Support, Weizmann Institute of Science , Rehovot, 7610001, Israel
| | - Milko E van der Boom
- Department of Plant and Environmental Sciences, ‡Department of Organic Chemistry, and §Department of Chemical Research Support, Weizmann Institute of Science , Rehovot, 7610001, Israel
| | - Hagai Cohen
- Department of Plant and Environmental Sciences, ‡Department of Organic Chemistry, and §Department of Chemical Research Support, Weizmann Institute of Science , Rehovot, 7610001, Israel
| | - Avigdor Scherz
- Department of Plant and Environmental Sciences, ‡Department of Organic Chemistry, and §Department of Chemical Research Support, Weizmann Institute of Science , Rehovot, 7610001, Israel
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21
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Quinn T, Choudhury P. Direct oxidation of methane to methanol on single-site copper-oxo species of copper porphyrin functionalized graphene: A DFT study. MOLECULAR CATALYSIS 2017. [DOI: 10.1016/j.mcat.2017.01.018] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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22
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Zhang Q, Liu L, Tao S, Wang C, Zhao C, González C, Dappe YJ, Nichols RJ, Yang L. Graphene as a Promising Electrode for Low-Current Attenuation in Nonsymmetric Molecular Junctions. NANO LETTERS 2016; 16:6534-6540. [PMID: 27668518 DOI: 10.1021/acs.nanolett.6b03180] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
We have measured the single-molecule conductance of 1,n-alkanedithiol molecular bridges (n = 4, 6, 8, 10, 12) on a graphene substrate using scanning tunneling microscopy (STM)-formed electrical junctions. The conductance values of this homologous series ranged from 2.3 nS (n = 12) to 53 nS (n = 4), with a decay constant βn of 0.40 per methylene (-CH2) group. This result is explained by a combination of density functional theory (DFT) and Keldysh-Green function calculations. The obtained decay, which is much lower than the one obtained for symmetric gold junctions, is related to the weak coupling at the molecule-graphene interface and the electronic structure of graphene. As a consequence, we show that using graphene nonsymmetric junctions and appropriate anchoring groups may lead to a much-lower decay constant and more-conductive molecular junctions at longer lengths.
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Affiliation(s)
- Qian Zhang
- Department of Chemistry, University of Liverpool , Liverpool, L69 7ZD U.K
| | - Longlong Liu
- Department of Chemistry and Chemical Engineering, Chongqing University , Chongqing, 400030, China
| | - Shuhui Tao
- Department of Chemistry, University of Liverpool , Liverpool, L69 7ZD U.K
| | | | | | - César González
- SPEC, CEA, CNRS, Université Paris-Saclay , CEA Saclay 91191 Gif-sur-Yvette Cedex, France
- Departamento de Electrónica y Tecnología de Computadores, Universidad de Granada , Campus de Fuente Nueva & CITIC, Campus de Aynadamar 18071, Granada, Spain
| | - Yannick J Dappe
- SPEC, CEA, CNRS, Université Paris-Saclay , CEA Saclay 91191 Gif-sur-Yvette Cedex, France
| | - Richard J Nichols
- Department of Chemistry, University of Liverpool , Liverpool, L69 7ZD U.K
| | - Li Yang
- Department of Chemistry, University of Liverpool , Liverpool, L69 7ZD U.K
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23
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Aranda D, López-Tocón I, Soto J, Otero JC, Avila F. An approach to the electronic structure of molecular junctions with metal clusters of atomic thickness. Phys Chem Chem Phys 2016; 18:27179-27184. [PMID: 27722529 DOI: 10.1039/c6cp05403j] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
TD-DFT calculations predict a linear dependence of the energies of charge transfer states of Agn-pyrazine-Agn molecular junctions on the inverse of the size (1/n) of the linear metal chains. The density of charge (qeff = q/n) in the metal-to-metal charge transfer excited states (CTMM: Agnq-pyrazine-Agn-q) smoothly tunes the electronic structure of the junction, especially the metal-to-molecule charge transfer states (CT0 and CT1) and the first excited singlet of pyrazine (S1,Pz). In enlarged junctions, pyrazine bonds preferably to one of the Agn clusters and this weak adsorption produces a significant unexpected asymmetry for forward and reverse charge transfer processes.
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Affiliation(s)
- Daniel Aranda
- Universidad de Málaga, Andalucía Tech, Facultad de Ciencias, Departamento de Química Física, Unidad Asociada CSIC, 29071-Málaga, Spain.
| | - Isabel López-Tocón
- Universidad de Málaga, Andalucía Tech, Facultad de Ciencias, Departamento de Química Física, Unidad Asociada CSIC, 29071-Málaga, Spain.
| | - Juan Soto
- Universidad de Málaga, Andalucía Tech, Facultad de Ciencias, Departamento de Química Física, Unidad Asociada CSIC, 29071-Málaga, Spain.
| | - Juan C Otero
- Universidad de Málaga, Andalucía Tech, Facultad de Ciencias, Departamento de Química Física, Unidad Asociada CSIC, 29071-Málaga, Spain.
| | - Francisco Avila
- Universidad de Málaga, Andalucía Tech, Facultad de Ciencias, Departamento de Química Física, Unidad Asociada CSIC, 29071-Málaga, Spain.
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24
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Guo Y, Ding Z, Sun L, Li J, Meng S, Lu X. Inducing Transient Charge State of a Single Water Cluster on Cu(111) Surface. ACS NANO 2016; 10:4489-4495. [PMID: 27007702 DOI: 10.1021/acsnano.6b00230] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The hydrated electron on solid surface is a crucial species to interfacial chemistry. We present a joint low-temperature scanning tunneling microscopy and density functional theory investigation to explore the existence of a transient hydrated electron state induced by injecting tunneling electrons into a single water nonamer cluster on Cu(111) surface. The directional diffusion of water cluster under the Coulomb repulsive potential has been observed as evidence for the emergence of the transient hydrated electron. A critical structure transformation in water cluster for the emergence of hydrated electron has been identified. A charging mechanism has been proposed based on density functional theory calculation and scanning tunneling microscope results.
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Affiliation(s)
- Yang Guo
- Beijing National Laboratory for Condensed-Matter Physics and Institute of Physics, Chinese Academy of Sciences , Beijing 100190, People's Republic of China
| | - Zijing Ding
- Beijing National Laboratory for Condensed-Matter Physics and Institute of Physics, Chinese Academy of Sciences , Beijing 100190, People's Republic of China
| | - Lihuan Sun
- Beijing National Laboratory for Condensed-Matter Physics and Institute of Physics, Chinese Academy of Sciences , Beijing 100190, People's Republic of China
| | - Jianmei Li
- Beijing National Laboratory for Condensed-Matter Physics and Institute of Physics, Chinese Academy of Sciences , Beijing 100190, People's Republic of China
| | - Sheng Meng
- Beijing National Laboratory for Condensed-Matter Physics and Institute of Physics, Chinese Academy of Sciences , Beijing 100190, People's Republic of China
- Collaborative Innovation Center of Quantum Matter , Beijing 100190, People's Republic of China
| | - Xinghua Lu
- Beijing National Laboratory for Condensed-Matter Physics and Institute of Physics, Chinese Academy of Sciences , Beijing 100190, People's Republic of China
- Collaborative Innovation Center of Quantum Matter , Beijing 100190, People's Republic of China
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25
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Liu R, Wang CK, Li ZL. A method to study electronic transport properties of molecular junction: one-dimension transmission combined with three-dimension correction approximation (OTCTCA). Sci Rep 2016; 6:21946. [PMID: 26911451 PMCID: PMC4766509 DOI: 10.1038/srep21946] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2015] [Accepted: 02/03/2016] [Indexed: 11/09/2022] Open
Abstract
Based on the ab initio calculation, a method of one-dimension transmission combined with three-dimension correction approximation (OTCTCA) is developed to investigate electron-transport properties of molecular junctions. The method considers that the functional molecule provides a spatial distribution of effective potential field for the electronic transport. The electrons are injected from one electrode by bias voltage, then transmit through the potential field around the functional molecule, at last are poured into the other electrode with a specific transmission probability which is calculated from one-dimension Schrödinger equation combined with three-dimension correction. The electron-transport properties of alkane diamines and 4, 4′-bipyridine molecular junctions are studied by applying OTCTCA method. The numerical results show that the conductance obviously exponentially decays with the increase of molecular length. When stretching molecular junctions, steps with a certain width are presented in conductance traces. Especially, in stretching process of 4, 4′-bipyridine molecular junction, if the terminal N atom is broken from flat part of electrode tip and exactly there is a surface Au atom on the tip nearby the N atom, the molecule generally turns to absorb on the surface Au atom, which further results in another lower conductance step in the traces as the experimental probing.
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Affiliation(s)
- Ran Liu
- School of Physics and Electronics, Shandong Normal University, Jinan, 250014, China
| | - Chuan-Kui Wang
- School of Physics and Electronics, Shandong Normal University, Jinan, 250014, China
| | - Zong-Liang Li
- School of Physics and Electronics, Shandong Normal University, Jinan, 250014, China
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26
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Tebi S, Aldahhak H, Serrano G, Schöfberger W, Rauls E, Schmidt WG, Koch R, Müllegger S. Manipulation resolves non-trivial structure of corrole monolayer on Ag(111). NANOTECHNOLOGY 2016; 27:025704. [PMID: 26629708 DOI: 10.1088/0957-4484/27/2/025704] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Non-trivial arrangement of molecules within a molecular network complicates structure determination due to interdigitation, partial overlap, or stacking. We demonstrate that combined imaging and lateral manipulation with a scanning tunneling microscope resolves the intricate structure of a molecular network in two-dimensions in a straightforward manner. The network, formed by a monolayer of 5,10,15-tris(pentafluorophenyl)-corrole molecules on Ag(111), is manipulated for the first time with single-molecule precision. Our results reveal a shingle-like packing of partially overlapping corrole molecules. Density functional theory calculations support our findings.
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Affiliation(s)
- Stefano Tebi
- Institute of Semiconductor and Solid State Physics, Johannes Kepler University, A-4040 Linz, Austria
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27
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Bryant GW. Approaching the quantum limit for plasmonics: linear atomic chains. JOURNAL OF OPTICS (2010) 2016; 18:10.1088/2040-8978/18/7/074001. [PMID: 32117560 PMCID: PMC7047738 DOI: 10.1088/2040-8978/18/7/074001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Optical excitations in atomic-scale materials can be strongly mixed, with contributions from both single-particle transitions and collective response. This complicates the quantum description of these excitations, because there is no clear way to define their quantization. To develop a quantum theory for these optical excitations, they must first be characterized so that single-particle-like and collective excitations can be identified. Linear atomic chains, such as atom chains on surfaces, linear arrays of dopant atoms in semiconductors, or linear molecules, provide ideal testbeds for studying collective excitations in small atomic-scale systems. We use exact diagonalization to study the many-body excitations of finite (10 to 25) linear atomic chains described by a simplified model Hamiltonian. Exact diagonalization results can be very different from the density functional theory (DFT) results usually obtained. Highly correlated, multiexcitonic states, strongly dependent on the electron-electron interaction strength, dominate the exact spectral and optical response but are not present in DFT excitation spectra. The ubiquitous presence of excitonic many-body states in the spectra makes it hard to identify plasmonic excitations. A combination of criteria involving a many-body state's transfer dipole moment, balance, transfer charge, dynamical response, and induced-charge distribution do strongly suggest which many-body states should be considered as plasmonic. This analysis can be used to reveal the few plasmonic many-body states hidden in the dense spectrum of low-energy single-particle-like states and many higher-energy excitonic-like states. These excitonic states are the predominant excitation because of the many possible ways to develop local correlations.
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Affiliation(s)
- Garnett W Bryant
- Quantum Measurement Division and Joint Quantum Institute, National Institute of Standards and Technology, Gaithersburg, MD, 20899-8423, USA; University of Maryland, College Park, MD 20742, USA
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28
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Yang HH, Tsai HH, Ying CF, Yang TH, Kaun CC, Chen CH, Lin MT. Tuning molecule-substrate coupling via deposition of metal adatoms. J Chem Phys 2015; 143:184704. [DOI: 10.1063/1.4935714] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Affiliation(s)
- Hung-Hsiang Yang
- Department of Physics, National Taiwan University, Taipei 10617, Taiwan
| | - Hsu-Han Tsai
- Department of Chemistry, National Taiwan University, Taipei 10617, Taiwan
| | - Chi-Feng Ying
- Department of Chemistry, National Taiwan University, Taipei 10617, Taiwan
| | - Tsung-Han Yang
- Research Center for Applied Sciences, Academia Sinica, Taipei 11529, Taiwan
| | - Chao-Cheng Kaun
- Research Center for Applied Sciences, Academia Sinica, Taipei 11529, Taiwan
| | - Chun-hsien Chen
- Department of Chemistry, National Taiwan University, Taipei 10617, Taiwan
- Center for Emerging Material and Advanced Device, National Taiwan University, Taipei 10617, Taiwan
| | - Minn-Tsong Lin
- Department of Physics, National Taiwan University, Taipei 10617, Taiwan
- Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei 10617, Taiwan
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29
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Sotthewes K, Heimbuch R, Zandvliet HJW. Dynamics of copper-phthalocyanine molecules on Au/Ge(001). J Chem Phys 2015; 143:134303. [PMID: 26450310 DOI: 10.1063/1.4932190] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Abstract
Spatially resolved current-time scanning tunneling spectroscopy combined with current-distance spectroscopy has been used to characterize the dynamic behavior of copper-phthalocyanine (CuPc) molecules adsorbed on a Au-modified Ge(001) surface. The analyzed CuPc molecules are adsorbed in a "molecular bridge" configuration, where two benzopyrrole groups (lobes) are connected to a Au-induced nanowire, whereas the other two lobes are connected to the adjacent nanowire. Three types of lobe configurations are found: a bright lobe, a dim lobe, and a fuzzy lobe. The dim and fuzzy lobes exhibit a well-defined switching behavior between two discrete levels, while the bright lobe shows a broad oscillation band. The observed dynamic behavior is induced by electrons that are injected into the LUMO+1 orbital of the CuPc molecule. By precisely adjusting the tip-molecule distance, the switching frequency of the lobes can be tuned accurately.
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Affiliation(s)
- K Sotthewes
- Physics of Interfaces and Nanomaterials, MESA Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500AE Enschede, The Netherlands
| | - R Heimbuch
- Physics of Interfaces and Nanomaterials, MESA Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500AE Enschede, The Netherlands
| | - H J W Zandvliet
- Physics of Interfaces and Nanomaterials, MESA Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500AE Enschede, The Netherlands
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30
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Goswami HP, Hua W, Zhang Y, Mukamel S, Harbola U. Electroluminescence in Molecular Junctions: A Diagrammatic Approach. J Chem Theory Comput 2015; 11:4304-15. [DOI: 10.1021/acs.jctc.5b00500] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Himangshu Prabal Goswami
- Department
of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore 560012, India
| | - Weijie Hua
- Department
of Chemistry, University of California, Irvine, California 92697-2025, United States
| | - Yu Zhang
- Department
of Chemistry, University of California, Irvine, California 92697-2025, United States
| | - Shaul Mukamel
- Department
of Chemistry, University of California, Irvine, California 92697-2025, United States
| | - Upendra Harbola
- Department
of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore 560012, India
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31
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Li J, Li B, Wang Y, Zhao A, Wang B. Identifying site-dependent effects of an extra Co atom on electronic states of single Co-phthalocyanine molecule. J Chem Phys 2015. [DOI: 10.1063/1.4926832] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Affiliation(s)
- Jingcheng Li
- Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Bin Li
- Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui 230026, China
- Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Yu Wang
- Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Aidi Zhao
- Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui 230026, China
- Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Bing Wang
- Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui 230026, China
- Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
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32
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Affiliation(s)
- Robert M. Metzger
- Laboratory for Molecular
Electronics, Department of Chemistry, The University of Alabama, Box 870336, Tuscaloosa, Alabama 35487-0336, United States
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33
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Henzl J, Boom K, Morgenstern K. Influence of water on supra-molecular assembly of 4, 4'-dihydroxy azobenzene on Ag(111). J Chem Phys 2015; 142:101920. [PMID: 25770509 DOI: 10.1063/1.4907368] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We explore co-deposition of water and 4, 4'-dihydroxy azobenzene on Ag(111) by low-temperature scanning tunneling microscopy at different water-to-azobenzene ratios. At all ratios, the water interacts with the hydroxyl end groups of the molecule replacing the direct hydrogen bonding. The change in bonding reduces the azobenzene density as compared to the one in the closed-packed waterless azobenzene structure. At intermediate water-to-azobenzene ratios, pores are formed in the azobenzene layer at nanometer distance from the water. At high water-to-azobenzene ratios, a water superstructure with a 1.4 nm × 1.4 nm unit cell develops. Our results point to a method to vary the density of an organic layer by tuning the amount of an inorganic additive.
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Affiliation(s)
- Jörg Henzl
- Leibniz Universität Hannover, Institut für Festkörperphysik, Abteilung für atomare und molekulare Strukturen (ATMOS), Appelstr. 2, D-30167 Hannover, Germany
| | - Konrad Boom
- Leibniz Universität Hannover, Institut für Festkörperphysik, Abteilung für atomare und molekulare Strukturen (ATMOS), Appelstr. 2, D-30167 Hannover, Germany
| | - Karina Morgenstern
- Ruhr-Universität Bochum, Lehrstuhl für physikalische Chemie I, D-44780 Bochum, Germany
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34
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Yang Z, Corso M, Robles R, Lotze C, Fitzner R, Mena-Osteritz E, Bäuerle P, Franke KJ, Pascual JI. Orbital redistribution in molecular nanostructures mediated by metal-organic bonds. ACS NANO 2014; 8:10715-10722. [PMID: 25244124 DOI: 10.1021/nn504431e] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Dicyanovinyl-quinquethiophene (DCV5T-Me2) is a prototype conjugated oligomer for highly efficient organic solar cells. This class of oligothiophenes are built up by an electron-rich donor (D) backbone and terminal electron-deficient acceptor (A) moieties. Here, we investigated its structural and electronic properties when it is adsorbed on a Au(111) surface using low temperature scanning tunneling microscopy/spectroscopy (STM/STS) and atomic force microscopy (AFM). We find that DCV5T-Me2 self-assembles in extended chains, stabilized by intercalated Au atoms. The effect of metal-ligand hybridization with Au adatoms causes an energetic downshift of the DCV5T-Me2 lowest unoccupied molecular orbital (LUMO) with respect to the uncoordinated molecules on the surface. The asymmetric coordination of a gold atom to only one molecular end group leads to an asymmetric localization of the LUMO and LUMO+1 states at opposite sides. Using model density functional theory (DFT) calculations, we explain such orbital reshaping as a consequence of linear combinations of the original LUMO and LUMO+1 orbitals, mixed by the attachment of a bridging Au adatom. Our study shows that the alignment of molecular orbitals and their distribution within individual molecules can be modified by contacting them to metal atoms in specific sites.
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Affiliation(s)
- Zechao Yang
- Institut für Experimentalphysik, Freie Universität Berlin , Arnimallee 14, 14195 Berlin, Germany
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35
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Guo H, Wang Y, Du S, Gao HJ. High-resolution scanning tunneling microscopy imaging of Si(1 1 1)-7 × 7 structure and intrinsic molecular states. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2014; 26:394001. [PMID: 25214483 DOI: 10.1088/0953-8984/26/39/394001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
We review our achievements in exploring the high resolution imaging of scanning tunneling microscopy (STM) on the surface and adsorbates in a ultra-high vacuum system, by modifying the STM tip or introducing a decoupled layer onto the substrate. With an ultra-sharp tip, the highest resolution of Si(1 1 1)-7 × 7 reconstruction can be achieved, in which all the rest atoms and adatoms are observed simultaneously with high contrast. Further functionalization of STM tips can realize selective imaging of inherent molecular states. The electronic states of perylene and metal-phthalocyanine molecules are resolved with special decorated tips on metal substrates at low temperature. Moreover, we present two kinds of buffer layer: an organic molecular layer and epitaxially grown graphene to decouple the molecular electronic structure from the influence of the underlying metallic substrate and allow the direct imaging of the intrinsic orbitals of the adsorbed molecules. Theoretical calculations and STM simulations, based on first-principle density function theory, are performed in order to understand and verify the mechanism of high-resolution images. We propose that our results provide impactful routes to pursue the goal of higher resolution, more detailed information and extensive properties for future STM applications.
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Affiliation(s)
- Haiming Guo
- Institute of Physics, Chinese Academy of Sciences, PO Box 603, Beijing 100190, People's Republic of China
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36
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Sun Q, Xu W. Regulating the Interactions of Adsorbates on Surfaces by Scanning Tunneling Microscopy Manipulation. Chemphyschem 2014; 15:2657-63. [DOI: 10.1002/cphc.201402021] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2014] [Indexed: 11/05/2022]
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37
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Komeda T, Isshiki H, Liu J, Katoh K, Yamashita M. Variation of Kondo temperature induced by molecule-substrate decoupling in film formation of bis(phthalocyaninato)terbium(III) molecules on Au(111). ACS NANO 2014; 8:4866-75. [PMID: 24773244 DOI: 10.1021/nn500809v] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
We demonstrate that the lattice formation of an adsorbed molecule decouples the molecule-substrate interaction to change the Kondo resonance, which occurs due to interactions between conduction electrons and the molecule's unpaired spin. The double-decker bis(phthalocyaninato)terbium(III) complex, which is single-molecule magnet and forms a Kondo resonance on a Au(111) surface through an unpaired π-radical spin, is studied using scanning tunneling microscopy/spectroscopy (STM/STS). In the STS spectra, an unusual sharp, strong peak (peak A) is found only for the molecule in a film. The peak position of peak A (εA) cyclically shifts by several hundred millivolts as the STS tip position shifts along the outer circle of the molecule, reflecting the tilting of the upper phthalocyanine (Pc) ligand from the flat-lying lower Pc ligand. The Kondo resonance, which is detected as a sharp peak at the Fermi level, also shows cyclic variations of the peak width and intensity. As εA approaches EF, the Kondo temperature (TK) increases. We propose a model that peak A originates from the singly occupied molecular orbital state whose energy is shifted by an unscreened final state effect due to a decrease in the molecule-substrate chemisorptive interaction. We further examine this model using density functional theory calculations, confirming a decreased molecule-substrate interaction for molecules in the film compared to that of isolated molecules. Further calculations of a tilted upper Pc ligand configuration show a site-dependent, cyclic variation of the molecule-substrate interaction within a molecule.
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Affiliation(s)
- Tadahiro Komeda
- Institute of Multidisciplinary Research for Advanced Materials (IMRAM, Tagen), Tohoku University , 2-1-1, Katahira, Aoba-Ku, Sendai 980-0877, Japan
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38
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Zhang H, Franke JH, Zhong D, Li Y, Timmer A, Arado OD, Mönig H, Wang H, Chi L, Wang Z, Müllen K, Fuchs H. Surface supported gold-organic hybrids: on-surface synthesis and surface directed orientation. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2014; 10:1361-1368. [PMID: 24227765 DOI: 10.1002/smll.201303011] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2013] [Indexed: 06/02/2023]
Abstract
The surface-assisted synthesis of gold-organic hybrids on Au (111) and Au (100) surfaces is repotred by thermally initiated dehalogenation of chloro-substituted perylene-3,4,9,10-tetracarboxylic acid bisimides (PBIs). Structures and surface-directed alignment of the Au-PBI chains are investigated by scanning tunnelling microscopy in ultra high vacuum conditions. Using dichloro-PBI as a model system, the mechanism for the formation of Au-PBI dimer is revealed with scanning tunnelling microscopy studies and density functional theory calculations. A PBI radical generated from the homolytic C-Cl bond dissociation can covalently bind a surface gold atom and partially pull it out of the surface to form stable PBI-Au hybrid species, which also gives rise to the surface-directed alignment of the Au-PBI chains on reconstructed Au (100) surfaces.
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Affiliation(s)
- Haiming Zhang
- Physikalisches Institut, Universität Münster, Wilhelm-Klemmstrasse 10, 48149 Münster, Germany, Center for Nanotechnology (CeNTech), Heisenbergstrasse 11, 48149, Münster, Germany
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39
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Ditze S, Stark M, Buchner F, Aichert A, Jux N, Luckas N, Görling A, Hieringer W, Hornegger J, Steinrück HP, Marbach H. On the energetics of conformational switching of molecules at and close to room temperature. J Am Chem Soc 2014; 136:1609-16. [PMID: 24410182 DOI: 10.1021/ja411884p] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We observe and induce conformational switching of individual molecules via scanning tunneling microscopy (STM) at and close to room temperature. 2H-5,10,15,20-Tetrakis-(3,5-di-tert-butyl)-phenylporphyrin adsorbed on Cu(111) forms a peculiar supramolecular ordered phase in which the molecules arrange in alternating rows, with two distinct appearances in STM which are assigned to concave and convex intramolecular conformations. Around room temperature, frequent bidirectional conformational switching of individual molecules from concave to convex and vice versa is observed. From the temperature dependence, detailed insights into the energy barriers and entropic contributions of the switching processes are deduced. At 200 K, controlled STM tip-induced unidirectional switching is possible, yielding an information storage density of 4.9 × 10(13) bit/inch(2). With this contribution we demonstrate that controlled switching of individual molecules at comparably high temperatures is possible and that entropic effects can be a decisive factor in potential molecular devices at these temperatures.
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Affiliation(s)
- Stefanie Ditze
- Lehrstuhl für Physikalische Chemie II and ‡Lehrstuhl für Theoretische Chemie, Universität Erlangen-Nürnberg , Egerlandstr. 3, 91058 Erlangen, Germany
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40
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Marbach H, Steinrück HP. Studying the dynamic behaviour of porphyrins as prototype functional molecules by scanning tunnelling microscopy close to room temperature. Chem Commun (Camb) 2014; 50:9034-48. [DOI: 10.1039/c4cc01744g] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Scanning tunnelling microscopy of the dynamics of functional molecules (porphyrins) close to room temperature enables a detailed determination of the thermodynamic potentials including entropic contributions of the underlying processes.
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Affiliation(s)
- H. Marbach
- Lehrstuhl für Physikalische Chemie II
- Egerlandstrasse 3 and Interdisciplinary Center for Molecular Materials (ICMM)
- Friedrich-Alexander-Universität Erlangen-Nürnberg
- D-91058 Erlangen, Germany
| | - H.-P. Steinrück
- Lehrstuhl für Physikalische Chemie II
- Egerlandstrasse 3 and Interdisciplinary Center for Molecular Materials (ICMM)
- Friedrich-Alexander-Universität Erlangen-Nürnberg
- D-91058 Erlangen, Germany
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41
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Bazarnik M, Brede J, Decker R, Wiesendanger R. Tailoring molecular self-assembly of magnetic phthalocyanine molecules on Fe- and Co-intercalated graphene. ACS NANO 2013; 7:11341-11349. [PMID: 24279797 DOI: 10.1021/nn405172q] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
We investigate molecule-molecule, as well as molecule-substrate, interactions of phthalocyanine molecules deposited on graphene. In particular, we show how to tune the self-assembly of molecular lattices in two dimensions by intercalation of transition metals between graphene and Ir(111): modifying the surface potential of the graphene layer via intercalation leads to the formation of square, honeycomb, or Kagome lattices. Finally, we demonstrate that such surface induced molecular lattices are stable even at room temperature.
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Affiliation(s)
- Maciej Bazarnik
- Institute of Applied Physics, University of Hamburg , Jungiusstrasse 11, D-20355 Hamburg, Germany
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42
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Hayakawa R, Higashiguchi K, Matsuda K, Chikyow T, Wakayama Y. Photoisomerization-induced manipulation of single-electron tunneling for novel Si-based optical memory. ACS APPLIED MATERIALS & INTERFACES 2013; 5:11371-11376. [PMID: 24099440 DOI: 10.1021/am403616m] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
We demonstrated optical manipulation of single-electron tunneling (SET) by photoisomerization of diarylethene molecules in a metal-insulator-semiconductor (MIS) structure. Stress is placed on the fact that device operation is realized in the practical device configuration of MIS structure and that it is not achieved in structures based on nanogap electrodes and scanning probe techniques. Namely, this is a basic memory device configuration that has the potential for large-scale integration. In our device, the threshold voltage of SET was clearly modulated as a reversible change in the molecular orbital induced by photoisomerization, indicating that diarylethene molecules worked as optically controllable quantum dots. These findings will allow the integration of photonic functionality into current Si-based memory devices, which is a unique feature of organic molecules that is unobtainable with inorganic materials. Our proposed device therefore has enormous potential for providing a breakthrough in Si technology.
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Affiliation(s)
- Ryoma Hayakawa
- International Center for Materials Nanoarchitechtonics (WPI-MANA), National Institute for Materials Science , 1-1 Namiki, Tsukuba 305-0044, Japan
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43
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Huang JS, Wong KM, Chan SLF, Tso KCH, Jiang T, Che CM. Ketimido Metallophthalocyanines: An Approach to Phthalocyanine-Supported Mononuclear High-Valent Ruthenium Complexes. Chem Asian J 2013; 9:338-50. [DOI: 10.1002/asia.201301109] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2013] [Revised: 09/16/2013] [Indexed: 11/05/2022]
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44
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Yang HH, Chu YH, Lu CI, Yang TH, Yang KJ, Kaun CC, Hoffmann G, Lin MT. Digitized charge transfer magnitude determined by metal-organic coordination number. ACS NANO 2013; 7:2814-9. [PMID: 23451803 DOI: 10.1021/nn4003715] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Well-ordered metal-organic nanostructures of Fe-PTCDA (perylene-3,4,9,10-tetracarboxylic-3,4,9,10-dianhydride) chains and networks are grown on a Au(111) surface. These structures are investigated by high-resolution scanning tunneling microscopy. Digitized frontier orbital shifts are followed in scanning tunneling spectroscopy. By comparing the frontier energies with the molecular coordination environments, we conclude that the specific coordination affects the magnitude of charge transfer onto each PTCDA in the Fe-PTCDA hybridization system. A basic model is derived, which captures the essential underlying physics and correlates the observed energetic shift of the frontier orbital with the charge transfer.
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Affiliation(s)
- Hung-Hsiang Yang
- Department of Physics, National Taiwan University, Taipei, Taiwan
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45
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Ditze S, Röckert M, Buchner F, Zillner E, Stark M, Steinrück HP, Marbach H. Towards the engineering of molecular nanostructures: local anchoring and functionalization of porphyrins on model-templates. NANOTECHNOLOGY 2013; 24:115305. [PMID: 23448712 DOI: 10.1088/0957-4484/24/11/115305] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
We demonstrate that Cu(111) surfaces pre-covered with a submonolayer of copper oxide or metallic nickel are suitable model-templates for the selective adsorption and/or localized functionalization of functional molecules such as different free base porphyrins and metalloporphyrins. The oxide/Cu(111) model-template is able to steer the adsorption of tetraphenylporphyrins (TPP): 2HTPP selectively adsorbs on the bare Cu areas, and for CoTPP anchoring at the rim of the copper oxide islands is found. On the Ni/Cu(111) model-template TPP molecules are pinned on the Ni areas while they are mobile on the bare Cu surface. Interestingly, adsorption of free base octaethylporphyrin on Ni/Cu(111) leads to a local functionalization, namely the metalation to NiOEP on the Ni areas. Model-template preparation and characterization by scanning tunneling microscopy is performed at room temperature.
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Affiliation(s)
- Stefanie Ditze
- Lehrstuhl für Physikalische Chemie II and Interdisciplinary Center for Molecular Materials (ICMM), Universität Erlangen-Nürnberg, Erlangen, Germany
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46
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Kuzmin M, Kumar A, Poelsema B, Zandvliet HJW. Decoupling of the copper core in a single copperphthalocyanine molecule. J Chem Phys 2013; 138:114302. [DOI: 10.1063/1.4795101] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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47
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Wang W, Shi X, Wang S, Liu J, Van Hove MA, Liu PN, Zhang RQ, Lin N. Cooperative modulation of electronic structures of aromatic molecules coupled to multiple metal contacts. PHYSICAL REVIEW LETTERS 2013; 110:046802. [PMID: 25166187 DOI: 10.1103/physrevlett.110.046802] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/14/2012] [Indexed: 06/03/2023]
Abstract
We use cryogenic scanning tunneling microscopy and spectroscopy and density-functional theory calculations to inspect the modulation of electronic states of aromatic molecules. The molecules are self-assembled on a Cu(111) surface forming molecular networks in which the molecules are in different contact configurations, including laterally coupled to different numbers of coordination bonds and vertically adsorbed at different heights above the substrate. We quantitatively analyze the molecular states and find that a delocalized empty molecular state is modulated by these multiple contacts in a cooperative manner: its energy is down shifted by ∼ 0.16 eV for each additional lateral contact and by ∼ 0.1 eV as the vertical molecule-surface distance is reduced by 0.1 Å in the physisorption regime. We also report that in a molecule-metal-molecule system the bridging metal can mediate the electronic states of the two molecules.
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Affiliation(s)
- Weihua Wang
- Department of Physics, The Hong Kong University of Science and Technology, Hong Kong, China
| | - Xingqiang Shi
- Institute of Computational and Theoretical Studies and Department of Physics, Hong Kong Baptist University, Hong Kong, China
| | - Shiyong Wang
- Department of Physics, The Hong Kong University of Science and Technology, Hong Kong, China
| | - Jun Liu
- Shanghai Key Laboratory of Functional Materials Chemistry and Institute of Fine Chemicals, East China University of Science and Technology, Meilong Road 130, Shanghai 200237, China
| | - Michel A Van Hove
- Institute of Computational and Theoretical Studies and Department of Physics, Hong Kong Baptist University, Hong Kong, China
| | - Pei Nian Liu
- Shanghai Key Laboratory of Functional Materials Chemistry and Institute of Fine Chemicals, East China University of Science and Technology, Meilong Road 130, Shanghai 200237, China
| | - Rui-Qin Zhang
- Department of Physics and Materials Science, City University of Hong Kong, Hong Kong, China
| | - Nian Lin
- Department of Physics, The Hong Kong University of Science and Technology, Hong Kong, China
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48
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Zhao A, Tan S, Li B, Wang B, Yang J, Hou JG. STM tip-assisted single molecule chemistry. Phys Chem Chem Phys 2013; 15:12428-41. [PMID: 23788046 DOI: 10.1039/c3cp51446c] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Affiliation(s)
- Aidi Zhao
- Hefei National Laboratory for Physical Sciences at the Microscale (HFNL), University of Science and Technology of China (USTC), Hefei, Anhui 230026, P R China
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49
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Wang YF, Néel N, Kröger J, Vázquez H, Brandbyge M, Wang B, Berndt R. Voltage-dependent conductance states of a single-molecule junction. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2012; 24:394012. [PMID: 22964461 DOI: 10.1088/0953-8984/24/39/394012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Ag-Sn-phthalocyanine-Ag junctions are shown to exhibit three conductance states. While the junctions are conductive at low bias, their impedance drastically increases above a critical bias. Two-level fluctuations occur at intermediate bias. These characteristics may be used to protect a nanoscale circuit. Further experiments along with calculations reveal that the self-limiting conductance of the junctions is due to reversible changes of the junction geometry.
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Affiliation(s)
- Y F Wang
- Institut für Experimentelle und Angewandte Physik, Christian-Albrechts-Universität, D-24098 Kiel, Germany.
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50
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Kanehara M, Takeya J, Uemura T, Murata H, Takimiya K, Sekine H, Teranishi T. Electroconductive π-Junction Au Nanoparticles. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2012. [DOI: 10.1246/bcsj.20120103] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
| | - Jun Takeya
- Department of Chemistry, Graduate School of Science, Osaka University
| | - Takafumi Uemura
- Department of Chemistry, Graduate School of Science, Osaka University
| | - Hideyuki Murata
- School of Materials Science, Japan Advanced Institute of Science and Technology (JAIST)
| | - Kazuo Takimiya
- Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University
| | - Hikaru Sekine
- Department of Chemistry, Graduate School of Pure and Applied Sciences, University of Tsukuba
- CREST, Japan Science and Technology Agency
| | - Toshiharu Teranishi
- Department of Chemistry, Graduate School of Pure and Applied Sciences, University of Tsukuba
- CREST, Japan Science and Technology Agency
- Institute for Chemical Research, Kyoto University
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