Artykuły w czasopismach na temat „Molecular conduction”

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1

Mori, Takehiko. "Electric Conduction in Molecular Materials". Molecular Science 2, nr 1 (2008): A0024. http://dx.doi.org/10.3175/molsci.2.a0024.

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2

Landau, Arie, Leeor Kronik i Abraham Nitzan. "Cooperative Effects in Molecular Conduction". Journal of Computational and Theoretical Nanoscience 5, nr 4 (1.04.2008): 535–44. http://dx.doi.org/10.1166/jctn.2008.2496.

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3

Del Re, Julia, Martin H. Moore, Banahalli R. Ratna i Amy Szuchmacher Blum. "Molecular sensing: modulating molecular conduction through intermolecular interactions". Physical Chemistry Chemical Physics 15, nr 21 (2013): 8318. http://dx.doi.org/10.1039/c3cp43420f.

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Matsunaga, Nikita. "Molecular Conduction Characteristics from the Intrinsic Molecular Properties". Journal of Computational and Theoretical Nanoscience 3, nr 6 (1.12.2006): 957–63. http://dx.doi.org/10.1166/jctn.2006.3083.

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5

Rentschler, S., D. M. Vaidya, H. Tamaddon, K. Degenhardt, D. Sassoon, G. E. Morley, J. Jalife i G. I. Fishman. "Visualization and functional characterization of the developing murine cardiac conduction system". Development 128, nr 10 (15.05.2001): 1785–92. http://dx.doi.org/10.1242/dev.128.10.1785.

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The cardiac conduction system is a complex network of cells that together orchestrate the rhythmic and coordinated depolarization of the heart. The molecular mechanisms regulating the specification and patterning of cells that form this conductive network are largely unknown. Studies in avian models have suggested that components of the cardiac conduction system arise from progressive recruitment of cardiomyogenic progenitors, potentially influenced by inductive effects from the neighboring coronary vasculature. However, relatively little is known about the process of conduction system development in mammalian species, especially in the mouse, where even the histological identification of the conductive network remains problematic. We have identified a line of transgenic mice where lacZ reporter gene expression delineates the developing and mature murine cardiac conduction system, extending proximally from the sinoatrial node to the distal Purkinje fibers. Optical mapping of cardiac electrical activity using a voltage-sensitive dye confirms that cells identified by the lacZ reporter gene are indeed components of the specialized conduction system. Analysis of lacZ expression during sequential stages of cardiogenesis provides a detailed view of the maturation of the conductive network and demonstrates that patterning occurs surprisingly early in embryogenesis. Moreover, optical mapping studies of embryonic hearts demonstrate that a murine His-Purkinje system is functioning well before septation has completed. Thus, these studies describe a novel marker of the murine cardiac conduction system that identifies this specialized network of cells throughout cardiac development. Analysis of lacZ expression and optical mapping data highlight important differences between murine and avian conduction system development. Finally, this line of transgenic mice provides a novel tool for exploring the molecular circuitry controlling mammalian conduction system development and should be invaluable in studies of developmental mutants with potential structural or functional conduction system defects.
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6

Kumar, Avneesh, i Dong Wook Chang. "Proton Conducting Membranes with Molecular Self Assemblies and Ionic Channels for Efficient Proton Conduction". Membranes 12, nr 12 (22.11.2022): 1174. http://dx.doi.org/10.3390/membranes12121174.

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Supramolecular assemblies are vital for biological systems. This phenomenon in artificial materials is directly related to their numerous properties and their performance. Here, a simple approach to supramolecular assemblies is employed to fabricate highly efficient proton conducting molecular wires for fuel cell applications. Small molecule-based molecular assembly leading to a discotic columnar architecture is achieved, simultaneously with proton conduction that can take place efficiently in the absence of water, which otherwise is very difficult to obtain in interconnected ionic channels. High boiling point proton facilitators are incorporated into these columns possessing central ionic channels, thereby increasing the conduction multifold. Larger and asymmetrical proton facilitators disintegrated the self-assembly, resulting in low proton conduction efficiency. The highest conductivity was found to be approaching 10−2 S/cm for the molecular wires in an anhydrous state, which is ascribed to the continuous network of hydrogen bonds in which protons can hop between with a lower energy barrier. The molecular wires with ionic channels presented here have potential as an alternative to proton conductors operating under anhydrous conditions at both low and high temperatures.
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7

Selzer, Yoram, Marco A. Cabassi, Theresa S. Mayer i David L. Allara. "Thermally Activated Conduction in Molecular Junctions". Journal of the American Chemical Society 126, nr 13 (kwiecień 2004): 4052–53. http://dx.doi.org/10.1021/ja039015y.

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8

WEIGL, JOHN W. "PHOTOSENSITIZATION OF CONDUCTION IN MOLECULAR SOLIDS*". Photochemistry and Photobiology 16, nr 4 (2.01.2008): 291–304. http://dx.doi.org/10.1111/j.1751-1097.1972.tb06299.x.

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9

Park, Susanna B., Cindy S.-Y. Lin, David Burke i Matthew C. Kiernan. "Activity-dependent conduction failure: molecular insights". Journal of the Peripheral Nervous System 16, nr 3 (wrzesień 2011): 159–68. http://dx.doi.org/10.1111/j.1529-8027.2011.00358.x.

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10

Segal, Dvira, Abraham Nitzan, Mark Ratner i William B. Davis. "Activated Conduction in Microscopic Molecular Junctions". Journal of Physical Chemistry B 104, nr 13 (kwiecień 2000): 2790–93. http://dx.doi.org/10.1021/jp994296a.

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11

Segal, Dvira, i Abraham Nitzan. "Conduction in molecular junctions: inelastic effects". Chemical Physics 281, nr 2-3 (sierpień 2002): 235–56. http://dx.doi.org/10.1016/s0301-0104(02)00504-9.

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12

Fowler, P. W., B. T. Pickup, T. Z. Todorova i W. Myrvold. "A selection rule for molecular conduction". Journal of Chemical Physics 131, nr 4 (28.07.2009): 044104. http://dx.doi.org/10.1063/1.3182849.

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13

Ishida, Takao, Wataru Mizutani, Yoichiro Aya, Hisato Ogiso, Shinya Sasaki i Hiroshi Tokumoto. "Electrical Conduction of Conjugated Molecular SAMs Studied by Conductive Atomic Force Microscopy". Journal of Physical Chemistry B 106, nr 23 (czerwiec 2002): 5886–92. http://dx.doi.org/10.1021/jp0134749.

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14

Fowler, Patrick W., Martha Borg, Barry T. Pickup i Irene Sciriha. "Molecular graphs and molecular conduction: the d-omni-conductors". Physical Chemistry Chemical Physics 22, nr 3 (2020): 1349–58. http://dx.doi.org/10.1039/c9cp05792g.

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15

Cao, Bin, Ji-Wei Dong i Ming-He Chi. "Electrical Breakdown Mechanism of Transformer Oil with Water Impurity: Molecular Dynamics Simulations and First-Principles Calculations". Crystals 11, nr 2 (27.01.2021): 123. http://dx.doi.org/10.3390/cryst11020123.

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Water impurity is the essential factor of reducing the insulation performance of transformer oil, which directly determines the operating safety and life of a transformer. Molecular dynamics simulations and first-principles electronic-structure calculations are employed to study the diffusion behavior of water molecules and the electrical breakdown mechanism of transformer oil containing water impurities. The molecular dynamics of an oil-water micro-system model demonstrates that the increase of aging acid concentration will exponentially expedite thermal diffusion of water molecules. Density of states (DOS) for a local region model of transformer oil containing water molecules indicates that water molecules can introduce unoccupied localized electron-states with energy levels close to the conduction band minimum of transformer oil, which makes water molecules capable of capturing electrons and transforming them into water ions during thermal diffusion. Subsequently, under a high electric field, water ions collide and impact on oil molecules to break the molecular chain of transformer oil, engendering carbonized components that introduce a conduction electronic-band in the band-gap of oil molecules as a manifestation of forming a conductive region in transformer oil. The conduction channel composed of carbonized components will be eventually formed, connecting two electrodes, with the carbonized components developing rapidly under the impact of water ions, based on which a large number of electron carriers will be produced similar to “avalanche” discharge, leading to an electrical breakdown of transformer oil insulation. The water impurity in oil, as the key factor for forming the carbonized conducting channel, initiates the electric breakdown process of transformer oil, which is dominated by thermal diffusion of water molecules. The increase of aging acid concentration will significantly promote the thermal diffusion of water impurities and the formation of an initial conducting channel, accounting for the degradation in dielectric strength of insulating oil containing water impurities after long-term operation of the transformer.
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16

Merabia, Samy, Jean-Louis Barrat i Laurent J. Lewis. "Heat conduction across molecular junctions between nanoparticles". Journal of Chemical Physics 134, nr 23 (21.06.2011): 234707. http://dx.doi.org/10.1063/1.3600667.

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17

Banerjee, Parag, David Conklin, Sanjini Nanayakkara, Tae-Hong Park, Michael J. Therien i Dawn A. Bonnell. "Plasmon-Induced Electrical Conduction in Molecular Devices". ACS Nano 4, nr 2 (22.01.2010): 1019–25. http://dx.doi.org/10.1021/nn901148m.

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18

Pigeon, Simon, Lorenzo Fusco, Gabriele De Chiara i Mauro Paternostro. "Vibrational assisted conduction in a molecular wire". Quantum Science and Technology 2, nr 2 (22.05.2017): 025006. http://dx.doi.org/10.1088/2058-9565/aa6d42.

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19

Kaur, Rupan Preet, Ravinder Singh Sawhney i Derick Engles. "Conduction of Organic Molecular Junctions—A Review". Reviews in Theoretical Science 4, nr 3 (1.09.2016): 287–301. http://dx.doi.org/10.1166/rits.2016.1063.

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20

Bagrets, Alexei, Andreas Arnold i Ferdinand Evers. "Conduction Properties of Bipyridinium-Functionalized Molecular Wires". Journal of the American Chemical Society 130, nr 28 (lipiec 2008): 9013–18. http://dx.doi.org/10.1021/ja800459k.

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21

Galperin, Michael, Mark A. Ratner i Abraham Nitzan. "Raman Scattering from Nonequilibrium Molecular Conduction Junctions". Nano Letters 9, nr 2 (11.02.2009): 758–62. http://dx.doi.org/10.1021/nl803313f.

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22

Long, S. "Fast ion conduction in molecular plastic crystals". Solid State Ionics 161, nr 1-2 (lipiec 2003): 105–12. http://dx.doi.org/10.1016/s0167-2738(03)00208-x.

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23

Solomon, Gemma C., David Q. Andrews, Thorsten Hansen, Randall H. Goldsmith, Michael R. Wasielewski, Richard P. Van Duyne i Mark A. Ratner. "Understanding quantum interference in coherent molecular conduction". Journal of Chemical Physics 129, nr 5 (7.08.2008): 054701. http://dx.doi.org/10.1063/1.2958275.

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24

Yuge, Tatsuro, Nobuyasu Ito i Akira Shimizu. "Nonequilibrium Molecular Dynamics Simulation of Electric Conduction". Journal of the Physical Society of Japan 74, nr 7 (lipiec 2005): 1895–98. http://dx.doi.org/10.1143/jpsj.74.1895.

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25

Chen, Hao. "The first-principles calculation of molecular conduction". Frontiers of Physics in China 4, nr 3 (30.05.2009): 327–36. http://dx.doi.org/10.1007/s11467-009-0030-x.

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26

Galperin, Michael, i Abraham Nitzan. "Molecular optoelectronics: the interaction of molecular conduction junctions with light". Physical Chemistry Chemical Physics 14, nr 26 (2012): 9421. http://dx.doi.org/10.1039/c2cp40636e.

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27

Schröder, Christian, Vyacheslav Vikhrenko i Dirk Schwarzer. "Molecular Dynamics Simulation of Heat Conduction through a Molecular Chain". Journal of Physical Chemistry A 113, nr 51 (24.12.2009): 14039–51. http://dx.doi.org/10.1021/jp903546h.

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28

Yamamoto, Shin-ichi, i Kazufumi Ogawa. "The electrical conduction of conjugated molecular CAMs studied by a conductive atomic force microscopy". Surface Science 600, nr 18 (wrzesień 2006): 4294–300. http://dx.doi.org/10.1016/j.susc.2006.02.073.

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29

White, Steven M., i William C. Claycomb. "Embryonic stem cells form an organized, functional cardiac conduction system in vitro". American Journal of Physiology-Heart and Circulatory Physiology 288, nr 2 (luty 2005): H670—H679. http://dx.doi.org/10.1152/ajpheart.00841.2004.

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A functional pacemaking-conduction system is essential for maintaining normal cardiac function. However, no reproducible model system exists for studying the specialized cardiac pacemaking-conduction system in vitro. Although several molecular markers have been shown to delineate components of the cardiac conduction system in vivo, the functional characteristics of the cells expressing these markers remain unknown. The ability to accurately identify cells that function as cardiac pacemaking cells is crucial for being able to study their molecular phenotype. In differentiating murine embryonic stem cells, we demonstrate the development of an organized cardiac pacemaking-conduction system in vitro using the coexpression of the minK-lacZ transgene and the chicken GATA6 (cGATA6) enhancer. These markers identify clusters of pacemaking “nodes” that are functionally coupled with adjacent contracting regions. cGATA6-positive cell clusters spontaneously depolarize, emitting calcium signals to surrounding contracting regions. Physically separating cGATA6-positive cells from nearby contracting regions reduces the rate of spontaneous contraction or abolishes them altogether. cGATA6/ minK copositive cells isolated from embryoid cells display characteristics of specialized pacemaking-conducting cardiac myocytes with regard to morphology, action potential waveform, and expression of a hyperpolarization-activated depolarizing current. Using the cGATA6 enhancer, we have isolated cells that exhibit electrophysiological and genetic properties of cardiac pacemaking myocytes. Using molecular markers, we have generated a novel model system that can be used to study the functional properties of an organized pacemaking-conducting contracting system in vitro. Moreover, we have used a molecular marker to isolate a renewable population of cells that exhibit characteristics of cardiac pacemaking myocytes.
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30

Qu, Liyuan, Hiroaki Iguchi, Shinya Takaishi, Faiza Habib, Chanel F. Leong, Deanna M. D’Alessandro, Takefumi Yoshida, Hitoshi Abe, Eiji Nishibori i Masahiro Yamashita. "Porous Molecular Conductor: Electrochemical Fabrication of Through-Space Conduction Pathways among Linear Coordination Polymers". Journal of the American Chemical Society 141, nr 17 (17.04.2019): 6802–6. http://dx.doi.org/10.1021/jacs.9b01717.

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31

Landau, Arie, Abraham Nitzan i Leeor Kronik. "Cooperative Effects in Molecular Conduction II: The Semiconductor−Metal Molecular Junction†". Journal of Physical Chemistry A 113, nr 26 (2.07.2009): 7451–60. http://dx.doi.org/10.1021/jp900301f.

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32

Akdeniz, Z., i M. P. Tosia. "Ionic Conduction and Molecular Structure of Molten FeCl3". Zeitschrift für Naturforschung A 53, nr 12 (1.12.1998): 960–62. http://dx.doi.org/10.1515/zna-1998-1206.

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Abstract Former experiments on molten FeCl3 have shown that, as for AlCl3 , melting is accompanied by a transition from sixfold to essentially fourfold coordination. However, in contrast to AICI3, the FeCl3 melt near freezing has an appreciable ionic conductivity. We propose a model for the structure of FeCl3 melt as consisting of closely packed Fe2Cl6 bitetrahedral molecules in equilibrium with (Fe2Cl5) + and (Fe2Cl7)- ionised species.
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33

Qiu, M., Z. H. Zhang, X. Q. Deng i K. Q. Chen. "Conduction switching behaviors of a small molecular device". Journal of Applied Physics 107, nr 6 (15.03.2010): 063704. http://dx.doi.org/10.1063/1.3331928.

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34

Cruz-Chu, Eduardo R., Thorsten Ritz, Zuzanna S. Siwy i Klaus Schulten. "Molecular control of ionic conduction in polymer nanopores". Faraday Discussions 143 (2009): 47. http://dx.doi.org/10.1039/b906279n.

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35

Selzer, Yoram, Marco A. Cabassi, Theresa S. Mayer i David L. Allara. "Temperature effects on conduction through a molecular junction". Nanotechnology 15, nr 7 (19.05.2004): S483—S488. http://dx.doi.org/10.1088/0957-4484/15/7/057.

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36

Watanabe, Akihiro, i Susumu Kotake. "Study on Molecular Dynamics Mechanism of Heat Conduction." Transactions of the Japan Society of Mechanical Engineers Series B 59, nr 568 (1993): 3913–18. http://dx.doi.org/10.1299/kikaib.59.3913.

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37

Migliore, Agostino, i Abraham Nitzan. "Irreversibility and Hysteresis in Redox Molecular Conduction Junctions". Journal of the American Chemical Society 135, nr 25 (14.06.2013): 9420–32. http://dx.doi.org/10.1021/ja401336u.

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38

Segal, Dvira. "Thermal conduction in molecular chains: Non-Markovian effects". Journal of Chemical Physics 128, nr 22 (14.06.2008): 224710. http://dx.doi.org/10.1063/1.2938092.

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39

Wahiduzzaman, Mohammad, Shyamapada Nandi, Vibhav Yadav, Kiran Taksande, Guillaume Maurin, Hyungphil Chun i Sabine Devautour-Vinot. "Superionic conduction in a zirconium-formate molecular solid". Journal of Materials Chemistry A 8, nr 35 (2020): 17951–55. http://dx.doi.org/10.1039/d0ta05424k.

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40

HUANGFOENCHUNG, R. "Ionic conduction in LiI??,?-alumina: molecular dynamics study". Solid State Ionics 175, nr 1-4 (listopad 2004): 851–55. http://dx.doi.org/10.1016/j.ssi.2004.09.047.

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41

Liu, Qixin, Peixue Jiang i Heng Xiang. "Molecular dynamics simulations of non-Fourier heat conduction". Progress in Natural Science 18, nr 8 (sierpień 2008): 999–1007. http://dx.doi.org/10.1016/j.pnsc.2008.05.001.

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42

Troisi, Alessandro, Mark A. Ratner i Abraham Nitzan. "Vibronic effects in off-resonant molecular wire conduction". Journal of Chemical Physics 118, nr 13 (kwiecień 2003): 6072–82. http://dx.doi.org/10.1063/1.1556854.

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43

Fagas, Giorgos, Rafael Gutierrez, Klaus Richter, Frank Grossmann i Rüdiger Schmidt. "Manifestation of electrode surface states in molecular conduction". Macromolecular Symposia 212, nr 1 (kwiecień 2004): 103–12. http://dx.doi.org/10.1002/masy.200450810.

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44

Gorza, Luisa, Pompeo Volpe i Stefano Schiaffino. "Molecular and cellular biology of heart conduction system". Journal of Molecular and Cellular Cardiology 24 (sierpień 1992): S59. http://dx.doi.org/10.1016/0022-2828(92)91672-r.

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45

Jung, Mingyu, Shashank Shekhar, Duckhyung Cho, Myungjae Yang, Jeehye Park i Seunghun Hong. "Dipolar Noise in Fluorinated Molecular Wires". Nanomaterials 12, nr 8 (16.04.2022): 1371. http://dx.doi.org/10.3390/nano12081371.

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We demonstrate a strategy to directly map and quantify the effects of dipole formation on electrical transports and noises in the self-assembled monolayers (SAMs) of molecular wires. In this method, the SAM patterns of fluorinated molecules with dipole moments were prepared on conducting substrates, and a conducting probe in contact-mode atomic force microscopy was utilized to map currents and noises through the probe on the molecular patterns. The maps were analyzed to extract the characteristic parameters of dipolar noises in SAMs, and the results were compared with those of hydrogenated molecular patterns without dipole moments. At rather low bias conditions, the fluorinated molecular junctions exhibited a tunneling conduction and a resistance value comparable to that of the hydrogenated molecules with a six-times-longer length, which was attributed to stronger dipoles formation in fluorinated molecules. Interestingly, conductance (G) in different regions of fluorinated molecular patterns exhibited a strong correlation with a noise power spectral density of SI/I2 like SI/I2 ∝ G−2, which can be explained by enhanced barrier fluctuations produced by the dipoles of fluorinated molecules. Furthermore, we observed that the noise power spectral density of fluorinated molecules showed an anomalous frequency (f) dependence like SI/I2 ∝ 1/f1.7, possibly due to the slowing down of the tunneling of carriers from increased barrier fluctuations. In rather high bias conditions, conductions in both hydrogenated and fluorinated molecules showed a transition from tunneling to thermionic charge transports. Our results provide important insights into the effects of dipoles on mesoscopic transport and resistance-fluctuation in molecules and could have a significant impact on the fundamental understanding and applications in this area.
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46

Okazawa, Kazuki, Yuta Tsuji i Kazunari Yoshizawa. "Graph-theoretical exploration of the relation between conductivity and connectivity in heteroatom-containing single-molecule junctions". Journal of Chemical Physics 156, nr 9 (7.03.2022): 091102. http://dx.doi.org/10.1063/5.0083486.

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In this study, we employ the Sachs graph theory to formulate the conduction properties of a single-molecular junction consisting of a molecule in which one carbon atom of an alternant hydrocarbon is replaced with a heteroatom. The derived formula includes odd and even powers of the adjacency matrix, unlike the graph of the parental structure. These powers correspond to odd- and even-length walks. Furthermore, because the heteroatom is represented as a self-loop of unit length in the graph, an odd number of passes of the self-loop will change the parity of the length of the walk. To confirm the aforementioned effects of heteroatoms on conduction in an actual sample, the conduction behavior of meta-connected molecular junctions consisting of a heterocyclic six-membered ring, whose conductive properties have already been experimentally determined, was analyzed based on the enumerated number of walks.
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47

Sakaguchi, Hiroshi, Atsushi Hirai, Futoshi Iwata, Akira Sasaki, Toshihiko Nagamura, Etsuya Kawata i Seiichiro Nakabayashi. "Determination of performance on tunnel conduction through molecular wire using a conductive atomic force microscope". Applied Physics Letters 79, nr 22 (26.11.2001): 3708–10. http://dx.doi.org/10.1063/1.1421233.

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48

Shimazaki, Tomomi, i Koichi Yamashita. "A theoretical study of molecular conduction: IV. A three-terminal molecular device". Nanotechnology 18, nr 42 (13.09.2007): 424012. http://dx.doi.org/10.1088/0957-4484/18/42/424012.

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49

Kadoya, Tomofumi. "Molecular conductors composed from Organic-Transistor Materials". Impact 2020, nr 4 (13.10.2020): 38–39. http://dx.doi.org/10.21820/23987073.2020.4.38.

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Assistant Professor Tomofumi Kadoya is part of a team within the Graduate School of Material Science at the University of Hyogo in Japan. He is engaged with a range of different investigations related to conductive organic materials. One of the main focuses of Kadoya's research is organic transistors and organic charge-transfer (CT) complexes. CT complexes achieve conductivity by chemical doping but in organic transistors, conduction carriers are generated by field effect, where an electric field is used to control the flow of current. Among the many goals of the research, Kadoya and his team want to increase the methods and types of organic doping.
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50

Zheng-Johansson, J. "A molecular dynamics study of ionic conduction in CuI. II. Local ionic motion and conduction mechanisms". Solid State Ionics 83, nr 1-2 (styczeń 1996): 35–48. http://dx.doi.org/10.1016/0167-2738(95)00218-9.

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