Relevant bibliographies by topics / Mesoscopic Nanotubes

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Book chapters
  4. Conference papers

Academic literature on the topic 'Mesoscopic Nanotubes'

Author: Grafiati
Published: 28 May 2022
Last updated: 30 May 2022

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Mesoscopic Nanotubes.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Journal articles on the topic "Mesoscopic Nanotubes"

1

Buehler, Markus J. "Mesoscale modeling of mechanics of carbon nanotubes: Self-assembly, self-folding, and fracture." Journal of Materials Research 21, no. 11 (2006): 2855–69. http://dx.doi.org/10.1557/jmr.2006.0347.

Full text
Abstract:
Using concepts of hierarchical multiscale modeling, we report development of a mesoscopic model for single-wall carbon nanotubes with parameters completely derived from full atomistic simulations. The parameters in the mesoscopic model are fit to reproduce elastic, fracture, and adhesion properties of carbon nanotubes, in this article demonstrated for (5,5) carbon nanotubes. The mesoscale model enables modeling of the dynamics of systems with hundreds of ultralong carbon nanotubes over time scales approaching microseconds. We apply our mesoscopic model to study self-assembly processes, including self-folding, bundle formation, as well as the response of bundles of carbon nanotubes to severe mechanical stimulation under compression, bending, and tension. Our results with mesoscale modeling corroborate earlier results, suggesting a novel self-folding mechanism, leading to creation of racket-shaped carbon nanotube structures, provided that the aspect ratio of the carbon nanotube is sufficiently large. We find that the persistence length of the (5,5) carbon nanotube is on the order of a few micrometers in the temperature regime from 300 to 1000 K.
APA, Harvard, Vancouver, ISO, and other styles
2

Bartels, Julian, Jan-Patrick Jürgens, Eduard Kuhn, and Vasily Ploshikhin. "Effects of curvature and alignment of carbon nanotubes on the electrical conductivity of carbon nanotube-reinforced polymers investigated by mesoscopic simulations." Journal of Composite Materials 53, no. 8 (2018): 1033–47. http://dx.doi.org/10.1177/0021998318794855.

Full text
Abstract:
Carbon nanotube-reinforced polymers belong to a class of composite materials, which have been largely investigated due to their special electrical, thermal and mechanical properties. In the case of electrical conductivity of carbon nanotube-reinforced polymer, a critical amount of carbon nanotubes as a filler material enables a sharp increase of electrical conductivity. At this certain volume fraction of carbon nanotubes, the material turns into a conductor because of the percolation effect. This effect occurs due to the formation of a closed pathway of filler material through the system. Mesoscopic simulation models of these materials were carried out to predict their electrical conductivity. In this paper, the effects of carbon nanotube curvature and their alignment parallel or perpendicular to the electrical flow direction inside a representative volume element were analysed and an optimized carbon nanotube distribution is presented. A network with a longest average path length per (rigid) carbon nanotube but also cross-linking (only nearly isotropic alignment) shows the best conductivity in the preferred direction.
APA, Harvard, Vancouver, ISO, and other styles
3

Joshua Kennedy, W. "Distinguishing Field Effects from Charge Effects in the Optoelectronic Properties of Carbon Nanotube Films." Journal of Nanoscience 2013 (July 7, 2013): 1–5. http://dx.doi.org/10.1155/2013/586208.

Full text
Abstract:
We have used charge-induced absorption to quantify the influence of injected charges on electroabsorption measurements in single-wall carbon nanotube films. The interpretations of experimental measurements of χ3 processes in nanotubes are simplified by taking into account the change in electron-electron interactions upon charge injection. Electroabsorption spectra that are properly corrected for charge-induced effects show remarkable agreement with a simple Stark shift of the exciton transitions with no notable second-derivative contributions. Thus, distinguishing electric field effects from carrier density effects allows for a more rigorous calculation of exciton polarizability from electroabsorption measurements, even in heterogeneous films. PACS: 78.67.Ch Nanotubes: optical properties of low-dimensional, mesoscopic, and nanoscale materials and structures.
APA, Harvard, Vancouver, ISO, and other styles
4

Tománek, David. "Mesoscopic origami with graphite: scrolls, nanotubes, peapods." Physica B: Condensed Matter 323, no. 1-4 (2002): 86–89. http://dx.doi.org/10.1016/s0921-4526(02)00989-4.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Latil, S., S. Roche, F. Triozon, J. Jiang, and R. Saito. "Mesoscopic transport in carbon nanotubes: novel features." physica status solidi (a) 203, no. 6 (2006): 1100–1104. http://dx.doi.org/10.1002/pssa.200566108.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Yan, Xiao-Ling, Hua-Fei Li, Chen Wang, et al. "Melamine as a single source for fabrication of mesoscopic 3D composites of N-doped carbon nanotubes on graphene." RSC Advances 8, no. 22 (2018): 12157–64. http://dx.doi.org/10.1039/c8ra01577e.

Full text
Abstract:
Integration of two-dimensional graphene and one-dimensional carbon nanotubes (CNTs) to create potentially useful 3D mesoscopic carbon structures with enhanced properties relative to the original materials is very desirable.
APA, Harvard, Vancouver, ISO, and other styles
7

Kane, Charles, Leon Balents, and Matthew P. A. Fisher. "Coulomb Interactions and Mesoscopic Effects in Carbon Nanotubes." Physical Review Letters 79, no. 25 (1997): 5086–89. http://dx.doi.org/10.1103/physrevlett.79.5086.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Li, Hao, Kun Cao, Jin Cui, et al. "14.7% efficient mesoscopic perovskite solar cells using single walled carbon nanotubes/carbon composite counter electrodes." Nanoscale 8, no. 12 (2016): 6379–85. http://dx.doi.org/10.1039/c5nr07347b.

Full text
Abstract:
Single-walled carbon nanotubes can help charge extraction in mesoscopic CH<sub>3</sub>NH<sub>3</sub>PbI<sub>3</sub>-based perovskite solar cells using TiO<sub>2</sub>/Al<sub>2</sub>O<sub>3</sub>/carbon as a scaffold.
APA, Harvard, Vancouver, ISO, and other styles
9

Ludford, Paul, Fikret Aydin, and Meenakshi Dutt. "Design and Characterization of Nanostructured Biomaterials via the Self-assembly of Lipids." MRS Proceedings 1498 (2013): 233–38. http://dx.doi.org/10.1557/opl.2013.342.

Full text
Abstract:
ABSTRACTWe are interested in designing nanostructured biomaterials using nanoscopic building blocks such as functionalized nanotubes and lipid molecules. In our earlier work, we summarized the multiple control parameters which direct the equilibrium morphology of a specific class of nanostructured biomaterials. Individual lipid molecules were composed of a hydrophilic head group and two hydrophobic tails. A bare nanotube encompassed an ABA architecture, with a hydrophobic shaft (B) and two hydrophilic ends (A). We introduced hydrophilic hairs at one end of the tube to enable selective transport through the channel. The dimensions of the nanotube were set to minimize its hydrophobic mismatch with the lipid bilayer. We used a Molecular Dynamics-based mesoscopic simulation technique called Dissipative Particle Dynamics which simultaneously resolves the structure and dynamics of the nanoscopic building blocks and the hybrid aggregate. The amphiphilic lipids and functionalized nanotubes self-assembled into a stable hybrid vesicle or a bicelle in the presence of a hydrophilic solvent. We showed that the morphology of the hybrid structures was directed by factors such as the temperature, the rigidity of the lipid molecules, and the concentration of the nanotubes. Another type of hybrid nanostructured biomaterial could be multi-component lipid bilayers. In this paper, we present approaches to design hybrid nanostructured materials using multiple lipid species with different chemistries and molecular chain stiffness.
APA, Harvard, Vancouver, ISO, and other styles
10

Koufos, Evan, and Meenakshi Dutt. "Designing Nanostructured Hybrid Inorganic-biological Materials via the Self-assembly." MRS Proceedings 1569 (2013): 51–56. http://dx.doi.org/10.1557/opl.2013.764.

Full text
Abstract:
ABSTRACTOur objective is to design nanostructured hybrid inorganic-biological materials using the selfassembly of functionalized nanotubes and lipid molecules. In this presentation, we summarize the multiple control parameters which direct the equilibrium morphology of a specific class of nanostructured biomaterials. Individual lipid molecules are composed of a hydrophilic head group and two hydrophobic tails. A bare nanotube encompasses an ABA architecture, with a hydrophobic shaft (B) and two hydrophilic ends (A). We introduce hydrophilic hairs at one end of the tube to enable selective transport through the channel. The dimensions of the nanotube are set to minimize its hydrophobic mismatch with the lipid bilayer. We use a Molecular Dynamicsbased mesoscopic simulation technique called Dissipative Particle Dynamics which simultaneously resolves the structure and dynamics of the nanoscopic building blocks and the hybrid aggregate. The amphiphilic lipids and functionalized nanotubes self-assemble into a stable hybrid vesicle or a bicelle in the presence of a hydrophilic solvent. We demonstrate that the morphology of the hybrid structures is directed by factors such as the temperature, the molecular rigidity of the lipid molecules, and the concentration of the nanotubes. We present material characterization of the equilibrium morphology of the various hybrid nanostructures. A combination of the material characterization and the morphologies of the hybrid aggregates can be used to predict the structure and properties of other hybrid materials.
APA, Harvard, Vancouver, ISO, and other styles
More sources

Dissertations / Theses on the topic "Mesoscopic Nanotubes"

1

Ghanem, Tarek Khairy. "Electronic transport in low dimensions [electronic resource] : carbon nanotubes and mesoscopic silver wires." College Park, Md.: University of Maryland, 2008. http://hdl.handle.net/1903/8841.

Full text
Abstract:
Thesis (Ph. D.) -- University of Maryland, College Park, 2008.<br>Thesis research directed by: Dept. of Physics. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.
APA, Harvard, Vancouver, ISO, and other styles
2

Shenashen, M. A., and S. A. El-Safty. "Visual Detection and Recovery of Mercury in Water and Blood Samples Using Nano-membrane Tubular Architectures." Thesis, Sumy State University, 2015. http://essuir.sumdu.edu.ua/handle/123456789/42664.

Full text
Abstract:
Engineered control over one-dimensional (1D) mesoporous silica nanotubes (NTs) inside anodic alumina membranes (AAMs) has led to various methods for detecting, visualizing, adsorbing, filtering, and recovering ultra-trace concentrations of toxic metal ions, such as Hg2+ and Pb2+, in water and blood. These often “one-pot” screening methods offer advantages over conventional methods in that they do not need sophisticated instruments or laborious sample preparation. This mesoscopic membrane sensor for the nakedeye detection micro-object have large surface area-to-volume ratios and uniformly shaped pores in threedimensional nanoscale gyroidal structures and its active sites consist of heteroatoms arranged around uniformly shaped pores in three-dimensional (3D) nanoscale gyroidal mesostructures densely coated with the chelating ligand so it permits ultra-fast, specific, pH-dependent visualization and removal of toxic metals at low concentrations from aqueous media, including drinking water and a suspension of red blood cells by means of a colorimetric signal visible to the naked eye, as well as by means of UV–vis reflectance spectroscopy. Removal of target ions from biological fluids was assessed by means of flow cytometric analysis. Our results demonstrate the potential for our membrane sensors to be used for preventing the health risks associated with exposure to toxic metal ions in the environment and blood.
APA, Harvard, Vancouver, ISO, and other styles
3

Cubaynes, Tino. "Shaping the spectrum of carbon nanotube quantum dots with superconductivity and ferromagnetism for mesoscopic quantum electrodynamics." Thesis, Sorbonne université, 2018. http://www.theses.fr/2018SORUS195/document.

Full text
Abstract:
Dans cette thèse, nous étudions des circuits de boîtes quantiques à base de nanotubes de carbone intégrés dans une cavité micro-onde. Cette architecture générale permet de sonder le circuit en utilisant simultanément des mesures de transport et des techniques propre au domaine de l’Electrodynamique quantique sur circuit. Les deux expériences réalisées durant cette thèse exploitent la capacité des métaux de contact à induire des corrélations de spins dans les boites quantiques. La première expérience est l’étude d’une lame s´séparatrice à paires de Cooper, initialement imaginée comme une source d’électrons intriqués. Le couplage du circuit aux photons dans la cavité permet de sonder la dynamique interne du circuit, et a permis d’observer des transitions de charge habillées par le processus de séparation des paires de Cooper. Le couplage fort entre une transition de charge dans un circuit de boîtes quantiques et des photons en cavité, a été observée pour la première fois dans ce circuit. Une nouvelle technique de fabrication a aussi été développé pour intégrer un nanotube de carbone cristallin au sein du circuit de boîtes quantiques. La pureté et l’accordabilité de cette nouvelle génération de circuit a rendu possible la seconde expérience. Cette dernière utilise deux vannes de spins non colinéaire afin de produire une interface cohérente entre le spin d’un électron dans une double boite quantique, et un photon dans une cavité. Des transitions de spins très cohérentes ont été observée, et nous donnons un modèle sur l’origine de la décohérence du spin comprenant le bruit en charge et les fluctuations des spins nucléaires<br>In this thesis, we study carbon nanotubes based quantum dot circuits embedded in a microwave cavity. This general architecture allows one to simultaneously probe the circuit via quantum transport measurements and using circuit quantum electrodynamics techniques. The two experiments realized in this thesis use metallic contacts of the circuit as a resource to engineer a spin sensitive spectrum in the quantum dots. The first one is a Cooper pair splitter which was originally proposed as a source of non local entangled electrons. By using cavity photons as a probe of the circuit internal dynamics, we observed a charge transition dressed by coherent Cooper pair splitting. Strong charge-photon coupling in a quantum dot circuit was demonstrated for the first time in such a circuit. A new fabrication technique has also been developed to integrate pristine carbon nanotubes inside quantum dot circuits. The purity and tunability of this new generation of devices has made possible the realization of the second experiment. In the latter, we uses two non-collinear spin-valves to create a coherent interface between an electronic spin in a double quantum dot and a photon in a cavity. Highly coherent spin transitions have been observed. We provide a model for the decoherence based on charge noise and nuclear spin fluctuations
APA, Harvard, Vancouver, ISO, and other styles
4

Herrmann, Lorentz. "Carbon Nanotubes as Cooper Pair Beam Splitters." Phd thesis, Université Pierre et Marie Curie - Paris VI, 2010. http://tel.archives-ouvertes.fr/tel-00528938.

Full text
Abstract:
We report on conductance measurements in carbon nanotube based double quantum dots connected to two normal electrodes and a central superconducting finger. By operating our devices as Cooper pair beam splitters, we provide evidence for Crossed Andreev Reflection (CAR). We inject Cooper pairs in the superconducting electrode and measure the differential conductance at both left and right arm. The contacts split the device into two coupled quantum dots. Each of the quantum dots can be tuned by a lateral sidegate. If the two sidegates are tuned such that both quantum dots are at a transmission resonance, a considerable part of the injected Cooper pairs splits into different normal contacts. On the contrary, if only one of the two dots is at resonance, nearly all pairs tunnel to the same normal contact. By comparing different triple points in the double dot stability diagram, we demonstrate the contribution of split Cooper pairs to the total current. In this manner, we are able to extract a splitting efficiency of up to 50% in the resonant case. Carbon Nanotubes ensure ballistic transport and long spin-flip scattering lengths. Due to these properties they are promising candidates to investigate EPR-type correlations in solid state systems.
APA, Harvard, Vancouver, ISO, and other styles
5

Teichert, Fabian [Verfasser], Michael [Akademischer Betreuer] Schreiber, Jörg [Akademischer Betreuer] Schuster, Michael [Gutachter] Schreiber, and Thomas [Gutachter] Frauenheim. "Quantum transport in defective carbon nanotubes at mesoscopic length scales / Fabian Teichert ; Gutachter: Michael Schreiber, Thomas Frauenheim ; Michael Schreiber, Jörg Schuster." Chemnitz : Technische Universität Chemnitz, 2019. http://d-nb.info/1219534714/34.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Bruhat, Laure. "Microwaves as a probe of quantum dot circuits : from Kondo dynamics to mesoscopic quantum electrodynamics." Thesis, Paris Sciences et Lettres (ComUE), 2016. http://www.theses.fr/2016PSLEE012/document.

Full text
Abstract:
Cette thèse utilise les micro-ondes pour étudier des circuits de boîtes quantiques à base de nanotubes de carbone. Dans une première expérience, l'excitation micro-onde est appliquée directement sur une électrode du circuit pour une boîte quantique dans le régime Kondo. Nous réalisons la première caractérisation fréquence-amplitude de la conductance Kondo à biais nul. Des données préliminaires sont en accord avec la prédiction d'universalité. Nous présentons deux autres expériences, où les boîtes quantiques sont insérées dans des résonateurs micro-ondes. Les photons de la cavité sondent la résistance de relaxation de charge et l'émission de photons dans une boîte quantique couplée à des réservoirs normaux et supraconducteurs, en présence de répulsion coulombienne. Nos observations valident une modélisation en termes de réponse linéaire du circuit. Nous présentons aussi la première implémentation d'une lame séparatrice à paires de Cooper en cavité. Le régime de couplage fort est atteint, une première avec des circuits de boîtes quantiques. Nos résultats renforcent l'idée que l'électrodynamique quantique mésoscopique est une boîte à outils fructueuse, aussi bien dans le contexte du domaine du transport quantique que dans celui de l'information quantique<br>This thesis uses microwaves as probe of carbon nanotube quantum dot circuits. In a first experiment, a microwave excitation is directly applied to a circuit electrode for a quantum dot in the Kondo regime. We provide the first frequency-amplitude characterisation of the Kondo zero-bias conductance. Preliminary data are consistent with predicted universal behaviour. We present two other experiments, where quantum dot circuits are embedded in microwave resonators. Cavity photons probe charge relaxation resistance and photon-emission in a quantum dot coupled to normal and superconducting reservoirs in presence of Coulomb repulsion. Our observations validate a modelling in terms of the circuit linear response. We also present the first implementation of a Cooper pair splitter in cavity. The strong coupling regime is achieved, a premiere with quantum dot circuits. Our findings support the idea, that mesoscopic quantum electrodynamics is a fruitful toolbox in the context of both fields of quantum transport and quantum information science
APA, Harvard, Vancouver, ISO, and other styles
7

Franck, Pierre. "Mesoscopic electromagnetic model of carbon-nanotube arrays and scalable technological processes : Application to the fabrication of novel antennasCo-dirigée par Beng Kang Tay." Limoges, 2013. http://aurore.unilim.fr/theses/nxfile/default/6358938e-2b7f-488e-a1d0-6bd8f7e045e6/blobholder:0/2013LIMO4043.pdf.

Full text
Abstract:
We report the efforts lead in the design and fabrication of novel antennas from carbon nanotubes (CNTs) to assess their practicality in diverse usage scenarios. CNT-based antennas could help improve the performance of electrically-small antennas but may also allow the development of novel structures such as optically-controlled reflectarrays. They also represent an interesting technology for millimeter-wave and THz applications. Significant progress has been made on each of the four intertwined axes pertaining to these special antennas, modeling, analysis, fabrication and characterization. This has allowed designing and fabricating the first electrically-short CNT antenna prototypes and determining preliminary photocurrent trends. Indeed, we have derived an original mesoscopic model for the electromagnetic properties of aligned arrays of nano-elements with a special focus on CNTs to match simulation and fabrication capabilities. In parallel, we have reproduced and developed CNT growth and deposition techniques and established scalable fabrication processes. Additionally, an analytical model for CNT-based monopole antennas has been derived from transmission line theory. By combining modeling, analysis, simulation and fabrication, we have finally achieved the design and fabrication of CNT-based monopole antenna prototypes. The techniques have also been applied to the fabrication of CNT-based photocurrent samples which have been extensively characterized to highlight optimal illumination conditions and assess expectable performances as a base for future designs<br>Nous présentons une étude de faisabilité d’antennes innovantes basées sur les propriétés particulières des nanotubes de carbone (NTC). Celles-ci pourraient permettre une amélioration des performances des antennes électriquement courtes mais aussi le développement de systèmes innovants tels que des réseaux réflecteurs à commande optique. Ce pourrait aussi être une technologie intéressante pour les applications en plein essor dans les domaines des ondes millimétriques et terahertz. Des avancées significatives ont été réalisées suivant les quatre axes interdépendants qui régissent ces antennes : modélisation des NTC, analyse des antennes basées sur les NTC, fabrication à partir de NTC et caractérisation. Ceci nous a permis d’une part de concevoir et de fabriquer les premiers prototypes d’antennes électriquement courtes à base de NTC et d’autre part de mettre en évidence des tendances dans la réponse des NTC sous illumination. En effet, en utilisant une approche mésoscopique, nous avons développé un modèle électromagnétique original pour les ensembles de nano-éléments alignés, en particulier les NTC, permettant leur intégration dans des logiciels de simulation électromagnétique classiques et donc la mise en correspondance des possibilités de fabrication et de simulation. En parallèle nous avons reproduit et développé des méthodes de croissance et de dépôt de NTC et établi des procédés de fabrication pouvant être adaptés à grande échelle. De plus, un modèle analytique des antennes monopôles à base de NTC a été établi à partir d’une approche ligne de transmission. Ces techniques nous ont permis de mettre en avant les compromis nécessaires dans la conception d’antennes de taille réduite à base de NTC et ainsi de concevoir et fabriquer de premiers prototypes. Elles ont aussi été appliquées à la fabrication de structures de test pour une caractérisation des NTC sous illumination. Ceci nous a permis de mettre en évidence les conditions optimales pour générer un courant photoélectrique dans les NTC et d’évaluer les performances pouvant être attendues comme base pour de futurs systèmes
APA, Harvard, Vancouver, ISO, and other styles
8

Grimm, Daniel. "A combined experimental and theoretical approach towards the understanding of transport in one-dimensional molecular nanostructures." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2008. http://nbn-resolving.de/urn:nbn:de:bsz:14-ds-1218037048209-51309.

Full text
Abstract:
This thesis comprises detailed experimental and theoretical investigations of the transport properties of one-dimensional nanostructures. Most of the work is dedicated to the exploration of the fascinating effects occurring in single wall carbon nanotubes (SWCNT). These particular nanostructures gained an overwhelming interest in the past two decades due to its outstanding electronic and mechanical features. We have investigated the properties of a novel family of carbon nanostructures, named here as Y-shaped rings. The studies show that they present very interesting quantum interference effects. A high structural stability under tensile strain and elevated temperatures is observed. Within the semi-classical potential adopted, the critical strain values of structure rupture lie in the same range of their pristine SWCNT counterparts. This is directly verified by the first observations of these ring-like structures in a transmission electron microscopy. A merging process of asymmetric into symmetric rings is investigated in-situ under electron beam irradiation at high temperatures. The electronic properties of these systems are theoretically studied using Monte Carlo simulations and environment dependent tight-binding calculations. From our results, we address the possibility of double-slit like interference processes of counter-propagating electron waves in the ring-like structures. The nature of well defined, sharp peaks in the density of states are determined as the discrete eigenenergies of the central loop part. Furthermore, the formation and dispersion of standing waves inside the ring is shown to originate from the quantum-dot like confinement of each branch between the leads. The obtained dispersion relation is shown to be the same occurring in purely one-dimensional quantum dots of similar geometries. Furthermore, Fabry-Perot-like interferences are observed. We established at the IFW a bottom-up processing route to fabricate nanotube based electronic devices. The SWCNTs are grown by chemical vapor deposition and we present a detailed study of the different approaches to obtain individual nanotubes suitable for a successful integration into electronic devices. Wet-chemistry and ultra-thin films as well as ferritin were employed as catalyst particles in the growth of SWCNT samples. By adjusting the optimized process parameters, we can control the obtained yield from thick nanotube forests down to just a couple of free-standing individual SWCNTs. The nanotubes are localized, contacted by standard e-beam lithography and characterized at ambient- as well as liquid helium temperatures. We usually obtain quite transparent contacts and the devices exhibit metallic or a mixed metallic/semiconducting behavior. The well-known memory effect upon gate voltage sweeping as well as single electron tunneling in the Coulomb blockade regime are addressed.
APA, Harvard, Vancouver, ISO, and other styles
9

Desjardins, Matthieu. "Exploring quantum circuits with a cQed architecture : application to compressibility measurements." Thesis, Paris Sciences et Lettres (ComUE), 2016. http://www.theses.fr/2016PSLEE044/document.

Full text
Abstract:
Les circuits électroniques mesurés à des températures cryogéniques permettent d'étudier le comportement quantique des électrons. En particulier, les circuits de boites quantiques sont des systèmes accordables modèles pour l'étude des électrons fortement corrélés, symbolisée par l'effet Kondo. Dans cette thèse, des circuits de boîtes quantiques à base de nanotube de carbone sont intégrés à des cavités micro-onde coplanaires, avec lesquelles l'électrodynamique quantique en cavité (cQED) a atteint un degré de contrôle remarquable de l'interaction lumière-matière. Les photons de la cavité micro-onde sont ici utilisés pour sonder la dynamique de charge dans le circuit de boîtes quantiques. Plus précisément, la cavité micro-onde de grande finesse nous a permis de mesurer la compressibilité du gas d'électrons dans une boîte avec une sensibilité sans précédent. Des mesures simultanées de transport électronique et de la compressibilité montrent que la résonance Kondo observées dans la conductance est transparente aux photons micro-ondes. Cela révèle le gel de la dynamique de charge dans la boîte quantique pour ce mécanisme particulier de transport d'électrons et illustre que la résonance Kondo à N-corps dans la conductance est associée aux corrélations issues des fluctuations de spin d'une charge gelée. Nous étudions aussi dans cette thèse la possible émergence d'une nouvelle quasi-particule, appelée état lié de Majorana, et qui serait sa propre anti-particule. Dans ce but, une grille ferromagnétique a été placée sous le nanotube pour créer un couplage spin-orbit artificiel. L'observation d'états d'Andreev dans un tel dispositif est un premier pas prometteur vers la détection avec une architecture cQED d'états liés de Majorana dans les nanotubes de carbone<br>On-chip electronic circuits at cryogenic temperature are instrumental to studying the quantum behavior of electrons. In particular, quantum dot circuits represent tunable model systems for the study of strong electronic correlations, epitomized by the Kondo effect. In this thesis, carbon nanotube based-quantum dot circuits are embedded in coplanar microwave cavities, with which circuit quantum electrodynamics (cQED) has reached a high degree of control of the light-matter interaction. Here, microwave cavity photons are used to probe the charge dynamics in the quantum dot circuit. More precisely, the high finesse cavity allows us to measure the compressibility of the electron gas in the dot with an unprecedented sensitivity. Simultaneous measurements of electronic transport and compressibility show that the Kondo resonance observed in the conductance is transparent to microwave photons. This reveals the predicted frozen charge dynamics in the quantum dot for this peculiar electron transport mechanism and illustrates that the many-body Kondo resonance in the conductance is associated to correlations arising from spin fluctuations of a frozen charge. A second quantum phenomenon addressed in this thesis is the possible emergence of a new quasi-particle in condensed matter, called Majorana bound state, which would be its own anti-particle. For that purpose, a ferromagnetic gate has been placed below a nanotube in order to generate a synthetic spin-orbit coupling. The observation of Andreev bound states in such a device is a first promising step towards the detection with a cQED architecture of Majorana bound states in a carbon nanotube
APA, Harvard, Vancouver, ISO, and other styles
10

Urdampilleta, Matias. "Spintronique moléculaire de la vanne de spin à la détection d'un spin unique." Phd thesis, Université de Grenoble, 2012. http://tel.archives-ouvertes.fr/tel-00770488.

Full text
Abstract:
Spintronique moléculaire : de la vanne de spin à la détection d'un spin unique. Parmi les thématiques qui ont émergé ces dix dernières années, la spintronique moléculaire est intéressante de par son caractère hybride, à la croisée entre l'électronique de spin, l'électronique moléculaire et le magnétisme moléculaire. Dans ce nouveau domaine, on cherche à exploiter les propriétés magnétiques et quantiques des aimants moléculaires pour créer des dispositifs originaux, utiles en spintronique ou en information quantique. Mon projet de thèse s'inscrit dans cette perspective en voulant combiner un transistor à nanotube de carbone avec des aimants à molécule unique, en les couplant par des interactions supramoléculaires. L'objectif est d'observer le renversement magnétique d'une seule molécule par des mesures de transport électronique à travers le nanotube. En effet, le diamètre de ce dernier étant comparable aux dimensions d'un aimant moléculaire, le couplage devrait être suffisamment fort pour en permettre la détection. La réalisation d'un tel dispositif, un défi technique, et la question de savoir s'il était réellement possible de détecter et de caractériser le moment d'une seule molécule ont constitué les deux enjeux majeurs de cette thèse. Une grande partie du travail réalisé porte sur la fabrication du dispositif expérimental par des techniques de micro- et nano-fabrication, ainsi que sur l'optimisation du greffage des aimants moléculaires sur la surface du nanotube. Dans un second temps, nous nous intéressons à l'étude du système et à son comportement à très basse température (100 mK). En effet, la proximité des aimants moléculaires TbPc2 modifie de façon spectaculaire les propriétés de transport d'un nanotube. En particulier, nous présentons la réalisation d'un dispositif dont la réponse est analogue à une vanne de spin classique, où les molécules magnétiques jouent le rôle de polariseur ou d'analyseur de spin. Grâce à ce système, nous avons réussi à affiner nos connaissances sur TbPc2. Entre autres résultats, nous sommes parvenus à isoler et à caractériser le retournement du moment magnétique d'un seul ion de terbium. Enfin, la dernière partie de cette thèse est consacrée à l'étude de l'interaction hyperfine au sein du terbium. En réalisant un dispositif qui n'est couplé qu'à deux molécules, nous avons mis en évidence qu'il est possible de réaliser une lecture directe de l'état d'un spin nucléaire unique.
APA, Harvard, Vancouver, ISO, and other styles
More sources

Book chapters on the topic "Mesoscopic Nanotubes"

1

Kasuya, Atsuo, Yahachi Saito, Yoshiro Sasaki, et al. "Size-dependent Characteristics of Single-wall Carbon Nanotubes." In Mesoscopic Materials and Clusters. Springer Berlin Heidelberg, 1999. http://dx.doi.org/10.1007/978-3-662-08674-2_33.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Steinhart, Martin. "Mesoscopic Structure Formation in the Walls of Nanotubes Confined to Nanoporous Hard Templates." In Molecular- and Nano-Tubes. Springer US, 2011. http://dx.doi.org/10.1007/978-1-4419-9443-1_5.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Volkov, Alexey N., and Leonid V. Zhigilei. "Massively Parallel Mesoscopic Simulations of Gas Permeability of Thin Films Composed of Carbon Nanotubes." In Computational Fluid Dynamics 2010. Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-17884-9_104.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Haruyama, J., I. Takesue, Y. Sato, and K. Hijioka. "Coulomb Blockade in Single Tunnel Junction Connected to Nanowire and Carbon Nanotube." In Quantum Mesoscopic Phenomena and Mesoscopic Devices in Microelectronics. Springer Netherlands, 2000. http://dx.doi.org/10.1007/978-94-011-4327-1_10.

Full text
APA, Harvard, Vancouver, ISO, and other styles

Conference papers on the topic "Mesoscopic Nanotubes"

1

Kulkarni, Ajit R., Suryasarathi Bose, Arup R. Bhattacharyya, Shyamalendu M. Bose, S. N. Behera, and B. K. Roul. "Electrical Conductivity in Polymer Blends∕ Multiwall Carbon Nanotubes." In MESOSCOPIC, NANOSCOPIC AND MACROSCOPIC MATERIALS: Proceedings of the International Workshop on Mesoscopic, Nanoscopic and Macroscopic Materials (IWMNMM-2008). AIP, 2008. http://dx.doi.org/10.1063/1.3027194.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Volkov, Alexey N., Kiril R. Simov, and Leonid V. Zhigilei. "Mesoscopic Model for Simulation of CNT-Based Materials." In ASME 2008 International Mechanical Engineering Congress and Exposition. ASMEDC, 2008. http://dx.doi.org/10.1115/imece2008-68021.

Full text
Abstract:
A mesoscopic computational model is developed for simulation of the collective behavior of carbon nanotubes (CNTs) in CNT-based materials. The model adopts a coarse-grained representation of a CNT as a sequence of stretchable cylindrical segments defined by a chain of nodes. The dynamic behavior of CNTs is governed by the equations of motion for the nodes, enabling computationally efficient “molecular dynamics-type” simulations. The internal part of the mesoscopic force field takes into account stretching and bending of individual CNTs. A novel computationally-efficient “tubular” potential method is developed for the description of van der Waals interactions among the nanotubes. The parameterization of the “tubular” potential is based on an interatomic potential for non-bonded interactions between carbon atoms. The application of the mesoscopic model to simulation of systems consisting of hundreds of CNTs demonstrates perfect energy conservation for times as long as tens of nanoseconds. Self-assembly of CNTs into bundles with hexagonal ordering of nanotubes is observed in simulations performed for systems with initial random orientation of CNTs.
APA, Harvard, Vancouver, ISO, and other styles
3

Hussain, S., A. K. Pal, Shyamalendu M. Bose, S. N. Behera, and B. K. Roul. "Incorporation Of Nanocrystalline Silver on Carbon Nanotubes by Electrodeposition Technique." In MESOSCOPIC, NANOSCOPIC AND MACROSCOPIC MATERIALS: Proceedings of the International Workshop on Mesoscopic, Nanoscopic and Macroscopic Materials (IWMNMM-2008). AIP, 2008. http://dx.doi.org/10.1063/1.3027196.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

BAILEY, S. W. D., DAVID TOMÁNEK, YOUNG-KYUN KWON, and C. J. LAMBERT. "MAGNETO-CONDUCTANCE IN TWISTED CARBON NANOTUBES." In Toward the Controllable Quantum States - International Symposium on Mesoscopic Superconductivity and Spintronics (MS+S2002). WORLD SCIENTIFIC, 2003. http://dx.doi.org/10.1142/9789812705556_0082.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

JENSEN, ANE, JESPER NYGÅRD, and JØRN BORGGREEN. "SINGLE-WALL CARBON NANOTUBES WITH FERROMAGNETIC ELECTRODES." In Toward the Controllable Quantum States - International Symposium on Mesoscopic Superconductivity and Spintronics (MS+S2002). WORLD SCIENTIFIC, 2003. http://dx.doi.org/10.1142/9789812705556_0006.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Volkov, Alexey, Kiril Simiov, and Leonid Zhigilei. "Mesoscopic Simulation of Self-assembly of Carbon Nanotubes into a Network of Bundles." In 47th AIAA Aerospace Sciences Meeting including The New Horizons Forum and Aerospace Exposition. American Institute of Aeronautics and Astronautics, 2009. http://dx.doi.org/10.2514/6.2009-1544.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

HARUYAMA, J., S. MIYADAI, N. KOBAYASHI, M. NOMURA, and D. SATO. "SUPPRESSION OF COOPER-PAIR BREAKING AGAINST HIGH MAGNETIC FIELDS IN CARBON NANOTUBES." In Proceedings of the International Symposium on Mesoscopic Superconductivity and Spintronics — In the Light of Quantum Computation. WORLD SCIENTIFIC, 2005. http://dx.doi.org/10.1142/9789812701619_0016.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Anand, Sandeep V., D. Roy Mahapatra, Niraj Sinha, J. T. W. Yeow, and R. V. N. Melnik. "Field Emission Efficiency of a Carbon Nanotube Array Under Parasitic Nonlinearities." In ASME 2010 International Mechanical Engineering Congress and Exposition. ASMEDC, 2010. http://dx.doi.org/10.1115/imece2010-39558.

Full text
Abstract:
Carbon Nanotubes (CNTs) grown on substrates are potential electron sources in field emission applications. Several studies have reported the use of CNTs in field emission devices, including field emission displays, X-ray tube, electron microscopes, cathode-ray lamps, etc. Also, in recent years, conventional cold field emission cathodes have been realized in micro-fabricated arrays for medical X-ray imaging. CNT-based field emission cathode devices have potential applications in a variety of industrial and medical applications, including cancer treatment. Field emission performance of a single isolated CNT is found to be remarkable, but the situation becomes complex when an array of CNTs is used. At the same time, use of arrays of CNTs is practical and economical. Indeed, such arrays on cathode substrates can be grown easily and their collective dynamics can be utilized in a statistical sense such that the average emission intensity is high enough and the collective dynamics lead to longer emission life. The authors in their previous publications had proposed a novel approach to obtain stabilized field emission current from a stacked CNT array of pointed height distribution. A mesoscopic modeling technique was employed, which took into account electro-mechanical forces in the CNTs, as well as transport of conduction electron coupled with electron–phonon induced heat generation from the CNT tips. The reported analysis of pointed arrangements of the array showed that the current density distribution was greatly localized in the middle of the array, the scatter due to electrodynamic force field was minimized, and the temperature transients were much smaller compared to those in an array with random height distribution. In the present paper we develop a method to compute the emission efficiency of the CNT array in terms of the amount of electrons hitting the anode surface using trajectory calculations. Effects of secondary electron emission and parasitic capacitive nonlinearity on the current-voltage signals are accounted. Field emission efficiency of a stacked CNT array with various pointed height distributions are compared to that of arrays with random and uniform height distributions. Effect of this parasitic nonlinearity on the emission switch-on voltage is estimated by model based simulation and Monte Carlo method.
APA, Harvard, Vancouver, ISO, and other styles
9

Modi, Ashish, Jonghwan Suhr, Nikhil Koratkar, Eric Lass, and Pulickel Ajayan. "Temperature Effects on Resistivity of Mesoscopic Nanotube Ensembles." In 44th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference. American Institute of Aeronautics and Astronautics, 2003. http://dx.doi.org/10.2514/6.2003-1767.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Bose, S. M., S. N. Behera, S. Gayen, Shyamalendu M. Bose, S. N. Behera, and B. K. Roul. "Theory of Raman Spectra of Unfilled and Filled Carbon Nanotube." In MESOSCOPIC, NANOSCOPIC AND MACROSCOPIC MATERIALS: Proceedings of the International Workshop on Mesoscopic, Nanoscopic and Macroscopic Materials (IWMNMM-2008). AIP, 2008. http://dx.doi.org/10.1063/1.3027193.

Full text
APA, Harvard, Vancouver, ISO, and other styles
You might also be interested in the extended bibliographies on the topic 'Mesoscopic Nanotubes' for particular source types:
Journal articles Dissertations / Theses
We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!

To the bibliography