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Code:
MP05
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Time Slot/Poster Number:
002
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Session:
Carbon based materials (nanotubes, graphene, carbon nanostructures)
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Resonance Raman Study of Carbon Nanotubes Interactions with Molecule-Based Magnets Derived from Cu(opba)2- Anions
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| Gustavo Do Nascimento1; Wdeson Barros1; Yoong Ahm Kim2; Hiroyukim Muramatsu2; Takuya Hayashi2; Morinobu Endo2; Marcos Pimenta1; Humberto Stumpf1
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1Universidade Federal de Minas Gerais, Belo Horizonte, Brazil; 2Faculty of Engineering, Shinshu University, Wakasato, Japan
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| View Abstract PDF |
| Summary |
The goal of this work is the modification of carbon nanotubes (single-, double-, and multi-walled samples) with Cu(opba)2- anions (where opba= orthophenylenebis (oxamato)), these anions can form molecular magnets with different metals, such as Mn2+. The characteristic Raman modes of the nanotubes were investigated (radial-breathing-modes (RBM), D and G band, and the second-order G’ band) for carbon samples having different amount of the inorganic complex. Different laser lines have been used in order to verify the influence of the type of the nanotubes (semiconducting or metallic) over the interactions with the metallic complex.
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Code:
MP05
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Time Slot/Poster Number:
003
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Session:
Carbon based materials (nanotubes, graphene, carbon nanostructures)
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Investigating the Carbon Structures of Crude Oil Deposits and Asphaltenes Combining Raman and ATR-FTIR Spectroscopy
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| Feng Tay; Sergei Kazarian
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Imperial College London, London, United Kingdom
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| View Abstract PDF |
| Summary |
Crude oil deposits and asphaltenes, which have been associated with levels of fouling in heat-exchangers, are typically complex mixtures with high contents of polycyclic aromatic hydrocarbons (PAHs). In this work, the complementary use of Raman and FTIR spectroscopy has been shown to be useful in characterising the carbon structures in these materials. Raman spectroscopy provides information regarding to the size of the PAHs and the order of the carbon structures while ATR-FTIR spectroscopy provides the degree of substitution and condensation of the PAHs. A better understanding of the PAHs in carbonaceous materials can be obtained using such a combined approach.
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Code:
MP05
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Time Slot/Poster Number:
004
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Session:
Carbon based materials (nanotubes, graphene, carbon nanostructures)
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New Proton Conductivity Material With The Heterocyclic Molecule: Structure and NIR-Raman Study
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| Jacek Wolak; Katarzyna Pogorzelec-Glaser
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Institute of Molecular Physics, Polish Academy of, Poznań, Poland
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| View Abstract PDF |
| Summary |
In this paper we present the results of NIR-Raman spectroscopy and structure studies of molecular complexes of triazole with citric acid.The crystal structures of the new compound is of a layer-type. In a single layer heterocyclic and carboxylic parts are connected by hydrogen bonds. These bonds form a network which enables proton transport.
The Raman studies revealed significant shifts of spectral lines for the complex with triazole with respect to pure citric acid [3]. This refers particularly to the stretching of the central carboxyl and the stretching of lateral carboxyls.
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Code:
MP05
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Time Slot/Poster Number:
005
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Session:
Carbon based materials (nanotubes, graphene, carbon nanostructures)
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High Magnetic Field Raman Spectroscopy of Electron Phonon Interactions in Graphene
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| Sebastian Remi1; Anna Swan1, 2; Bennett B. Goldberg1, 2
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1Boston University, Physics Department, Boston, MA; 2Boston University, ECE, Boston, Massachusetts
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| View Abstract PDF |
| Summary |
We present results of Raman scattering on single and bilayer graphene in magnetic fields up to 12T. The Raman G and 2D Band as well as transport are measured simultaneously as a function of carrier density. Initial experiments show a field dependent splitting of the G Band.
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Code:
MP05
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Time Slot/Poster Number:
006
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Session:
Carbon based materials (nanotubes, graphene, carbon nanostructures)
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Raman Spectroscopy And Scanning Tunneling Spectroscopy Of Graphene And Multilayer Of Graphene Deposited On The Gold Substrate
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| Agnieszka Sozańska1; Paweł Dąbrowski2; Igor Wlasny2; Jadwiga Sławińska4; Ilona Zasada3; Zbigniew Klusek2
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1Renishaw SPD, Gloucestershire, UK; 2University of Lodz, Poland; 3University of Lodz, Poland; 4University of Lodz, Poland
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| View Abstract PDF |
| Summary |
Graphene flakes with metal electrodes has been used to produce a new type of electronic devices and to achieve carbon gate-tunable systems. However, interactions between graphene and metals is still not understood well or even ignored. It seems to be obvious that understanding of the influence of metallic substrates/contacts on graphene physical properties is important for the future potential applications. We present studies of graphene deposited on conducting gold substrate using Raman spectroscopy (RS) and scanning tunneling microscopy/spectroscopy (STM/STS)
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Code:
MP05
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Time Slot/Poster Number:
007
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Session:
Carbon based materials (nanotubes, graphene, carbon nanostructures)
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Tensile Tests on Few-Layer Graphite/Polymer Composite
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| Barbara Grant; Giancarlo Pigozzi; Stephan Frank; Ralph Spolenak
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ETH Zürich, Zürich, Switzerland
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| View Abstract PDF |
| Summary |
Nanoscopically thin graphite is mechanically probed and investigated in-situ by micro Raman spectroscopy. Embedding graphite flakes into polymeric material allows for macroscopic tensile testing. As stress is applied to the composite, the Raman peaks shift in correlation to the local stress evolution in the graphite flake.
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Code:
MP05
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Time Slot/Poster Number:
008
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Session:
Carbon based materials (nanotubes, graphene, carbon nanostructures)
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In-Situ Raman Spectroscopy of Graphene Defects in Reducing Atmospheres at High Temperature
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| Robert Maher1; Ye Xiao1; HoKwon Kim2; Cecilia Mattevi2; Goki Eda2; Lesley Cohen1; Manish Chhowalla2
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1Department of Physics, Imperial College London, London, United Kingdom; 2Department of Materials, Imperial College London, London, United Kingdom
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| View Abstract PDF |
| Summary |
Single layers of carbon atoms, known as graphene, have been the subject of intense research in recent years due to their unique electronic properties. These properties make it an attractive material for a wide range of applications. A number of methods have been developed for large scale production of graphene although crystal quality remains an issue. In this paper we present an in-situ Raman study of graphene prepared using different methods in reducing atmospheres at high temperatures.
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Code:
MP05
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Time Slot/Poster Number:
009
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Session:
Carbon based materials (nanotubes, graphene, carbon nanostructures)
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Raman Spectra and Imaging of Graphene Layers Grown by SiC Sublimation
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| Denis Rouchon; Loïc Becerra; Khaled Kaja; Denis Mariolle; Nicolas Chevalier; Olivier Renault
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CEA/LETI, Grenoble, France
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| View Abstract PDF |
| Summary |
The recent developments on the growing of graphene layers on silicon carbide (SiC) offer new perspectives in the field of nano-electronic. Graphene is a plane crystal with the thickness of one carbon atom that behaves as semiconductor when made up of a few atomic layers with a lateral dimension of a few nanometers. In contrast to the case of carbon nanotubes, the plane structure makes it potentially compatible with existing micro-electronic technologies.
In this work, we present a micro-Raman spectroscopy study of graphene layers obtained by sublimation of SiC(0001) substrates for the realization of transistors.
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Code:
MP05
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Time Slot/Poster Number:
010
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Session:
Carbon based materials (nanotubes, graphene, carbon nanostructures)
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Observation of Multiple Vibration Resonances in Raman Spectrums of Fullerite С60 Under Electron Irradiation
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| Mykola Korniyenko; Mykola Kulish; Oksana Dmytrenko; Olena Pavlenko
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Kyiv National Taras Shevchenko University, Kyiv, Ukraine
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| View Abstract PDF |
| Summary |
Thin films of fullerenes (d=2 mkm, Si substrate) irradiated with electrons (E=1,8 MeV) were studied by Raman spectroscopy (Ar + laser, λL=514,5 and 488 nm, T= 295 К, intensity didn’t exceed ~2 W/cm2.). Doses of electron irradiation were increased from 1 to 25 МGy. Changes in crystal structure of fullerites were measured by means of X-ray’s diffraction (Co, λ=1,7902 A).
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Code:
MP05
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Time Slot/Poster Number:
011
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Session:
Carbon based materials (nanotubes, graphene, carbon nanostructures)
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Ion implantation effect on Resonance Raman spectroscopy of Double-Wall Carbon Nanotubes
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| Eduardo Ceretta Moreira1; Gilberto Dantas Saraiva2; Antonio Gomes Souza Filho3; Gabriel Braunstein4; H. Muramatsu5; Morinobu Endo5; Kim Yoong Ahm5; Mildred Dresselhaus6
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1Universidade Federal do Pampa, Bagé, Brazil; 2Universidade Estadual do Ceará, Fortaleza, Brazil; 3Universidade Federal do Ceará, Fortaleza, Brazil; 4Micron Technology Inc, Manassas, Virginia; 5Shinshu University, Nagano-shi , japan; 6Massachusetts Institute of Technology, Cambridge, Massachusetts
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| View Abstract PDF |
| Summary |
The effect of 170 keV Si and 100 keV C ion bombardment on the structure and properties of highly pure, double wall carbon nanotubes (DWNTs) has been investigated using resonance Raman spectroscopy. The implantations were performed at room temperature, with ion doses ranging between 1x1013 ions/cm2 and 1x1015 ions/cm2. As expected, the Si irradiation created more disorder than the C irradiation for the same ion fluence. For both species, as the ion implantation dosage increased, the D-band intensity increased, while the G-band intensity decreased, indicating increased lattice disorder, in analogous form to other
forms of grahite, and other nanotube types.
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Code:
MP05
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Time Slot/Poster Number:
012
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Session:
Carbon based materials (nanotubes, graphene, carbon nanostructures)
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Carbon Nanotube Strain Sensor by Using Micro-Raman Spectroscopy
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| Wei Qiu1; Yi-Lan Kang1; Zhen-Kun Lei2; Qiu Li1; Wei-Lin Deng1
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1Dept. of Mechanics, Tianjin University, Tianjin, China; 2Dalian University of Technology, Dalian, China
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| View Abstract PDF |
| Summary |
In this work, we present a study of carbon nanotube (CNT) Raman-strain sensor. The theoretical model of the CNT strain sensor is developed by applying the Raman properties of CNTs and calculating the contributions of uniformly dispersed CNTs to the entire Raman spectrum. This model provides the relationship between in-plane strain components and the spectral parameters detected through polarized Raman. Based on this model, a novel noncontact technique of strain measurement named Raman Strain Rosette is introduced. The experiments using this technique confirmed the CNT strain sensor is appropriate for measuring strain components at microscale by using polarized Raman spectroscopy.
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