Raman spectroscopy of molecular models for the detection and the study of carbon nanostructures in graphitic materials

2001 ◽  
Author(s):  
C. Castiglioni
Keyword(s):  
Raman Spectroscopy ◽  
Carbon Nanostructures ◽  
Molecular Models

Raman Spectroscopy of Carbon Nanostructures: Nonlinear Effects and Anharmonicity

2012 ◽  
pp. 137-165 ◽  
Author(s):  
A. P. Naumenko ◽  
N. E. Korniyenko ◽  
V. M. Yashchuk ◽  
Srikanth Singamaneni ◽  
Valery N. Bliznyuk
Keyword(s):  
Raman Spectroscopy ◽  
Carbon Nanostructures ◽  
Nonlinear Effects

scholarly journals Raman spectroscopy as a tool to investigate the structure and electronic properties of carbon-atom wires

2015 ◽  
Vol 6 ◽  
pp. 480-491 ◽  
Author(s):  
Alberto Milani ◽  
Matteo Tommasini ◽  
Valeria Russo ◽  
Andrea Li Bassi ◽  
Andrea Lucotti ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Carbon Atom ◽  
Electronic Properties ◽  
Carbon Nanostructures ◽  
Short Review ◽  
Atomic Scale ◽  
Current Status ◽  
Wire Length ◽  
Molecular Group ◽  
Surface Enhanced Raman

Graphene, nanotubes and other carbon nanostructures have shown potential as candidates for advanced technological applications due to the different coordination of carbon atoms and to the possibility of π-conjugation. In this context, atomic-scale wires comprised of sp-hybridized carbon atoms represent ideal 1D systems to potentially downscale devices to the atomic level. Carbon-atom wires (CAWs) can be arranged in two possible structures: a sequence of double bonds (cumulenes), resulting in a 1D metal, or an alternating sequence of single–triple bonds (polyynes), expected to show semiconducting properties. The electronic and optical properties of CAWs can be finely tuned by controlling the wire length (i.e., the number of carbon atoms) and the type of termination (e.g., atom, molecular group or nanostructure). Although linear, sp-hybridized carbon systems are still considered elusive and unstable materials, a number of nanostructures consisting of sp-carbon wires have been produced and characterized to date. In this short review, we present the main CAW synthesis techniques and stabilization strategies and we discuss the current status of the understanding of their structural, electronic and vibrational properties with particular attention to how these properties are related to one another. We focus on the use of vibrational spectroscopy to provide information on the structural and electronic properties of the system (e.g., determination of wire length). Moreover, by employing Raman spectroscopy and surface enhanced Raman scattering in combination with the support of first principles calculations, we show that a detailed understanding of the charge transfer between CAWs and metal nanoparticles may open the possibility to tune the electronic structure from alternating to equalized bonds.

Carbon Nanostructures Synthesize from Coconut Coir Dust Mediated by Layered Clays through Hydrothermal Process

2012 ◽  
Vol 727-728 ◽  
pp. 1355-1359 ◽  
Author(s):  
Gabriela Borin Barin ◽  
Thalita Santos Bispo ◽  
Iara de Fátima Giminenez ◽  
Ledjane Silva Barreto
Keyword(s):  
Raman Spectroscopy ◽  
Renewable Resources ◽  
Carbon Nanostructures ◽  
Hydrothermal Process ◽  
Carbon Phase ◽  
Transmission Electron ◽  
Layered Clays ◽  
Coir Dust ◽  
Coconut Coir ◽  
Technological Platform

Brazil has a large potential for energy generation and development of new materials from renewable resources through eco-friendly routes, which presents an alternative for construction of an eco-technological platform, where the entire lifecycle of the material or industrial product be sustainable. The proposal of the present work was synthesize carbon nanostructures from coconut coir dust and via template synthesis mediated by layered clays through hydrothermal process. The obtained materials were characterized by Raman Spectroscopy, Fourier Transform Infrared Spectroscopy and Scanning Electron Microscope (SEM). Carbon phase formation was indicated by infrared results with bands at 1444 cm-1and 1512 cm-1assigned to C=C of aromatic groups. Raman spectroscopy results showed presence of carbonaceous species by the appearance of D and G bands assigned to disordered and graphitic crystallites, respectively. SEM results showed overlapping sheets and plates formation. High Resolution Transmission Electron Microscopy measures are in progress.

Surface enhanced Raman spectroscopy of carbon nanostructures

2006 ◽  
Vol 600 (18) ◽  
pp. 3723-3728 ◽  
Author(s):  
E. Perevedentseva ◽  
A. Karmenyan ◽  
P.-H. Chung ◽  
Y.-T. He ◽  
C.-L. Cheng
Keyword(s):  
Raman Spectroscopy ◽  
Carbon Nanostructures ◽  
Surface Enhanced Raman Spectroscopy ◽  
Surface Enhanced ◽  
Surface Enhanced Raman

Raman Spectroscopy of Carbon Nanostructures

2010 ◽  
Author(s):  
F. Villalpando-Paez ◽  
G. Dresselhaus ◽  
M. S. Dresselhaus ◽  
P. M. Champion ◽  
L. D. Ziegler
Keyword(s):  
Raman Spectroscopy ◽  
Carbon Nanostructures

scholarly journals Fully Hydrogenated and Fluorinated Bigraphenes–Diamanes: Theoretical and Experimental Studies

2021 ◽  
Vol 7 (1) ◽  
pp. 17
Author(s):  
Leonid A. Chernozatonskii ◽  
Victor A. Demin ◽  
Dmitry G. Kvashnin
Keyword(s):  
Raman Spectroscopy ◽  
Carbon Nanostructures ◽  
Recent Progress ◽  
Experimental Studies ◽  
Multilayer Graphene ◽  
Practical Realization ◽  
Atomic Structures ◽  
Theoretical Predictions ◽  
Potential Applications ◽  
Nanocrystal Films

Diamanes are 2D diamond-like films that are nanometers in thickness. Diamanes can exist as bilayer or multilayer graphene with various modes of stacking and interlayer covalent sp3 bonds. The term “diamane” is used broadly for a variety of diamond-like materials at the nanoscale, from individual diamond clusters to nanocrystal films. A short overview of recent progress in the investigation of diamanes, starting from the first theoretical predictions to practical realization, is presented. The results of both theoretical and experimental studies on diamanes with various atomic structures and types of functionalization are considered. It is shown that diamanes are stronger than graphene and graphane and have wide bandgaps ranging from 3.1 to 4.5 eV depending on the structure. Diamane-like structures have been obtained using different experimental techniques, and their structures have been determined by Raman spectroscopy. The potential applications of these carbon nanostructures are briefly reviewed.

scholarly journals Raman Spectroscopy in Graphene-Based Systems: Prototypes for Nanoscience and Nanometrology

2012 ◽  
Vol 2012 ◽  
pp. 1-16 ◽  
Author(s):  
Ado Jorio
Keyword(s):  
Raman Spectroscopy ◽  
Carbon Nanostructures ◽  
External Factors ◽  
New Developments ◽  
One Dimensional ◽  
Resonance Effects ◽  
The Past ◽  
Different Types ◽  
Effect Of Disorder

Raman spectroscopy is a powerful tool to characterize the different types of sp2 carbon nanostructures, including two-dimensional graphene, one-dimensional nanotubes, and the effect of disorder in their structures. This work discusses why sp2 nanocarbons can be considered as prototype materials for the development of nanoscience and nanometrology. The sp2 nanocarbon structures are quickly introduced, followed by a discussion on how this field evolved in the past decades. In sequence, their rather rich Raman spectra composed of many peaks induced by single- and multiple-resonance effects are introduced. The properties of the main Raman peaks are then described, including their dependence on both materials structure and external factors, like temperature, pressure, doping, and environmental effects. Recent applications that are pushing the technique limits, such as multitechnique approach and in situ nanomanipulation, are highlighted, ending with some challenges for new developments in this field.

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