Raman Spectroscopy as a Tool to Address Individual Graphene Layers in Few-Layer Graphene

2012 ◽  
Vol 116 (35) ◽  
pp. 19046-19050 ◽  
Author(s):  
Martin Kalbac ◽  
Jing Kong ◽  
Mildred S. Dresselhaus
Keyword(s):  
Raman Spectroscopy ◽  
Graphene Layers ◽  
Layer Graphene ◽  
Few Layer Graphene

Graphene Layers on Silicon Carbide Studied by Raman Spectroscopy

2008 ◽  
Vol 600-603 ◽  
pp. 567-570 ◽  
Author(s):  
Jonas Röhrl ◽  
Martin Hundhausen ◽  
Konstantin V. Emtsev ◽  
Thomas Seyller ◽  
Lothar Ley
Keyword(s):  
Silicon Carbide ◽  
Raman Spectroscopy ◽  
Light Scattering ◽  
Graphene Layer ◽  
Monolayer Graphene ◽  
Spectroscopy Study ◽  
Graphene Layers ◽  
Layer Graphene ◽  
Micro Raman Spectroscopy ◽  
Few Layer Graphene

We present a micro-Raman spectroscopy study on single- and few layer graphene (FLG) grown on the silicon terminated surface of 6H-silicon carbide (SiC). On the basis of the 2D-line (light scattering from two phonons close to the K-point in the Brillouin zone) we distinguish graphene mono- from bilayers or few layer graphene. Monolayers have a 2D-line consisting of only one component, whereas more than one component is observed for thicker graphene layers. Compared to the graphite the monolayer graphene lines are shifted to higher frequencies. We tentatively ascribe the corresponding phonon hardening to strain in the first graphene layer.

scholarly journals Growth of Ordered Graphene Ribbons by Sublimation Epitaxy

Crystals ◽  
2018 ◽  
Vol 8 (12) ◽  
pp. 449
Author(s):  
Shuxian Cai ◽  
Xingfang Liu ◽  
Xin Zheng ◽  
Zhonghua Liu
Keyword(s):  
Substrate Surface ◽  
Graphene Film ◽  
Graphene Ribbon ◽  
High Quality ◽  
Graphene Layers ◽  
Force Microscopy ◽  
Layer Graphene ◽  
Micro Raman Spectroscopy ◽  
Atomic Force ◽  
Few Layer Graphene

Ordered graphene ribbons were grown on the surface of 4° off-axis 4H-SiC wafers by sublimation epitaxy, and characterized by using scanning electron microscopy (SEM), atomic force microscopy (AFM) and micro-Raman spectroscopy (μ-Raman). SEM showed that there were gray and dark ribbons on the substrate surface, and AFM further revealed that these ordered graphene ribbons had clear stepped morphologies due to surface step-bunching. It was shown by μ-Raman that the numbers of graphene layers of these two types of regions were different. The gray region was composed of mono- or bilayer ordered graphene ribbon, while the dark region was of tri- or few-layer ribbon. Meanwhile, ribbons were all homogeneous and had a width up to 40 μm and a length up to 1000 μm, without micro defects such as grain boundaries, ridges, or mono- and few-layer graphene mixtures. The results of this study are useful for optimized growth of high-quality graphene film on silicon carbide crystal.

Solid Phase Growth of Graphene on Silicon Carbide by Nickel Silicidation: Graphene Formation Mechanisms

2014 ◽  
Vol 778-780 ◽  
pp. 1162-1165
Author(s):  
Enrique Escobedo-Cousin ◽  
Konstantin Vassilevski ◽  
Toby Hopf ◽  
Nicholas Wright ◽  
Anthony G. O'Neill ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Solid Phase ◽  
Formation Mechanisms ◽  
Layer By Layer ◽  
Phase Growth ◽  
Force Microscopy ◽  
Layer Graphene ◽  
Atomic Force ◽  
High Temperature Stage ◽  
Few Layer Graphene

This work presents experimental evidence of the formation mechanisms of few-layer graphene (FLG) films on SiC by nickel silicidation. FLG is formed by annealing of a 40 nm thick Ni layer on 6H-SiC at 1035ºC for 60 s, resulting in a Ni2Si layer which may be capped by any Ni that did not react during annealing. It has been proposed that FLG forms on top of the Ni during the high temperature stage. In contrast, during cooling, carbon atoms which were released during the silicidation reaction may diffuse back towards the Ni2Si/SiC interface to form a second FLG film. After annealing, layer-by-layer de-processing was carried out in order to unequivocally identify the FLG at each location using Atomic force microscopy (AFM) and Raman spectroscopy.

Gamma ray-assisted irradiation of few-layer graphene films: a Raman spectroscopy study

2014 ◽  
Vol T162 ◽  
pp. 014025 ◽  
Author(s):  
D N Kleut ◽  
Z M Marković ◽  
I D Holclajtner Antunović ◽  
M D Dramićanin ◽  
D P Kepić ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Gamma Ray ◽  
Spectroscopy Study ◽  
Layer Graphene ◽  
Graphene Films ◽  
Few Layer Graphene

Raman spectroscopy on single- and few-layer graphene

2007 ◽  
Author(s):  
Davy Graf ◽  
Françoise Molitor ◽  
Klaus Ensslin ◽  
Christoph Stampfer ◽  
Alain Jungen ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Layer Graphene ◽  
Few Layer Graphene

Direct growth of etch pit-free GaN crystals on few-layer graphene

RSC Advances ◽  
2015 ◽  
Vol 5 (2) ◽  
pp. 1343-1349 ◽  
Author(s):  
Seung Jin Chae ◽  
Yong Hwan Kim ◽  
Tae Hoon Seo ◽  
Dinh Loc Duong ◽  
Seung Mi Lee ◽  
...  
Keyword(s):  
Vapour Deposition ◽  
Chemical Vapour ◽  
Organic Chemical ◽  
High Quality ◽  
Graphene Layers ◽  
Layer Graphene ◽  
Etch Pit ◽  
Direct Growth ◽  
Metal Organic ◽  
Few Layer Graphene

We report high-quality GaN crystals grown directly on graphene layers without a buffer layer by metal–organic chemical vapour deposition.

scholarly journals From Graphite to Laccase Biofunctionalized Few-Layer Graphene: A “One Pot” Approach Using a Chimeric Enzyme

2020 ◽  
Vol 21 (11) ◽  
pp. 3741
Author(s):  
Ilaria Sorrentino ◽  
Ilaria Stanzione ◽  
Yannig Nedellec ◽  
Alessandra Piscitelli ◽  
Paola Giardina ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
One Pot ◽  
Chimeric Enzyme ◽  
Chimeric Enzymes ◽  
Layer Graphene ◽  
Electrochemical Applications ◽  
Genetic Fusion ◽  
Few Layer Graphene ◽  
The Way

A chimeric enzyme based on the genetic fusion of a laccase with a hydrophobin domain was employed to functionalize few-layer graphene, previously exfoliated from graphite in the presence of the hydrophobin. The as-produced, biofunctionalized few-layer graphene was characterized by electrochemistry and Raman spectroscopy, and finally employed in the biosensing of phenols such as catechol and dopamine. This strategy paves the way for the functionalization of nanomaterials by hydrophobin domains of chimeric enzymes and their use in a variety of electrochemical applications.

Probing Layer Number and Stacking Order of Few-Layer Graphene by Raman Spectroscopy

Small ◽  
2010 ◽  
Vol 6 (2) ◽  
pp. 195-200 ◽  
Author(s):  
Yufeng Hao ◽  
Yingying Wang ◽  
Lei Wang ◽  
Zhenhua Ni ◽  
Ziqian Wang ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Layer Number ◽  
Layer Graphene ◽  
Stacking Order ◽  
Few Layer Graphene
Sign in / Sign up

Export Citation Format

Share Document