scholarly journals Raman spectra of out-of-plane phonons in bilayer graphene

2011 ◽  
Vol 84 (3) ◽  
Author(s):  
Kentaro Sato ◽  
Jin Sung Park ◽  
Riichiro Saito ◽  
Chunxiao Cong ◽  
Ting Yu ◽  
...  
Keyword(s):  
Raman Spectra ◽  
Bilayer Graphene ◽  
Out Of Plane

Raman spectra of twisted CVD bilayer graphene

Carbon ◽  
2017 ◽  
Vol 123 ◽  
pp. 302-306 ◽  
Author(s):  
Pankaj Ramnani ◽  
Mahesh R. Neupane ◽  
Supeng Ge ◽  
Alexander A. Balandin ◽  
Roger K. Lake ◽  
...  
Keyword(s):  
Raman Spectra ◽  
Bilayer Graphene

Raman spectra of twisted bilayer graphene close to the magic angle

2D Materials ◽  
2022 ◽  
Author(s):  
Tiago Campolina Barbosa ◽  
Andreij C. Gadelha ◽  
Douglas A. A. Ohlberg ◽  
Kenji Watanabe ◽  
Takashi Taniguchi ◽  
...  
Keyword(s):  
Raman Spectra ◽  
Laser Excitation ◽  
Bilayer Graphene ◽  
Geometrical Model ◽  
Excitation Wavelength ◽  
Magic Angle ◽  
Phonon Interaction ◽  
Electron Phonon Interaction ◽  
Excitation Laser ◽  
Twisted Bilayer Graphene

Abstract In this work, we study the Raman spectra of twisted bilayer graphene samples as a function of their twist-angles (θ), ranging from 0.03º to 3.40º, where local θ are determined by analysis of their associated moiré superlattices, as imaged by scanning microwave impedance microscopy. Three standard excitation laser lines are used (457, 532, and 633 nm wavelengths), and the main Raman active graphene bands (G and 2D) are considered. Our results reveal that electron-phonon interaction influences the G band's linewidth close to the magic angle regardless of laser excitation wavelength. Also, the 2D band lineshape in the θ < 1º regime is dictated by crystal lattice and depends on both the Bernal (AB and BA) stacking bilayer graphene and strain soliton regions (SP) [1]. We propose a geometrical model to explain the 2D lineshape variations, and from it, we estimate the SP width when moving towards the magic angle.

Probing the electrostatic environment of bilayer graphene using Raman spectra

2009 ◽  
Vol 80 (15) ◽  
Author(s):  
Paola Gava ◽  
Michele Lazzeri ◽  
A. Marco Saitta ◽  
Francesco Mauri
Keyword(s):  
Raman Spectra ◽  
Bilayer Graphene

Vibrational Assignments of Organosilanetriols. II. Crystalline Phenylsilanetriol and Phenylsilanetriol-D3

1978 ◽  
Vol 32 (5) ◽  
pp. 469-479 ◽  
Author(s):  
H. Ishida ◽  
J. L. Koenig
Keyword(s):  
Fourier Transform ◽  
Raman Spectra ◽  
Vibrational Modes ◽  
Torsional Mode ◽  
Vibrational Assignments ◽  
Laser Raman ◽  
Sioh Group ◽  
Laser Raman Spectra ◽  
Out Of Plane ◽  
Bending Modes

Fourier transform infrared spectra (3800 to 450 cm−1) and laser Raman spectra (4000 to 0 cm−1) of crystalline phenylsilanetriol and phenylsilanetriol-d3, and liquid state phenylsilanetriol and phenylsilanetriol-d3 are first reported. Complete band assignments are attempted. All vibrational modes of the SiOH group except for the SiC torsional mode, including the SiOH in-plane and out-of-plane bending modes, are observed. In addition to the phenylsilanetriols, infrared and laser Raman spectra of crystalline diphenylsilanediol and triphenylsilanol are also studied to aid the band assignments.

scholarly journals Engineering of the thermodynamic properties of bilayer graphene by atomic plane rotations: the role of the out-of-plane phonons

Nanoscale ◽  
2015 ◽  
Vol 7 (30) ◽  
pp. 12851-12859 ◽  
Author(s):  
Alexandr I. Cocemasov ◽  
Denis L. Nika ◽  
Alexander A. Balandin
Keyword(s):  
Thermodynamic Properties ◽  
Atomic Plane ◽  
Bilayer Graphene ◽  
Out Of Plane

Probing 2D sub-bands of bi-layer graphene

RSC Advances ◽  
2014 ◽  
Vol 4 (92) ◽  
pp. 51067-51071 ◽  
Author(s):  
Cheng-Wen Huang ◽  
Bing-Jie Lin ◽  
Sung-Yen Juang ◽  
Fu-Yu Shih ◽  
Wei-Hua Wang ◽  
...  
Keyword(s):  
Raman Spectra ◽  
Bilayer Graphene ◽  
Layer Graphene ◽  
Surface Enhanced ◽  
Surface Enhanced Raman

Investigations of Raman spectra and surface enhanced Raman spectra (SERS) of supported and suspended bilayer graphene were realized.

scholarly journals Comment on “Raman spectra of misoriented bilayer graphene”

2009 ◽  
Vol 79 (23) ◽  
Author(s):  
Zhenhua Ni ◽  
Yingying Wang ◽  
Ting Yu ◽  
Yumeng You ◽  
Zexiang Shen
Keyword(s):  
Raman Spectra ◽  
Bilayer Graphene

The infra-red absorption bands associated with the COOH and COOD groups in dimeric carboxylic acids. I. The region from 1500 to 500 cm -1

1953 ◽  
Vol 216 (1125) ◽  
pp. 247-266 ◽  
Keyword(s):  
Carboxylic Acids ◽  
Raman Spectra ◽  
Crystalline Solid ◽  
Cooh Group ◽  
Absorption Bands ◽  
Solid States ◽  
Infra Red ◽  
Out Of Plane ◽  
Stretching Vibrations ◽  
Skeletal Deformation

The infra-red spectra of a considerable number of carboxylic acids and their COOD derivatives have been investigated between 1500 and 500 cm -1, as dimeric units in the liquid or crystalline solid states. Under these conditions the COOH group is shown usually to give rise to strong absorption bands in the regions 1420 ±20, 1300 ± 15 and 935 ± 15 cm -1 . The first two of these are found to correspond to closely coupled OH deformation and C—O stretching vibrations occurring in the plane of the (COOH) 2 dimeric ring; the latter is caused by the out-of-plane OH deformation vibration. COOD groups have absorption bands in the ranges 1350 ±50, 1050 ± 10 and 675 ±25 cm -1 , which can be assigned respectively to the C—O stretching mode and the in-plane and out-of-plane OD deformation vibrations. Less constant absorption bands of the COOH group between 700 and 575 cm -1 are attributed to O—C = O skeletal deformation vibrations, and the corresponding bands are found at slightly lower frequencies in the spectra of the COOD derivatives. The results of the infra-red investigation are compared with the Raman spectra of such acids and with related infra-red and Raman frequencies of other molecules. Infra-red spectra of some equimolecuiar mixtures of acids with water have also been studied.

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