Forming Weakly Interacting Multilayers of Graphene Using Atomic Force Microscope Tip Scanning and Evidence of Competition between Inner and Outer Raman Scattering Processes Piloted by Structural Defects

被引：3

作者：

Pardanaud, C. ^{[1
]}

Merlen, A. ^{[2
]}

Gratzer, K. ^{[3
]}

Chuzel, O. ^{[3
]}

Nikolaievskyi, D. ^{[1
,3
]}

Patrone, L. ^{[2
,6
]}

Clair, S. ^{[2
]}

Ramirez-Jimenez, R. ^{[4
,5
]}

de Andres, A. ^{[5
]}

Roubin, P. ^{[1
]}

Parrain, J. -L. ^{[3
]}

机构：

[1] Aix Marseille Univ, CNRS, PIIM, Marseille, France

[2] Univ Toulon & Var, Aix Marseille Univ, CNRS, IM2NP, Marseille, France

[3] Aix Marseille Univ, CNRS, Cent Marseille, ISm2, Marseille, France

[4] Univ Carlos III Madrid, Escuela Politecn Super, Dept Fis, Ave Univ 30, Madrid 28911, Spain

[5] CSIC, Inst Ciencia Mat Madrid, Plaza Murillo 2, E-28049 Madrid, Spain

[6] IM2NP, CNRS, UMR 7334, ISEN Yncrea Mediterranee, Toulon, France

来源：

JOURNAL OF PHYSICAL CHEMISTRY LETTERS | 2019年 / 10卷 / 13期

关键词：

LINE-SHAPE; INTERFERENCE; SPECTROSCOPY; LAYER; DEPENDENCE; SPECTRUM; ORDER; PROBE; AREA;

D O I：

10.1021/acs.jpclett.9b00564

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We report on an alternative route based on nanomechanical folding induced by an AFM tip to obtain weakly interacting multilayer graphene (wi-MLG) from a chemical vapor deposition (CVD)-grown single-layer graphene (SLG). The tip first cuts and then pushes and folds graphene during zigzag movements. The pushed graphene has been analyzed using various Raman microscopy plots-A(D)/A(G) X E-L(4) vs Gamma(G), omega(2D) VS Gamma(2D), Gamma(2D) vs Gamma(G), omega(2D+/-) vs Gamma(2D+/-), and A(2D-)/A(2D+) vs A(2D)/A(G). We show that the SLG in-plane properties are maintained under the folding process and that a few tens of graphene layers are stacked, with a limited number of structural defects. A blue shift of about 20 cm(-1) of the 2D band is observed. The relative intensity of the 2D_ and 2D+ bands have been related to structural defects, giving evidence of their role in the inner and outer processes at play close to the Dirac cone.

引用

页码：3571 / +

页数：17

共 60 条

[31] Modification of electronic band structure in mL plus nL (m=1, 2; n=1-5) free-stacking graphene [J].