Ariga, K.

Erni, R.

Hill, J.P.

Khalakhan, I.

Malik, S.

Vijayaraghavan, A.

English

Hill, J. P.

KITopen

^<ITKarlsruhe Institute of TechnologyCharacterization of Graphene made by Chemical Intercalation: EMPA,, (HRTEM, SEM, Raman and AFM.Sharali Malik,3 Aravind Vijayaraghavan,ab Rolf Erni,cKatsuhiko Ariga,d Ivan Khalakhan,de and Jonathan P. Hill.daKarlsruhe Institute of Technology (KIT), Institute of Nanotechnology, D-76344, Karlsruhe, Germany.Email: sharali.malik@kit.edubUniversity of Manchester, School of Computer Science, Manchester, M13 9PL, UK.cElectron Microscopy Center, Swiss Federal Laboratories for Materials Testing and Research (EMPA), Dübendorf, Switzerland.dWPI-Center for Materials Nanoarchitectonics, National Institute for Materials Science (NIMS), Namiki 1-1, Tsukuba, Japan.Department of Surface and Plasma Science, Faculty of Mathematics and Physics,Charles University, Praha 8, Czech Republic.Currently, the interest of physicists in graphene is enormous, but the interest of chemists has so far not been as great,probably resulting from the absence of well-established large scale methods to produce graphene. Therefore, the mostimportant role chemists can play is the establishment of an inexpensive and simple wet-chemical method for makinggraphene, For example, intercalation Compounds of graphite have been of interest for many years [1], More than 100reagents can be intercalated into graphite [2], Here, we describe an intercalation method to make clean graphene that hasgood electrica! properties (Fig 5) [3], The graphene material was characterized by TEM (Fig 1), AFM (Fig 2), Raman (Fig 3)and SEM (Fig 4).Fig. 4 SEM of graphene Single sheet, double sheet andmultilayer. Contrast is due to the presence or absence ofdelocalised TT-bonding. The thickness of the monolayergraphene is 2.42A (SEM performed by Dr. Heiner Jaksch,Carl Zeiss NTS GmbH, Oberkochen, Germany)Fig. 2 AFM of monolayer graphene flakeFig. 1 (a) TEM overview of a graphene flake (b) Electrondiffraction of few-layer region, showing the stacking withorientational mismatch of the sheets (c) Diffraction patternfrom a Single layer region (d) HRTEM detail revealing thepresence of clean, Single, and bi-layer graphene areasFig. 5 (a) Scanning electron micrograph of a region of themicro-electrode array showing 10 of the electrode pairs(b) SEM detail of one such device, and the correspondingFET transfer characteristics is shown in (c)Fig 3 The G' spectra of:-(a)	monolayer graphene flake(b)	bi-layer graphene flake(c)	FLG graphene flake and(d)	HOPG.—i—¦—i—¦—i—>—i—-—i	[1] Annu Rev Mater Sei, 1976; 6: 181-211.2650 2700 2750 2800 2850	ni A/-1., DUwo Onm- d- 1Raman shm (cm")	[2] Adv Phys, 2002, 51.1.[3] Nanoscale, 2010; 2: 2139-2143KIT - University of the State of Baden-Wuerttemberg andNational Research Center of the Helmholtz Association

Characterzation of graphene made by chemical intercalation: HRTEM, SEM, Raman and AFM

https://publikationen.bibliothek.kit.edu/220091974/3816323

Characterzation of graphene made by chemical intercalation: HRTEM, SEM, Raman and AFM

Abstract

Similar works

Full text

Available Versions

KITopen