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Graphene

Graphene　　Grapheneisanallotropeofcarbonintheformofatwo-dimensional,atomic-scale,hexagonallatticeinwhichoneatomformseachvertex.Itisthebasicstructuralelementofotherallotropes,includinggraphite,charcoal,carbonnanotubesandfullerenes.Itcanbeconsideredasanindefinitelylargearomaticmolecule,theultimatecaseofthefamilyofflatpolycyclicaromatichydrocarbons.GrapheneanditsbandstructureandDiraccones,effectofagridondoping.　　Graphenehasmanyunusualproperties.Itisabout200timesstrongerthanthestrongeststeel.Itefficientlyconductsheatandelectricityandisnearlytransparent.Grapheneshowsalargeandnonlineardiamagnetism,greaterthangraphiteandcanbelevitatedbyneodymiummagnets.　　Grapheneisatransparentandflexibleconductorthatholdspromiseforvariousmaterial/deviceapplications,includingsolarcells,light-emittingdiodes(LED),touchpanelsandsmartwindowsorphones.Forexample,Graphene-basedtouchpanelmoduleshavebeenusedinvolumetocellphone,wearabledeviceandhomeappliancemanufacturers. No.InstrumentTestitemInstrumentpictures1HighresolutiontransmissionelectronmicroscopyLayer2ScanningelectronmicroscopeMicroscopicmorphology3ElementalanalyzerDensityAshChemical%4XraydiffractometerLayerscondition5ICP-AESfullspectrumdirectreadingplasmaemissionspectrometerMetalioncontent6XPSanalyzerCarbonoxygenratio7BETtesterSpecificsurfacearea
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 　　Graphene

　　Graphene is an allotrope of carbon in the form of a two-dimensional, atomic-scale, hexagonal lattice in which one atom forms each vertex. It is the basic structural element of other allotropes, including graphite, charcoal, carbon nanotubes and fullerenes. It can be considered as an indefinitely large aromatic molecule, the ultimate case of the family of flat polycyclic aromatic hydrocarbons.Graphene and its band structure and Dirac cones, effect of a grid on doping.

　　Graphene has many unusual properties. It is about 200 times stronger than the strongest steel. It efficiently conducts heat and electricity and is nearly transparent. Graphene shows a large and nonlinear diamagnetism, greater than graphite and can be levitated by neodymium magnets.

　　Graphene is a transparent and flexible conductor that holds promise for various material/device applications, including solar cells, light-emitting diodes (LED), touch panels and smart windows or phones. For example, Graphene-based touch panel modules have been used in volume to cell phone, wearable device and home appliance manufacturers.

 

No.

Instrument

Test item

Instrument pictures

1

High resolution transmission electron microscopy

Layer

Graphene-check-01.jpg

2

Scanning electron microscope

Microscopic morphology

Graphene-check-02.jpg

3

Elemental analyzer

Density

Ash

Chemical%

Graphene-check-03.jpg

4

X ray diffractometer

Layers condition

Graphene-check-04.jpg

5

ICP-AES full spectrum direct reading plasma emission spectrometer

Metal ion content

Graphene-check-05.jpg

6

XPS analyzer

Carbon oxygen ratio

Graphene-check-06.jpg

7

BET tester

Specific surface area

Graphene-check-07.jpg

 

 

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