Graphene Institute

Graphene dispersions of nanoplates and nanoflakes (in solution)

We produce graphene dispersions of nanoplates and nanoflakes in three categories in different base fluids (mainly in distilled and deionized water) (see table 2). The concentration of graphene nanoflakes in water solution can vary from 0.2% to 5%. Higher concentrations of graphene or graphene oxide in the dispersion are produced from graphene pastes (see below).

Table 2

ParametersGraphene flakes №1
IG-GNF-1
Graphene flakes №2
IG-GNF-2
Graphene flakes №3
IG-GNF-3
Comments
Graphene purity> 99,4%> 98%> 97%Batch control
Defects densityVery lowVery lowVery lowPrimary control
Number of layers3 – 73 – 94 – 9Batch control
Content of Sp2> 91%> 90%> 90%Batch control
Thickness of graphene flakes (plates)1,5-3 nm2-3 nm3-4 nm
Lateral sizeto 100 μmtto 50 μmto 30 μm
Electrical conductivity(6-8)·105 Ohm/m(2-5)·105 Ohm/m(8-9)·104 Ohm/m
Thermal conductivity2500-3400 W/m·К1800-2900 W/m·К1400-2600 W/m·К
Optical transparency, %959493
True density1,9–2,2 g/cm31,9–2,2 g/cm31,9–2,2 g/cm3Bulk density
Content of hybridized carbon> 95%> 94%> 93%Primary control
ColourPractically blackPractically blackPractically black