ANI offers graphene films with diameters up to 13 cm and area densities of 0.1 to 2.0 mg/cm2. The graphene crystallites are tightly packed in the film. The graphene film density is approximately 1.5 - 2.0 g/cm3, which is comparable to the density of bulk graphite being 2.2 g/cm3. The film thickness is approximately 0.6 µm to over 10 µm.
Measurements of the thermal conductivity of a thick graphene film have been made using ASTM E1461 laser flash method by NETZSCH Instruments North America LLC. The following parameters were used for the calculation of the thermal conductivity: bulk density of the graphene film sample 1.55 g/cm3, temperature 25°C and specific heat Cp 0.73 J/gK. The measured thermal diffusivity is 1308 mm2/s. The in-plane thermal conductivity of the graphene foil sample was found to be 1480 W/mK. Measured sheet resistance of graphene films is in the range of 13 - 260 Ohm/sq.
Samples of graphene films were tested for tensile strength using a standard pull test. The average sample size was approximately 2 cm x 2 cm and the measured tension force was on the order of 10 N. The calculated ultimate tensile strength of as-prepared films is 167±16 MPa.
The graphene films were characterized as charge stripping foils for ions of different atomic mass and energy. The beam tests proved excellent charge stripping and lifetime characteristics of the graphene films.
Graphene Films Applications:
- Foils for charge stripping
- Radiation windows
- Gas cells
- Thermal management
- Electronic packaging
|Graphene Films Typical properties:|
|Area density||0.1 - 2.0 mg/cm2|
|Thickness||0.6 – 12 μm|
|Diameter||up to 13 cm|
|Bulk density||1.8±0.2 g/cm3|
|Thermal conductivity||1480 W/mK (||)|
|Sheet resistance||13 - 260 Ω/sq|
|Tensile strength||167±16 MPa|
If you have an application or interested in Graphene films, please contact us at sales(at)appliednanotech.net.