As per the supplier, for spin-coating on glass, a standard iterative solvent cleaning protocol is recommended, involving 5 minutes of sonic cleaning in acetone, ethanol, and isopropanol, followed by blow-drying with N2 between each step, and then ozone plasma treatment (medium power for 2-5 minutes) to promote adhesion. The ink is also compatible with spin-coating on Si/SiO2 substrates, which can undergo the same pre-treatment protocol. When using the spin coater, spinning a single layer at 2000-5000 rpm results in a final film thickness of 40-60 nm. To achieve thicker films, multiple layers can be applied without a baking step, which is recommended over using a lower spin speed to maintain film uniformity. With 5 coats at 2000 rpm, a 200 nm thick film is obtained after baking at 300 °C for 30 minutes in air.
900960
Graphene dispersion
for spin/spray-coating, photonic annealing
Synonym(s):
Conductive ink, Graphene ink
About This Item
Recommended Products
Product Name
Graphene ink for spin/spray coating photonically annealable, for spin-coating, spray-coating, photonic annealing
Quality Level
form
dispersion (black)
greener alternative product characteristics
Design for Energy Efficiency
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sustainability
Greener Alternative Product
concentration
1.8-3.0 wt. % solids
resistivity
0.003-0.005 Ω-cm, sample prepared by spin-coating at 2000 rpm/30 s for 5 coats, followed by thermal annealing at 300 °C in air for 30 minutes
particle size
≤3 μm
viscosity
2-8 mPa.s(25 °C) (1000 s-1)
bp
78 °C (ethanol)
density
0.78-0.88 g/mL at 25 °C
greener alternative category
, Enabling
General description
Application
Spin-coating a single layer at 2000-5000 rpm yields a final film thickness of 40-60 nm. To achieve thicker films, multiple layers can be applied without a baking step. This is recommended over using a lower spin speed to maintain film uniformity. This ink should work on almost any substrate.
Electrical performance:
Following a baking step at 300 °C for 30 minutes in air, the spin-coated films exhibit sheet resistance of 300-800 Ω/sq, corresponding to a resistivity of 0.003-0.004 Ω−cm. With 5 coats at 2000 rpm, a 200 nm thick film with a sheet resistance of 160 Ω/sq. is obtained.
General guidelines:
Ethanol is recommended for cleaning up the ink and dried films, as well as dilution. Bath sonication (5-10 minutes) of the ink prior to use is recommended following extended periods of disuse.
Signal Word
Danger
Hazard Statements
Precautionary Statements
Hazard Classifications
Eye Dam. 1 - Flam. Liq. 2 - Skin Irrit. 2
Storage Class Code
3 - Flammable liquids
WGK
WGK 1
Flash Point(F)
54.5 °F - closed cup
Flash Point(C)
12.5 °C - closed cup
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Is there a documented recipe available for spin coating 900960, including details on the substrates it works well with (specifically regular glass slides), any pre-processing required to promote adhesion, the quantities needed, and the spin rpm-thickness characteristics?
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