Dear fried Vishnu Ps:

I hope this message finds you well! I wanted to share some insights on spin coating with graphene, as I know it can be quite challenging, especially when working with ITO glass. Here are a few tips that might help you achieve a more even coating:

Solution Preparation: Ensure that your graphene is well-dispersed in the solvent, whether you’re using methanol or MPN. Ultrasonication can be particularly effective in breaking up agglomerates, leading to a more uniform dispersion.

Concentration: It might be beneficial to experiment with different concentrations of graphene in your solvent. Sometimes, a lower concentration can yield a more uniform film, so don’t hesitate to try varying this.

Substrate Cleaning: Thoroughly clean your ITO glass before spin coating. Contaminants can significantly impact the coating's uniformity. A standard cleaning protocol involving successive baths in acetone and isopropanol, followed by drying, can be very effective.

Spin Coating Parameters: Adjust not only the spin speed but also the duration and acceleration. Each of these parameters can influence how the graphene distributes across the substrate.

Solvent Choice: If methanol or MPN isn't giving you the desired results, consider trying solvents like NMP or DMF, which are known for better graphene dispersion.

Surface Modification: If you’re still facing challenges, think about modifying the ITO glass surface to enhance its affinity for graphene. This could involve using a primer layer or functionalizing the surface to improve adhesion.

Experiment with these suggestions and adjust based on your observations. It often takes some trial and error to find the right balance, but I’m confident you’ll get there. Good luck, and feel free to reach out if you have any questions!

An interesting article to read:

Article Hierarchical Ni-Mn Double Layered/Graphene Oxide with Excell...

Please feel free to watch this video which can provide an important insight:

https://youtu.be/OG1Gt_QdrOI?si=KGn5eC1HO8hG1TOE

Best regards,

Kaushik