Dear colleagues,
I hope you are doing well. I am trying to get a uniform network of AgNWs on glass substrates from AgNWs dispersion in isopropyl alcohol (IPA), but I am finding some limitations. I use spin coating and drop casting methods. Before deposition, the glass substrate is cleaned by sonication in DI water with detergent, DI water, acetone, and IPA, respectively. After that, the substrate is dried by air and on a hot plate and treated by O2 plasma for 15 minutes to improve its hydrophilicity. Finally, drop casting or spin coating is performed. I tried many concentrations of AgNWs dispersion from 1 to 5 mg/ml. In case of spin coating, the density of the AgNWs on the substrate is very small and most of the nanowires are bent and/or have shorter lengths than the value provided by the supplier.
Please note that, different spin speeds (1000 - 3000 rpm) were used, but this didn't make a big difference.
For drop casting, the density of AgNWs is much bigger even at low concentrations, but there are many agglomerations and still the bending issue exists.
Also, the dispersion is stirred on a magnetic stirrer for (30 - 60) minutes before deposition.
Some SEM images are attached for clarification.
I'd be very grateful if you can give some advice to address the abovementioned issues.
Best regards,
Michael
Dear Michael Kamel . See the following useful RG links: Article Transparent Conductive Silver Nanowires Films on Glass Substrate
https://www.mdpi.com/2079-4991/11/3/693/pdf
Kindly see also the following useful links: Article Recent progress for silver nanowires conducting film for fle...
https://www.mdpi.com/2079-6412/11/5/499/pdf-vor
Also see also the following useful links: http://repository.lppm.unila.ac.id/15912/1/Genap_2019_Concentration%20Effect%20on%20The%20Thin%20Films%20of%20Silver%20Nanowires%20Fabricated.pdf
https://journal.unesa.ac.id/index.php/jpfa/article/view/3372/2806
The following RG link is also very useful: Article Flexible, Transparent, and Conductive Film Based on Random N...
https://www.frontiersin.org/articles/10.3389/fchem.2022.864186/full
Visit also the following useful link: Chapter Fabrication and Applications of Flexible Transparent Electro...
Article Highly flexible Ag nanowire network covered by a graphene ox...
Dear professor Aref Wazwaz Your suggestions are greatly appreciated. Thank you.
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