I've done several silanization tests with different solutions and here is a brief of my results:
DichloroDimethylSilan: Advancing=90, Receding=56
ChloroTrimethylSilan: Adv=91, Rec=70
OctaDecylTrichloroSilan: Adv=108, Rec=90
TetraEthoxySilan: Adv=90, Rec=44
OctaDecylTrichloroSilan+ChloroTrimethylSilan(50%): Adv=89, Rec=74
I didn't dilute any of the above solutions and since I want to achieve Maximum Hydrophobicity I gave enough time (~20 min) to all the above reaction to become fully completed.
I'm wondering whether its possible to get a contact angle higher than 108 that I have now. Please let me know what changes should I made? (any pre-treatment of glass before silanizing, any other solutions, etc.)