Hi everyone! I'm doing some research on spin coating, my precursor is TiCl4 and I mix it with ethanol, but I have cracks on my films, can anyone help me? The reaction is: Ticl4+ ethanol ---> TiO2 + HCl +.... What effects does the pH and the type of alcohol used have? How can I change the viscosity ? Can anyone tell me what happens chemically in this reaction?