Study on micro friction and adhesion force of OTS self-assembled film (I)

The friction and adhesion characteristics of the self-assembled film of oct adecyltrime-thoxysilane (OTE SAM) on the surface of SiO2 under the relative humidity of 5 % - 99 % were studied using atomic force microscopy/friction force microscopy(AFM/FFM). Experimental results indicate that OTE SAM can not only improve the tribological properties of SiO2 surface, but also show well anti-wear properties under the pressure of the load of 200 nN, or Her tz pressure of 0.8 GPa. Due to the strong hydrophilicity, the friction forc e between the FFM tipe and SiO2 surface increases with the relative humidit y when it is lower than 50 % HR and then decreases sharply. However, due to the well hydrophobe property of OTE SAM, the friction force between FFM ti pe and the surface of OTE SAM is much lower than that of the FFM/SiO2 surfa ce and slightly decrease with relative humidity. Therefore, OTE SAM will be a good boundary lubricant of high speed recording system.