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ABSTRACT: Taking advantage of the condensation between
SiOH of the hydroxylated octadecyltrichlorosilane (OTS)
and COH on graphene oxide (GO) surface, we grafted OTS
onto the GO-based dual-layer film, which was composed of GO
outerlayer and (3-aminopropyl)triethoxysilane (APTES) selfassembled
underlayer, on a Si substrate. Thus, a hydrophobic
trilayer film coded as APTES-GO-OTS was prepared successfully.
To confirm the chemical composition, structure, and
morphology of the trilayer film, various means including water
contact angle measurement, attenuated total reflectance Fourier
transform infrared (ATR-FTIR) spectrometry, X-ray photoelectron spectroscopy (XPS), and atomic force microscopy (AFM) were
performed. Moreover, to investigate the tribological performances, the micro- and macrotribological experiments were conducted
with AFM and a UMT tribometer. The results showed that the as-prepared trilayer film exhibited low adhesion and greatly reduced
the friction force in both the micro- and macroscale. Therefore, such a trilayer film is suitable for an application in the lubrication and
protection of nano/microelectromechanical systems (NEMS/MEMS).
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