Surface texture modification of spin-coated SiO2 xerogel thin films by TMCS silylation

Abstract

The SiO 2 xerogel thin films were deposited successfully by sol-gel technique via the acid-catalyzed hydrolysis and condensation of tetraethylorthosilicate (TEOS) with ethanol as a solvent. Further, the deposited thin films were treated wet chemically by trimethylchlorosilane (TMCS) and hexane solution with 10% and 15% volume ratio to remove the hydroxyl groups from the surface of deposited SiO 2 thin films. These as deposited and surfacemodified films were characterized by ellipsometer, Fourier transform infrared (FTIR) spectrometer and contact angle meter. The presence of 2900 and 850 cm −1 peaks of CH 3 vibrations in FTIR spectra of surface-modified films confirms the hydrphobisation of SiO 2 surface. The maximum contact angle of 108•7 • was observed for the surface-modified film at 10% TMCS.

Manufacturing textured surfaces: State of art and recent developments

“…This process has already been used for tribological, 79,80 optical, 81,82 and surface energy applications. 83,84 As example, Zou et al 79 used spin coating to create nano-textured substrate by depositing colloidal silica nanoparticles on a flat silicon wafer. The nano-textured substrates disclosed improved tribological properties after the texturing treatment (friction coefficient reduced with 88% in comparison with a silicon oxide-coated substrate).…”

“…This process has already been used for tribological, 79,80 optical, 81,82 and surface energy applications. 83,84 As example, Zou et al. 79 used spin coating to create nano-textured substrate by depositing colloidal silica nanoparticles on a flat silicon wafer.…”

“…Ultrasonic nanocrystal surface modification (b). 83 Reprinted from Amanov et al., 97 with permission from Elsevier.…”

Synthesis and Gas Transport Properties of Poly(2,6-dimethyl-1,4-phenylene oxide)–Silica Nanocomposite Membranes

“…Furthermore, the peak around 793–798 cm −1 corresponds to the Si–O–Si of the bending mode [52,53], while the band at 955 cm −1 can be assigned to Si-O lattice vibrations [54]. Unlike the commercial SiO 2 , the FTIR spectra of the synthesized silica powders, in particular GPM/EtOH, show one extra peak at 1259 cm −1 , which corresponds to the symmetric deformation vibration of C–H bonds, which in turn represents the attachment of methyl groups to the Si atom [55]. Therefore, both 29 Si NMR and FTIR qualitatively confirm the formation of silica by the emulsion polymerization of TEOS in pure TCE.…”

Scratch resistance enhancement of 3-glycidyloxypropyltrimethoxysilane coating incorporated with silver nanoparticles

“…4 for sample 8B shows the complete bonding interaction of GLYMO with glass substrate and the existence of Si-OH band in 10B sample shows that there is excess of GLYMO which never interacted with glass substrate. 25,26 Contact angle measurement GLYMO/silver nanoparticles coated glass substrate and GLYMO coated glass substrate showed a higher contact angle measurement than non-coated glass substrate as illustrated in Fig. 4.…”