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Control of functionalization of supports for subsequent assembly of t itania nanoparticle films
Author(s) -
Rades Steffi,
Borghetti Patrizia,
Ortel Erik,
Wirth Thomas,
Blanco Miren,
Gómez Estíbaliz,
Martinez Amaia,
Jupille Jacques,
Martra Gianmario,
Hodoroaba VasileDan
Publication year - 2018
Publication title -
surface and interface analysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.52
H-Index - 90
eISSN - 1096-9918
pISSN - 0142-2421
DOI - 10.1002/sia.6398
Subject(s) - surface modification , x ray photoelectron spectroscopy , materials science , tin oxide , secondary ion mass spectrometry , substrate (aquarium) , chemical engineering , auger electron spectroscopy , layer (electronics) , alloy , nanoparticle , oxide , titanium , nanotechnology , composite material , chemistry , ion , organic chemistry , metallurgy , oceanography , physics , nuclear physics , engineering , geology
For self‐assembling of TiO 2 nanoparticles in multiple layers by layer‐by‐layer deposition to be applied to TiO 2 thin films with defined and homogeneous thickness for large‐scale applications, the proper functionalization of substrate surface is a prerequisite to guarantee sufficient adhesion. The substrates selected and tested in the present paper were conductive, fluorine‐doped tin oxide (FTO) glass, nonconductive silica glass, and titanium alloy. The current study focusses on the analytical control of the stepwise functionalization of the substrates with 3‐aminopropyltriethoxysilane and glutaraldehyde (GA) for both the FTO glass and silica glass and with 3‐aminepropyl phosphonic acid and GA for Ti alloy. The analyses have been conducted by means of surface sensitive methods, X‐ray photoelectron spectroscopy, Auger electron spectroscopy, and time‐of‐flight secondary ions mass spectrometry. Chemical composition of surface of functionalized substrates shows differences in the degree and type of modification in dependence on substrate. It could be demonstrated that the best functionalized substrates were the conductive FTO glasses. The analysis of the functionalized Ti substrates has revealed that the surface coverage with 3‐aminepropyl phosphonic acid and GA molecules is an inhomogeneous one, and further optimization of the two‐step functionalization on the Ti alloy substrate is necessary.