Publicaties
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Investigation of Crystallization Processes from Hafnium Silicate Powders Prepared from an Oxychloride Sol-Gel KU Leuven
Hafnium oxide and silicate materials are now incorporated into working CMOS devices; however, the crystallization mechanism is still poorly understood. In particular, addition of SiO2 to HfO2 has been shown to increase the crystallization temperature of HfO2, hence, allowing it to remain amorphous under current processing conditions. Building on earlier study, we herein, investigate bulk HfxSi1-xO2 samples to determine the effect of SiO2 on the ...
CeOU+2082 buffer layers for HTSC via an aqueous sol-gel method : chemistry and microstructure Universiteit Gent
Sol-gel syntheses of photocatalysts for the removal of pharmaceutical products in water Universiteit Gent
A screening study on seven photocatalysts was performed to identify the best candidate for pharmaceutical products degradation in water. Photocatalysts were deposited as thin films through a sol-gel process and subsequent dip-coating on glass slides. The efficiency of each photocatalyst was assessed through the degradation of methylene blue first, and then, through the degradation of 15 different pharmaceutical products. Two main types of ...
Sol-gel (combustion) synthesis and characterization of different alkaline earth metal (Ca, Sr, Ba) stannates Universiteit Hasselt
In this study, monophasic strontium and barium stannate (SrSnO3, Sr2SnO4, BaSnO3, Ba2SnO4) powders were synthesized by means of environmentally friendly aqueous sol-gel technique under neutral conditions. However, it was established that the successful sol-gel synthesis of appropriate calcium stannates (CaSnO3 and Ca2SnO4) can be performed only at acidic sol-gel processing conditions. Moreover, the influence of nature of alkaline earth metal ...
Sol-gel synthesis, phase composition, morphological and structural characterization of Ca-10(PO4)(6)(OH)(2): XRD, FTIR, SEM, 3D SEM and solid-state NMR studies Universiteit Hasselt
Aqueous sol-gel chemistry route based on ammonium hydrogen phosphate as the phosphorus precursor, calcium acetate monohydrate as source of calcium ions, and 1,2-ethylendiaminetetraacetic acid (EDTA), or 1,2-diaminocyclohexanetetracetic acid (DCTA), or tartaric acid (TA), or ethylene glycol (EG), or glycerol (GL) as complexing agents have been used to prepare calcium hydroxyapatite (Ca-10(PO4)(6)(OH)(2), CHAp). The phase transformations, ...
Capacitance spectroscopy of alumina sol-gel capacitors with Al top contacts Universiteit Gent
We measured the complex capacitance C(f) of ITO/sol-gel alumina/Al capacitors deposited on glass (and some on stainless steel foil) in the frequency range 15 Hz-10 MHz. The sol-gel films were deposited by dip-coating and following a two-step process. The capacitance C(f) found was much higher than that of a pure Al2O3-film due to the remaining porosity of the film and the uptake of H2O from the environment. The C(f) curves are useful as a ...
An ambient temperature aqueous sol-gel processing of efficient nanocrystalline doped TiO2-based photocatalysts for the degradation of organic pollutants Universiteit Gent
Analytical TEM study of CVD diamond growth on TiO2 sol-gel layers Universiteit Hasselt KU Leuven Universiteit Antwerpen
The early growth stages of chemical vapor deposition(CVD) diamond on a sol-gel TiO2 with buried ultra dispersed diamond seeds(UDD)have been studied. In order to investigate the diamond growth mechanism and understand the role of the TiO2 layer in the growth process, high resolution transmission electron microscopy(HRTEM), energy-filtered TEM and electron energy loss spectroscopy(EELS)techniques were applied to cross sectionaldiamond film ...