Influence of the deposition parameters on the characteristics of aerosol-gel deposited thin films

Langlet, M.; Vautey, C.

doi:10.1007/bf02436864

Cited by 4 publications

(2 citation statements)

References 3 publications

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“…The amount of the various components and the method of mixing (vortex or sonication), were varied in a univariate manner to find the optimal formulation as observed by optical spectroscopy (see “ Procedure for selection of sol-gel formulation for capillary coating ” section). Observation of sol–gel coating by optical microscopy was previously employed to study uniformity of sol–gel deposition on silicon substrate 35 , 36 . Summary of the results are described below.…”

Section: Resultsmentioning

confidence: 99%

Silica nanolayer coated capillary by hydrothermal sol–gel process for amines separation and detection of tyramine in food products

Obma

Hemwech

Phoolpho

et al. 2022

Sci Rep

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A hydrothermal sol–gel method for reproducible formation of silica nanolayer on the wall of silica capillaries was developed for electrochromatography. The formulation was optimized by observation of uniform gel formation on an optical microscope. The variables of the formulation include types of solvent, water-TEOS ratio, CTAB and urea contents, and mixing method. The procedure produced a coating of silica ca. 100 nm thick layer on the wall of the capillary. Surface morphology of the coating was characterized by SEM, contact angle and chemical composition by FT-IR spectroscopy and X-ray powder diffraction. The coating reduced the electroosmotic mobility producing enhanced separation performance. Eight standard amines (including tyramine and benzhydrylamine, as an internal standard) were separated with peak resolution Rs ≥ 2 for all adjacent peaks and plate number N ≥ 3.0 × 104 m-1. Calibration was linear from 5 to 200 µg L-1, with r2 > 0.9985 and instrumental LOD of 4.9 μg L-1. Five samples of food products were diluted and analyzed for the amines using the coated capillary and only tyramine was detected. Intra-day and inter-day precisions were less than 1.2%RSD. Percent recoveries of spiked tyramine in samples were 95 ± 3 to 106 ± 7% (n = 3).

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Section: Resultsmentioning

confidence: 99%

Silica nanolayer coated capillary by hydrothermal sol–gel process for amines separation and detection of tyramine in food products

Obma

Hemwech

Phoolpho

et al. 2022

Sci Rep

View full text Add to dashboard Cite

show abstract

“…10 SiO 2 films made from the sol-gel method are thought to be generally porous. According to Langlet and co-workers, 11 some experimental conditions led to undesirable morphology features such as too rough a surface or local thickness inhomogeneities. Those inhomogeneities such as dotted films would also occur during our sample preparations and affect the thickness measurement by a NANOSPEC.…”

Section: Methodsmentioning

confidence: 99%