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Fourier transform infrared spectroscopy

About: Fourier transform infrared spectroscopy is a research topic. Over the lifetime, 48250 publications have been published within this topic receiving 1134369 citations.


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Journal ArticleDOI
10 Nov 2004-Langmuir
TL;DR: A method for engineering the surface chemistry and pore dimensions in porous Si films for the purpose of controlling the loading and release of a hydrophobic drug is described and the steroid dexamethasone molecule is found to infiltrate the freshly etched samples but does not enter the chemically modified films.
Abstract: A method for engineering the surface chemistry and pore dimensions in porous Si films for the purpose of controlling the loading and release of a hydrophobic drug is described. Loading of the steroid dexamethasone is confirmed by Fourier transform infrared spectroscopy, and the release rates are characterized by observation of the appearance of the drug in solution (UV−vis absorption spectroscopy) and by measurement of the Fabry-Perot fringes in the optical reflectivity spectrum of the porous Si film. Optical reflectivity changes provide a measure of the release rate of the drug that is amenable to in-vivo diagnostic applications. Fresh porous Si films are prepared by electrochemical etch and subsequently modified by hydrosilylation with 1-dodecene. The dodecene-modified samples are more robust in aqueous environments and exhibit slower release rates of the drug relative to freshly etched porous Si. Whereas the relatively large dexamethasone molecule is found to infiltrate the freshly etched samples, it d...

162 citations

Journal ArticleDOI
TL;DR: This review of some relatively recent FTIR spectroscopic studies of the structure and organization primarily of fully hydrated phospholipids in their biologically relevant lamellar crystalline, gel and liquid-crystalline phases shows that interconversions between these bilayer phases can be accurately monitored by this technique.

162 citations

Journal ArticleDOI
TL;DR: In this paper, primary amine groups are anchored onto ordered mesoporous carbon in a one-step reaction, resulting in hexagonally ordered carbon materials with functional groups residing at the pore surface.
Abstract: This paper describes a single step procedure by which primary amine groups are anchored onto ordered mesoporous carbon in a one step reaction. Ordered carbon materials with functional groups residing at the pore surface are prepared using SBA-15 silica as template in combination with hydrothermal carbonisation at mild temperatures (180 °C). These functional groups are afterwards reacted with 3-chloropropylamine leading to amino-modified hexagonally ordered carbons. Transmission electron microscopy (TEM) and small angle X-ray scattering (SAXS) experiments proved that the resulting carbon materials exhibit hexagonal frameworks. Nitrogen adsorption revealed that the materials are micropore free, possessing narrow mesopores size distributions and high surface areas. The surface functionality and hydrophilicity of the carbonaceous materials were assessed by Fourier transform IR spectroscopy (FTIR), X-ray photoelectron analysis (XPS) and water porosimetry. The presence of accessible amino groups in considerable amounts was proved by elemental microanalysis, FTIR spectroscopy and thermogravimetrical analysis.

162 citations

Journal ArticleDOI
TL;DR: In this paper, LDH-biochar composites were synthesized in different molar ratios of Mg:Al (2:1, 3:1 and 4:1) using co-precipitation method.

162 citations

Journal ArticleDOI
TL;DR: In situ polymerization method is employed to prepare sepiolite/polyurethane nanocomposite as discussed by the authors, which has been characterized by X-ray diffraction, scanning electron microscope, transmission electron microscope and Fourier transform infrared spectroscopy.
Abstract: In situ polymerization method is employed to prepare sepiolite/polyurethane nanocomposite. The morphology and the dispersion of sepiolite in polyurethane have been characterized by X-ray diffraction, scanning electron microscope, transmission electron microscope and Fourier transform infrared spectroscopy. The results show the sepiolite is dispersed homogeneously in the polyurethane matrix at a nanometer scale. The tensile test shows that the tensile strength and elongation at break for the nanocomposites increase with the addition of sepiolite as compared to those of the pure polyurethane. The TGA analysis reveals that the addition of nanofillers results in the higher thermal stability.

162 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
20236,741
202213,616
20212,802
20202,689
20192,808
20183,180