Determination of the Molar Decadic Absorptivities of the Stretching Vibrations of the Hydride and Phenyl Groups on Aerosil� 300

Heger, K.; Marx, G.

doi:10.1007/s006040070091

Cited by 6 publications

(5 citation statements)

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“…A spectrum of the high dispersed silica Aerosil 300 is inserted for comparison in Fig. 3 [22]. The stretching band around 1100 cm -1 and the bending bands between 800 cm -1 and 400 cm -1 are typical for amorphous as well as crystalline silica and confirm the preponderance of SiO 4 tetrahedrons in the structure.…”

Section: Resultsmentioning

confidence: 94%

A new attempt to study biomineralised silica bodies in Dactylis glomerata L.

Dietrich

Hemeltjen

Meyer

et al. 2002

Analytical and Bioanalytical Chemistry

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The accumulation process of inorganic compounds in animals and plants by biomineralisation is not well understood nowadays, though it may be the key to an environmental-compatible production of modern materials in future. In this paper a new attempt will be made on the investigation of silica accumulation in grasses (especially Dactylis glomerata L.). The silicic acid agglomerates in Dactylis glomerata L. were studied by means of scanning electron microscopy in combination with energy dispersive X-ray spectrometry as well as infrared and micro-RAMAN spectrometry.In particular blades were prepared by critical point drying or shock-freezing for anatomical studies of silica cells and bristles in the plant tissue. SEM imaging and EDX microanalysis for elemental composition were done in the cryostage as well as under variable pressure. The localized silica bodies were examined for their structural properties by means of IR and micro RAMAN spectroscopy. The results are comparable to SiO(2) polytypes such as high disperse silica and opal.

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Section: Resultsmentioning

confidence: 94%

A new attempt to study biomineralised silica bodies in Dactylis glomerata L.

Dietrich

Hemeltjen

Meyer

et al. 2002

Analytical and Bioanalytical Chemistry

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“…AFM-Untersuchungen zeigten, dass durch eine chemische Modifizierung [3] der Substrat-Oberflächen die Haftkraft zwischen Substrat und AFM-Spitze unter Normalbedingungen auf der gesamten Oberfläche nahezu gleichmäûig reduziert werden kann. Dabei entstehen keine Inseln, die den Abstand der Haftpartner und die Oberflächenrauigkeit erhöhen könnten.…”

Section: Abbildungunclassified

Haftkraftmessungen an modifizierten Oberflächen – Eine AFM‐Anwendung

Hoffmann

Kubier²,

Husemann

2003

Chemie Ingenieur Technik

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“…However, identical modifications were carried out using highly disperse silica Aerosil® 300 (Degussa AG, Frankfurt/Main, Germany) with an average particle size of 7 nm and a specific surface area of 300 ±30 m 2 g-1 as previously described [20,21]. This modified silica can be characterised by, e.g., transmission infrared spectroscopy.…”

Section: Surface Properties Modified By Gaseousmentioning

confidence: 99%

“…Force-distance curves were recorded with AFM in force volume mode using original as well as specially oxidised AFM tips. By chemical modification of the surface (substitution of silanol groups by hydride or phenyl groups [20,21]), it is possible to reduce the adhesion force between substrate and AFM tip to almost the same degree over the whole surface. AFM images prove that in this case, no additional roughness arises due to the treatment of the solid surface.…”

Section: Surface Energymentioning

confidence: 99%