Christian Zeitz

Christian Zeitz
TNG Technology Consulting GmbH

PhD, Dipl.-Phys.

About

7
Publications
1,344
Reads
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146
Citations
Citations since 2016
2 Research Items
106 Citations
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Introduction
I have finished my PhD thesis. It is about Hydroxyapatite samples that can serve as a controlled substitute for natural hard tissues like bones or teeth. Observing the interaction between HAP and proteins, bacteria or cells is often a complicated task when using natural tissues. The latter often show poorly controllable properties like a complex chemical composition or a difficult internal structure. My work was therefore to create a controlled model sample of lower complexity.
Additional affiliations
April 2008 - present
Universität des Saarlandes
Position
  • PhD Thesis - Properties of Hydroxyapatite and creation of a synthtic and dense model sample
March 2008 - December 2014
Universität des Saarlandes
Position
  • PhD Student

Publications

Publications (7)
Article
Fluoridation of enamel is believed to provide an effective tool to protect teeth from caries, but there is still little information on the timescale of fluoride uptake. In this study highly compressed pellets of hydroxyapatite are used as first-order model systems to approximate the mineral component of natural enamel for investigations on the time...
Article
Hydroxyapatite substrates are common biomaterials, yet samples of natural teeth do not meet the demands for well-defined, highly reproducible properties. Pellets of hydroxyapatite were produced via the Field Assisted Sintering Technology (FAST) as well as via pressureless sintering (PLS). The applied synthesis routes provide samples of very high de...
Article
The mechanisms of action of fluoride have been discussed controversially for decades. The cavity-preventive effect is often traced back to effects on demineralization. However, an effect on bacterial adhesion was indicated by indirect macroscopic studies. To characterize adhesion on fluoridated samples on a single bacterial level, we used AFM force...
Article
Full-text available
The epitaxial growth of graphene on the surface of an Ir/YSZ/Si(111) multilayer substrate via the deposition of a liquid carbon precursor (acetone) was investigated by x-ray photoelectron spectroscopy, x-ray photoelectron diffraction, low-energy electron diffraction (LEED), and Fermi surface mapping. It is shown that the onset of graphene formation...
Article
The epitaxial growth of graphene on the surface of an Ir/YSZ/Si(111) multilayer substrate via the deposition of a liquid carbon precursor (acetone) was investigated by x-ray photoelectron spectroscopy, x-ray photoelectron diffraction, low-energy electron diffraction (LEED), and Fermi surface mapping. It is shown that the onset of graphene formation...
Article
Structural and chemical changes that arise from fluoridation of hydroxyapatite (Ca(5)(PO(4))(3)OH or "HAp"), as representing the synthetic counterpart of tooth enamel, are investigated by X-ray photoelectron spectroscopy (XPS). Elemental depth profiles with a depth resolution on the nanometer scale were determined to reveal the effect of fluoridati...
Article
Full-text available
Structural and chemical changes that arise from a fluoridation of synthetic hydroxyapatite in neutral and acidic fluoridation agents are investigated. For synthetic hydroxyapatite (Ca5(PO4)3OH = HAp), the elemental depth profiles were determined by X-ray photoelectron spectroscopy (XPS) to reveal the effect of fluoridation in nearly neutral (pH = 6...

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