Prof. Dr. Klaus Rademann

Die Forschung konzentriert sich auf die Synthese und Charakterisierung von Nanomaterialien, insbesondere metallischen Clustern und Übergangsmetalloxiden, sowie deren Anwendung in der Thermoelektrik und Photonik. Zentrale Methoden umfassen verschiedene spektroskopische Techniken, Kristallographie und analytische Chemie zur Untersuchung von Struktur-Eigenschafts-Beziehungen. Weitere Schwerpunkte liegen auf der Entwicklung von Katalysatoren, Halbleiterstrukturen und der Oberflächenchemie unter extremen Bedingungen.

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• Advanced Chemistry Teaching, ISAP HU University, intern. Studien- und Ausbildungspartnerschaft

  Quelle ↗

  Förderer: DAAD Zeitraum: 09/2017 - 12/2019 Projektleitung: Prof. Dr. Klaus Rademann

• Entwicklung magnetisch leitfähiger Elastomere mit 3D-Druck für induktive Übertrager mit Anwendungsentwicklung

  Quelle ↗

  Förderer: BMWE: ZIM Zeitraum: 07/2018 - 06/2020 Projektleitung: Prof. Dr. Klaus Rademann, Prof. Dr. Nicola Pinna

• EXIST CreativeQuantum

  Quelle ↗

  Förderer: Bundesministerium für Forschung, Technologie und Raumfahrt Zeitraum: 03/2010 - 02/2011 Projektleitung: Prof. Dr. Klaus Rademann

• Mechanochemical Synthesis of Metal−Organic Frameworks: A Fast and Facile Approach toward Quantitative Yields and High Specific Surface Areas

  2010

  Chemistry of Materials · DOI

  The strategy of utilizing mechanochemical synthesis to obtain metal−organic frameworks (MOFs) with high surface areas is demonstrated for two model systems. The compounds HKUST-1 (Cu 3 (BTC) 2, BTC = 1,3,5-benzenetricarboxylate) and MOF-14 (Cu 3 (BTB) 2, BTB = 4,4′,4′′-benzenetribenzoate) were synthesized by ball milling and characterized by powder X-ray diffraction (XRD), Raman spectroscopy, scanning electron microscopy (SEM) and thermal analysis (DTA/DTG/MS). The specific surface area (SSA) of both compounds was characterized by nitrogen adsorption. To verify these results and to understand how the synthetic conditions influence the pore structure and the surface area, additional small-angle X-ray scattering (SAXS) experiments were carried out. Our investigations confirm that this synthesis approach is a promising alternative method for distinct MOFs. This facile method leads to materials with surface areas of 1713 m 2 /g, which is comparable to the highest given values in the literature for the respective compounds.

• Turkevich in New Robes: Key Questions Answered for the Most Common Gold Nanoparticle Synthesis

  2015

  ACS Nano · DOI

  This contribution provides a comprehensive mechanistic picture of the gold nanoparticle synthesis by citrate reduction of HAuCl4, known as Turkevich method, by addressing five key questions. The synthesis leads to monodisperse final particles as a result of a seed-mediated growth mechanism. In the initial phase of the synthesis, seed particles are formed onto which the residual gold is distributed during the course of reaction. It is shown that this mechanism is a fortunate coincidence created by a favorable interplay of several chemical and physicochemical processes which initiate but also terminate the formation of seed particles and prevent the formation of further particles at later stages of reaction. Since no further particles are formed after seed particle formation, the number of seeds defines the final total particle number and therefore the final size. The gained understanding allows illustrating the influence of reaction conditions on the growth process and thus the final size distribution.