Prof. Dr. Klaus Rademann

Profil

Zusammenfassung

Klaus Rademann erforscht die Synthese und Charakterisierung von Nanopartikeln und Clustern – insbesondere aus Edelmetallen wie Gold und Silber – sowie deren Bildungsmechanismen in verschiedenen Matrices. Seine Expertise umfasst die zeitaufgelöste Verfolgung von Nukleations- und Wachstumsprozessen sowie die katalytischen und optischen Eigenschaften dieser Nanomaterialien. Diese Kompetenzen sind für die Entwicklung von Nanomaterialien mit gezielt eingestellten Eigenschaften und deren Anwendung in Katalyse, Sensorik und Materialwissenschaften relevant.

Skills

Name

Prof. Dr. Klaus Rademann

Titel

Prof. Dr.

Fakultät

Mathematisch-Naturwissenschaftliche Fakultät

Institut

Institut für Chemie

E-Mail

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HU-FIS-Profil

Quelle ↗

Zuletzt gescrapt

27.6.2026, 01:12:32

• 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

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

  2010

  Chemistry of Materials · 592 Zitationen · 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 (Cu3(BTC)2, BTC = 1,3,5-benzenetricarboxylate) and MOF-14 (Cu3(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 m2/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 · 434 Zitationen · 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.

• Nucleation and Growth of Gold Nanoparticles Studied <i>via</i> <i>in situ</i> Small Angle X-ray Scattering at Millisecond Time Resolution

  2010

  ACS Nano · 394 Zitationen · DOI

  Gold nanoparticles (AuNP) were prepared by the homogeneous mixing of continuous flows of an aqueous tetrachloroauric acid solution and a sodium borohydride solution applying a microstructured static mixer. The online characterization and screening of this fast process ( approximately 2 s) was enabled by coupling a micromixer operating in continuous-flow mode with a conventional in-house small angle X-ray scattering (SAXS) setup. This online characterization technique enables the time-resolved investigation of the growth process of the nanoparticles from an average radius of ca. 0.8 nm to about 2 nm. To the best of our knowledge, this is the first demonstration of a continuous-flow SAXS setup for time-resolved studies of nanoparticle formation mechanisms that does not require the use of synchrotron facilities. In combination with X-ray absorption near edge structure microscopy, scanning electron microscopy, and UV-vis spectroscopy the obtained data allow the deduction of a two-step mechanism of gold nanoparticle formation. The first step is a rapid conversion of the ionic gold precursor into metallic gold nuclei, followed by particle growth via coalescence of smaller entities. Consequently it could be shown that the studied synthesis serves as a model system for growth driven only by coalescence processes.

• 3dk.berlin BERNHARDT Kunststoffverarbeitungs GmbH

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

  company

• Krebs Engineers GmbH

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

  company

• Madurai Kamaraj Universität

  PPP Indien DST 2017, Projektbezogener Personenaustausch

  university