News Column

Researchers at University of Bremen Have Reported New Data on Nanoparticles

June 27, 2014

By a News Reporter-Staff News Editor at Science Letter -- Fresh data on Nanoparticles are presented in a new report. According to news reporting originating from Bremen, Germany, by NewsRx correspondents, research stated, "A general approach for the linking of Pt nanoparticles (NPs) with bifunctional amine ligands (organic molecules with two amine groups) is presented that allows for the preparation of NP catalysts without inorganic supports and high densities of the catalytically active metal. Advantage was taken of the use of 'unprotected' NPs, which enables us to prepare different ligand-functionalized NPs from the same particle batch and thus to relate changes of the resulting material properties exclusively to the influence of the ligand."

Our news editors obtained a quote from the research from the University of Bremen, "Three bifunctional ligands with similar functional groups (amines) but different hydrocarbon skeletons were used and compared to monofunctional ligands of similar molecular structures (alkyl and aryl amines) showing significantly different material properties. Monofunctional molecules with minor steric demand cover almost completely the NP surface and lead to two-dimensional assembling of the NPs. In contrast, the use of bifunctional amine ligands leads to the formation of porous, three-dimensional NP networks (ligand-linked NPs) with a high density of ligand free surface atoms, thus enabling for the application as catalytic materials."

According to the news editors, the research concluded: "The stabilizing effect of bifunctional ligands serves as an alternative to the use of inorganic support materials and enables for catalytic applications of ligand-linked NP networks."

For more information on this research see: Stabilizing Catalytically Active Nanoparticles by Ligand Linking: Toward Three-Dimensional Networks with High Catalytic Surface Area. Langmuir, 2014;30(19):5564-5573. Langmuir can be contacted at: Amer Chemical Soc, 1155 16TH St, NW, Washington, DC 20036, USA. (American Chemical Society -; Langmuir -

The news editors report that additional information may be obtained by contacting E. Morsbach, University of Bremen, IMSAS Inst Microsensors Actuators & Syst, D-28359 Bremen, Germany. Additional authors for this research include J. Speder, M. Arenz, E. Brauns, W. Lang, S. Kunz and M. Baumer (see also Nanoparticles).

Keywords for this news article include: Bremen, Europe, Germany, Nanotechnology, Emerging Technologies

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Source: Science Letter

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