41 research outputs found
Synthesis of iron oxide nanoparticles by decomposition of iron-oleate: influence of the heating rate on the particle size
Reduced thermal expansion by surface-mounted nanoparticles in a pillared-layered metal-organic framework
Control of thermal expansion (TE) is important to improve material longevity in applications with repeated temperature changes or fluctuations. The TE behavior of metal-organic frameworks (MOFs) is increasingly well understood, while the impact of surface-mounted nanoparticles (NPs) on the TE properties of MOFs remains unexplored despite large promises of NP@MOF composites in catalysis and adsorbate diffusion control. Here we study the influence of surface-mounted platinum nanoparticles on the TE properties of Pt@MOF (Pt@Zn2(DP-bdc)2dabco; DP-bdc2-=2,5-dipropoxy-1,4-benzenedicarboxylate, dabco=1,4-diazabicyclo[2.2.2]octane). We show that TE is largely retained at low platinum loadings, while high loading results in significantly reduced TE at higher temperatures compared to the pure MOF. These findings support the chemical intuition that surface-mounted particles restrict deformation of the MOF support and suggest that composite materials exhibit superior TE properties thereby excluding thermal stress as limiting factor for their potential application in temperature swing processes or catalysis
Phase composition and magnetic properties of post-annealed asymmetric Pt/Fe/Pt/Au/Fe thin films
Präparation von Eisenoxid-, Manganoxid- und Kompositnanopartikeln und deren mikroskopische Charakterisierung
Influence of synthesis parameters on size, shape, composition and magnetic properties of transition metal oxide nanoparticles
Structural investigations on differently sized monodisperse iron oxide nanoparticles synthesized by remineralization of apoferritin molecules
Single crystals of metal-organic framework Ulm-4 grown selectively on a micro-structured plasma polymer coating
Selective growth of MFU-4l single crystals on microstructured plasma polymer coatings
Crystals of the metal–organic framework Ulm-4l(arge) grow site selectively and with 〈1 0 0〉 orientation on microtextured plasma polymer coatings.</p