Create successful ePaper yourself
Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.
Borides as versatile materials<br />
Kathrin Hofmann/group of Professor Dr. B. Albert<br />
Frederick Stober, Kathrin Hofmann, Barbara Albert, Gerd Bruhn, Carmen Werdermann, Michael Frotscher, Steffi Rades,<br />
Dorothee Nikolaus, Helmut Schneider, Roland Hord, Hildegard Wolf, Natalia Sennova, Rita Klemens<br />
(not shown: Gerhard <strong>Co</strong>rdier, Arno Knappschneider, Murat Gürsoy, Mehmet Kayhan, Manikandu Prabu, Sebastian<br />
Klemenz, Carina Martschinke, Eva-Maria Felix)<br />
Former co-workers: Konny Schmitt, Wilhelm Klein, Monalisa Panda, Denis Fofanov, Christine Kapfenberger, Vinmathi<br />
Vanitha, Lee Reilly, Markus Pompetzki, Natalia Kondratenko, Kathrin Bratz
Solid state chemistry<br />
in the group of Professor Dr. Barbara Albert<br />
Borides, Carbaborides and Boride carbides<br />
hard materials, thermoelectrics,<br />
superconductors<br />
Borates<br />
ionic conductivity, NLO<br />
Zintl-phases<br />
Al 2Sb 6 12- in Ba3AlSb 3<br />
thermoelectrics<br />
Borides at the <strong>nano</strong>-scale<br />
magnetic and<br />
catalytic properties<br />
Cuprates<br />
superconductivity<br />
Molecular boron<br />
clusters<br />
model compounds, theory<br />
As well as: pigments, phosphors, zeolithes…
Borides – as small particles<br />
NaBH 4<br />
LiBH 4<br />
Synthesis<br />
H 2O<br />
THF<br />
diglyme<br />
diethyleneglycoledibutylether<br />
(amorphous) precipitate<br />
FeSO 4<br />
FeBr 2<br />
FeCl 2<br />
Fe(acac) 3<br />
FeBr 3 Fe(acac)2<br />
C. Kapfenberger, K. Hofmann, B. Albert, Solid State Sci. (2003), 5, 925; S. Rades, PhD thesis in preparation<br />
FeCl 3
<strong>nano</strong>-Borides of Fe and Ni<br />
D. Fofanov, Ph. D. thesis, Universität Hamburg, 2006; S. Rades diploma thesis, Universität Hamburg, 2005
XANES and EXAFS<br />
XANES (left) and reduced EXAFS (middle) signal of precipitate annealed at 450°C<br />
(blue), compared with crystalline FeB (red), k3 fit of experimental data based on<br />
FeB structure (right)<br />
(S 02 free, Nj fix., Rj fix., 2 constr.+ave, E0-Shift corr. R = 11, 24 < 49 n(idp), fit range 1.2 – 6.8 Å, 98 paths)<br />
S. Rades, Ph. D. thesis in preparation, TU Darmstadt<br />
chi(k)<br />
3 5 7 9 11 13 15<br />
k [1/Angström]<br />
K-range [Å -1 ] 2.5-15<br />
Window function Bessel, beta 4<br />
Fit range [Å] 0.9-6.7<br />
Free running parameters
Electron microscopy<br />
NaBH 4<br />
LiBH 4<br />
FeB<br />
with Stephan Kraemer, UCSB Nanocentre<br />
4 nm 7 nm<br />
FeSO 4<br />
FeBr 2<br />
7 nm<br />
FeCl 2<br />
Fe(acac) 3<br />
FeBr 3 Fe(acac)2<br />
3 nm 20 nm
Superparamagnetism of <strong>nano</strong>scale FeB<br />
with Ram Seshadri, MRL - UCSB
Catalysis: <strong>nano</strong>-<strong>Co</strong> 2B (1)<br />
with M. Steffan, P. Claus, Darmstadt
Change language