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@ARTICLE{Dashjav:818231,
author = {Dashjav, E. and Lipińska-Chwałek, M. and Grüner, D. and
Mauer, G. and Luysberg, M. and Tietz, F.},
title = {{A}tomic layer deposition and high-resolution electron
microscopy characterization of nickel nanoparticles for
catalyst applications},
journal = {Surface and coatings technology},
volume = {307},
issn = {0257-8972},
address = {Amsterdam [u.a.]},
publisher = {Elsevier Science},
reportid = {FZJ-2016-04714},
pages = {428-435},
year = {2016},
abstract = {Ni nanoparticles (diameter < 10 nm) are deposited on Si and
ceramic substrates of porous lanthanum-substituted strontium
titanate/yttrium-stabilized zirconia (LST/YSZ) composites by
a two-step process. First, NiO films are produced by atomic
layer deposition at 200 °C using
bis(methylcyclopentadienyl)nickel(II) (Ni(MeCp)2) and H2O as
precursors. In the second step, the NiO films are reduced in
H2 atmosphere at 400–800 °C. The size of the resulting Ni
nanoparticles is controlled by the temperature. The largest
particles with a diameter of about 7 nm are obtained at 800
°C. NiO film and Ni nanoparticles deposited on Si
substrates are characterized by high-resolution electron
microscopy. It was found that the Ni(MeCp)2 precursor reacts
with the substrate, leading to the formation of NiSi2
precipitates beneath the surface of the Si wafer and
amorphization of the surrounding area, resulting in a 10 nm
thick top layer of the Si wafer. After reductive annealing,
NiSi2 precipitates are preserved but Si recrystallizes and
the amorphous NiO film transforms into crystalline Ni
nanoparticles well distributed on the wafer surface. Process
parameters were optimized for Si substrates and transfer of
the process to ceramic LST/YSZ substrates is possible in
principle. However, a much higher number of ALD cycles (1200
compared to 100 for Si) are necessary to obtain Ni
nanoparticles of similar size and the number density of
particles is lower than observed for Si substrates.},
cin = {IEK-1 / IEK-2 / PGI-5},
ddc = {620},
cid = {I:(DE-Juel1)IEK-1-20101013 / I:(DE-Juel1)IEK-2-20101013 /
I:(DE-Juel1)PGI-5-20110106},
pnm = {134 - Electrolysis and Hydrogen (POF3-134)},
pid = {G:(DE-HGF)POF3-134},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000390622200051},
doi = {10.1016/j.surfcoat.2016.08.074},
url = {https://juser.fz-juelich.de/record/818231},
}