Beilstein J. Nanotechnol.2010,1, 55–59, doi:10.3762/bjnano.1.7
pulsed laser beam, without changing the NPs composition. These developments open up a new way to design magnetic alloys NPs with ideal morphologies and size for magnetic studies and applications.
Results and Discussion
CoPt NP thin films on amorphous alumina (a-Al2O3) were produced by pulsedlaser
deposition (PLD) in a high vacuum chamber [21][22]. a-Al2O3 and the metals are deposited by PLD using a KrF excimer laser at 248 nm with a pulse duration of 25 ns at a repetition rate of 5 Hz. Substrates were commercial transmission electron microscopy (TEM) grids on which an amorphous carbon layer with a
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Figure 1:
Schematic representation of the experimental setup: the sample is placed behind the back focal plan...
Beilstein J. Nanotechnol.2010,1, 24–47, doi:10.3762/bjnano.1.5
, in case of Pt, (111)-textured thin films (50 nm) were used which were obtained by pulsedlaserdeposition (PLD) at ambient temperature on MgO(001) or (100)-oriented films (80 nm) epitaxially grown by PLD on (001) strontium titanate (SrTiO3) crystals at 400 °C. In all cases, no special pre-treatment
nanoparticles on Pt films
The approach of compensating diamagnetic substrate signals by paramagnetic films is demonstrated by paramagnetic Pt(111) films on top of MgO(001) substrates. Pt films were deposited under UHV conditions at ambient temperature by pulsedlaserdeposition (PLD). For this purpose a 193 nm
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Scheme 1:
Preparation of NPs by a reverse micelle technique. PS-b-P2VP or PS-b-P4VP is dispersed in anhydrous...