Beilstein J. Nanotechnol.2010,1, 155–157, doi:10.3762/bjnano.1.18
. Scanning probe microscopy (SPM) uses probing tips to map properties, such as topography, local adhesive forces, elasticity, friction or magnetic properties. In the emerging fields of nanoscience and nanotechnology these types of microscopes help to characterize the nanoworld. In addition, local probes can
-scale to the micron scale of micromachinery. Mechanical actuation is used to reduce friction of these micro contacts.
An important aspect of SPM is the possibility to modify surfaces. The probing tip can be either used to push or pull atoms, molecules or particles across surfaces. These experiments give
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Figure 1:
Scanning probe microscopy: A large familiy of microscopes, which have in common that they use local...
Beilstein J. Nanotechnol.2010,1, 101–107, doi:10.3762/bjnano.1.12
coercivity of Hc = 280 Oe at 15 K and Hc= 40 Oe at 330 K. The large increase in coercivity at low temperature is in agreement with previous reports and with the model of superparamagnetic (SPM) particles [29][30].
After the deposition of Co on top of the NP arrays, the Hc at 15 K increases to 408 Oe and 455
composite (red triangles), respectively. The ZFC/FC curves for the NP monolayer show the regular behavior as expected from a SPM system, i.e., a peak in the ZFC curve marking the blocking temperature, Tb ≈ 250 K, of the system and the splitting of the ZFC and FC curves near Tb. However, an important feature
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Figure 1:
AFM (a) and SEM (b) images showing the self-assembly of the NPs in a close-packed hexagonal structu...