By Yannick Champion, Hans-Jörg Fecht
The booklet identifies new nanometric architectures that will be of specific curiosity for purposes and the technological path to achieve them. Nano-architectures of curiosity are for optical, electric, magnetic, mechanical houses and reactivity in addition to for particular purposes akin to catalysis and clinical diagnostic and drug supply. Nano-architectures will be metals, alloys, ceramics, semi-conductors, polymers or hybrids inorganic-polymers fabrics. The e-book areas designated emphasis on an important technical points of the fabrication, the keep watch over and the characterisation of complicated nano-architectures.
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Sample text
2 Introduction Singlewalled carbon nanotubes (SWNT) are nanomaterials which possess remarkable physicochemical properties thanks to their nanometric size. The potential application field of these nanosystems is very broad, ranging from nanodevices to MEMS, actuators or sensors, chemical reactors… Still most of the practical sensing applications will involve an ensemble of SWNT rather than isolated nano-objects. To understand the evolution of the properties when putting the SWNT together is thus essential.
The color of grains depends on the impurity levels (Fe, Al), like with doped crystals, and on the orientation of crystals to the polished surface. The impurities of Fe and Al content in black grains are maximal. 30 Figure 1: The microstructure transformation in the ECAP deformed region on optical micrograph during first pass is shown. 6 mm on this optical photo. In the middle part of the photo, equiaxed structure changes in the grains occurred. On the right side of the photo, the grains have a different axis, as a result of SPD and their orientation corner (directivity angle) increased up to 45° to specimen axis, in alignment to metal plastic flow.
As shown in the SEM picture (Figure 8, cross-section of the specimen), during ten ECAP passes, step-by–step the coarse-grained microstructure of recrystallized copper (Figure 1, left Figure 8: SEM picture of the nanocrystalline copper on cross-section of specimen is shown 35 side) was turned to the nanocrystalline form, with the mean grain size less than 40 nm (Figure 9, axial section of the specimen). The white areas in the picture are defect zones (without sticking). 4° in the 2-Theta-scale of the X-ray picture.
