Magnetic nanosensor

Based on the Faraday effect, the Spanish Space Agency INTA (Instituto Nacional de Tdcnica Aeroespacial) launched the first nanosatellite called NANOSAT in December 2004, with a magnetic nanosensor prepared by sol-gel... 

The Spanish Space Agency INTA launched the first nanosatellite called NANO-SAT-01 (Figure 40.17) on board a European rocket Ariane 5 from the French Guyana. The sateUite consists of a hexagonal device of less than 19 kg in weight and with a diameter of about 50 cm, which describes an LEO orbit with 655 km of altitude. The main objective of the satellite is to probe the operation and performance of micro- and nanotechnologies in space environment One of the scientific experiments implemented on board was the sol-gel-based magnetic nanosensor. 

Dye-doped polymeric beads are commonly employed in different formats (Fig. 5), namely as water-dispersible nanosensors, labels and in composite materials (DLR-referenced and multianalyte sensors, sensor arrays, magnetic materials, etc.). The sensing properties of the dye-doped beads are of little or no relevance in some more specific materials, e.g., the beads intended for photodynamic therapy (PDT). The different formats and applications of the beads will be discussed in more detail in the following section, and the relative examples of sensing materials will be given. 

Magnetic ceramic nanoparticles are becoming of increasing interest in a number of areas. One of these areas is using them for the location and detection of viruses a viral nanosensor. The approach is illustrated in Figure... 

Perez, J.M., Simeone, F.J., Saeki, Y., Josephson, L., and Weissleder, R. (2003) Viral-induced self-assembly of magnetic nanoparticles allows the detection of viral particles in biological media, J. Am. Chem. Soc. 125, 10192. Description of a viral nanosensor using iron oxide nanoparticles. This group is at Harvard Medical School. 

Varadan V. K, Linfeng Chen and Jining Xie. (2008). Nanomedicine design and applications of magnetic nanomaterials, nanosensors, wiley publisher, ISBN 978-0-470-03351-7. 

Figure 26.7 Magnetic sol-gel nanosensor responsible for the positioning and orientation of a satellite by the detection of the earth gravitational magnetic field. (Reprinted Figure 9 of Ref. [44] with permission from Springer Science-FBusiness Media.)...

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