Electromagnetic radiation pressure

There are several ways to induce reactions in solids. The application of heat, electromagnetic radiation, pressure, ultrasound or some other form of energy may induce a transformation in a solid. For centuries, it has been a common practice to subject solid materials to heat in order to determine their thermal stability, to study their physical properties, or to convert one material into another. One important commercial reaction, that producing lime,... 

Abstract This review reports on the study of the interplay between magnetic coupling and spin transition in 2,2 -bipyrimidine (bpym)-bridged iron(II) dinuclear compounds. The coexistence of both phenomena has been observed in [Fe(bpym)(NCS)2]2(bpym), [Fe(bpym)(NCSe)2]2(bpym) and [Fe(bt)(NCS)2]2(bpym) (bpym = 2,2 -bipyrimidine, bt = 2,2 -bithiazoline) by the action of external physical perturbations such as heat, pressure or electromagnetic radiation. The competition between magnetic exchange and spin crossover has been studied in [Fe(bpym)(NCS)2]2(bpym) at 0.63 GPa. LIESST experiments carried out on [Fe(bpym)(NCSe)2]2(bpym) and [Fe(bt)(NCS)2]2(bpym) at 4.2 K have shown that it is possible to generate dinuclear molecules with different spin states in this class of compounds. A special feature of the spin crossover process in the dinuclear compounds studied so far is the plateau in the spin transition curve. Up to now, it has not been possible to explore with a microscopic physical method the nature of the species... 

Although the irradiance of the scattered light is of major interest to the experimentalist, there are several other aspects of light scattering that should be included in this review. These include cross-sections, radiation pressure, and electromagnetic energy absorption. The latter two phenomena can be related to cross-sections. 

The derivation above of the efficiency for radiation pressure is heuristic a rigorous derivation of this result, which was first obtained by Debye (1909), entails integrating the stress tensor of the electromagnetic field over a spherical surface surrounding the particle. 

Functional dyes are designed to interact with electromagnetic radiation, pH, electricity, heat, pressure and even frictional forces. Each of these interactions is discussed, beginning with the most important interaction, that with electromagnetic radiation. 

Calculating the. electromagnetic field near the focus of a very large aperture beam, and around a particle itself which is neither very small nor very large compared to the wavelength of the radiation, is notoriously very difficult and hence the exact analysis of the radiation pressure force acting on the nanorods becomes nearly intractable. Hence we try to understand the trend of the observed rotational motion by a simple dimensional analysis. 

---