To my mind, one of the more obscure manifestations of Nanoplasmonics is how the smallest nanoparticles can produce the biggest EMF fields at their boundaries. >From this reference:
http://www.sciencedaily.com/releases/2013/08/130829110421.htm Reproducing Nature's Chemistry: Researchers Alter Molecular Properties in a New Way Chemical reactions are sensitive to the degree of curvature in the boundary of the nanoparticle that the molecule is bound to. Small nanoparticles are active whereas the larger particles above 10 nanometers in diameter are not. The same power relationship is seen in Nanoplasmonics where large emf concentrations are seen just outside the boundaries of nanoparticles that are the smallest in a pile of randomly sized particles. Berry connection and curvature In physics, Berry connection and Berry curvature are related concepts, which can be viewed, respectively, as a local gauge potential and gauge field associated with the Berry phase. These concepts were introduced by Michael Berry in a paper published in 1984 emphasizing how geometric phases provide a powerful unifying concept in several branches of classical and quantum physics. Such phases have come to be known as Berry phases. http://en.wikipedia.org/wiki/Berry_connection_and_curvature To keep it simple, when the curvature of a solid structure is large, electrons follow a tightly curving path confined by the evanescent wave functions that completely confine the EMF to the surface of the particle in a non-radiating dark mode. Very small particles mean very high Barry curvature which then means extremely large electron confinement forces which in turn mean extremely large magnetic field generation. In a nutshell, in a mixed pile of random sized particles, the smallest nanoparticles will produce the biggest magnetic fields. However, these smallest nanoparticles must be driven by strong dipole input oscillations.
